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AP7361
1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE REGULATOR WITH ENABLE Description
The AP7361 is a 1A, adjustable and fixed output voltage, ultra-low dropout linear regulator with enable. The device includes pass element, error amplifier, band-gap reference, current limit and thermal shutdown circuitry. The device is turned on when EN pin is set to logic high level. The characteristics of the low dropout voltage and low quiescent current make it suitable for low to medium power applications, for example, laptop computers, audio and video applications, and battery powered devices. The typical quiescent current is approximately 70A. Built-in current-limit and thermal-shutdown functions prevent IC from damage in fault conditions. The AP7361 is available in DFN3030E-8 package.
Pin Assignments
(Top View)
OUT NC ADJ/NC GND
1 2 8 7
IN NC NC EN
GND
3 4 6 5
NEW PRODUCT
DFN3030E-8
Features
* * * * * * * * * * * * * * * Wide input voltage range: 2.2V - 6V 150mV very low dropout at 300mA load 500mV very low dropout at 1A load Low quiescent current (IQ): 70A typical Adjustable output voltage range: 1V to 5.0V Fixed output options: 1V to 3.3V Very fast transient response High PSRR Accurate voltage regulation Current limiting and short circuit protection Thermal shutdown protection Stable with ceramic output capacitor 2.2F Ambient temperature range -40C to 85 C DFN3030E-8: Available in "Green" Molding Compound (No Br, Sb) Lead Free Finish/ RoHS Compliant (Note 1)
Applications
* * * * Servers and laptops FPGA and DSP core or I/O power TV, and home electrical appliances Battery-powered devices
Note: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/products/lead_free.html
Typical Application Circuit
V IN
IN OUT
V OUT
V IN
IN OUT
V OUT
AP7361
1uF Enable 4.7uF EN GND
1uF Enable EN
AP7361
ADJ G ND
R1 4.7uF
R2
Fixed Output
Adjustable Output
AP7361
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AP7361
1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE REGULATOR WITH ENABLE Pin Descriptions
Pin Name IN OUT GND ADJ Pin Number DFN3030E-8 8 1 4 3 5 2, 6, 7 Description The input of the regulator. Bypass to ground through at least 1F ceramic capacitor. The output of the regulator. Bypass to ground through at least 2.2F ceramic capacitor. For improved ac load response a larger capacitor is recommended. Ground. Adjustable voltage version only - a resistor divider from this pin to the OUT pin and ground sets the output voltage. Enable input, active high. No connection.
NEW PRODUCT
EN NC
Functional Block Diagram
IN
Current Limit and Thermal Shutdown
OUT
IN
Current Limit and Thermal Shutdown
OUT
EN
Gate Driver
EN
R
Gate Driver
ADJ
0.8V
R
0.8V
GND
GND
Fixed Version
Adjustable Version
Absolute Maximum Ratings
Symbol ESD HBM ESD MM VIN TJ TST PD PD
Note:
Parameter Human Body Model ESD Protection Machine Model ESD Protection Input Voltage OUT, ADJ, EN Voltage Operating Junction Temperature Range Storage Temperature Range Power Dissipation (Note 2) Power Dissipation (Note 2) DFN3030E-8
Ratings >2 > 200 6.5 VIN + 0.3 -40 ~ 150 -65 ~150 Internally limited by maximum junction temperature of 150C 1700
Unit KV V V V C C
mW
2. Ratings apply to ambient temperature at 25C
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AP7361
1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE REGULATOR WITH ENABLE Recommended Operating Conditions
Symbol VIN IOUT TA
Note:
Parameter Input voltage Output Current (Note 3) Operating Ambient Temperature
Min 2.2 0 -40
Max 6.0 1.0 85
Unit V A C
3. The device maintains a stable, regulated output voltage without a load current. When the output current is large, attention should be given to the limitation of the package power dissipation.
NEW PRODUCT
Electrical Characteristics
(TA = 25oC, VIN = VOUT +1V, CIN = 1F, COUT = 4.7F, VEN = VIN, unless otherwise stated) Symbol Parameter Test Conditions VREF IADJ IQ ISHDN VOUT
VOUT VIN x VOUT
Min
Typ. 0.8 0.1 70 0.05
Max 0.5 90 1 1 2 3 0.1 0.2 1.0 1.0 200 350 700 0.3 VIN 0.1
Unit V A A A % %/V % % mV V V A A mA dB s ppm/C C C
o
FB reference voltage ADJ pin leakage Input Quiescent Current Input Shutdown Current Output Voltage Accuracy Line Regulation
IOUT = 10mA, TA = 25C Enabled, IOUT = 0A VEN = 0V, IOUT = 0A IOUT = 100mA, TA = 25C IOUT = 100mA, -40C TA 85C Over VIN, IOUT, and TA VIN = VOUT +1V to TA = 25C 6V, IOUT = 100mA -40C TA 85C IOUT from 1mA to 300mA IOUT from 1mA to 1A IOUT = 300mA IOUT = 500mA IOUT = 1A
-1 -1 -2 -3
0.5 0.01 0.5 0.5 150 250 500
VOUT / VOUT Load Regulation VDropout VIL VIH IEN ILIMIT ISHORT PSRR Dropout Voltage (Note 4) EN Input Logic Low Voltage EN Input Logic High Voltage EN Input leakage Current limit Short-circuit Current Power Supply Rejection Ratio (Note 5) Start-up Time
-1.0 -1.0
tST VOUT Output voltage temperature TA x VOUT coefficient TSHDN THYS JA
Notes:
VIN = 6V, VEN = 0V or 6V VIN = VOUT +1V VIN = VOUT +1V, Output Voltage < 25% Vout f = 1KHz, IOUT = 100mA f = 10KHz, IOUT = 100mA VOUT = 3V, COUT = 1F, RL = 30 IOUT = 100mA, -40C TA 85C
0 1.0 -0.1 1.1
0.01 1.5 200
60
65 45 200 130 150 20
Thermal shutdown threshold Thermal shutdown hysteresis Thermal Resistance Junction-toAmbient
DFN3030E-8 (Note 6)
70
C/W
4. Dropout voltage is the voltage difference between the input and the output at which the output voltage drops 2% below its nominal value. This parameter only applies to output voltages above 1.5V since minimum VIN = 2.2V. 5. For VIN 2.5V and VIN = VOUT + 1V. For VIN < 2.5V, the PSRR performance may be reduced. 6. Test condition for DFN3030E-8: Device mounted on 2"x2", FR-4 substrate PCB, with minimum recommended pad on top layer and thermal vias to bottom layer ground plane.
AP7361
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AP7361
1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE REGULATOR WITH ENABLE Typical Performance Characteristics
Start-up Time Start-up Time
VEN=0 to 2V (1V/div) VIN=4.0V CIN=COUT=1F
VEN=0 to 2V (1V/div) VIN=4.0V CIN=COUT=1F
NEW PRODUCT
VOUT=3.0V (1V/div) with 100mA load
VOUT=3.0V (1V/div) with 500mA load
Time (100s/div) Line Transient Response
Time (100s/div) Line Transient Response
VIN=4.3V to 5.3V (1V/div) Tr=Tf=5s IOUT=100mA COUT=4.7F
VIN=5.5V to 6V (1V/div) Tr=Tf=5s IOUT=100mA COUT=4.7F
VOUT=3.3V (20mV/div)
VOUT=5.0V (20mV/div)
Time (40s/div)
Time (40s/div)
AP7361
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AP7361
1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE REGULATOR WITH ENABLE Typical Performance Characteristics (Continued)
Load Transient Response
VIN=VEN=2.2V CIN=1F,COUT=4.7F
Load Transient Response
VIN=VEN=2.2V CIN=1F,COUT=4.7F VOUT=1.2V (20mV/div)
VOUT=1.2V (20mV/div)
NEW PRODUCT
IOUT=50mA to 100mA (50mA/div)
IOUT=100mA to 500mA (200mA/div)
Time (200s/div) Load Transient Response
VIN=VEN=4.3V CIN=1F,COUT=4.7F
Time (200s/div) Load Transient Response
VIN=VEN=4.3V CIN=1F,COUT=4.7F
VOUT=3.3V (20mV/div)
VOUT=3.3V (20mV/div)
IOUT=50mA to 100mA (50mA/div)
IOUT=100mA to 500mA (200mA/div)
Time (200s/div)
Time (200s/div)
AP7361
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AP7361
1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE REGULATOR WITH ENABLE Typical Performance Characteristics (Continued)
Load Transient Response VIN=VEN=6.0V CIN=1F,COUT=4.7F Load Transient Response VIN=VEN=6.0V CIN=1F,COUT=4.7F
VOUT=5.0V (20mV/div)
VOUT=5.0V (20mV/div)
NEW PRODUCT
IOUT=50mA to 100mA (50mA/div)
IOUT=100mA to 500mA (200mA/div)
Time (200s/div)
PSRR vs Frequency 100 90 80 70 PSRR(dB) 60 50 40 30 20 10
PSRR(dB) 100
Time (200s/div)
PSRR vs Frequency 90 80 70 60 50 40 30 20 10 0
IOUT=30mA
IOUT=30mA
IOUT=100mA
IOUT=100mA VIN=2.8V+0.5VppAC VOUT=1.8V COUT=4.7F TA=25C
10 0.01 100 0.1 1k 1 10k 10 100k 100 1M 1000
VIN=2.5V+0.5VppAC VOUT=1.2V COUT=4.7F TA=25C
0 10 0.01
100 0.1
1k 10k 1 10 Frequency(Hz)
100k 100
1M 1000
Frequency(Hz)
AP7361
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AP7361
1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE REGULATOR WITH ENABLE Typical Performance Characteristics (Continued)
PSRR vs Frequency 100 90 80 70 PSRR(dB)
PSRR(dB) 100 PSRR vs Frequency 90 80 70 60 50 40 30 20 10 0
IOUT=30mA
IOUT=30mA
60 50 40 30 20 10 0 10 0.01 100 0.1 1k 10k 1 10 Frequency(Hz) 100k 100 1M 1000
NEW PRODUCT
IOUT=100mA VIN=3.5V+0.5VppAC VOUT=2.5V COUT=4.7F TA=25C
IOUT=100mA VIN=4.3V+0.5VppAC VOUT=3.3V COUT=4.7F TA=25C
10 0.01
100 0.1
1k 10k 1 10 Frequency(Hz)
100k 100
1M 1000
FB Reference Voltage vs Temperature 0.82 FB Reference Voltage(V)
600
Dropout Voltage vs Output Current
VIN=4.3V IOUT=100mA
0.81
Dropout Voltage(mV)
VOUT=3.3V
500
25C
400
85C
300 200 100
0.80
-40C
0.79
0.78 -50 -25 0 25 50 75 Temperature( ) 100 125
0 0 200 400 600 800 1000 Output Current(mA)
AP7361
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AP7361
1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE REGULATOR WITH ENABLE Typical Performance Characteristics (Continued)
Current limit vs Input Voltage 2.5
Current limit vs Temperature 2.5
2.0 Current limit(A)
2.0 Current limit(A)
1.5
1.5 1.0
NEW PRODUCT
1.0
VOUT=1.2V
0.5
VIN=2.2V VOUT=1.2V
0.5
0.0 2 3 4 Input Voltage(V) 5 6
0.0 -50 -25 0 25 50 75 100 125 Temperature( )
Current limit vs Temperature 2.5 2.0 Current limit(A) 1.5 1.0 0.5 0.0 -50 -25 0 25 50 75 100 125 Temperature( )
Short-circuit current (mA) 300 250 200 150 100
Short-circuit current vs Temperature
VIN=4.3V VOUT=3.3V
VIN=4.3V
50 0 -50 -25 0 25 50 75 100 125 Temperature( )
AP7361
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AP7361
1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE REGULATOR WITH ENABLE Typical Performance Characteristics (Continued)
Load Regulation 0.9 0.6 Output Variation(%) 0.3 0.0 -0.3 -0.6 -0.9 0 200 400 600 800 1000 Output Current(mA)
-0.2 4 4.5 5 Input Voltage(V) 5.5 6 0.2 Line Regulation
VIN=VEN=4.3V VOUT=3.3V
Output Variation(%/V)
VOUT=3.3V IOUT=100mA 85C 25C
0.1
85C
0.0
NEW PRODUCT
-40C
-0.1
25C
-40C
Input Quiescent Current vs Temperature 80 Input Quiescent Current(A)
Input Quiescent Current vs Input Voltage 80 Input Quiescent Current(A)
60
60
40
40
20
VIN=VEN=4.3V IOUT=0mA
20
TA=25C IOUT=0mA
0 -50 -25 0 25 50 75 Temperature( ) 100 125
0 4 4.5 5 5.5 Input Voltage(V) 6
AP7361
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AP7361
1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE REGULATOR WITH ENABLE Application Information
Input Capacitor
A 1F ceramic capacitor is recommended between IN and GND pins to decouple input power supply glitch and noise. The amount of the capacitance may be increased without limit. This input capacitor must be located as close as possible to the device to assure input stability and reduce noise. For PCB layout, a wide copper trace is required for both IN and GND pins. A lower ESR capacitor type allows the use of less capacitance, while higher ESR type requires more capacitance.
Adjustable Operation
The AP7361 provides output voltage from 0.8V to 5.0V through external resistor divider as shown below.
V IN
IN O UT
V OU T
AP7361
1uF Enable EN G ND ADJ
R1 4.7uF
NEW PRODUCT
Output Capacitor
The output capacitor is required to stabilize and improve the transient response of the LDO. The AP7361 is stable with very small ceramic output capacitors. Using a ceramic capacitor value that is at least 2.2F with 10m ESR 300m on the output ensures stability. Higher capacitance values help to improve line and load transient response. The output capacitance may be increased to keep low undershoot and overshoot. Output capacitor must be placed as close as possible to OUT and GND pins.
Adjustable Output
R2
The output voltage is calculated by:
R VOUT = VREF 1 + 1 R 2
Where VREF=0.8V (the internal reference voltage) Rearranging the equation will give the following that is used for adjusting the output to a particular voltage:
V R1 = R2 OUT - 1 V REF
To maintain the stability of the internal reference voltage, R2 need to be kept smaller than 80k.
No Load Stability
Other than external resistor divider, no minimum load is required to keep the device stable. The device will remain stable and regulated in no load condition.
ON/OFF Input Operation
The AP7361 is turned on by setting the EN pin high, and is turned off by pulling it low. If this feature is not used, the EN pin should be tied to IN pin to keep the regulator output on at all time. To ensure proper operation, the signal source used to drive the EN pin must be able to swing above and below the specified turn-on/off voltage thresholds listed in the Electrical Characteristics section under VIL and VIH.
AP7361
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AP7361
1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE REGULATOR WITH ENABLE Application Information (Continued)
Current Limit Protection
When output current at OUT pin is higher than current limit threshold, the current limit protection will be triggered and clamp the output current to prevent over-current and to protect the regulator from damage due to overheating.
Ultra Fast Start-up
After enabled, the AP7361 is able to provide full power in as little as tens of microseconds, typically 200s, without sacrificing low ground current. This feature will help load circuitry move in and out of standby mode in real time, eventually extend battery life for mobile phones and other portable devices.
Short Circuit Protection
When OUT pin is short-circuit to GND, short circuit protection will be triggered and clamp the output current to approximately 200mA. Full current is restored when the output voltage exceeds 25% of Vout. This feature protects the regulator from over-current and damage due to overheating.
Low Quiescent Current
The AP7361, consuming only around 70A for all input range, provides great power saving in portable and low power applications.
NEW PRODUCT
Power Dissipation Thermal Shutdown Protection
Thermal protection disables the output when the junction temperature rises to approximately +150C, allowing the device to cool down. When the junction temperature reduces to approximately +130C the output circuitry is enabled again. Depending on power dissipation, thermal resistance, and ambient temperature, the thermal protection circuit may cycle on and off. This cycling limits the heat dissipation of the regulator, protecting it from damage due to overheating. The device power dissipation and proper sizing of the thermal plane that is connected to the thermal pad is critical to avoid thermal shutdown and ensure reliable operation. Power dissipation of the device depends on input voltage and load conditions and can be calculated by: PD = (VIN - VOUT) X IOUT The maximum power dissipation, handled by the device, depends on the maximum junction to ambient thermal resistance, maximum ambient temperature, and maximum device junction temperature, which can be calculated by the equation in the following:
PD (max@ TA ) =
( +150C - TA ) R JA
AP7361
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AP7361
1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE REGULATOR WITH ENABLE Ordering Information
AP7361 - XX XXX - X
Output Blank : ADJ 10 : 1.0V 12 : 1.2V 15 : 1.5V 18 : 1.8V 25 : 2.5V 28 : 2.8V 33 : 3.3V
Package FGE : DFN3030E-8
Packing 7 : Tape & Reel
NEW PRODUCT
Device
Package Code
Packaging (Note 7)
AP7361-XXFGE-7
Note:
FGE
DFN3030E-8
7"/13" Tape and Reel Quantity Part Number Suffix 3000/Tape & Reel -7
7. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf.
AP7361
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AP7361
1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE REGULATOR WITH ENABLE Marking Information
(1) DFN3030E-8
( Top View ) XX YW X
NEW PRODUCT
XX : Identification Code Y : Year : 0~9 W : Week : A~Z : 1~26 week; a~z : 27~52 week; z represents 52 and 53 week X : A~Z : Internal code
Package Identification Code
Device
AP7361ADJ AP7361-10 AP7361-12 AP7361-15 AP7361-18 AP7361-25 AP7361-28 AP7361-33
DFN3030E-8 DFN3030E-8 DFN3030E-8 DFN3030E-8 DFN3030E-8 DFN3030E-8 DFN3030E-8 DFN3030E-8
PA PB PC PD PE PF PG PH
Package Outline Dimensions
(1) Package Type: DFN3030E-8
TOP MARK
0.10 C 8X0.08 C 0.57/0.63 0/0.05 0.25 A
0.15Typ.
Seating Plane
Side View
8x-0.30 C L
0.65
C
2X-
2.95/3.05
(Pin #1 ID)
B
A C L 1.60 2.35 2.75
C L 8x-0.65 C L
Pin #1
2.95/3.05
1.40/1.60
R0 .20
Land Pattern Recommendation (Unit: mm)
2X0.25 B 0.30/0.60 8X0.65Typ. 0.20/0.30 0.10 CAB
Top View Bottom View
AP7361
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AP7361
1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE REGULATOR WITH ENABLE Taping Orientation (Note 9)
For DFN3030E-8
NEW PRODUCT
Note:
9. The taping orientation of the other package type can be found on our website at http://www.diodes.com/datasheets/ap02007.pdf
.
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AP7361
1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE REGULATOR WITH ENABLE
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NEW PRODUCT
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