The LD29150xx is a high current, high accuracy,
low-dropout voltage regulator series. These
P²PAK
regulators feature 400 mV dropout voltage and
very low ground current. Designed for high
current loads, these devices are also used in
lower current, extremely low dropout-critical
systems, where their tiny dropout voltage and
ground current values are important attributes.
Typical applications are in power supply switching
post regulation, series power supply for monitors,
series power supply for VCRs and TVs, computer
systems and battery powered systems.
Table 1.Device summary
Order codes
Part numbers
DPAKPPAKP²PAK
LD29150XX18LD29150DT18R1.8 V
Output voltages
LD29150XX25LD29150DT25R2.5 V
LD29150XX33LD29150DT33RLD29150P2T33R3.3 V
LD29150XX50LD29150DT50RLD29150PT50R5.0 V
LD29150XXLD29150PTRADJ
May 2012Doc ID 9614 Rev 171/22
This is information on a product in full production.
1. Above 14 V the device is automatically in shut-down.
DC input voltage30
DC output voltage-0.3 to 20V
Inhibit input voltage-0.3 to 20V
Output currentInternally limitedmA
Power dissipationInternally limitedmW
Storage temperature range-55 to 150°C
Operating junction temperature range-40 to 125°C
Note:Absolute maximum ratings are those values beyond which damage to the device may occur.
Functional operation under these conditions is not implied.
(1)
V
Table 3.Thermal data
S ym bo lPa ra me te rD PAKP PAKP² PAKU ni t
R
thJA
R
thJC
Thermal resistance junction-ambient10010060°C/W
Thermal resistance junction-case883°C/W
6/22Doc ID 9614 Rev 17
Page 7
LD29150xxElectrical characteristics
5 Electrical characteristics
IO = 10 mA, TJ = 25 °C, VI = 3.8 V, V
INH
= 2 V (
Note 3
), CI = 330 nF, CO = 10 µF, unless
otherwise specified.
Table 4.Electrical characteristics of LD29150#18
SymbolParameterTest conditionsMin.Typ.Max.Unit
V
O
ΔV
O
ΔVOLine regulationVI = 3 to 13 V0.060.5%
SVRSupply voltage rejection
V
DROP
I
q
I
sc
V
IL
V
IH
I
INH
eNOutput noise voltageB
T
SHDN
Output voltage
= 10 mA to 1.5 A, VI = 3 to 7.3 V
I
O
= - 40 to 125°C
T
J
1.7821.81.818
1.7641.836
Load regulationIO = 10 mA to 1.5 A0.21.0%
= 3.8 ± 1 V, IO = 0.75 A
I
)
Note 2
Note 2
Note 2
)0.40.7
= GND, TJ = - 40 to 125°C130180µA
INH
6272dB
)0.1
)0.2
mA
Dropout voltage
Quiescent current
f = 120 Hz, V
Note 1
(
= 250 mA, TJ = - 40 to 125°C (
I
O
= 0.75 A, TJ = - 40 to 125°C (
O
I
= 1.5 A, TJ = - 40 to 125°C (
O
= 0.75 A, TJ = - 40 to 125°C1540
I
O
= 1.5 A, TJ = - 40 to 125°C3080
I
O
V
= 13 V, V
I
Short circuit currentVI - VO = 5.5 V2.2A
Control input logic lowOFF MODE, (
Control input logic highON MODE, (
Control input currentTJ = - 40 to 125°C, V
= 10 Hz to 100 kHz, IO = 100 mA72µV
P
Note 3
), TJ = - 40 to 125°C0.8V
Note 3
), TJ = - 40 to 125°C2V
= 13 V510µA
INH
Thermal shutdown150°C
V
VI
RMS
Note:1Guaranteed by design.
2Dropout voltage is defined as the input-to-output differential when the output voltage drops
to 99% of its nominal value with V
3Only for version with Inhibit function.
+ 1 V applied to VI.
O
Doc ID 9614 Rev 177/22
Page 8
Electrical characteristicsLD29150xx
IO = 10 mA, TJ = 25 °C, VI = 4.5 V, V
INH
= 2 V (
Note 3
), CI = 330 nF, CO = 10 µF, unless
otherwise specified.
Table 5.Electrical characteristics of LD29150#25
SymbolParameterTest conditionsMin.Typ.Max.Unit
V
O
ΔV
O
ΔV
O
SVRSupply voltage rejection
V
DROP
I
q
I
sc
V
IL
V
IH
I
INH
eNOutput noise voltageB
T
SHDN
Output voltage
= 10 mA to 1.5 A, VI = 3.5 to 8 V
I
O
= - 40 to 125°C
T
J
2.4752.52.525
2.452.55
Load regulationIO = 10 mA to 1.5 A0.21.0%
Line regulationVI = 3.5 to 13 V0.060.5%
Dropout voltage
Quiescent current
f = 120 Hz, V
(
Note 1
= 250 mA, TJ = - 40 to 125°C (
I
O
= 0.75 A, TJ = - 40 to 125°C (
O
IO = 1.5 A, TJ = - 40 to 125°C (
= 0.75 A, TJ = - 40 to 125°C1540
I
O
= 1.5 A, TJ = - 40 to 125°C3080
I
O
VI = 13 V, V
= 4.5 ±1 V, IO = 0.75 A
I
)
Note 2
Note 2
Note 2
)0.40.7
= GND, TJ = - 40 to 125°C130180µA
INH
5570dB
)0.1
)0.2
mA
Short circuit currentVI - VO = 5.5 V2.2A
Control input logic lowOFF MODE, (
Control input logic highON MODE, (
Control input currentTJ = - 40 to 125°C, V
= 10 Hz to 100 kHz, IO = 100 mA100µV
P
Note 3
), TJ = - 40 to 125°C0.8V
Note 3
), TJ = - 40 to 125°C2V
= 13 V510µA
INH
Thermal shutdown150°C
V
VI
RMS
Note:1Guaranteed by design.
2Dropout voltage is defined as the input-to-output differential when the output voltage drops
to 99% of its nominal value with V
+ 1 V applied to VI.
O
3Only for version with Inhibit function.
8/22Doc ID 9614 Rev 17
Page 9
LD29150xxElectrical characteristics
IO = 10 mA, TJ = 25 °C, VI = 5.3 V, V
INH
= 2 V (
Note 3
), CI = 330 nF, CO = 10 µF, unless
otherwise specified.
Table 6.Electrical characteristics of LD29150#33
SymbolParameterTest conditionsMin.Typ.Max.Unit
V
O
ΔV
O
ΔV
O
SVRSupply voltage rejection
V
DROP
I
q
I
sc
V
IL
V
IH
I
INH
eNOutput noise voltageB
T
SHDN
Output voltage
= 10 mA to 1.5 A, VI = 4.3 to 8.8 V
I
O
= - 40 to 125°C
T
J
3.2673.33.333
3.2343.366
Load regulationIO = 10 mA to 1.5 A0.21.0%
Line regulationVI = 4.3 to 13 V0.060.5%
Dropout voltage
Quiescent current
f = 120 Hz, V
(
Note 1
= 250 mA, TJ = - 40 to 125°C (
I
O
= 0.75 A, TJ = - 40 to 125°C (
O
IO = 1.5 A, TJ = - 40 to 125°C (
= 0.75 A, TJ = - 40 to 125°C1540
I
O
= 1.5 A, TJ = - 40 to 125°C3080
I
O
VI = 13 V, V
= 5.3 ±1 V, IO = 0.75 A
I
)
Note 2
Note 2
Note 2
)0.40.7
= GND, TJ = - 40 to 125°C130180µA
INH
5267dB
)0.1
)0.2
mA
Short circuit currentVI - VO = 5.5 V2.2A
Control input logic lowOFF MODE, (
Control input logic highON MODE, (
Control input currentTJ = - 40 to 125°C, V
= 10 Hz to 100 kHz, IO = 100 mA132µV
P
Note 3
), TJ = - 40 to 125°C0.8V
Note 3
), TJ = - 40 to 125°C2V
= 13 V510µA
INH
Thermal shutdown150°C
V
VI
RMS
Note:1Guaranteed by design.
2Dropout voltage is defined as the input-to-output differential when the output voltage drops
to 99% of its nominal value with V
3Only for version with Inhibit function.
+ 1 V applied to VI.
O
Doc ID 9614 Rev 179/22
Page 10
Electrical characteristicsLD29150xx
IO = 10 mA, TJ = 25 °C, VI = 7 V, V
INH
= 2 V (
Note 3
), CI = 330 nF, CO = 10 µF, unless
otherwise specified.
Table 7.Electrical characteristics of LD29150#50
SymbolParameterTest conditionsMin.Typ.Max.Unit
V
O
ΔV
O
ΔV
O
SVRSupply voltage rejection
V
DROP
I
q
I
sc
V
IL
V
IH
I
INH
eNOutput noise voltageB
T
SHDN
Output voltage
= 10 mA to 1.5 A, VI = 6 to 10.5 V
I
O
= - 40 to 125°C
T
J
4.9555.05
4.95.1
Load regulationIO = 10 mA to 1.5 A0.21.0%
Line regulationVI = 6 to 13 V0.060.5%
Dropout voltage
Quiescent current
f = 120 Hz, V
(
Note 1
= 250 mA, TJ = - 40 to 125°C (
I
O
= 0.75 A, TJ = - 40 to 125°C (
O
IO = 1.5 A, TJ = - 40 to 125°C (
= 0.75 A, TJ = - 40 to 125°C1540
I
O
= 1.5 A, TJ = - 40 to 125°C3080
I
O
VI = 13 V, V
= 7 ±1 V, IO = 0.75 A
I
)
Note 2
Note 2
Note 2
)0.40.7
= GND, TJ = - 40 to 125°C130180µA
INH
4964dB
)0.1
)0.2
mA
Short circuit currentVI - VO = 5.5 V2.2A
Control input logic lowOFF MODE, (
Control input logic highON MODE, (
Control input currentTJ = - 40 to 125°C, V
= 10 Hz to 100 kHz, IO = 100 mA200µV
P
Note 3
), TJ = - 40 to 125°C0.8V
Note 3
), TJ = - 40 to 125°C2V
= 13 V510µA
INH
Thermal shutdown150°C
V
VI
RMS
Note:1Guaranteed by design.
2Dropout voltage is defined as the input-to-output differential when the output voltage drops
to 99% of its nominal value with V
+ 1 V applied to VI.
O
3Only for version with Inhibit function.
10/22Doc ID 9614 Rev 17
Page 11
LD29150xxElectrical characteristics
IO = 10 mA, TJ = 25 °C, VI = 3.23 V, V
INH
= 2 V (
Note 3
), CI = 330 nF, CO = 10 µF adjust pin
tied to output pin.
Table 8.Electrical characteristics of LD29150#ADJ
SymbolParameterTest conditionsMin.Typ.Max.Unit
V
I
ΔV
O
ΔV
O
V
REF
SVRSupply voltage rejection
I
q
I
ADJ
I
sc
V
IL
V
IH
I
INH
eNOutput noise voltageB
T
SHDN
Minimum operating input
voltage
= 10 mA to 1.5 A, TJ = - 40 to 125°C2.5V
I
O
Load regulationIO = 10 mA to 1.5 A0.21.0%
Line regulationVI = 2.5 V to 13 V, IO = 10 mA0.060.5%
Reference voltage
Quiescent current
IO = 10 mA to 1.5 A, VI = 2.5 to 4.5 V
T
= - 40 to 125°C (
J
f = 120 Hz, V
Note 1
(
= 0.75 A, TJ = - 40 to 125°C1540
I
O
= 1.5 A, TJ = - 40 to 125°C3080
I
O
V
= 13 V, V
I
= 3.23 ±1 V, IO = 0.75 A
I
)
= GND, TJ = - 40 to 125°C130180µA
INH
Adjust pin currentTJ = - 40 to 125°C (
Note 2
)
Note 1
)1µA
-1%1.23+1%
-2%+2%
4575dB
mA
Short circuit currentVI - VO = 5.5 V2.2A
Control input logic lowOFF MODE, (
Control input logic highON MODE, (
Control input currentTJ = - 40 to 125°C, V
= 10 Hz to 100 kHz, IO = 100 mA50µV
P
Note 3
),TJ = - 40 to 125°C0.8V
Note 3
), TJ = - 40 to 125°C2V
= 13 V510µA
INH
Thermal shutdown150°C
V
RMS
Note:1Guaranteed by design.
2Reference voltage is measured between output and GND pin, with ADJ PIN tied to V
3Only for version with Inhibit function.
.
OUT
Doc ID 9614 Rev 1711/22
Page 12
Typical characteristicsLD29150xx
6 Typical characteristics
Figure 5.Output voltage vs. temperatureFigure 6.Reference voltage vs. temperature
Figure 7.Dropout voltage vs. temperatureFigure 8.Dropout voltage vs. output current
Figure 9.Quiescent current vs. output
current (V
= 13 V)
I
Figure 10. Quiescent current vs. output
12/22Doc ID 9614 Rev 17
current (VI = 4.5 V)
Page 13
LD29150xxTypical characteristics
Figure 11. Quiescent current vs. supply
voltage
Figure 13. Quiescent current vs. temperature
(I
= 1.5 A)
O
Figure 12. Quiescent current vs. temperature
(I
= 10 mA)
O
Figure 14. Short circuit current vs.
temperature
Figure 15. Adjust pin current vs. temperature Figure 16. Supply voltage rejection vs.
Doc ID 9614 Rev 1713/22
temperature
Page 14
Typical characteristicsLD29150xx
Figure 17. Output voltage vs. input voltageFigure 18. Stability vs. C
Figure 19. Line transientFigure 20. Load transient
O
VI=3.5 to 5.5V, IO=10mA, VO=2.5V, CO=10µF
Figure 21. Start-up time 10 mAFigure 22. Start-up time 1.5 A
CO=10µF, IO=10mA, V
=2V, VO=5V, VI=7V
INH
VI=5V, IO=10mA to 1.5A, VO=2.5V, CO=10µF
CO=10µF, IO=1.5A, V
=2V, VO=5V, VI=7V
INH
14/22Doc ID 9614 Rev 17
Page 15
LD29150xxPackage mechanical data
7 Package mechanical data
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK
specifications, grade definitions and product status are available at:
ECOPACK
®
packages, depending on their level of environmental compliance. ECOPACK®
Tape & reel D2PAK-P2PAK-D2PAK/A-P2PAK/A mechanical data
Dim.
mm.inch.
Min.Typ.Max.Min.Typ.Max.
A1807.086
C12.813.013.20.5040.5120.519
D20.20.795
N602.362
T14.40.567
Ao10.5010.610.700.4130.4170.421
Bo15.7015.8015.900.6180.6220.626
Ko4.804.905.000.1890.1930.197
Po3.94.04.10.1530.1570.161
P11.912.012.10.4680.4720.476
20/22Doc ID 9614 Rev 17
Page 21
LD29150xxRevision history
8 Revision history
Table 9.Document revision history
DateRevisionChanges
17-Jun-20045
19-Jul-20046Remove Package TO-220FP4.
08-Nov-20047Mistake Figure 7.
21-Mar-20058Add V
21-Oct-20059Order Codes Has Been Updated.
17-Oct-200610Add new package P²PAK.
13-Nov-200611Add row T
11-May-200712Order codes updated.
15-Feb-200813Added:
28-Jul-200914Modified:
22-Sep-201015Modified:
27-Oct-201016Updated: DPAK mechanical data
07-May-201217
Add figures 20 and 21, PPAK, TO-220 and TO-220FP mechanical
data updated.
and V
O
Table 1 on page 1
Modified: pin connections for PPAK, P²PAK and DPAK
.
page 4
on Table 2.
INH
on tables of the electrical characteristics.
SHDN
.
Table 1 on page 1
Table 1 on page 1
.
.
on page 16
.
Figure 3 on
Doc ID 9614 Rev 1721/22
Page 22
LD29150xx
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