The LD29300xx is a high current, high accuracy,
low-dropout voltage regulator series. These
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.
1. Above 14 V the device is automatically in shut-down.
DC input voltage30
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.
Table 3.Thermal data
SymbolParameterTO-220D2PA K- P2PAK-D2PAK/A-P2PA K/ AUn it
(1)
V
R
R
Thermal resistance junction-ambient5060°C/W
thJA
Thermal resistance junction-case33°C/W
thJC
6/26
LD29300xxElectrical characteristics
5 Electrical characteristics
Table 4.Electrical characteristics of LD29300#15
(I
= 10 mA, TJ = 25 °C, VI = 3.5 V, V
O
INH
= 2 V
(1)
, CI = 330 nF, CO = 10 µF, unless otherwise
specified)
SymbolParameterTest conditionsMin.Typ.Max.Unit
Minimum operating input
V
I
voltage
Output voltage
V
O
ΔV
ΔV
Load regulationIO = 10mA to 3A0.21.0%
O
Line regulationVI = 3 to 13V0.060.5%
O
SVRSupply voltage rejectionf = 120 Hz, V
I
Quiescent current
q
Short circuit currentVI - VO = 5.5V4.5A
I
sc
Control input logic lowOFF MODE
V
IL
V
Control input logic highON MODE
IH
I
Control input currentTJ = -40 to 125°C, V
INH
eNOutput noise voltageB
1. Only for version with Inhibit function.
2. Guaranteed by design
= 10mA to 3A, TJ = -40 to 125°C2.5V
I
O
= 10mA to 3A, VI = 3 to 7V
I
O
= -40 to 125°C
T
J
= 3.5 ± 1V, IO = 1.5A
I
I
= 1.5A, TJ = -40 to 125°C2050
O
= 3A, TJ = -40 to 125°C45100
I
O
V
= 13V, V
I
= 10Hz to 100kHz, IO = 100mA60µV
P
= GND, TJ = -40 to 125°C130180µA
INH
(1)
, TJ = -40 to 125°C0.8V
(1)
, TJ = -40 to 125°C2V
= 13V510µA
INH
1.4851.51.515
1.471.53
(2)
6575dB
mA
V
RMS
7/26
Electrical characteristicsLD29300xx
Table 5.Electrical characteristics of LD29300#18
(I
= 10 mA, TJ = 25 °C, VI = 3.8 V, V
O
INH
= 2 V
(1)
, CI = 330 nF, CO = 10 µF, unless otherwise
specified)
SymbolParameterTest conditionsMin.Typ.Max.Unit
= 10mA to 3A, VI = 3 to 7.3V
I
V
Output voltage
O
ΔV
ΔV
Load regulationIO = 10mA to 3A0.21.0%
O
Line regulationVI = 3 to 13V0.060.5%
O
SVRSupply voltage rejectionf = 120 Hz, V
V
I
Dropout voltage
DROP
I
Quiescent current
q
I
Short circuit currentVI - VO = 5.5V4.5A
sc
Control input logic lowOFF MODE
V
IL
Control input logic highON MODE
V
IH
Control input currentTJ = -40 to 125°C, V
INH
eNOutput noise voltageB
1. Only for version with Inhibit function.
2. Guaranteed by design.
3. Dropout voltage is defined as the input-to-output differential when the output voltage drops to 99 % of its nominal value with
+ 1 V applied to VI.
V
O
O
= -40 to 125°C
T
J
= 3.8 ±1V, IO = 1.5A
I
I
= 500mA, TJ = -40 to 125°C
O
= 1.5A, TJ = -40 to 125°C
O
= 3A, TJ = -40 to 125°C
I
O
I
= 1.5A, TJ = -40 to 125°C2050
O
= 3A, TJ = -40 to 125°C45100
I
O
= 13V, V
V
I
= 10Hz to 100kHz, IO = 100mA60µV
P
= GND, TJ = -40 to 125°C130180µA
INH
(1)
, TJ = -40 to 125°C0.8V
(1)
, TJ = -40 to 125°C2V
= 13V510µA
INH
(3)
(3)
(3)
1.7821.81.818
1.7641.836
(2)
6272dB
0.1
0.2
0.40.7
mA
V
VI
RMS
8/26
LD29300xxElectrical characteristics
Table 6.Electrical characteristics of LD29300#25
(I
= 10 mA, TJ = 25 °C, VI = 4.5 V, V
O
INH
= 2 V
(1)
, CI = 330 nF, CO = 10 µF, unless otherwise
specified)
SymbolParameterTest conditionsMin.Typ.Max.Unit
= 10mA to 3A, VI = 3.5 to 8V
I
V
Output voltage
O
ΔV
ΔV
Load regulationIO = 10mA to 3A0.21.0%
O
Line regulationVI = 3 to 13V0.060.5%
O
SVRSupply voltage rejectionf = 120 Hz, V
V
I
Dropout voltage
DROP
I
Quiescent current
q
I
Short circuit currentVI - VO = 5.5V4.5A
sc
Control input logic lowOFF MODE
V
IL
Control input logic highON MODE
V
IH
Control input currentTJ = -40 to 125°C, V
INH
eNOutput noise voltageB
1. Only for version with Inhibit function.
2. Guaranteed by design.
3. Dropout voltage is defined as the input-to-output differential when the output voltage drops to 99 % of its nominal value with
+ 1 V applied to VI.
V
O
O
= -40 to 125°C
T
J
= 4.5 ±1V, IO = 1.5A
I
I
= 500mA, TJ = -40 to 125°C
O
= 1.5A, TJ = -40 to 125°C
O
= 3A, TJ = -40 to 125°C
I
O
I
= 1.5A, TJ = -40 to 125°C2050
O
= 3A, TJ = -40 to 125°C45100
I
O
= 13V, V
V
I
= 10Hz to 100kHz, IO = 100mA100µV
P
= GND, TJ = -40 to 125°C130180µA
INH
(1)
, TJ = -40 to 125°C0.8V
(1)
, TJ = -40 to 125°C2V
= 13V510µA
INH
(3)
(3)
(3)
2.4752.52.525
2.452.55
(2)
5570dB
0.1
0.2
0.40.7
mA
V
VI
RMS
9/26
Electrical characteristicsLD29300xx
Table 7.Electrical characteristics of LD29300#33
(I
= 10 mA, TJ = 25 °C, VI = 5.3 V, V
O
INH
= 2 V
(1)
, CI = 330 nF, CO = 10 µF, unless otherwise
specified)
SymbolParameterTest conditionsMin.Typ.Max.Unit
= 10mA to 3A, VI = 4.3 to 8.8V
I
V
Output voltage
O
ΔV
ΔV
Load regulationIO = 10mA to 3A0.21.0%
O
Line regulationVI = 4.3 to 13V0.060.5%
O
SVRSupply voltage rejectionf = 120 Hz, V
V
I
Dropout voltage
DROP
I
Quiescent current
q
I
Short circuit currentVI - VO = 5.5V4.5A
sc
Control input logic lowOFF MODE
V
IL
Control input logic highON MODE
V
IH
Control input currentTJ = -40 to 125°C, V
INH
eNOutput noise voltageB
1. Only for version with Inhibit function.
2. Guaranteed by design.
3. Dropout voltage is defined as the input-to-output differential when the output voltage drops to 99 % of its nominal value with
+ 1 V applied to VI.
V
O
O
= -40 to 125°C
T
J
= 5.3 ±1V, IO = 1.5A
I
I
= 500mA, TJ = -40 to 125°C
O
= 1.5A, TJ = -40 to 125°C
O
= 3A, TJ = -40 to 125°C
I
O
I
= 1.5A, TJ = -40 to 125°C2050
O
= 3A, TJ = -40 to 125°C45100
I
O
= 13V, V
V
I
= 10Hz to 100kHz, IO = 100mA132µV
P
= GND, TJ = -40 to 125°C130180µA
INH
(1)
, TJ = -40 to 125°C0.8V
(1)
, TJ = -40 to 125°C2V
= 13V510µA
INH
(3)
(3)
(3)
3.2673.33.333
3.2343.366
(2)
5267dB
0.1
0.2
0.40.7
mA
V
VI
RMS
10/26
LD29300xxElectrical characteristics
Table 8.Electrical characteristics of LD29300#50
(I
= 10 mA, TJ = 25 °C, VI = 7 V, V
O
INH
= 2 V
(1)
, CI = 330 nF, CO = 10 µF, unless otherwise
specified)
SymbolParameterTest conditionsMin.Typ.Max.Unit
= 10mA to 3A, VI = 6 to 10.5V
I
V
Output voltage
O
ΔV
ΔV
Load regulationIO = 10mA to 3A0.21.0%
O
Line regulationVI = 6 to 13V0.060.5%
O
SVRSupply voltage rejectionf = 120 Hz, V
V
I
Dropout voltage
DROP
I
Quiescent current
q
I
Short circuit currentVI - VO = 5.5V4.5A
sc
Control input logic lowOFF MODE
V
IL
Control input logic highON MODE
V
IH
Control input currentTJ = -40 to 125°C, V
INH
eNOutput noise voltageB
1. Only for version with Inhibit function.
2. Guaranteed by design.
3. Dropout voltage is defined as the input-to-output differential when the output voltage drops to 99 % of its nominal value with
+ 1 V applied to VI.
V
O
O
= -40 to 125°C
T
J
= 7 ±1V, IO = 1.5A
I
I
= 500mA, TJ = -40 to 125°C
O
= 1.5A, TJ = -40 to 125°C
O
= 3A, TJ = -40 to 125°C
I
O
I
= 1.5A, TJ = -40 to 125°C2050
O
= 3A, TJ = -40 to 125°C45100
I
O
= 13V, V
V
I
= 10Hz to 100kHz, IO = 100mA200µV
P
= GND, TJ = -40 to 125°C130180µA
INH
(1)
, TJ = -40 to 125°C0.8V
(1)
, TJ = -40 to 125°C2V
= 13V510µA
INH
(2)
(3)
(3)
(3)
4.9555.05
4.95.1
4964dB
0.1
0.2
0.40.7
mA
V
VI
RMS
11/26
Electrical characteristicsLD29300xx
Table 9.Electrical characteristics of LD29300#80
= 10 mA, TJ = 25 °C, VI = 10 V, V
(I
O
INH
= 2 V
(1)
, CI = 330 nF, CO = 10 µF, unless otherwise
specified)
SymbolParameterTest conditionsMin.Typ.Max.Unit
= 10mA to 3A, VI = 9 to 13V
I
V
Output voltage
O
ΔV
ΔV
Load regulationIO = 10mA to 3A0.21.0%
O
Line regulationVI = 9 to 13V0.060.5%
O
SVRSupply voltage rejectionf = 120 Hz, V
V
I
Dropout voltage
DROP
I
Quiescent current
q
I
Short circuit currentVI - VO = 5.5V4.5A
sc
Control input logic lowOFF MODE
V
IL
Control input logic highON MODE
V
IH
Control input currentTJ = -40 to 125°C, V
INH
eNOutput noise voltageB
1. Only for version with Inhibit function.
2. Guaranteed by design.
3. Dropout voltage is defined as the input-to-output differential when the output voltage drops to 99 % of its nominal value with
+ 1 V applied to VI.
V
O
O
= -40 to 125°C
T
J
= 9 ±1V, IO = 1.5A
I
I
= 500mA, TJ = -40 to 125°C
O
= 1.5A, TJ = -40 to 125°C
O
= 3A, TJ = -40 to 125°C
I
O
I
= 1.5A, TJ = -40 to 125°C2050
O
= 3A, TJ = -40 to 125°C45100
I
O
= 13V, V
V
I
= 10Hz to 100kHz, IO = 100mA320µV
P
= GND, TJ = -40 to 125°C130180µA
INH
(1)
, TJ = -40 to 125°C0.8V
(1)
, TJ = -40 to 125°C2V
= 13V510µA
INH
(2)
(3)
(3)
(3)
7.9288.08
7.848.16
4559dB
0.1
0.2
0.40.7
mA
V
VI
RMS
12/26
LD29300xxElectrical characteristics
Table 10.Electrical characteristics of LD29300#ADJ
(I
= 10 mA, TJ = 25 °C, VI = 3.23 V, V
O
INH
= 2 V
(1)
, CI = 330 nF, CO = 10 µF adjust pin tied to
output pin)
SymbolParameterTest conditionsMin.Typ.Max.Unit
Minimum operating input
V
I
voltage
ΔVOLoad regulationIO = 10mA to 3A0.21.0%
ΔV
V
Line regulationVI = 2.5 V to 13V0.060.5%
O
Reference voltage
REF
SVRSupply voltage rejectionf = 120 Hz, V
I
Quiescent current
q
I
I
Adjust pin currentTJ = -40 to 125°C
ADJ
I
Short circuit currentVI - VO = 5.5V4.5A
sc
Control input logic lowOFF MODE
V
IL
Control input logic highON MODE
V
IH
Control input currentTJ = -40 to 125°C, V
INH
eNOutput noise voltageB
1. Only for version with Inhibit function.
2. Reference voltage is measured between output and GND pin, with ADJ PIN tied to V
3. Guaranteed by design.
I
= 10mA to 3A, TJ = -40 to 125°C2.5V
O
= 10mA to 3A, VI = 2.5 to 4.5V
I
O
= -40 to 125°C
T
J
= 1.5A, TJ = -40 to 125°C2050
I
O
= 3A, TJ = -40 to 125°C45100
I
O
= 13V, V
V
I
= 10Hz to 100kHz, IO = 100mA50µV
P
(2)
= 3.23 ±1V, IO = 1.5A
I
= GND, TJ = -40 to 125°C130180µA
INH
(3)
(1)
,TJ = -40 to 125°C0.8V
(1)
, TJ = -40 to 125°C2V
= 13V510µA
INH
-1%1.23+1%
-2%+2%
(3)
6575dB
.
OUT
1µA
mA
V
RMS
13/26
Typical characteristicsLD29300xx
6 Typical characteristics
Figure 5.Output voltage vs temperatureFigure 6.Dropout voltage vs temperature
Figure 7.Dropout voltage vs output currentFigure 8.Quiescent current vs output current
Figure 9.Quiescent current vs output current Figure 10. Quiescent current vs supply
14/26
voltage
LD29300xxTypical characteristics
Figure 11. Quiescent current vs temperatureFigure 12. Quiescent current vs temperature
Figure 13. Short circuit current vs temperature Figure 14. Supply voltage rejection vs
temperature
Figure 15. Stability vs C
O
Figure 16. Line transient
VI=3.5 to 5.5V, I
=10mA, VO=2.5V, CO=10µF
LOAD
15/26
Typical characteristicsLD29300xx
Figure 17. Load transient
VI=4.5V, IO=10mA to 3A, VO=2.5V, CO=47µF
16/26
LD29300xxPackage mechanical data
7 Package mechanical data
In order to meet environmental requirements, ST offers these devices in ECOPACK®
packages. These packages have a lead-free second level interconnect. The category of
second Level Interconnect is marked on the package and on the inner box label, in
compliance with JEDEC Standard JESD97. The maximum ratings related to soldering
conditions are also marked on the inner box label. ECOPACK is an ST trademark.
ECOPACK specifications are available at: www.st.com.
17/26
Package mechanical dataLD29300xx
TO-220 (A type) mechanical data
Dim.
A4.404.600.1730.181
b0.610.880.0240.035
b11.151.700.0450.067
c0.490.700.0190.028
D15.2515.750.6000.620
E10.010.400.3940.409
e2.42.70.0940.106
e14.955.150.1950.203
F1.231.320.0480.052
H16.26.60.2440.260
J12.402.720.0940.107
L13.014.00.5120.551
L13.53.930.1380.155
L2016.40.646
L3028.91.138
φP3.753.850.1480.152
Q2.652.950.1040.116
Min.Typ.Max.Min.Typ.Max.
mm.inch.
18/26
0015988/N
LD29300xxPackage mechanical data
D2PAK mechanical data
mm.inch.
Dim.
Min.Typ.Max.Min.Typ.Max.
A4.44.60.1730.181
A12.492.690.0980.106
A20.030.230.0010.009
B0.70.930.0270.036
B21.141.70.0440.067
C0.450.60.0170.023
C21.231.360.0480.053
D8.959.350.3520.368
D180.315
E1010.40.3930.409
E18.50.335
G4.885.280.1920.208
L1515.850.5900.624
L21.271.40.0500.055
L31.41.750.0550.068
M2.43.20.0940.126
R0.40.016
V20°8°0°8°
P011P6G
19/26
Package mechanical dataLD29300xx
D2PAK/A mechanical data
mm.inch.
Dim.
Min.Typ.Max.Min.Typ.Max.
A4.404.600.1730.181
A12.492.690.0980.106
A20.030.230.0010.009
B0.70.930.0280.037
B10.81.30.0310.051
B21.141.70.0450.067
C0.450.600.0180.024
C21.231.360.0480.054
D8.959.350.3520.368
D180.315
E1010.40.3940.409
E18.50.335
G4.885.280.1920.208
L1515.850.5910.624
L21.271.40.0500.055
M2.43.20.0940.126
R0.40.016
V20°8°0°8°
20/26
7106164/D
LD29300xxPackage mechanical data
P2PAK mechanical data
Dim.
Min.Typ.Max.Min.Typ.Max.
A4.304.800.1690.188
A12.402.800.0940.110
A20.030.230.0010.009
b0.801.050.0310.041
c0.450.600.0170.023
c21.171.370.0460.053
D8.959.350.3520.368
D280.315
E10.0010.400.3930.409
E18.50.3340.409
e3.203.600.1260.142
e16.607.000.2600.275
L13.7014.500.5390.571
L21.251.400.0490.055
L30.901.700.0350.067
L51.552.400.0610.094
R0.400.016
V20°8°0°8°
mm.inch.
7226255/B
21/26
Package mechanical dataLD29300xx
P2PAK/A mechanical data
Dim.
Min.Typ.Max.Min.Typ.Max.
A4.304.800.1690.188
A20.030.230.0010.009
C1.171.370.0460.053
D2.402.800.0940.110
D18.959.350.3520.368
E0.450.600.0170.023
F0.801.050.0310.041
G3.203.600.1260.142
G16.607.000.2600.275
H18.50.3340.409
H210.0010.400.3930.409
L1515.850.5900.624
L180.315
L21.271.400.0500.055
M2.43.20.0940.126
R0.400.016
V20°8°0°8°
mm.inch.
22/26
7157127/A
LD29300xxPackage mechanical data
Tape & reel D2PAK-P2PAK-D2PAK/A-P2PAK/A mechanical data
Dim.
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
mm.inch.
23/26
Order codesLD29300xx
8 Order codes
Table 11.Order codes
Packages
TO-220D
LD29300V33LD29300D2M33RLD29300P2T33RLD29300P2M33R3.3 V
LD29300V50LD29300D2T50R
1. Available on request
2
PA KD2PAK /AP2PA K
LD29300P2T15R1.5 V
LD29300D2T18RLD29300D2M18RLD29300P2T18RLD29300P2M18R1.8 V
LD29300D2M25R2.5 V
(1)
LD29300D2M50RLD29300P2T50RLD29300P2M50R5.0 V
LD29300P2T80R8.0 V
LD29300P2TRLD29300P2MTR
(1)
P2PA K/ A
(1)
Output
voltage
ADJ
24/26
LD29300xxRevision history
9 Revision history
Table 12.Document revision history
DateRevisionChanges
21-Oct-20057Order codes updated.
10-Apr-20078Order codes updated.
11-May-20079Order codes updated.
08-Jun-200710Order codes updated.
03-Apr-200811Modified: Table 11 on page 24.
11-Jul-200812Modified: Table 11 on page 24.
25/26
LD29300xx
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