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
■ PowerPC™ 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 volt-
age 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
V
IN
+
6.8µ F
1
SPX29150
3
2
+
10µ F
V
OUT
V
IN
+
6.8µ F
1
SPX29152
4
2
GND
3
5
ADJ
V
OUT
+
R1 10µ F
R2
Figure 1. Fixed Output Linear Regulator
Rev A 8/5/06
Figure 2. Adjustable Output Linear Regulator
© Copyright 2006 Sipex Corporation
SP2950/5/52/53 .5A Low Dropout voltage Regulator
ABSOLUTE MAXIMUM RATINGS
Storage Temperature Range........................-65°C to +150°C
Operating Junction Temperature Range......-40°C to +125°C
Input Voltage (Note 7)......................................................6v
at v
in
=v
out
+ 1V and I
out
= 10mA, C
in
= 6.8µF, C
out
= 10µF, T
a
= 25°C, 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
i
out
= 10mA
.8
1.782
.88
output voltage
v
10mA ≤ I
out
≤ 1.5A, 2.5V ≤ V
in
≤ 16V
1.8
1.764
1.836
2.5V Version
i
out
= 10mA
2.5
2.475
2.525
output voltage
v
10mA ≤I
out
≤1.5A, 3.5V≤V
in
≤16V
i
1.5A,
≤V
6v
v
2.5
2.450
2.550
3.3V Version
i
out
= 10mA
3.3
3.267
3.333
output voltage
v
10mA ≤I
out
≤1.5A, 4.3V≤V
in
≤16V
i
1.5A,
≤V
6v
v
3.3
3.234
3.366
5.0V Version
i
out
= 10mA
5.0
4.950
5.050
output voltage
v
10mA ≤I
out
≤1.5A, 6.0V≤V
in
≤16V
i
1.5A,
≤V
6v
v
5.0
4.900
5.100
All Voltage Options
SPX29150/51/52/53
Line Regulation
i
o
= 10mA, (V
out
+ 1V) ≤ V
in
≤
6v
v
16V
0.
0.5
%
v
in
= v
out
+ 1V, 10mA ≤ I
out
≤ I
full
-
Load Regulation
0.2
%
load
ELECTRICAL CHARACTERISTICS
∆V
∆T
Dropout Voltage (Note 1)
(except 1.8V version)
Ground Current (Note 3)
i
gnddo
Ground Pin Cur-
rent at Dropout
Current Limit
Output Noise Voltage
(10Hz to 100kHz)
i
l
= 100mA
Reference Voltage
output voltage
Temperature Coefficient
i
o
= 100mA
i
o
= 750mA
i
o
= .5A
i
o
= 750mA, V
in
= v
out
, +1V
i
o
= .5A
v
in
= 0.1V less than specified V
out
i
out
= 10mA
v
out
= 0.0V (Note 2)
C
l
= 0µf
C
l
= 33µf
Adjustable version only
13
70
230
390
2
45
0.9
2.2
400
260
1.240
.228
1.215
.203
1.7
100
200
ppm/°C
mV
600
25
mA
mA
A
µv
rms
.252
1.265
1.277
80
120
v
Reference Voltage
Adjustable version only (Note 8)
Adjust Pin
Bias Current
Reference Voltage Tem-
perature
(Note 4)
Coefficient
Adjust Pin Bias
Current Temperature
Coefficient
Flag Output (Error Comparator) SPX29151/53
Output Leakage Current
output Low voltage
Rev A 8/5/06
40
3
nA
ppm/°C
0.
nA/°C
v
oh
=6v
Device set for 5V, V
in
=4.5V,
i
ol
=250µA
0.
200
.00
2.00
300
400
UA
mV
SP2950/5/52/53 .5A Low Dropout voltage Regulator
© Copyright 2006 Sipex 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
v
in
< 10V
v
en
=6v
v
en
=0.8v
Regulator output Cur-
rent 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
0
3
30
3
32
°C/W
00
0.8
600
750
1
2
500
v
µA
µA
µA
CONDITIONS
Device set for 5V (Note 5)
Device set for 5V (Note 5)
Device set for 5V (Note 5)
Typ
60
75
5
SPX29150/51
Min
Max
40
25
95
140
Units
mV
mV
mV
2.4V
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: V
in
= v
out
(NOMINAL) +1V. For example, use V
in
= 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 = V
out
/v
ref
= (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 V
out
as V
out
is varied, with the dropout warning occurring at typically 5% below nominal, 7.7% guaranteed.
Note 6: V
en
≤ 0.8V and V
in
≤ 16V, V
out
= 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: V
ref
≤ V
out
≤ (V
in
-1), 2.5V≤V
in
≤ 16V, 10mA ≤ I
l
≤ I
fl
, T
j
< T
jmax
.
BLOCK DIAGRAM
OUT
IN
O.v
I
LIMIT
FLAG
+
-
1.180v
Reference
1.240v
+
-
28v
R1*
ADJ
EN
Thermal
shutdown
R2*
GND
Rev A 8/5/06
SP2950/5/52/53 .5A Low Dropout voltage Regulator
© Copyright 2006 Sipex Corporation
3
TYPICAL PERFORMANCE CHARACTERISTICS
3.320
3.315
3.310
3.30
3.305
Vout (V )
Vout (V)
3.305
3.300
3.295
3.290
3.285
3.280
4
6
8
10
Vin (V)
12
3.3V Device
IL = 10mA
CL = 10uF
14
16
3.300
3.295
3.290
3.285
3.280
0
0.25
0.5
0.75
IL (A)
3.3V Device
Vin = 4.3V
CL = 0µf
.25
.5
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
0.0
0.0
0
0.25
0.5
0.75
IL (A)
.25
.5
3.3V Device
Vin = 4.3V
CL = 0uf
240
220
200
80
4
6
8
0
Vin (V)
2
4
16
3.3V Device
IL = 10mA
CL = 0uf
Figure 5. Ground Current vs Load Current
00
90
80
Figure 6. Ground Current vs Input Voltage
600
500
Vdropout (mV)
Ignd (mA)
70
60
50
40
30
20
0
0
0
0.25
0.5
0.75
IL (A)
.25
.5
3.3V Device
vin = 3.2v
CL = 0uf
400
300
200
100
0
0
0.25
0.5
0.75
IL (A)
1
1.25
1.5
3.3V Device
CL = 10uF
Figure 7. Ground Current vs Load Current in Dropout
Figure 8. Dropout Voltage vs Load Current
Rev A 8/5/06
SP2950/5/52/53 .5A Low Dropout voltage Regulator
© Copyright 2006 Sipex Corporation
4
TYPICAL PERFORMANCE CHARACTERISTICS
280
270
260
250
240
230
220
20
200
90
80
-40
-20
0
20
40
60
Temperature (
o
C)
80
00
20
3.3V Device
Vin = 4.3V
IL = 10mA
CL = 0uf
3.320
3.30
3.300
3.290
Vout
Ignd (uA)
3.280
3.270
3.260
3.250
3.240
3.230
3.220
-40
3.3V Device
Vin = 4.3V
IL = 10mA
CL = 0uf
-20
0
20
40
60
Temperature (
o
C)
80
00
20
Figure 9. Ground Current vs Temperature
at i
load
=10mA
7.00
6.80
6.60
6.40
Figure 10. Output Voltage vs Temperature at
I
load
=10mA
30
Ignd (mA)
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
3.3V Device
Vin = 4.3V
IL = 500mA
CL = 0uf
29
28
27
26
25
24
23
22
21
20
3.3V Device
Vin = 3.2V
IL = 750mA
CL = 10µF
00
20
-40
-20
0
20
40
60
o
Temperature ( C)
80
100
120
Figure 11. Ground Current vs Temperature at
i
load
=500mA
52.0
50.0
48.0
Ignd (mA)
Figure 12. Ground Current vs Temperature in
Dropout at i
load
=750mA
00
95
90
Ignd (mA)
85
80
75
70
-40
-20
0
20
40
60
Temperature (
o
C)
80
00
20
3.3V Device
vin = 3.2v
iL = .5A
CL = 0µf
46.0
44.0
42.0
40.0
38.0
36.0
-40
-20
0
20
40
60
(
o
C)
80
00
20
Temperature
3.3V Device
Vin = 4.3V
iL = .5A
CL = 0uf
Figure 13. Ground Current vs Temperature at
i
load
=.5A
Figure 14. Ground Current vs Temperature in
Dropout at i
load
=.5A
Rev A 8/5/06
SP2950/5/52/53 .5A Low Dropout voltage Regulator
© Copyright 2006 Sipex Corporation
5
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