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SPX3819 500mA, Low-Noise LDO Voltage Regulator

FEATURES
Low Noise: 40V Possible High Accuracy: 1% Reverse Battery Protection Low Dropout: 340mV at Full Load Low Quiescent Current: 90A Zero Off-Mode Current Fixed Output: 1.2V, 1.5V, 1.8V, 2.5V, 3.0V, 3.1V, 3.3V, 5.0V. Adj. Output also available. Available in RoHS Compliant, Lead Free Packages: 5 Pin SOT-23, 8 Pin Narrow SOIC and 8 pin 2X3 DFN
EN NC VIN NC
1 2 3 4
8
ADJ/BYP GND NC VOUT
SPX3819 8 Pin DFN
7 6 5
APPLICATIONS
Battery Powered Systems Cordless Phones Radio Control Systems Portable/Palm Top/Notebook Computers Portable Consumer Equipment Portable Instrumentation Bar Code Scanners SMPS Post Regulators
DESCRIPTION
The SPX3819 is a positive voltage regulator with a low dropout voltage and low noise output. In addition, this device offers a very low ground current of 800A at 100mA output. The SPX3819 has an initial tolerance of less than 1% max and a logic compatible ON/OFF switched input. When disabled, power consumption drops to nearly zero. Other key features include reverse battery protection, current limit, and thermal shutdown. The SPX3819 includes a reference bypass pin for optimal low noise output performance. With its very low output temperature coefficient, this device also makes a superior low power voltage reference. The SPX3819 is an excellent choice for use in battery-powered applications such as cordless telephones, radio control systems, and portable computers. It is available in several fixed voltages -- 1.2V, 1.5V, 1.8V, 2.5V, 3.0V, 3.1V, 3.3V, 5.0V -- or with an adjustable output. This device is offered in 8 pin NSOIC, 8 pin DFN and 5-pin SOT-23 packages.
TYPICAL APPLICATION CIRCUIT
VIN 1 5 VOUT
+ 2 + GND 3 EN ENABLE may be tied directly to VIN SPX3819
4
BYP (Opt.)
TOP View
Jun 5-07 Rev E
SPX3819 500mA, Low Noise LDO Voltage Regulator
(c) 2007 Sipex Corporation
1
ABSOLUTE MAXIMUM RATINGS
Power Dissipation ...................................................... Internally Limited Lead Temp. (Soldering, 5 Seconds) ........................................... 260C Operating Junction Temperature Range ................... -40C to +125C Input Supply Voltage ........................................................ -20V to +20V Enable Input Voltage ........................................................ -20V to +20V
RECOMMENDED OPERATING CONDITIONS
Input Voltage ................................................................... +2.5V to+16V Operating Junction Temperature Range ................... -40C to +125C Enable Input Voltage ........................................................... 0.0V to VIN
ELECTRICAL CHARACTERISTICS
TJ=25C, VOUT + 1V, for 1.2V Option VIN=VOUT + 1.2V IL=100A, CL=1F, and VENABLE 2.4V. The denotes the specifications which apply over full operating temperature range -40C to +85C, unless otherwise specified.
PARAMETER Output Voltage Tolerance Output Voltage Temperature Coef. Line Regulation Load Regulation Dropout Voltage (VIN-VO)(Note 2) MIN -1 -2 57 0.04 0.05 10 125 180 340 Quiescent Current (IGND) Ground Pin Current (IGND) 0.05 90 250 1.0 6.5 Ripple Rejection (PSRR) Current Limit (ILIMIT) Output Noise (eNO) 70 800 950 300 40 Input Voltage Level Logic Low (VIL) Input Voltage Level Logic High (VIH) ENABLE Input Current Thermal Resistance (Note 1) 2 0.01 3 191 128.4 59 2 20 0.4 VRMS VRMS V V A C/W C/W C/W 0.1 0.4 60 80 175 250 350 450 550 700 3 8 150 190 650 900 2.0 2.5 25.0 30.0 TYP MAX +1 +2 UNITS % ppm/C %/V % mV mV mV mV A A A mA mA dB mA IL=10mA, CL=1.0F, CIN=1F, (10Hz-100kHz) IL=10mA, CL=10F, CBYP =1F, CIN =1F, (10Hz-100kHz) OFF ON VIL 0.4V VIH 2.0V SOT-23-5 / Junction to Ambient NSOIC-8 / Junction to Ambient DFN-8 / Junction to Ambient VOUT = 0.0V IL = 500mA IL = 150mA IL = 50mA VENABLE 0.4V VENABLE 0.25V IL = 100A IL = 500mA IL = 150mA IL = 50mA VIN=VOUT + 1V to 16V IL = 0.1mA to 500mA IL = 100A CONDITIONS
NOTES Note 1: The maximum allowable power dissipation is a function of maximum operating junction temperature, TJ(max) the junction to ambient thermal resistance, and the ambient JA, and the ambient temperature TA. The maximum allowable power dissipation at any ambient temperature is given: PD(max) = (TJ(max)-TA)/JA, exceeding the maximum allowable power limit will result in excessive die temperature; thus, the regulator will go into thermal shutdown. The JA of the SPX3819 is 220C/W mounted on a PC board. Note 2: Not applicable to output voltage 2V or less.
Jun 5-07 Rev E
SPX3819 500mA, Low Noise LDO Voltage Regulator
(c) 2007 Sipex Corporation
2
TYPICAL PERFORMANCE CHARACTERISTICS
7.0 3.3V Device VIN= 4.3V CL = 1.0F
160 150 140 130
6.0
5.0
IGND (mA)
4.0
120 100
3.0
IGND (A)
90 80 70 60 4 3.3V Device CL= 1.0F IL = 100A
2.0
1.0
0.0 0 100 200 300 400 500
6
8
10
12
14
16
IL (mA)
VIN (V)
Ground Current vs Load Current
Ground Current vs Input Voltage
14.0 3.3V Device VIN= 4.3V CL = 1.0F
3.350 3.345 3.340 3.335 3.330
12.0 10.0
IGND (mA)
VOUT (V)
8.0
3.325 3.320 3.315
3.310
6.0
4.0
3.305
3.300
3.3V Device CL= 1.0F IL = 100A
2.0
3.295 3.290
0.0 0 100 200 300 400 500
4
6
8
10
12
14
16
IL (mA)
VIN (V)
Ground Current vs Load Current in Dropout
Output Voltage vs Input Voltage
Jun 5-07 Rev E
SPX3819 500mA, Low Noise LDO Voltage Regulator
(c) 2007 Sipex Corporation
3
TYPICAL PERFORMANCE CHARACTERISTICS: Continued
350 300 3.3V Device CL = 1.0F
3.316 3.314
3.3V Device VIN= 4.3V CL = 1.0F
Dropout (mV)
250 200
3.312
3.310
V OUT (V)
3.308
3.306
150 100
3.304
50
3.302
0 0 100 200 300 400 500
3.300
0 100 200 300 400 500
IL (mA)
Dropout Voltage vs Load Current
IL (mA)
Output Voltage vs Load Current
130 3.3V Device VIN= 4.3F CL= 1.0F IL = 100A
360 3.3V Device VIN = 4.3 CL= 1.0F IL = 50mA
120
340
320
110
IGND (A)
300
100
IGND (A)
280
260
90
240
80
220
70 -40 -20 0 20 40 60 80 100 120
200 -40 -20 0 20 40 60 80 100 120
Temperature (C)
Temperature (C)
Ground Current vs Temperature with 100A Load
Ground Current vs Temperature with 50mA Load
Jun 5-07 Rev E
SPX3819 500mA, Low Noise LDO Voltage Regulator
(c) 2007 Sipex Corporation
4
TYPICAL PERFORMANCE CHARACTERISTICS: Continued
8.0
14.0 3.3V Device VIN= 4.3F CL= 1.0F IL = 500mA
7.5
3.3V Device VIN= 4.3F CL= 1.0F IL = 500mA
13.5
13.0
IGND (mA)
-40 -20 0 20 40 60 80 100 120
IGND (mA)
12.5
7.0
12.0
11.5
6.5
11.0
6.0
10.5 -40 -20 0 20 40 60 80 100 120
Temperature (C)
Temperature (C)
Ground Current vs Temperature with 500mA Load
Ground Current vs Temperature in Dropout
1.30 3.3V Device CL= 1.0F IL = 100A 1.25
3.400 3.380 3.360 3.340 3.3V Device VIN= 4.3F CL= 1.0F IL = 500mA
VEN, On Threshold (V)
1.20
VOUT (V)
3.320 3.300 2.280
1.15
1.10
2.260 2.240
1.05
2.220 2.200
4 6 8 10 12 14 16
1.00
-40
-20
0
20
40
60
80
100
120
VIN (V)
Temperature (C)
ENABLE Voltage, ON threshold, vs Input Voltage
Output Voltage vs Temperature
Jun 5-07 Rev E
SPX3819 500mA, Low Noise LDO Voltage Regulator
(c) 2007 Sipex Corporation
5
TYPICAL PERFORMANCE CHARACTERISTICS: Continued
350 Cin = 1uFT, Cout = 1uFT Cin = 1uFT, Cout = 2.2uFT Cin = 1uFT Cout = 10uFT
300 250 200
uV RMS
150
100
50
0 1 10 100 1000 10000 Bypass Cap (pF) 100000 1000000
Output Noise vs Bypass Capacitor Value IL = 10mA, 10Hz - 100kHz
Line Transient Response for 3.3V Device
Load Transient Response for 3.3V Device
Jun 5-07 Rev E
SPX3819 500mA, Low Noise LDO Voltage Regulator
(c) 2007 Sipex Corporation
6
APPLICATION INFORMATION The SPX3819 requires an output capacitor for device stability. Its value depends upon the application circuit. In general, linear regulator stability decreases with higher output currents. In applications where the SPX3819 is sourcing less current, a lower output capacitance may be sufficient. For example, a regulator outputting only 10mA, requires approximately half the capacitance as the same regulator sourcing 150mA. Bench testing is the best method for determining the proper type and value of the capacitor since the high frequency characteristics of electrolytic capacitors vary widely, depending on type and manufacturer. A high quality 2.2F aluminum electrolytic capacitor works in most application circuits, but the same stability often can be obtained with a 1F tantalum electrolytic. With the SPX3819 adjustable version, the minimum value of output capacitance is a function of the output voltage. The value decreases with higher output voltages, since closed loop gain is increased.
Typical Applications Circuits
concern. The SPX3819 start-up speed is inversely proportional to the size of the BYP capacitor. Applications requiring a slow rampup of the output voltage should use a larger CBYP. However, if a rapid turn-on is necessary, the BYP capacitor can be omitted. The SPX3819's internal reference is available through the BYP pin. Figure 1 represents a SPX3819 standard application circuit. The EN (enable) pin is pulled high (>2.0V) to enable the regulator. To disable the regulator, EN < 0.4V. The SPX3819 in Figure 2 illustrates a typical adjustable output voltage configuration. Two resistors (R1 and R2) set the output voltage. The output voltage is calculated using the formula: VOUT = 1.235V x [ 1 + R1/R2] R2 must be > 10 k and for best results, R2 should be between 22 k and 47k.
A 10nF capacitor on the BYP pin will significantly reduce output noise, but it may be left unconnected if the output noise is not a major
VIN
1
5
VOUT
VIN
1
5
VOUT
+ 2 + GND 3 EN ENABLE may be tied directly to VIN SPX3819
+ GND
2 SPX3819 SOT-23 3 4
R1
+
4
BYP (Opt.)
EN Hi-ON Lo-OFF R2
TOP View
TOP View
Figure 1. Standard Application Circuit
Figure 2. Typical Adjustable Output Voltage Configuration
Jun 5-07 Rev E
SPX3819 500mA, Low Noise LDO Voltage Regulator
(c) 2007 Sipex Corporation
7
PACKAGE: PIN DESCRIPTION
Pin # nSOIC 2 5-8 3 1
Pin # DFN 3 7 5 1
Pin # SOT-3 1 2 5 3
Pin Name VIN GND VOUT EN
Description Supply Input Ground Regulator Output Enable(input). CMOS compatible control input. Logic high = enable; logic low or open = shutdown Adjust(input). Feedback input. Connect to resistive voltage-divider network No Connect
4
8
4
ADJ/BYP
-
4, 6
-
NC
PACKAGE: PINOUTS
EN NC VIN NC
1 2 3 4
8
ADJ/BYP GND NC
EN 1
8 GND
SPX3819 8 Pin DFN
7 6 5
VIN 2
SPX3819 8 Pin nSOIC
7 GND
VOUT 3
6 GND 5 GND
VOUT
ADJ/BYP 4
Note: The bottom exposed pad for the SPX3819 DFN package is connected to GND.
VOUT 5
ADJ/BYP 4
SPX3819 5 Pin SOT-23
1 VIN 2 GND 3 EN
Jun 5-07 Rev E
SPX3819 500mA, Low Noise LDO Voltage Regulator
(c) 2007 Sipex Corporation
8
ORDERING INFORMATION
Part Number
SPX3819S-L/TR SPX3819S-L-1-8/TR SPX3819S-L-2-5/TR SPX3819S-L-3-0/TR SPX3819S-L-3-1/TR SPX3819S-L-3-3/TR SPX3819S-L-5-0/TR SPX3819S-L SPX3819S-L-1-8 SPX3819S-L-2-5 SPX3819S-L-3-0 SPX3819S-L-3-1 SPX3819S-L-3-3 SPX3819S-L-5-0 SPX3819M5-L SPX3819M5-L-1-2 SPX3819M5-L-1-5 SPX3819M5-L-1-8 SPX3819M5-L-2-5 SPX3819M5-L-3-0 SPX3819M5-L-3-1 SPX3819M5-L-3-3 SPX3819M5-L-5-0 SPX3819M5-L/TR SPX3819M5-L-1-2/TR SPX3819M5-L-1-5/TR SPX3819M5-L-1-8/TR SPX3819M5-L-2-5/TR SPX3819M5-L-3-0/TR SPX3819M5-L-3-1/TR SPX3819M5-L-3-3/TR SPX3819M5-L-5-0/TR SPX3819R2-L-1-2 SPX3819R2-L-1-2/TR SPX3819S-L-1-2/TR SPX3819S-L-1-5/TR SPX3819S-L-1-2 SPX3819S-L-1-5
Accuracy
MSL Level
L1 @ 260C L1 @ 260C L1 @ 260C L1 @ 260C L1 @ 260C L1 @ 260C L1 @ 260C L1 @ 260C L1 @ 260C L1 @ 260C L1 @ 260C L1 @ 260C L1 @ 260C L1 @ 260C L1 @ 260C L1 @ 260C L1 @ 260C L1 @ 260C L1 @ 260C L1 @ 260C L1 @ 260C L1 @ 260C L1 @ 260C L1 @ 260C L1 @ 260C L1 @ 260C L1 @ 260C L1 @ 260C L1 @ 260C L1 @ 260C L1 @ 260C L1 @ 260C L1 @ 250C L1 @ 250C L1 @ 260C L1 @ 260C L1 @ 260C L1 @ 260C
Status
Active Active Active Active Active Active Active Active Active Active Active Active Active Active Active Active Active Active Active Active Active Active Active Active Active Active Active Active Active Active Active Active CF CF CF CF CF CF
Package
NSOIC8 NSOIC8 NSOIC8 NSOIC8 NSOIC8 NSOIC8 NSOIC8 NSOIC8 NSOIC8 NSOIC8 NSOIC8 NSOIC8 NSOIC8 NSOIC8 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 DFN8 DFN8 SOIC-8 SOIC-8 SOIC-8 SOIC-8
Pack Type
Tape & Reel Tape & Reel Tape & Reel Tape & Reel Tape & Reel Tape & Reel Tape & Reel TUBE TUBE TUBE TUBE TUBE TUBE TUBE Not in Bulk Not in Bulk Not in Bulk Not in Bulk Not in Bulk Not in Bulk Not in Bulk Not in Bulk Not in Bulk Tape & Reel Tape & Reel Tape & Reel Tape & Reel Tape & Reel Tape & Reel Tape & Reel Tape & Reel Tape & Reel Not in Bulk Tape & Reel Tape & Reel Tape & Reel TUBE TUBE
Quantity 2500 2500 2500 2500 2500 2500 2500 98 98 98 98 98 98 98 2500 2500 2500 2500 2500 2500 2500 2500 2500 2500 2500 2500 2500 2500 2500 2500 2500 2500 3000 3000 2500 2500 98 98
RoHS
Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes
0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01
ORDERING INFORMATION
Part Number
SPX3819R2-L SPX3819R2-L-1-5 SPX3819R2-L-1-8 SPX3819R2-L-3-3 SPX3819R2-L-5-0 SPX3819R2-1-2 SPX3819R2-3-3 SPX3819R2-1-2/TR SPX3819S/TR SPX3819S-2-5/TR SPX3819S SPX3819S-2-5 SPX3819S-3-3/TR SPX3819S-1-8 SPX3819S-3-3 SPX3819S-5-0 SPX3819M5 SPX3819M5-1-2 SPX3819M5-1-5 SPX3819M5-1-8 SPX3819M5-2-5 SPX3819M5-3-0 SPX3819M5-3-1 SPX3819M5-3-3 SPX3819M5-5-0 SPX3819M5/TR SPX3819M5-1-2/TR SPX3819M5-1-5/TR SPX3819M5-1-8/TR SPX3819M5-2-5/TR SPX3819M5-3-0/TR SPX3819M5-3-3/TR SPX3819M5-5-0/TR
Accuracy
MSL Level
L1 @ 250C L1 @ 250C L1 @ 250C L1 @ 250C L1 @ 250C L1 @ 240C L1 @ 240C L1 @ 240C L1 @ 240C L1 @ 240C L1 @ 240C L1 @ 240C L1 @ 240C L1 @ 240C L1 @ 240C L1 @ 240C L1 @ 240C L1 @ 240C L1 @ 240C L1 @ 240C L1 @ 240C L1 @ 240C L1 @ 240C L1 @ 240C L1 @ 240C L1 @ 240C L1 @ 240C L1 @ 240C L1 @ 240C L1 @ 240C L1 @ 240C L1 @ 240C L1 @ 240C
Status
EOL EOL EOL EOL EOL EOL EOL EOL EOL EOL EOL EOL EOL EOL EOL EOL EOL EOL EOL EOL EOL EOL EOL EOL EOL EOL EOL EOL EOL EOL EOL EOL EOL
Package
DFN8 DFN8 DFN8 DFN8 DFN8 DFN8 DFN8 DFN8 NSOIC8 NSOIC8 NSOIC8 NSOIC8 SOIC-8 SOIC-8 SOIC-8 SOIC-8 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5
Pack Type
Not in Bulk Not in Bulk Not in Bulk Not in Bulk Not in Bulk Not in Bulk Not in Bulk Tape & Reel Tape & Reel Tape & Reel TUBE TUBE Tape & Reel TUBE TUBE TUBE Not in Bulk Not in Bulk Not in Bulk Not in Bulk Not in Bulk Not in Bulk Not in Bulk Not in Bulk Not in Bulk Tape & Reel Tape & Reel Tape & Reel Tape & Reel Tape & Reel Tape & Reel Tape & Reel Tape & Reel
Quantity 3000 3000 3000 3000 3000 3000 3000 3000 2500 2500 98 98 2500 98 98 98 2500 2500 2500 2500 2500 2500 2500 2500 2500 2500 2500 2500 2500 2500 2500 2500 2500
RoHS
Yes Yes Yes Yes Yes No No No No No No No No No No No No No No No No No No No No No No No No No No No No
0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01
For further assistance: Email: WWW Support page: Sipex Application Notes: Sipexsupport@sipex.com http://www.sipex.com/content.aspx?p=support http://www.sipex.com/applicationNotes.aspx
Solved by
TM
Sipex Corporation Headquarters and Sales Office 233 South Hillview Drive Milpitas, CA 95035 tel: (408) 934-7500 fax: (408) 935-7600
Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others.

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