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SPX29150/51/52/53 1.5A Low Dropout Voltage Regulator
FEATURES Adjustable Output Down to 1.25V 1% Output Accuracy Output Current of 1.5A Low Dropout Voltage of 390mV @ 1.5A Extremely Tight Load and Line Regulation Extremely Fast Transient Response Reverse-Battery Protection Zero Current Shutdown (5 pin version) Error Flag Signal Output for Out of Regulation State (5 pin version) Standard TO-220 and TO-263 Packages APPLICATIONS Powering VGA and Sound Cards LCD Monitors USB Power Supplies PowerPCTM Supplies SMPS Post Regulators High-efficiency "Green" Computer Systems High-efficiency Linear Power Supplies Portable Instrumentation Constant Current Regulators Adjustable Power Supplies Battery Chargers
DESCRIPTION The SPX29150/51/52/53 are 1.5A, highly accurate voltage regulators with a low dropout voltage of 390mV (typical) @ 1.5A. These regulators are specifically designed for low voltage applications that require a low dropout voltage and a fast transient response. They are fully fault protected against over-current, reverse battery, and positive and negative voltage transients. On-chip trimming adjusts the reference voltage to 1% initial accuracy. Other features in the 5 pin versions include Enable and Error Flag. The SPX29150/51/52/53 is offered in 3-pin and 5-pin TO-220 & TO-263 packages. For a 3A version, refer to the SPX29300 data sheet. TYPICAL APPLICATION CIRCUITS VIN
+ 6.8 F 1 SPX29150 3 2 + 10 F
VOUT
VIN + 6.8 F
1 SPX29152 4 2 GND R2 3 5 ADJ
VOUT + R1 10 F
Figure 1. Fixed Output Linear Regulator
REV B 06/05/08
Figure 2. Adjustable Output Linear Regulator
(c) Copyright 2008 Exar Corporation
SP29150/51/52/53 1.5A Low Dropout Voltage Regulator
1
ABSOLUTE MAXIMUM RATINGS
Storage Temperature Range........................-65C to +150C Operating Junction Temperature Range......-40C to +125C Input Voltage (Note 7)......................................................16V
at VIN=VOUT + 1V and IOUT = 10mA, CIN = 6.8F, COUT = 10F, TA = 25C, unless otherwise specified. The Boldface applies over the junction temperature range. Adjustable versions are set to 5.0V. SPX29150/51 PARAMETER CONDITIONS Typ Units Min Max 1.8V Version IOUT = 10mA 1.8 1.782 1.818 Output Voltage V 10mA IOUT 1.5A, 2.5V VIN 16V 1.8 1.764 1.836 2.5V Version IOUT = 10mA 2.5 2.475 2.525 Output Voltage V 10mA IOUT1.5A, 3.5VVIN 16V I 1.5A, V 16V V 2.5 2.450 2.550 3.3V Version IOUT = 10mA 3.3 3.267 3.333 Output Voltage V 10mA IOUT1.5A, 4.3VVIN 16V I 1.5A, V 16V V 3.3 3.234 3.366 5.0V Version IOUT = 10mA 5.0 4.950 5.050 Output Voltage V 10mA IOUT1.5A, 6.0VVIN 16V I 1.5A, V 16V V 5.0 4.900 5.100 All Voltage Options SPX29150/51/52/53 Line Regulation IO = 10mA, (VOUT + 1V) V 16V VIN 16V 0.1 0.5 % VIN = VOUT + 1V, 10mA IOUT IFULLLoad Regulation 0.2 1 %
LOAD
ELECTRICAL CHARACTERISTICS
V T Dropout Voltage (Note 1) (except 1.8V version) Ground Current (Note 3) IGNDDO Ground Pin Current at Dropout Current Limit Output Noise Voltage (10Hz to 100kHz) IL = 100mA Reference Voltage
Output Voltage Temperature Coefficient IO = 100mA IO = 750mA IO = 1.5A IO = 750mA, VIN = VOUT, +1V IO = 1.5A VIN = 0.1V less than specified VOUT IOUT = 10mA VOUT = 0.0V (Note 2) CL = 10F CL = 33F Adjustable version only
13 70 230 390 12 45 0.9 2.2 400 260 1.240 1.228 1.215 1.203 1.7
100 200
ppm/C
mV 600 25 mA mA A VRMS 1.252 1.265 1.277 80 120 V
Reference Voltage Adjustable version only (Note 8) Adjust Pin Bias Current Reference Voltage Temperature (Note 4) Coefficient Adjust Pin Bias Current Temperature Coefficient Flag Output (Error Comparator) SPX29151/53 Output Leakage Current Output Low Voltage
Rev B 06/05/08
40 13
nA ppm/C
0.1
nA/C
VOH=16V Device set for 5V, VIN=4.5V, IOL=250A
0.1 200
1.00 2.00 300 400
UA mV
SP29150/51/52/53 1.5A Low Dropout Voltage Regulator
(c) Copyright 2008 Exar Corporation
2
ELECTRICAL CHARACTERISTICS CONT'D
PARAMETER Upper Threshold Voltage Lower Threshold Voltage Hysteresis ENABLE input SPX29151/52 Input Logic Voltage Low (OFF) High (ON) Enable Input Pin Input Current VIN < 10V VEN=16V VEN=0.8V Regulator Output Current in Shutdown (Note 6) TO-220 Junction to Case, at Tab TO-220 Junction to Ambient Thermal Resistance TO-263 Junction to Case, at Tab TO-263 Junction to Ambient 100 CONDITIONS Device set for 5V (Note 5) Device set for 5V (Note 5) Device set for 5V (Note 5) Typ 60 75 15 SPX29150/51 Min Max 40 25 95 140 Units mV mV mV
2.4V
0.8 600 750 1 2
V A A A
10 3 30 3 32
500
C/W
NOTES: Note 1: Dropout voltage is defined as the input to output differential when the output voltage drops to 99% of its nominal value. Note 2: VIN = VOUT (NOMINAL) +1V. For example, use VIN = 4.3V for a 3.3V regulator. Employ pulse-testing procedures to minimize temperature rise. Note 3: Ground pin current is the regulator quiescent current. The total current drawn from the source is the sum of the load current to the ground current. Note 4: Thermal regulation is defined as the change in the output voltage at a time T after a change in power dissipation is applied, excluding load or line regulation effects. Note 5: Comparator threshold is expressed in terms of a voltage differential at the Adjust terminal below the nominal reference voltage measured 6V input. To express these thresholds in terms of output voltage change, multiply the error amplifier gain = VOUT/VREF = (R1 + R2)/R2. For example, at a programmable output voltage of 5V, the Error output is guaranteed to go low when the output drops by 95mVx 5V/ 1.240V = 38mV. Thresholds remain constant as a percent of VOUT as VOUT is varied, with the dropout warning occurring at typically 5% below nominal, 7.7% guaranteed. Note 6: VEN 0.8V and VIN 16V, VOUT = 0. Note 7: Maximum positive supply voltage of 20V must be of limited duration (<100m_) < 1%. The maximum continuous supply voltage is 16V. Note 8: VREF VOUT (VIN-1), 2.5VVIN 16V, 10mA IL IFL, TJ < TJMAX.
BLOCK DIAGRAM
OUT
IN O.v I LIMIT FLAG + 1.180v Reference 1.240v + 28v R1*
ADJ EN Thermal shutdown
R2*
GND
REV B 06/05/08
SP29150/51/52/53 1.5A Low Dropout Voltage Regulator
(c) Copyright 2008 Exar Corporation
3
TYPICAL PERFORMANCE CHARACTERISTICS
3.310 3.305 3.300 3.295 3.290
3.3V Device IL = 10mA CL = 10uF
3.320 3.315 3.310
Vout (V)
3.305 3.300 3.295 3.290 3.285 3.280 4 6 8 10 Vin (V) 12 14 16
Vout (V )
3.285 3.280
3.3V Device Vin = 4.3V CL = 10F
0
0.75
0.25
0.5
1
1.25
1.5
IL (A)
Figure 3. Line Regulation
Figure 4. Load Regulation
80.0 70.0 60.0
300 280 260
Ignd (mA)
Ignd (uA)
50.0 40.0 30.0 20.0 10.0 0.0 0 0.25 0.5 0.75 IL (A) 1 1.25 1.5
240 220 200 180 4 6 8 10 Vin (V) 12 14 16
3.3V Device IL = 10mA CL = 10uF
3.3V Device Vin = 4.3V CL = 10uF
Figure 5. Ground Current vs Load Current
Figure 6. Ground Current vs Input Voltage
600
100 90 80
500
Vdropout (mV)
Ignd (mA)
70 60 50 40 30 20 10 0 0 0.25 0.5 0.75 IL (A) 1 1.25 1.5
3.3V Device
Vin = 3.2V
400 300 200
3.3V Device
CL = 10uF
100 0 0 0.25 0.5 0.75 IL (A) 1
CL = 10uF
1.25
1.5
Figure 7. Ground Current vs Load Current in Dropout
Figure 8. Dropout Voltage vs Load Current
REV B 06/05/08
SP29150/51/52/53 1.5A Low Dropout Voltage Regulator
(c) Copyright 2008 Exar Corporation
4
TYPICAL PERFORMANCE CHARACTERISTICS
280 270 260 250
3.320 3.310 3.300 3.290
Vout
Ignd (uA)
240 230 220 210 200 190 180 -40 -20 0 20 40 60 Temperature (o C) 80 100 120
3.280 3.270 3.260 3.250 3.240 3.230 3.220 -40 -20 0 20 40 60 Temperature (o C) 80 100 120
3.3V Device Vin = 4.3V IL = 10mA CL = 10uF
3.3V Device Vin = 4.3V IL = 10mA CL = 10uF
Figure 9. Ground Current vs Temperature at ILOAD=10mA
7.00 6.80 6.60 6.40
Figure 10. Output Voltage vs Temperature at ILOAD=10mA
30 29
Ignd (mA)
6.20 6.00 5.80 5.60 5.40 5.20 5.00 -40 -20 0 20 40 60 Temperature (o C) 80
Ignd (mA)
3.3V Device Vin = 4.3V IL = 500mA CL = 10uF
28 27 26 25 24 23 22 21
3.3V Device Vin = 3.2V IL = 750mA CL = 10F
100
120
20 -40 -20 0 20 40 60 Temperature (o C) 80 100 120
Figure 11. Ground Current vs Temperature at ILOAD=500mA
52.0 50.0 48.0
Ignd (mA)
Figure 12. Ground Current vs Temperature in Dropout at ILOAD=750mA
100 95 90 Ignd (mA) 85 80 75 70 -40 -20 0 20 40 60 Temperature ( o C) 80 100 120 3.3V Device Vin = 3.2V IL = 1.5A CL = 10F
46.0 44.0 42.0 40.0 38.0 36.0 -40 -20 0 20 40 60 80 100 120 3.3V Device Vin = 4.3V IL = 1.5A CL = 10uF
Temperature (o C)
Figure 13. Ground Current vs Temperature at ILOAD=1.5A
Figure 14. Ground Current vs Temperature in Dropout at ILOAD=1.5A
REV B 06/05/08
SP29150/51/52/53 1.5A Low Dropout Voltage Regulator
(c) Copyright 2008 Exar Corporation
5
TYPICAL PERFORMANCE CHARACTERISTICS
350 330 310
500 480 460
Vdropout (mV)
Vdropout (mV)
290 270 250 230 210 190 170 150 -40 -20 0 20 40 60 Temperature (o C) 80 100 120
440 420 400 380 360 340 320 -40 -20 0 20 40 60 80
3.3V Device IL = 750mA CL = 10uF
3.3V Device IL = 750mA CL = 10uF
100 120
Temperature ( o C)
Figure 15. Dropout Voltage vs Temperature at ILOAD=750mA
Figure 16. Dropout Voltage vs Temperature at ILOAD=1.5A
35 30 25
(uA)
2.00 1.90 1.80 1.70
Vth (V)
3.3V Device
20 15 10 5 0 -40 -20 0 20 40 60
o
1.60 1.50 1.40 1.30 1.20 1.10
I EN
3.3V Device
80
100
120
1.00 -40
-20
0
20
40
60
o
80
100
120
Temperature ( C)
Temperature ( C)
Figure 17. ENABLE Current vs Temperature at VEN=16V
Figure 18. ENABLE Threshold vs Temperature
REV B 06/05/08
SP29150/51/52/53 1.5A Low Dropout Voltage Regulator
(c) Copyright 2008 Exar Corporation
6
APPLICATION INFORMATION The SPX29150/51/52/53 incorporates protection against over-current faults, reversed load insertion, over temperature operation, and positive and negative transient voltages. Thermal Considerations Although the SPX29150/51/52/53 offers limiting circuitry for overload conditions, it is still necessary to insure that the maximum junction temperature is not exceeded in the application. Heat will flow through the lowest resistance path, the junction-to-case path. In order to insure the best thermal flow of the component, proper mounting is required. Consult the heatsink manufacturer for thermal resistance and heat sink design. TO-220 Design Example: Assume that VIN = 10V, VOUT = 5V, IOUT = 1.5A, TA = 50C, H= 1C/W, CH= 2C/W, and JC= 3C/W, where: TA = ambient temperature, HA = heatsink to ambient thermal resistance CH = case to heatsink thermal resistance JC = junction to case thermal resistance The power calculated under these conditions is: PD = (VIN - VOUT) * IOUT = 7.5W. And the junction temperature is calculated as TJ = TA + PD * (HA + CH + JC) or TJ = 50 + 7.5 * (1+2+3) = 95C Reliable operation is insured. Capacitor Requirements The output capacitor is needed to insure stability and minimize the output noise. The value of the capacitor varies with the load. However, a minimum value of 10F aluminum capacitor will guarantee stability over all load conditions. A tantalum capacitor is recommended if a faster load transient response is needed. If the power source has a high AC impedance, a 0.1F ceramic capacitor between input & ground is recommended. The output capacitors maximum ESR value for stable operation is 0.33ohms. Minimum Load Current To ensure proper behavior of the regulator under light loads, a minimum load of 5mA for SPX29150/51/52/53 is required. Typical Application Circuits Figure 19 represents a typical fixed output regulator. Figure 20 represents an adjustable output regulator. The values of R1 and R2 set the output voltage value as follows: VOUT =VREF * [1 + (R1/R2)]. A minimum value of 10k is recommended for R2 with a range between 10k and 47k.
VIN
+ 6.8F
SPX29150 + 10F
VIN
1 SPX29152 2 GND 3 5
4 + R1
VOUT 10 F
VOUT
+ 6.8 F
ADJ
R2
Figure 19. Fixed Output Linear Regulator
Figure 20. Adjustable Output Linear Regulator
REV B 06/05/08
SP29150/51/52/53 1.5A Low Dropout Voltage Regulator
(c) Copyright 2008 Exar Corporation
7
PACKAGE PINOUTS
TO-263-3 Package (T)
TO-263-5 Package (T5)
SPX29 151 1 2 3 12345 1) ENABL E 2) INPUT 3) GND 4) OUTPUT 5) FLAG V IN GND V OUT
SPX29 152 1) ENABL E 2) INPUT 3) GND 4) OUTPUT 5) ADJU ST
SPX29 153 1) FLAG 2) INPUT 3) GND 4) OUTPUT 5) ADJU ST
Top View
Front View
*Tab is internally connected to GND
TO-220-3 Package (U)
TO-220-5 Package (U5)
1
2
3
SPX29 151 1) ENABL E 2) INPUT 3) GND 4) OUTPUT 5) FLAG
SPX29 152 1) ENABL E 2) INPUT 3) GND 4) OUTPUT 5) ADJU ST
SPX29 153 1) FLAG 2) INPUT 3) GND 4) OUTPUT 5) ADJU ST
V IN GND V OUT
1 234 5
Front View
Top View
REV B 06/05/08
SP29150/51/52/53 1.5A Low Dropout Voltage Regulator
(c) Copyright 2008 Exar Corporation
8
PACKAGE: 3 PIN TO-263
E A E/2 L1 C2 Seating Plane
SIDE VIEW
H D Chamfer Optional
1
2
3
c
e See Detail C
b2
b Gauge Plane
FRONT VIEW
L3 A1 L
Seating Plane
DETAIL C
Thermal Pad (L1)
SYMBOL
3 Pin TO-263 JEDEC TO-263 Inches Controlling Dimension MAX 0.190 0.010 0.039 0.070 0.029 0.065 0.380 0.420 0.625 0.110 0.066 8
Variation AA Millimeters Conversion Factor: 1 Inch = 25.40 mm MIN NOM MAX 4.06 4.83 0.00 0.25 0.51 0.99 1.14 1.78 0.38 0.74 1.14 1.65 8.38 9.65 6.86 9.65 10.67 6.22 2.54 BSC 14.61 15.88 1.78 2.79 1.68 0.25 BSC 0 8 JL Aug5-05 / Rev A
D1
BACK VIEW
E1
MIN NOM A 0.160 A1 0.000 b 0.020 b2 0.045 c 0.015 c2 0.045 D 0.330 D1 0.270 E 0.380 E1 0.245 e .100 BSC H 0.575 L 0.070 L1 L3 .010 BSC O 0 EXAR Pkg Signoff Date/Rev:
REV B 06/05/08
SP29150/51/52/53 1.5A Low Dropout Voltage Regulator
(c) Copyright 2008 Exar Corporation
9
PACKAGE: 5 PIN TO-263
E E/2 L1 C2 A Seating Plane
D
Chamfer Optional
H
1
2
3
4
5
SIDE VIEW
c
See Detail C
b
e
FRONT VIEW
Gauge Plane Seating Plane L3 A1
BACK VIEW
Thermal Pad (L1)
L
DETAIL C
5 Pin TO-263 JEDEC TO-263 Dimensions in Inches: Controlling Dimension
D1
Variation BA Dimensions in Millimeters Conversion Factor: 1 Inch = 25.40 mm MIN NOM MAX 4.06 4.83 0.00 0.25 0.51 0.99 0.38 0.74 1.14 1.65 8.38 9.65 6.86 9.65 10.67 6.22 1.702 BSC 14.61 15.88 1.78 2.79 1.68 0.254 BSC 0 8 JL Jun12-06 / Rev B
E1
SYMBOL MIN NOM MAX A 0.160 0.190 A1 0.000 0.010 b 0.020 0.039 c 0.015 0.029 c2 0.045 0.065 D 0.330 0.380 D1 0.270 E 0.380 0.420 E1 0.245 e .067 BSC H 0.575 0.625 L 0.070 0.110 L1 0.066 L3 .010 BSC O 0 8 EXAR Pkg Signoff Date/Rev:
REV B 06/05/08
SP29150/51/52/53 1.5A Low Dropout Voltage Regulator
(c) Copyright 2008 Exar Corporation
10
PACKAGE: 3 PIN TO-220
EXAR CORPORATION
Rev B 06/05/08
SP2950/5/52/53 .5A Low Dropout voltage Regulator
(c) Copyright 2008 Exar Corporation
PACKAGE: 5 PIN TO-220
Rev B 06/05/08
SP2950/5/52/53 .5A Low Dropout voltage Regulator
(c) Copyright 2008 Exar Corporation
2
PACKAGE: 3 PIN TO-220
Rev B 06/05/08
SP2950/5/52/53 .5A Low Dropout voltage Regulator
(c) Copyright 2008 Exar Corporation

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