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FEATURES
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LT3060 45V VIN , Micropower, Low Noise, 100mA Low Dropout, Linear Regulator DESCRIPTION
The LT(R)3060 is a micropower, low dropout voltage (LDO) linear regulator that operates over a 1.6V to 45V input supply range. The device supplies 100mA of output current with a typical dropout voltage of 300mV. A single external capacitor provides programmable low noise reference performance and output soft-start functionality. The LT3060's quiescent current is merely 40A and provides fast transient response with a minimum 2.2F output capacitor. In shutdown, quiescent current is less than 1A and the reference soft-start capacitor is reset. The LT3060 optimizes stability and transient response with low ESR, ceramic output capacitors. The regulator does not require the addition of ESR as is common with other regulators. The LT3060 typically provides 0.1% line regulation and 0.03% load regulation. Internal protection circuitry includes reverse-battery protection, reverse-output protection, reverse-current protection, current limit with foldback and thermal shutdown. The LT3060 is an adjustable voltage regulator with an output voltage range from the 600mV reference to 44.5V. The LT3060 is offered in the thermally enhanced 8-lead TSOT-23 and 8-lead (2mm x 2mm x 0.75mm) DFN packages.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. ThinSOT is a Trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners.
Input Voltage Range: 1.6V to 45V Output Current: 100mA Quiescent Current: 40A Dropout Voltage: 300mV Low Noise: 30VRMS (10Hz to 100kHz) Adjustable Output: VREF = 600mV Output Tolerance: 2% Over Line, Load and Temperature Single Capacitor Soft-Starts Reference and Lowers Output Noise Shutdown Current: < 1A Reverse Battery Protection Current Limit Foldback Protection Thermal Limit Protection 8-Lead 2mm x 2mm x 0.75mm DFN and 8-Lead ThinSOT TM Packages
APPLICATIONS
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Battery-Powered Systems Automotive Power Supplies Industrial Power Supplies Avionic Power Supplies Portable Instruments
TYPICAL APPLICATION
1.8V Low Noise Regulator
DROPOUT VOLTAGE (mV) IN VIN 2.3V TO 45V 1F LT3060 SHDN ADJ 124k 1% OUT 249k 1% CFF 10nF VOUT 1.8V AT 100mA 30VRMS NOISE 10F 350 300 250 200 150 100 50
3060 TA01
Dropout Voltage
TJ = 25C
GND REF/BYP 10nF
0 0 10 20 30 40 50 60 70 80 90 100 OUTPUT CURRENT (mA)
3060 TA02
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LT3060 ABSOLUTE MAXIMUM RATINGS
(Note 1)
IN Pin Voltage ........................................................ 50V OUT Pin Voltage ..................................................... 50V Input-to-Output Differential Voltage (Note 2) ......... 50V ADJ Pin Voltage ..................................................... 50V SHDN Pin Voltage .................................................. 50V REF/BYP Pin Voltage ....................................... - 0.3V, 1V
Output Short-Circuit Duration .......................... Indefinite Operating Junction Temperature (Notes 3, 5, 13) LT3060E, LT3060I ..............................- 40C to 125C LT3060MPTS8.................................... -55C to 125C LT3060HTS8 ...................................... -40C to 150C Storage Temperature Range...................- 65C to 150C Lead Temperature (TS8 Soldering, 10 sec) ........... 300C
PIN CONFIGURATION
TOP VIEW REF/BYP 1 ADJ 2 OUT 3 OUT 4 9 GND 8 GND 7 SHDN 6 IN 5 IN SHDN 1 GND 2 GND 3 GND 4 TOP VIEW 8 REF/BYP 7 ADJ 6 OUT 5 IN
DC PACKAGE 8-LEAD (2mm 2mm) PLASTIC DFN TJMAX = 125C, JA = 48C/W TO 60C/W*, JC = 20C/W EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB * SEE APPLICATIONS INFORMATION SECTION
TS8 PACKAGE 8-LEAD PLASTIC TSOT-23 TJMAX = 150C, JA = 57C/W TO 67C/W*, JC = 25C/W
ORDER INFORMATION
LEAD FREE FINISH LT3060EDC#PBF LT3060IDC#PBF LT3060ETS8#PBF LT3060ITS8#PBF LT3060MPTS8#PBF LT3060HTS8#PBF LEAD BASED FINISH LT3060EDC LT3060IDC LT3060ETS8 LT3060ITS8 LT3060MPTS8 LT3060HTS8 TAPE AND REEL LT3060EDC#TRPBF LT3060IDC#TRPBF LT3060ETS8#TRPBF LT3060ITS8#TRPBF LT3060MPTS8#TRPBF LT3060HTS8#TRPBF TAPE AND REEL LT3060EDC#TR LT3060IDC#TR LT3060ETS8#TR LT3060ITS8#TR LT3060MPTS8#TR LT3060HTS8#TR PART MARKING* LDTD LDTD LTDTF LTDTF LTDTF LTDTF PART MARKING* LDTD LDTD LTDTF LTDTF LTDTF LTDTF PACKAGE DESCRIPTION 8-Lead (2mm x 2mm) Plastic DFN 8-Lead (2mm x 2mm) Plastic DFN 8-Lead Plastic ThinSOT 8-Lead Plastic ThinSOT 8-Lead Plastic ThinSOT 8-Lead Plastic ThinSOT PACKAGE DESCRIPTION 8-Lead (2mm x 2mm) Plastic DFN 8-Lead (2mm x 2mm) Plastic DFN 8-Lead Plastic ThinSOT 8-Lead Plastic ThinSOT 8-Lead Plastic ThinSOT 8-Lead Plastic ThinSOT TEMPERATURE RANGE -40C to 125C -40C to 125C -40C to 125C -40C to 125C -55C to 125C -40C to 150C TEMPERATURE RANGE -40C to 125C -40C to 125C -40C to 125C -40C to 125C -55C to 125C -40C to 150C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
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LT3060 ELECTRICAL CHARACTERISTICS
PARAMETER Minimum Input Voltage (Notes 4, 12) ADJ Pin Voltage (Notes 4, 5)
The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25C. (Note 3)
CONDITIONS ILOAD = 100mA VIN = 2.1V, ILOAD = 1mA 2.1V < VIN < 45V, 1mA < ILOAD < 100mA (E, I, MP Grade) 2.1V < VIN < 45V, 1mA < ILOAD < 100mA (H Grade) VIN = 2.1V to 45V, ILOAD = 1mA (E, I, MP Grade) VIN = 2.1V, ILOAD = 1mA to 100mA VIN = 2.1V, ILOAD = 1mA to 100mA (H Grade) ILOAD = 1mA ILOAD = 1mA ILOAD = 10mA ILOAD = 10mA ILOAD = 50mA (Note 14) ILOAD = 50mA (Note 14) ILOAD = 100mA (Note 14) ILOAD = 100mA (Note 14) ILOAD = 0A ILOAD = 1mA ILOAD = 10mA ILOAD = 50mA ILOAD = 100mA VIN = 45V, VSHDN = 0V VIN = 2.1V COUT = 10F, ILOAD = 100mA, CBYP = 0.01F VOUT = 600mV, BW = 10Hz to 100kHz VOUT = Off to On VOUT = On to Off VSHDN = 0V VSHDN = 45V VIN - VOUT = 1.5V (AVG), VRIPPLE = 0.5VP-P, fRIPPLE = 120Hz, ILOAD = 100mA VIN = 7V, VOUT = 0 VIN = VOUT(NOMINAL) + 1V (Notes 6, 12), VOUT = -5% VIN = -45V, VOUT = 0 VOUT = 1.2V, VIN = 0 MIN
l l l l l l l l l l l l l l l l
594 588 585
TYP 1.6 600
Line Regulation (Note 4) Load Regulation (Note 4) Dropout Voltage VIN = VOUT(NOMINAL) (Notes 6, 7)
0.6 0.2 75 150 240 300 40 60 160 0.8 2 0.3 15 30 0.8 0.7 0.9 85 200 110 0.2
MAX 2.1 606 612 612 3.5 4 9 110 180 200 300 280 410 350 510 80 100 350 1.8 4 1 60
UNITS V mV mV mV mV mV mV mV mV mV mV mV mV mV mV A A A mA mA A nA VRMS
GND Pin Current VIN = VOUT(NOMINAL) + 0.55V (Notes 6, 8)
Quiescent Current in Shutdown ADJ Pin Bias Current (Notes 4, 9) Output Voltage Noise Shutdown Threshold SHDN Pin Current (Note 10) Ripple Rejection (Note 4) Current Limit Input Reverse Leakage Current Reverse Output Current (Note 11)
l l l l
1.5 1 3
0.3
65
V V A A dB mA mA A A
l l
300 10
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LT3060 ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25C. (Note 3)
Note 6: To satisfy minimum input voltage requirements, the LT3060 is tested and specified for these conditions with an external resistor divider (bottom 115k, top 365k) for an output voltage of 2.5V. The external resistor divider adds 5A of DC load on the output. The external current is not factored into GND pin current. Note 7: Dropout voltage is the minimum input-to-output voltage differential needed to maintain regulation at a specified output current. In dropout, the output voltage equals: (VIN - VDROPOUT). For some output voltages, minimum input voltage requirements limit dropout voltage. Note 8: GND pin current is tested with VIN = V(OUT(NOMINAL) + 0.5V and a current source load. GND pin current will increase in dropout. See GND pin current curves in the Typical Performance Characteristics section. Note 9: ADJ pin bias current flows out of the ADJ pin. Note 10: SHDN pin current flows into the SHDN pin. Note 11: Reverse output current is tested with the IN pin grounded and the OUT pin forced to the rated output voltage. This current flows into the OUT pin and out of the GND pin. Note 12: To satisfy requirements for minimum input voltage, current limit is tested at VIN = VOUT(NOMINAL) + 1V or VIN = 2.1V, whichever is greater. Note 13: This IC includes overtemperature protection that protects the device during momentary overload conditions. Junction temperature will exceed 125C (LT3060E, LT3060I, LT3060MP) or 150C (LT3060H) when overtemperature circuitry is active. Continuous operation above the specified maximum junction temperature may impair device reliability. Note 14: The dropout voltage specification is guaranteed for the DFN package. The dropout voltage specification for high output currents cannot be guaranteed for the TS8 package due to production test limitations.
Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: Absolute maximum input-to-output differential voltage is not achievable with all combinations of rated IN pin and OUT pin voltages. With the IN pin at 50V, the OUT pin may not be pulled below 0V. The total measured voltage from IN to OUT must not exceed 50V. Note 3: The LT3060 is tested and specified under pulse load conditions such that TJ TA . The LT3060E regulator is 100% tested at TA = 25C. Performance at -40C to 125C is assured by design, characterization and correlation with statistical process controls. The LT3060I regulator is guaranteed over the full -40C to 125C operating junction temperature range. The LT3060MP is 100% tested over the -55C to 125C operating junction temperature range. The LT3060H is 100% tested over the -40C to 150C operating junction temperature range. High junction temperatures degrade operating lifetimes. Operating lifetime is derated at junction temperatures greater than 125C. Note 4: The LT3060 is tested and specified for these conditions with the ADJ connected to the OUT pin. Note 5: Maximum junction temperature limits operating conditions. The regulated output voltage specification does not apply for all possible combinations of input voltage and output current. Limit the output current range if operating at the maximum input-to-output voltage differential. Limit the input-to-output voltage differential if operating at maximum output current. Current limit foldback will limit the maximum output current as a function of input-to-output voltage. See Current Limit vs VIN - VOUT in the Typical Performance Characteristics section.
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LT3060 TYPICAL PERFORMANCE CHARACTERISTICS
Typical Dropout Voltage
550 GUARANTEED DROPOUT VOLTAGE (mV) 500 450 DROPOUT VOLTAGE (mV) 400 350 300 250 200 150 100 50 0 0 10 20 30 40 50 60 70 80 90 100 OUTPUT CURRENT (mA)
3060 G01
TA = 25C, unless otherwise noted.
Guaranteed Dropout Voltage
550 500 450 400 350 300 250 200 150 100 50 0 0 10 20 30 40 50 60 70 80 90 100 OUTPUT CURRENT (mA)
3060 G02
Dropout Voltage
550 500 450 IL = 100mA IL = 50mA
= TEST POINTS
TJ 150C
DROPOUT VOLTAGE (mV)
400 350 300 250 200 150 100 50
TJ = 125C
TJ 25C
TJ = 25C
IL = 10mA IL = 1mA
0 -75 -50 -25 0 25 50 75 100 125 150 175 TEMPERATURE (C)
3060 G03
Quiescent Current
80 VIN = 6V 70 RL = 120k, IL = 5A QUIESCENT CURRENT (A) ADJ PIN VOLTAGE (V) 60 50 40 30 20 10 VSHDN = 0V 0 -75 -50 -25 0 25 50 75 100 125 150 175 TEMPERATURE (C)
3060 G04
ADJ Pin Voltage
0.612 IL = 1mA 0.610 V = 2.1V IN 0.608 0.606 0.604 0.602 0.600 0.598 0.596 0.594 0.592 0.590 0.588 -75 -50 -25 0 25 50 75 100 125 150 175 TEMPERATURE (C)
3060 G05
2.5V Quiescent Current
200 175 QUIESCENT CURRENT (A) 150 125 100 75 VSHDN = VIN 50 25 0 0 5 10 VSHDN = 0 15 20 25 30 35 INPUT VOLTAGE (V) 40 45 TJ = 25C RL = 500k VOUT = 2.5V
VSHDN = VIN
3060 G06
Quiescent Current
80 70 QUIESCENT CURRENT (A) 60 50 40 30 20 10 VSHDN = 0 0 0 5 10 15 20 25 30 35 INPUT VOLTAGE (V) 40 45 0 VSHDN = VIN TJ = 25C RL = 120k VOUT = 0.6V GND PIN CURRENT (mA) 2.50 2.25 2.00 1.75 1.50 1.25 1.00 0.75 0.50 0.25
2.5V GND Pin Current
TJ = 25C *FOR VOUT = 2.5V VSHDN = VIN GND PIN CURRENT (mA) RL = 25 IL = 100mA* 2.50 2.25 2.00 1.75 1.50 1.25 1.00 0.75 0.50 0.25 0 0 1 2 34567 INPUT VOLTAGE (V) 8 9 10
0.6V GND Pin Current
TJ = 25C *FOR VOUT = 0.6V VSHDN = VIN RL = 6 IL = 100mA*
RL = 50 IL = 50mA* RL = 2.5k IL = 1mA* RL = 250 IL = 10mA*
RL = 12 IL = 50mA* RL = 600 IL = 1mA* RL = 60 IL = 10mA* 8 9 10
0
1
2
34567 INPUT VOLTAGE (V)
3060 G07
3060 G08
3060 G09
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LT3060 TYPICAL PERFORMANCE CHARACTERISTICS
GND Pin Current vs ILOAD
4.0 3.5 GND PIN CURRENT (mA) 3.0 2.5 2.0 1.5 1.0 0.5 0 0 10 20 30 40 50 60 70 80 90 100 OUTPUT CURRENT (mA)
3060 G10
TA = 25C, unless otherwise noted.
SHDN Pin Threshold
1.5 1.4 1.3 1.2 1.1 1.0 0.9 OFF TO ON 0.8 0.7 0.6 ON TO OFF 0.5 0.4 0.3 0.2 0.1 0 -75 -50 -25 0 25 50 75 100 125 150 175 TEMPERATURE (C)
3060 G11
SHDN Pin Input Current
2.0 1.8 SHDN PIN INPUT CURRENT (A) 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 0 5 10 15 20 25 30 35 SHDN PIN VOLTAGE (V) 40 45
VIN = VOUT(NOMINAL) + 1V SHDN PIN THRESHOLD (V)
3060 G12
SHDN Pin Input Current
2.0 1.8 SHDN PIN INPUT CURRENT (A) 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 -75 -50 -25 0 25 50 75 100 125 150 175 TEMPERATURE (C)
3060 G13
ADJ Pin Bias Current
50 40 ADJ PIN BIAS CURRENT (nA) 30 CURRENT LIMIT (mA) 20 10 0 -10 -20 -30 -40 -50 -75 -50 -25 0 25 50 75 100 125 150 175 TEMPERATURE (C)
3060 G14
Current Limit vs VIN -VOUT
250 225 200 175 150 125 100 75 50 25 0 0 5 10 15 20 25 30 35 40 INPUT/OUTPUT DIFFERENTIAL (V) 45 TJ = -50C TJ = 125C TJ = 25C VOUT = - 5%
VSHDN = 45V
3060 G15
Current Limit vs Temperature
250 REVERSE OUTPUT CURRENT (mA) 225 200 CURRENT LIMIT (mA) 175 150 125 100 75 50 25 VIN = 7V VOUT = 0V 0 -75 -50 -25 0 25 50 75 100 125 150 175 TEMPERATURE (C)
3060 G16
Reverse Output Current
2.0 REVERSE OUTPUT CURRENT (A) TJ = 25C 1.8 VIN = 0V CURRENT FLOWS 1.6 INTO OUT PIN 1.4 VOUT = VADJ 1.2 1.0 0.8 0.6 0.4 0.2 0 0 5 10 15 20 25 30 35 OUTPUT VOLTAGE (V) 40 45 OUT ADJ 50 45 40 35 30 25 20 15 10 5
Reverse Output Current
VIN = 0V VOUT = VADJ = 1.2V
ADJ OUT
0 -75 -50 -25 0 25 50 75 100 125 150 175 TEMPERATURE (C)
3060 G18
3060 G17
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LT3060 TYPICAL PERFORMANCE CHARACTERISTICS
Input Ripple Rejection
100 90 80 RIPPLE REJECTION (dB) RIPPLE REJECTION (dB) 70 60 50 40 30 I = 100mA 20 L CREF/BYP = CFF = 0 10 VIN = VOUT(NOMINAL) + 1.5V + COUT = 2.2F 50mVRMS RIPPLE 0 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz)
3060 G19
TA = 25C, unless otherwise noted.
5V Input Ripple Rejection
100 90 80 CREF/BYP = CFF = 10nF CREF/BYP = 10nF CFF = 0 , RIPPLE REJECTION (dB) 100 90 80 70 60 50 40 30
Ripple Rejection vs Temperature
CREF/BYP = 10nF CREF/BYP = 0
VOUT = 0.6V
VOUT = 5V COUT = 10F
70 60 50 40 30 IL = 100mA VOUT = 5V CREF/BYP = CFF = 0 10 COUT = 10F VIN = 6V + 50mVRMS RIPPLE 0 10 100 1k 10k 100k 1M FREQUENCY (Hz) 20
10M
3060 G20
20 I = 100mA L 10 VOUT = 0.6V VIN = 2.6V + 0.5VP-P RIPPLE AT f = 120Hz 0 -75 -50 -25 0 25 50 75 100 125 150 175 TEMPERATURE (C)
3060 G21
Minimum Input Voltage
2.2 2.0 MINIMUM INPUT VOLTAGE (V) 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 VSHDN = VIN 0 -75 -50 -25 0 25 50 75 100 125 150 175 TEMPERATURE (C)
3060 G22
Load Regulation
3 LOAD REGULATION (mV) OUTPUT NOISE SPECTRAL DENSITY (V/Hz) 4 10
Output Noise Spectral Density CREF/BYP = 0, CFF = 0
IL = 100mA IL = 50mA
2 1 0 -1 -2 VIN = 2.1V -3 VOUT = 0.6V IL = 1mA TO 100mA -4 -75 -50 -25 0 25 50 75 100 125 150 175 TEMPERATURE (C)
3060 G23
1
0.1
0.01 10
VOUT = 5V VOUT = 3.3V VOUT = 2.5V VOUT = 1.8V VOUT = 1.5V VOUT = 1.2V VOUT = 0.6V 100
COUT = 10F IL = 100mA 100k
3060 G24
10k 1k FREQUENCY (Hz)
Output Noise Spectral Density vs CREF/BYP, CFF = 0
OUTPUT NOISE SPECTRAL DENSITY (V/Hz) OUTPUT NOISE SPECTRAL DENSITY (V/Hz) 10 VOUT = 5V CREF/BYP = 100pF 10
Output Noise Spectral Density vs CFF, CREF/BYP = 10nF
110 OUTPUT NOISE VOLTAGE (VRMS)
RMS Output Noise vs Load Current vs CREF/BYP, CFF = 0
VOUT = 0.6V 100 COUT = 10F 90 80 70 60 50 40 30 20 10 100k
3060 G26
CREF/BYP = 0 CREF/BYP = 10pF
1 VOUT = 0.6V
1 CFF = 10nF
CFF = 0
CREF/BYP = 100pF CREF/BYP = 1nF CREF/BYP = 10nF CREF/BYP = 100nF 0.1 1 10 LOAD CURRENT (mA) 100
3060 G27
0.1 CREF/BYP = 10nF COUT = 10F IL = 100mA 10 100 CREF/BYP = 1nF
0.1 VOUT = 5V COUT = 10F IL = 100mA 10 100 CFF = 1nF
CFF = 100pF
0.01
0.01
1k 10k FREQUENCY (Hz)
100k
3060 G25
1k 10k FREQUENCY (Hz)
0 0.01
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LT3060 TYPICAL PERFORMANCE CHARACTERISTICS
RMS Output Noise vs Load Current CREF/BYP = 10nF, CFF = 0
170 160 f = 10Hz TO 100kHz VOUT = 5V 150 COUT = 10F 140 VOUT = 2.5V 130 VOUT = 3.3V 120 VOUT = 1.8V 110 100 VOUT = 1.5V 90 80 70 60 50 40 VOUT = 1.2V 30 20 VOUT = 0.6V 10 0 0.01 0.1 1 10 100 LOAD CURRENT (mA)
3060 G28
TA = 25C, unless otherwise noted. RMS Output Noise vs Feedforward Capacitor (CFF)
120 110 OUTPUT NOISE VOLTAGE (VRMS) 100 90 80 70 60 50 40 30 VOUT = 5V VOUT = 3.3V VOUT = 2.5V
OUTPUT NOISE VOLTAGE (VRMS)
f = 10Hz TO 100kHz CREF/BYP = 10nF COUT = 10F IFB-DIVIDER = 5A IL = 100mA
20 VOUT = 1.8V VOUT = 1.2V VOUT = 0.6V 10 VOUT = 1.5V 0 1n 10n 10p 100p FEEDFORWARD CAPACITOR, CFF (F)
3060 G29
5V 10Hz to 100kHz Output Noise CREF/BYP = 10nF, CFF = 0
5V 10Hz to 100kHz Output Noise CREF/BYP = 10nF, CFF = 10nF
VOUT 100V/DIV
VOUT 100V/DIV
COUT = 10F IL = 100mA
1ms/DIV
3060 G30
COUT = 10F IL = 100mA
1ms/DIV
3060 G31
5V Transient Response CFF = 0
VOUT 50mV/DIV VOUT = 5V VOUT 20mV/DIV
5V Transient Response CFF = 10nF
VOUT = 5V
IOUT = 10mA TO 100mA
IOUT = 10mA TO 100mA
IOUT 50mA/DIV VIN = 6V 100s/DIV COUT = CIN = 10F IFB-DIVIDER = 5A
3060 G32
IOUT 50mA/DIV VIN = 6V 20s/DIV COUT = CIN = 10F IFB-DIVIDER = 5A
3060 G33
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LT3060 TYPICAL PERFORMANCE CHARACTERISTICS
5V Transient Response Load Dump
VOUT VOUT = 5V 10mV/DIV VIN = 12V TO 45V VOUT 2V/DIV RL = 50 REF/BYP 500mV/DIV VIN 10V/DIV 2ms/DIV COUT = CIN = 2.2F CREF/BYP = CFF = 10nF IFB-DIVIDER = 5A
3060 G34
TA = 25C, unless otherwise noted. SHDN Transient Response CREF/BYP = 0
SHDN 1V/DIV
3060 G35
COUT = CIN = 2.2F CFF = 0
4ms/DIV
SHDN Transient Response CREF/BYP = 10nF
100 VOUT 2V/DIV RL = 50 REF/BYP 500mV/DIV SHDN 1V/DIV
3060 G36
Start-Up Time vs REF/BYP Capacitor
CFF = 0
START-UP TIME (ms) COUT = CIN = 2.2F CFF = 0 4ms/DIV
10
1
0.1
0.01 10p
100p 10n 1n REF/BYP CAPACITOR (F)
100n
3060 G37
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LT3060 PIN FUNCTIONS
(DC8/TS8)
REF/BYP (Pin 1 / Pin 8): Reference/Bypass. Connecting a single capacitor from this pin to GND bypasses the LT3060's reference noise and soft-starts the reference. A 10nF bypass capacitor typically reduces output voltage noise to 30VRMS in a 10Hz to 100kHz bandwidth. Softstart time is directly proportional to the REF/BYP capacitor value. If the LT3060 is placed in shutdown, REF/BYP is actively pulled low by an internal device to reset soft-start. If low noise or soft-start performance is not required, this pin must be left floating (unconnected). Do not drive this pin with any active circuitry. ADJ (Pin 2 / Pin 7): Adjust. This pin is the error amplifier's inverting terminal. It's typical bias current of 15nA flows out of the pin (see curve of ADJ Pin Bias Current vs Temperature in the Typical Performance Characteristics section). The ADJ pin voltage is 600mV referenced to GND. OUT (Pins 3, 4 / Pin 6): Output. These pin(s) supply power to the load. Stability requirements demand a minimum 2.2F ceramic output capacitor to prevent oscillations. Large load transient applications require larger output capacitors to limit peak voltage transients. See the Applications Information section for details on transient response and reverse output characteristics. Permissible output voltage range is 600mV to 44.5V. IN (Pins 5, 6 / Pin 5): Input. These pin(s) supply power to the device. The LT3060 requires a local IN bypass capacitor if it is located more than six inches from the main input filter capacitor. In general, battery output impedance rises with frequency, so adding a bypass capacitor in batterypowered circuits is advisable.
An input bypass capacitor in the range of 1F to 10F suffices. The LT3060 withstands reverse voltages on the IN pin with respect to its GND and OUT pins. In a reversed input situation, such as a battery plugged in backwards, the LT3060 behaves as if a large resistor is in series with its input. Limited reverse current flows into the LT3060 and no reverse voltage appears at the load. The device protects itself and the load. SHDN (Pin 7 / Pin 1): Shutdown. Pulling the SHDN pin low puts the LT3060 into a low power state and turns the output off. Drive the SHDN pin with either logic or an open collector/drain with a pull-up resistor. The resistor supplies the pull-up current to the open collector/drain logic, normally several microamperes, and the SHDN pin current, typically less than 3A. If unused, connect the SHDN pin to IN. The LT3060 does not function if the SHDN pin is not connected. The SHDN pin cannot be driven below GND unless tied to the IN pin. If the SHDN pin is driven below GND while IN is powered, the output may turn on. SHDN pin logic cannot be referenced to a negative supply voltage. GND (Pin 8, Exposed Pad Pin 9 / Pins 2, 3, 4): Ground. Connect the bottom of the external resistor divider that sets the output voltage directly to GND for optimum regulation. For the DFN package, tie exposed pad Pin 9 directly to Pin 8 and the PCB ground. This exposed pad provides enhanced thermal performance with its connection to the PCB ground. See the Applications Information section for thermal considerations and calculating junction temperature.
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LT3060 APPLICATIONS INFORMATION
The LT3060 is a micropower, low noise, low dropout voltage, 100mA linear regulator with micropower shutdown. The device supplies up to 100mA at a typical dropout voltage of 300mV and operates over a 1.6V to 45V input range. A single external capacitor can provide programmable low noise reference performance and output soft-start functionality. For example, connecting a 10nF capacitor from the REF/BYP pin to GND lowers output noise to 30VRMS over a 10Hz to 100kHz bandwidth. This capacitor also soft-starts the reference and prevents output voltage overshoot at turn-on. The LT3060's quiescent current is merely 40A but provides fast transient response with a minimum low ESR 2.2F ceramic output capacitor. In shutdown, quiescent current is less than 1A and the reference soft-start capacitor is reset. The LT3060 optimizes stability and transient response with low ESR, ceramic output capacitors. The regulator does not require the addition of ESR as is common with other regulators. The LT3060 typically provides 0.1% line regulation and 0.03% load regulation. Internal protection circuitry includes reverse-battery protection, reverse-output protection, reverse-current protection, current limit with foldback and thermal shutdown. This "bullet-proof" protection set makes it ideal for use in battery-powered systems. In battery backup applications where the output is held up by a backup battery and the input is pulled to ground, the LT3060 acts like it has a diode in series with its output and prevents reverse current flow. Additionally, in dual supply applications where the regulator load is returned to a negative supply, the output can be pulled below ground by as much as 45V and the device still starts normally and operates. Adjustable Operation The LT3060 has an output voltage range of 0.6V to 44.5V. The output voltage is set by the ratio of two external resistors, as shown in Figure 1. The device servos the output to maintain the ADJ pin voltage at 0.6V referenced to ground. The current in R1 is then equal to 0.6V/R1, and the current in R2 is the current in R1 minus the ADJ pin bias current.
IN VIN OUT LT3060 SHDN ADJ R1 R2 R2 VOUT = 0.6 V 1+ - IADJ * R2 R1 VOUT
GND REF/BYP
(
)
VADJ = 0.6 V IADJ = 15nA at 25 C
3060 F01
OUTPUT RANGE = 0.6 V to 44.5V
Figure 1. Adjustable Operation
The ADJ pin bias current, 15nA at 25C, flows from the ADJ pin through R1 to GND. Calculate the output voltage using the formula in Figure 1. The value of R1 should be no greater than 124k to provide a minimum 5A load current so that errors in the output voltage, caused by the ADJ pin bias current, are minimized. Note that in shutdown, the output is turned off and the divider current is zero. Curves of ADJ Pin Voltage vs Temperature and ADJ Pin Bias Current vs Temperature appear in the Typical Performance Characteristics Section. The LT3060 is tested and specified with the ADJ pin tied to the OUT pin, yielding VOUT = 0.6V. Specifications for output voltages greater than 0.6V are proportional to the ratio of the desired output voltage to 0.6V: VOUT /0.6V. For example, load regulation for an output current change of 1mA to 100mA is 0.2mV (typical) at VOUT = 0.6V. At VOUT = 12V, load regulation is: 12V * (0.2mV) = 4mV 0.6 V Table 1 shows 1% resistor divider values for some common output voltages with a resistor divider current of 5A.
Table 1. Output Voltage Resistor Divider Values
VOUT
(V)
R1 (k ) 118 121 124 115 124 124 115
R2 (k ) 118 182 249 365 499 562 845
1.2 1.5 1.8 2.5 3 3.3 5
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11
LT3060 APPLICATIONS INFORMATION
Bypass Capacitance, Output Voltage Noise and Transient Response The LT3060 regulator provides low output voltage noise over the 10Hz to 100kHz bandwidth while operating at full load with the addition of a reference bypass capacitor (CREF/BYP) from the REF/BYP pin to GND. A good quality, low leakage capacitor is recommended. This capacitor will bypass the internal reference of the regulator, providing a low frequency noise pole. With the use of 10nF for CREF/BYP, the output voltage noise decreases to as low as 30VRMS when the output voltage is set for 0.6V. For higher output voltages (generated by using a feedback resistor divider), the output voltage noise gains up accordingly when using CREF/BYP by itself. To lower the output voltage noise for higher output voltages, include a feedforward capacitor (CFF) from VOUT to the ADJ pin. A good quality, low leakage capacitor is recommended. This capacitor will bypass the error amplifier of the regulator, providing a low frequency noise pole. With the use of 10nF for both CFF and CREF/BYP, output voltage noise decreases to 30VRMS when the output voltage is set to 5V by a 5A feedback resistor divider. If the current in the feedback resistor divider is doubled, CFF must also be doubled to achieve equivalent noise performance. Higher values of output voltage noise are often measured if care is not exercised with regard to circuit layout and testing. Crosstalk from nearby traces induces unwanted noise onto the LT3060's output. Power supply ripple rejection must also be considered. The LT3060 regulator does not have unlimited power supply rejection and passes a small portion of the input noise through to the output. Using a feedforward capacitor (CFF) from VOUT to the ADJ pin has the added benefit of improving transient response for output voltages greater than 0.6V. With no feedforward capacitor, the settling time will increase as the output voltage is raised above 0.6V. Use the equation in Figure 2 to determine the minimum value of CFF to achieve a transient response that is similar to 0.6V output voltage performance regardless of the chosen output voltage (See Figure 3 and Transient Response in the Typical Performance Characteristics section). During start-up, the internal reference will soft-start if a reference bypass capacitor is present. Regulator startup time is directly proportional to the size of the bypass capacitor, slowing to 6ms with a 10nF bypass capacitor (See Start-up Time vs REF/BYP Capacitor in the Typical Performance Characteristics section). The reference bypass capacitor is actively drained during shutdown to reset the internal reference soft-start.
IN VIN OUT LT3060 SHDN ADJ R1 4.7nF * IFB-DIVIDER 5A V IFB-DIVIDER = OUT R1+R 2 CFF R2 CFF VOUT COUT
GND REF/BYP
(
)
CREF/BYP
3060 F02
Figure 2. Feedforward Capacitor for Fast Transient Response
FEEDFORWARD CAPACITOR, CFF
0
VOUT = 5V COUT = 10F IFB-DIVIDER = 5A VOUT 50mV/DIV
100pF 1nF 10nF
LOAD CURRENT 100mA/DIV 100s/DIV
3060 F03
Figure 3. Transient Response vs Feedforward Capacitor
Start-up time is also affected by the presence of a feedforward capacitor. Start-up time is directly proportional to the size of the feedforward capacitor and the output voltage, and is inversely proportional to the feedback resistor divider current, slowing to 15ms with a 4.7nF feedforward capacitor and a 10F output capacitor for an output voltage set to 5V by a 5A feedback resistor divider. Output Capacitance The LT3060 regulator is stable with a wide range of output capacitors. The ESR of the output capacitor affects stability, most notably with small capacitors. Use a minimum output capacitor of 2.2F with an ESR of 3 or less to prevent oscillations. If a feedforward capacitor is used with output
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12
LT3060 APPLICATIONS INFORMATION
voltages set for greater than 24V, use a minimum output capacitor of 4.7F. The LT3060 is a micropower device and output load transient response is a function of output capacitance. Larger values of output capacitance decrease the peak deviations and provide improved transient response for larger load current changes. Bypass capacitors, used to decouple individual components powered by the LT3060, increase the effective output capacitor value. For applications with large load current transients, a low ESR ceramic capacitor in parallel with a bulk tantalum capacitor often provides an optimally damped response. Give extra consideration to the use of ceramic capacitors. Manufacturers make ceramic capacitors with a variety of dielectrics, each with different behavior across temperature and applied voltage. The most common dielectrics are specified with EIA temperature characteristic codes of Z5U, Y5V, X5R and X7R. The Z5U and Y5V dielectrics provide high C-V products in a small package at low cost, but exhibit strong voltage and temperature coefficients, as shown in Figures 4 and 5. When used with a 5V regulator, a 16V 10F Y5V capacitor can exhibit an effective value as low as 1F to 2F for the DC bias voltage applied, and over the operating temperature range. The X5R and X7R dielectrics yield much more stable characteristics and are more suitable for use as the output capacitor. The X7R type works over a wider temperature range and has better temperature stability, while the X5R is less expensive and is available in higher values. Care still must be exercised when using X5R and X7R capacitors; the X5R and X7R codes only specify operating temperature range and maximum capacitance change over temperature. Capacitance change due to DC bias with X5R and X7R capacitors is better than Y5V and Z5U capacitors, but can still be significant enough to drop capacitor values below appropriate levels. Capacitor DC bias characteristics tend to improve as component case size increases, but expected capacitance at operating voltage should be verified. Voltage and temperature coefficients are not the only sources of problems. Some ceramic capacitors have a piezoelectric response. A piezoelectric device generates voltage across its terminals due to mechanical stress, similar to the way a piezoelectric accelerometer or microphone works. For a ceramic capacitor, the stress is induced by vibrations in the system or thermal transients. The resulting voltages produced cause appreciable amounts of noise. A ceramic capacitor produced the trace in Figure 6 in response to light tapping from a pencil. Similar vibration induced behavior can masquerade as increased output voltage noise.
20 0 CHANGE IN VALUE (%) X5R -20 -40 -60 Y5V -80 -100 BOTH CAPACITORS ARE 16V, 1210 CASE SIZE, 10F
0
2
4
8 6 10 12 DC BIAS VOLTAGE (V)
14
16
3060 F04
Figure 4. Ceramic Capacitor DC Bias Characteristics
40 20 CHANGE IN VALUE (%) 0 -20 -40 -60 -80 BOTH CAPACITORS ARE 16V, 1210 CASE SIZE, 10F 50 25 75 0 TEMPERATURE (C) 100 125
3060 F05
X5R
Y5V
-100 -50 -25
Figure 5. Ceramic Capacitor Temperature Characteristics
VOUT = 0.6V COUT = 10F CREF/BYP = 10nF ILOAD = 100mA VOUT 500V/DIV
4ms/DIV
3060 F06
Figure 6. Noise Resulting from Tapping on a Ceramic Capacitor
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13
LT3060 APPLICATIONS INFORMATION
Overload Recovery Like many IC power regulators, the LT3060 has safe operating area protection. The safe operating area protection decreases current limit as input-to-output voltage increases, and keeps the power transistor inside a safe operating region for all values of input-to-output voltage. The LT3060 provides some output current at all values of input-to-output voltage up to the specified 45V operational maximum. When power is first applied, the input voltage rises and the output follows the input; allowing the regulator to start-up into very heavy loads. During start-up, as the input voltage is rising, the input-to-output voltage differential is small, allowing the regulator to supply large output currents. With a high input voltage, a problem can occur wherein the removal of an output short will not allow the output to recover. Other regulators, such as the LT1083/LT1084/ LT1085 family and LT1764A also exhibit this phenomenon, so it is not unique to the LT3060. The problem occurs with a heavy output load when the input voltage is high and the output voltage is low. Common situations are: (1) immediately after the removal of a short-circuit or (2) if the shutdown pin is pulled high after the input voltage is already turned on. The load line intersects the output current curve at two points creating two stable output operating points for the regulator. With this double intersection, the input power supply needs to be cycled down to zero and brought up again for the output to recover. Thermal Considerations The power handling capability of the device will be limited by the maximum rated junction temperature (125C for LT3060E, LT3060I, LT3060MP or 150C for LT3060H). Two components comprise the power dissipated by the device: 1. Output current multiplied by the input/output voltage differential: IOUT * (VIN -VOUT), and 2. GND pin current multiplied by the input voltage: IGND * VIN GND pin current is determined using the GND Pin Current curves in the Typical Performance Characteristics section. Power dissipation equals the sum of the two components listed above. The LT3060 regulator has internal thermal limiting that protects the device during overload conditions. For continuous normal conditions, the maximum junction temperature of 125C (E-grade, I-grade, MP-grade) or 150C (H-grade) must not be exceeded. Carefully consider all sources of thermal resistance from junction-to-ambient including other heat sources mounted in proximity to the LT3060. The underside of the LT3060 DFN package has exposed metal (1mm2) from the lead frame to the die attachment. The package allows heat to directly transfer from the die junction to the printed circuit board metal to control maximum operating junction temperature. The dual-in-line pin arrangement allows metal to extend beyond the ends of the package on the topside (component side) of a PCB. Connect this metal to GND on the PCB. The multiple IN and OUT pins of the LT3060 also assist in spreading heat to the PCB. For surface mount devices, heat sinking is accomplished by using the heat spreading capabilities of the PC board and its copper traces. Copper board stiffeners and plated through-holes also can spread the heat generated by power devices. The following tables list thermal resistance for several different board sizes and copper areas. All measurements were taken in still air on a 4 layer FR-4 board with 1oz solid internal planes and 2oz top/bottom external trace planes with a total board thickness of 1.6mm. The four layers were electrically isolated with no thermal vias present. PCB layers, copper weight, board layout and thermal vias will affect the resultant thermal resistance. For more information on thermal resistance and high thermal conductivity test boards, refer to JEDEC standard JESD51, notably JESD51-12 and JESD51-7. Achieving low thermal resistance necessitates attention to detail and careful PCB layout.
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14
LT3060 APPLICATIONS INFORMATION
Table 2. DC Package, 8-Lead DFN
COPPER AREA TOPSIDE* BACKSIDE (mm2) (mm2) 2500 1000 225 100 50 2500 2500 2500 2500 2500 BOARD AREA (mm2) 2500 2500 2500 2500 2500 THERMAL RESISTANCE (JUNCTION-TO-AMBIENT) 48C/W 49C/W 50C/W 54C/W 60C/W
The maximum junction temperature equals the maximum ambient temperature plus the maximum junction temperature rise above ambient or: TJMAX = 85C + 27.8C = 112.8C Protection Features The LT3060 incorporates several protection features that make it ideal for use in battery-powered circuits. In addition to the normal protection features associated with monolithic regulators, such as current limiting and thermal limiting, the device also protects against reverse-input voltages, reverse-output voltages and reverse output-toinput voltages. Current limit protection and thermal overload protection protect the device against current overload conditions at the output of the device. The typical thermal shutdown temperature is 165C. For normal operation, do not exceed a junction temperature of 125C (LT3060E, LT3060I, LT3060MP) or 150C (LT3060H). The LT3060 IN pin withstands reverse voltages up to 50V. The device limits current flow to less than 300A (typically less than 50A) and no negative voltage appears at OUT. The device protects both itself and the load against batteries that are plugged in backwards. The SHDN pin cannot be driven below GND unless tied to the IN pin. If the SHDN pin is driven below GND while IN is powered, the output may turn on. SHDN pin logic cannot be referenced to a negative supply voltage. The LT3060 incurs no damage if its output is pulled below ground. If the input is left open-circuit or grounded, the output can be pulled below ground by 50V. No current flows through the pass transistor from the output. However, current flows in (but is limited by) the resistor divider that sets the output voltage. Current flows from the bottom resistor in the divider and from the ADJ pin's internal clamp through the top resistor in the divider to the external circuitry pulling OUT below ground. If the input is powered by a voltage source, the output sources current equal to its current limit capability and the LT3060 protects itself by thermal limiting. In this case, grounding the SHDN pin turns off the device and stops the output from sourcing current.
3060f
*Device is mounted on topside
Table 3. TS8 Package, 8 Lead TSOT-23
COPPER AREA TOPSIDE* BACKSIDE (mm2) (mm2) 2500 1000 225 100 50 2500 2500 2500 2500 2500 BOARD AREA (mm2) 2500 2500 2500 2500 2500 THERMAL RESISTANCE (JUNCTION-TO-AMBIENT) 57C/W 58C/W 59C/W 63C/W 67C/W
*Device is mounted on topside
Calculating Junction Temperature Example: Given an output voltage of 2.5V, an input voltage range of 12V 5%, an output current range of 0mA to 50mA and a maximum ambient temperature of 85C, what will the maximum junction temperature be? The power dissipated by the device equals: IOUT(MAX) * (VIN(MAX)-VOUT) + IGND * VIN(MAX) where, IOUT(MAX) = 50mA VIN(MAX) = 12.6V IGND at (IOUT = 50mA, VIN = 12.6V) = 0.6mA So, P = 50mA * (12.6V - 2.5V) + 0.6mA * 12.6V = 0.513W Using a DFN package, the thermal resistance ranges from 48C/W to 60C/W depending on the copper area with no thermal vias. So the junction temperature rise above ambient approximately equals: 0.513W * 54C/W = 27.8C
15
LT3060 APPLICATIONS INFORMATION
REVERSE OUTPUT CURRENT (mA)
The LT3060 incurs no damage if the ADJ pin is pulled above or below ground by less than 50V. If the input is left open-circuit or grounded, the ADJ pin performs like a large resistor (typically 30k) in series with a diode when pulled below ground and like 30k in series with two diodes when pulled above ground. In circuits where a backup battery is required, several different input/output conditions can occur. The output voltage may be held up while the input is either pulled to ground, pulled to some intermediate voltage or left opencircuit. Current flow back into the output follows the curve shown in Figure 7. If the LT3060's IN pin is forced below the OUT pin or the OUT pin is pulled above the IN pin, input current typically drops to less than 1A. This occurs if the LT3060 input is connected to a discharged (low voltage) battery and either a backup battery or a second regulator holds up the output. The state of the SHDN pin has no effect on the reverse current if the output is pulled above the input.
2.0
TJ = 25C 1.8 VIN = 0V CURRENT FLOWS 1.6 INTO OUT PIN 1.4 VOUT = VADJ 1.2 1.0 0.8 0.6 0.4 0.2 0 0 5 10 15 20 25 30 35 OUTPUT VOLTAGE (V) 40 45 OUT ADJ
3060 F07
Figure 7. Reverse Output Current
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16
LT3060 TYPICAL APPLICATION
Paralleling of Regulators for Higher Output Current
R1 0.15 IN VIN > 2.9V OUT LT3060 SHDN ADJ 2.5V 200mA
+
C1 2.2F
R8 1.91k 1% R9 604 1%
C2 4.7F
GND REF/BYP C3 1nF R2 0.15 IN OUT LT3060 SHDN SHDN ADJ
R6 1.74k 1% R7 604 1%
GND REF/BYP C4 1nF
R3 200
R4 200 3
+ -
7 6 LT1637
R5 1k
2
4
C5 10nF
3060 TA03
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17
LT3060 PACKAGE DESCRIPTION
DC Package 8-Lead Plastic DFN (2mm x 2mm)
(Reference LTC DWG # 05-08-1719 Rev O)
0.70 0.05 2.55 0.05 1.15 0.05 0.64 0.05 (2 SIDES) PACKAGE OUTLINE
0.25 0.05 0.45 BSC 1.37 0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED
R = 0.05 TYP 2.00 0.10 (4 SIDES)
R = 0.115 TYP 5
8 0.40 0.10 PIN 1 NOTCH R = 0.20 OR 0.25 45 CHAMFER
(DC8) DFN 0106 REVO
PIN 1 BAR TOP MARK (SEE NOTE 6)
0.64 0.10 (2 SIDES)
4 0.200 REF 0.75 0.05 1.37 0.10 (2 SIDES) 0.00 - 0.05
1 0.23 0.05 0.45 BSC
BOTTOM VIEW--EXPOSED PAD
NOTE: 1. DRAWING IS NOT A JEDEC PACKAGE OUTLINE 2. DRAWING NOT TO SCALE 3. ALL DIMENSIONS ARE IN MILLIMETERS 4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE 5. EXPOSED PAD SHALL BE SOLDER PLATED 6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE TOP AND BOTTOM OF PACKAGE
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18
LT3060 PACKAGE DESCRIPTION
TS8 Package 8-Lead Plastic TSOT-23
(Reference LTC DWG # 05-08-1637)
0.52 MAX
0.65 REF
2.90 BSC (NOTE 4)
1.22 REF
3.85 MAX 2.62 REF
1.4 MIN
2.80 BSC
1.50 - 1.75 (NOTE 4) PIN ONE ID
RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR
0.65 BSC
0.22 - 0.36 8 PLCS (NOTE 3)
0.80 - 0.90 0.20 BSC 1.00 MAX DATUM `A' 0.01 - 0.10
0.30 - 0.50 REF
NOTE: 1. DIMENSIONS ARE IN MILLIMETERS 2. DRAWING NOT TO SCALE 3. DIMENSIONS ARE INCLUSIVE OF PLATING 4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR 5. MOLD FLASH SHALL NOT EXCEED 0.254mm 6. JEDEC PACKAGE REFERENCE IS MO-193
0.09 - 0.20 (NOTE 3)
1.95 BSC
TS8 TSOT-23 0802
3060f
Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
19
LT3060 RELATED PARTS
PART NUMBER LT1761 LT1762 LT1763 LT1764/A LT1962 LT1963/A LT1964 LT1965 LT3008 LT3009 LT3010 LT3011 DESCRIPTION 100mA, Low Noise LDO 150mA, Low Noise LDO 500mA, Low Noise LDO 3A, Fast Transient Response, Low Noise LDO 300mA, Low Noise LDO 1.5A Low Noise, Fast Transient Response LDO 200mA, Low Noise, Negative LDO 1.1A, Low Noise, Low Dropout Linear Regulator 20mA, 45V, 3uA Iq Micropower LDO 20mA, 3uA Iq Micropower LDO 50mA, High Voltage, Micropower LDO 50mA, High Voltage, Micropower LDO with PWRGD 250mA, 4V to 80V, Low Dropout Micropower Linear Regulator 250mA, 4V to 80V, Low Dropout Micropower Linear Regulator with PWRGD 20mA, 3V to 80V, Low Dropout Micropower Linear Regulator COMMENTS 300mV Dropout Voltage, Low Noise: 20VRMS , VIN = 1.8V to 20V, ThinSOT package 300mV Dropout Voltage, Low Noise: 20VRMS , VIN = 1.8V to 20V, MS8 package 300mV Dropout Voltage, Low Noise: 20VRMS , VIN = 1.8V to 20V, SO-8 Package 340mV Dropout Voltage, Low Noise: 40VRMS , VIN = 2.7V to 20V, TO-220 and DD Packages "A" version stable also with ceramic caps 270mV Dropout Voltage, Low Noise: 20VRMS , VIN = 1.8V to 20V, MS8 Package 340mV Dropout Voltage, Low Noise: 40VRMS , VIN = 2.5V to 20V, "A" version stable with ceramic caps, TO-220, DD, SOT-223 and SO-8 Packages 340mV Dropout Voltage, Low Noise 30VRMS , VIN = -1.8V to -20V, ThinSOT Package 290mV Dropout Voltage, Low Noise: 40VRMS , VIN: 1.8V to 20V, VOUT: 1.2V to 19.5V, stable with ceramic caps, TO-220, DDPak, MSOP and 3 x 3 DFN Packages 300mV Dropout Voltage, Low Iq: 3A, VIN = 2.0V to 45V, VOUT = 0.6V to 39.5V; ThinSOT and 2 x 2 DFN-6 packages 280mV Dropout Voltage, Low Iq: 3A, VIN = 1.6V to 20V, ThinSOT and SC-70 packages VIN: 3V to 80V, VOUT: 1.275V to 60V, VDO = 0.3V, IQ = 30A, ISD < 1A, Low Noise: <100VRMS, Stable with 1F Output Capacitor, Exposed MS8 Package VIN: 3V to 80V, VOUT: 1.275V to 60V, VDO = 0.3V, IQ = 46A, ISD < 1A, Low Noise: <100VRMS, PowerGood, Stable with 1F Output Capacitor, 3 x 3 DFN-10 and Exposed MS12E Packages VIN: 4V to 80V, VOUT: 1.24V to 60V, VDO = 0.4V, IQ = 40A, ISD < 1A, TSSOP-16E and 4mm x 3mm DFN-12 Packages VIN: 4V to 80V, VOUT: 1.24V to 60V, VDO = 0.4V, IQ = 65A, ISD < 1A, PowerGood feature; TSSOP-16E and 4mm x 3mm DFN-12 Packages VIN: 3V to 80V (100V for 2ms, "HV" version), VOUT: 1.22V to 60V, VDO = 0.35V, IQ = 7A, ISD < 1A, ThinSOT and 3mm x 3mm DFN-8 Packages
LT3012 LT3013 LT3014/HV LT3050
100mA, Low Noise Linear Regulator with 340mV Dropout Voltage, Low Noise: 30VRMS , VIN: 1.6V to 45V, VOUT: 0.6V to 44.5V, Precision Current Limit and Diagnostic Functions. Programmable Precision Current Limit: 5%, Programmable Minimum IOUT Monitor, Output Current Monitor, Fault Indicator, Reverse Protection, 12-Lead 2mm x 3mm DFN and MSOP Packages. 1.1A, Parallelable, Low Noise, Low Dropout Linear Regulator 300mV Dropout Voltage (2-supply operation), Low Noise: 40VRMS , VIN : 1.2V to 36V, VOUT: 0V to 35.7V, current-based reference with 1-resistor VOUT set; directly parallelable (no op amp required), stable with ceramic caps, TO-220, SOT-223, MSOP and 3 x 3 DFN Packages; "-1" version has integrated internal ballast resistor Outputs May Be Paralleled for Higher Output, Current or Heat Spreading, Wide Input Voltage Range: 1.2V to 40V Low Value Input/Output Capacitors Required: 0.22F Single , Resistor Sets Output Voltage Initial Set Pin Current Accuracy: 1%, Low Output Noise: 40VRMS (10Hz to 100kHz) Reverse-Battery Protection, Reverse-Current Protection 8-Lead SOT-23, 3-Lead SOT-223 and 8-Lead 3mm x 3mm DFN Packages 275mV Dropout Voltage (2-supply operation), Low Noise: 40VRMS, VIN: 1.2V to 36V, VOUT: 0V to 35.7V, current-based reference with 1-resistor VOUT set; directly parallelable (no op amp required), stable with ceramic caps, MS8E and 2 x 3 DFN-6 packages Programmable Two-Terminal Current Source, Maximum Output Current: 200mA Wide Input Voltage Range: 1.2V to 40V, Resistor Ratio Sets Output Current Initial Set Pin Current Accuracy: 1%, Current Limit and Thermal Shutdown Protection ReverseVoltage Protection, Reverse-Current Protection 8-Lead SOT-23, 3-Lead SOT-223 and 8-Lead 3mm x 3mm DFN Packages
LT3080/-1
LT3082
200mA, Parallelable, Single Resistor, Low Dropout Linear Regulator
LT3085
500mA, Parallelable, Low Noise, Low Dropout Linear Regulator 200mA Two-Terminal Programmable Current Source
LT3092
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20 Linear Technology Corporation
(408) 432-1900 FAX: (408) 434-0507
LT 0110 * PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
www.linear.com
(c) LINEAR TECHNOLOGY CORPORATION 2010

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