low-dropout voltage regulators series. These
regulators feature 400 mV dropout voltages and
very low ground current. Designed for high
current loads, these devices also find applications
in lower current, extremely low dropout-critical
systems, where their tiny dropout voltage and
ground current values are important attributes.
Typical application 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
DPAK (tape and reel)PPAK (tape and reel)SOT223
LD29080XX15LD29080DT15RLD29080PT15R1.5 V
LD29080XX18LD29080DT18RLD29080PT18R1.8 V
Output voltages
LD29080XX25LD29080DT25RLD29080PT25R2.5 V
LD29080XX33LD29080DT33RLD29080PT33RLD29080S33R3.3 V
LD29080XX50LD29080DT50RLD29080PT50R5.0 V
LD29080XX90LD29080DT90RLD29080PT90R9.0 V
LD29080XXLD29080PTRADJ
May 2012Doc ID 10918 Rev 71/24
This is information on a product in full production.
2. Not internally pulled up; in order to assure the operating condition (device in ON mode), it must be connected to a positive
voltage higher than 2 V.
(1)
(2)
211
433
5
1
Figure 4.Application circuit
* Only for version with inhibit function.
4/24Doc ID 10918 Rev 7
VO = V
(1 + R1/R2)
REF
Page 5
LD29080xxMaximum ratings
3 Maximum ratings
Table 3.Absolute maximum ratings
SymbolParameterValueUnit
V
I
V
INH
I
O
P
D
T
STG
T
OP
1. Above 14 V the device is automatically in shut-down.
DC input voltage30
Inhibit input voltage14V
Output currentInternally limitedmA
Power dissipationInternally limitedmW
Storage temperature range- 55 to 150°C
Operating 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 4.Thermal data
(1)
V
SymbolParameterDPAKPPAKSOT223Unit
R
R
thJC
thJA
Thermal resistance junction-case8825°C/W
Thermal resistance junction-ambient100100110°C/W
Doc ID 10918 Rev 75/24
Page 6
Electrical characteristicsLD29080xx
4 Electrical characteristics
IO = 10 mA, (
Note 4
) TJ = 25 °C, VI = 3.5 V, V
= 2V, CI = 330 nF, CO = 10 µF, unless
INH
otherwise specified.
Table 5.Electrical characteristics of LD29080#15
SymbolParameterTest conditionsMin.Typ.Max.Unit
V
I
V
O
ΔV
O
ΔV
O
SVRSupply voltage rejection
I
q
I
sc
V
IL
V
IH
I
INH
eNOutput noise voltageBP = 10Hz to 100kHz, IO = 100mA60µV
Operating input voltageIO = 10mA to 800mA2.513V
Output voltage
= 10mA to 800mA, VI = 3 to 7V
I
O
= -40 to 125°C
T
J
1.4851.51.515
1.4631.537
Load regulationIO = 10mA to 800mA0.21.0%
Line regulationVI = 3 to 13V0.060.5%
f = 120 Hz, V
(
Note 1
= 3.8 ± 1V, IO = 400mA
I
)
6575dB
IO = 10mA, TJ = -40 to 125°C25
Quiescent current
= 400mA, TJ = -40 to 125°C820
O
mAI
IO = 800mA, TJ = -40 to 125°C1435
V
= 13V, V
I
= GND, TJ = -40 to 125°C130180µA
INH
Short circuit currentRL = 01.2A
Control input logic lowOFF MODE, TJ = -40 to 125°C0.8V
Control input logic highON MODE, TJ = -40 to 125°C2V
Control input currentV
= 13V, TJ = -40 to 125°C510µA
INH
V
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
3Reference voltage is measured between output and GND pins, with ADJ PIN tied to V
4In order to avoid any output voltage rise within the whole operating temperature range, due
to output leakage current, a minimum load current of 2 mA is required.
6/24Doc ID 10918 Rev 7
.
O
Page 7
LD29080xxElectrical characteristics
IO = 10 mA, (
Note 4
) TJ = 25 °C, VI = 3.5 V, V
= 2 V, CI = 330 nF, CO = 10 µF, unless
INH
otherwise specified.
Table 6.Electrical characteristics of LD29080#18
SymbolParameterTest conditionsMin.Typ.Max.Unit
V
I
V
O
ΔV
O
ΔV
O
SVRSupply voltage rejection
V
DROP
I
q
I
sc
V
IL
V
IH
I
INH
eNOutput noise voltageB
Operating input voltageIO = 10mA to 800mA2.513V
Output voltage
IO = 10mA to 800mA, VI = 3 to 7.3V
T
= -40 to 125°C
J
1.7821.81.818
1.7551.845
Load regulationIO = 10mA to 800mA0.21.0%
Line regulationVI = 3 to 13V0.060.5%
Dropout voltage
f = 120 Hz, VI = 3.8 ± 1V, IO = 400mA
Note 1
)
(
IO = 150mA, TJ = -40 to 125°C (
Note 2
Note 2
I
= 800mA, TJ = -40 to 125°C (
O
I
= 10mA, TJ = -40 to 125°C25
O
Note 2
6272dB
)0.1
)0.2
)0.40.7
mAIO = 400mA, TJ = -40 to 125°C820
Quiescent current
I
= 800mA, TJ = -40 to 125°C1435
O
V
= 13V, V
I
= GND, TJ = -40 to 125°C130180µA
INH
Short circuit currentRL = 01.2A
Control input logic lowOFF MODE, TJ = -40 to 125°C0.8V
Control input logic highON MODE, TJ = -40 to 125°C2V
Control input currentV
= 13V, TJ = -40 to 125°C510µA
INH
= 10Hz to 100kHz, IO = 100mA72µV
P
V
VIO = 400mA, TJ = -40 to 125°C (
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
3Reference voltage is measured between output and GND pins, with ADJ PIN tied to V
4In order to avoid any output voltage rise within the whole operating temperature range, due
to output leakage current, a minimum load current of 2 mA is required.
+ 1 V applied to VI.
O
.
O
Doc ID 10918 Rev 77/24
Page 8
Electrical characteristicsLD29080xx
IO = 10 mA, (
Note 4
) TJ = 25 °C, VI = 4.5 V, V
= 2 V, CI = 330 nF, CO = 10 µF, unless
INH
otherwise specified.
Table 7.Electrical characteristics of LD29080#25
SymbolParameterTest conditionsMin.Typ.Max.Unit
V
I
V
O
ΔV
O
ΔV
O
SVRSupply voltage rejection
V
DROP
I
q
I
sc
V
IL
V
IH
I
INH
eNOutput noise voltageB
Operating input voltageIO = 10mA to 800mA13V
Output voltage
IO = 10mA to 800mA, VI = 3.5 to 8V
T
= -40 to 125°C
J
2.4752.52.525
2.4382.562
Load regulationIO = 10mA to 800mA0.21.0%
Line regulationVI = 3.5 to 13V0.060.5%
Dropout voltage
f = 120 Hz, VI = 4.5 ± 1V, IO = 400mA
Note 1
)
(
IO = 150mA, TJ = -40 to 125°C (
Note 2
Note 2
I
= 800mA, TJ = -40 to 125°C (
O
I
= 10mA, TJ = -40 to 125°C25
O
Note 2
5570dB
)0.1
)0.2
)0.40.7
mAIO = 400mA, TJ = -40 to 125°C820
Quiescent current
I
= 800mA, TJ = -40 to 125°C1435
O
V
= 13V, V
I
= GND, TJ = -40 to 125°C130180µA
INH
Short circuit currentRL = 01.2A
Control input logic lowOFF MODE, TJ = -40 to 125°C0.8V
Control input logic highON MODE, TJ = -40 to 125°C2V
Control input currentV
= 13V, TJ = -40 to 125°C510µA
INH
= 10Hz to 100kHz, IO = 100mA100µV
P
V
VIO = 400mA, TJ = -40 to 125°C (
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
3Reference voltage is measured between output and GND pins, with ADJ PIN tied to V
4In order to avoid any output voltage rise within the whole operating temperature range, due
to output leakage current, a minimum load current of 2 mA is required.
8/24Doc ID 10918 Rev 7
.
O
Page 9
LD29080xxElectrical characteristics
IO = 10 mA, (
Note 4
) TJ = 25 °C, VI = 5.3 V, V
= 2 V, CI = 330 nF, CO = 10 µF, unless
INH
otherwise specified.
Table 8.Electrical characteristics of LD29080#33
SymbolParameterTest conditionsMin.Typ.Max.Unit
V
I
V
O
ΔV
O
ΔV
O
SVRSupply voltage rejection
V
DROP
I
q
I
sc
V
IL
V
IH
I
INH
eNOutput noise voltageB
Operating input voltageIO = 10mA to 800mA13V
Output voltage
IO = 10mA to 800mA, VI = 4.3 to 8.8V
T
= -40 to 125°C
J
3.2673.33.333
3.2183.382
Load regulationIO = 10mA to 800mA0.21.0%
Line regulationVI = 4.3 to 13V0.060.5%
Dropout voltage
f = 120 Hz, VI = 5.3 ± 1V, IO = 400mA
Note 1
)
(
IO = 150mA, TJ = -40 to 125°C (
Note 2
Note 2
I
= 800mA, TJ = -40 to 125°C (
O
I
= 10mA, TJ = -40 to 125°C25
O
Note 2
5267dB
)0.1
)0.2
)0.40.7
mAIO = 400mA, TJ = -40 to 125°C820
Quiescent current
I
= 800mA, TJ = -40 to 125°C1435
O
V
= 13V, V
I
= GND, TJ = -40 to 125°C130180µA
INH
Short circuit currentRL = 01.2A
Control input logic lowOFF MODE, TJ = -40 to 125°C0.8V
Control input logic highON MODE, TJ = -40 to 125°C2V
Control input currentV
= 13V, TJ = -40 to 125°C510µA
INH
= 10Hz to 100kHz, IO = 100mA132µV
P
V
VIO = 400mA, TJ = -40 to 125°C (
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
3Reference voltage is measured between output and GND pins, with ADJ PIN tied to V
4In order to avoid any output voltage rise within the whole operating temperature range, due
to output leakage current, a minimum load current of 2 mA is required.
+ 1 V applied to VI.
O
.
O
Doc ID 10918 Rev 79/24
Page 10
Electrical characteristicsLD29080xx
IO = 10 mA, (
Note 4
) TJ = 25 °C, VI = 7 V, V
= 2 V, CI = 330 nF, CO = 10 µF, unless
INH
otherwise specified.
Table 9.Electrical characteristics of LD29080#50
SymbolParameterTest conditionsMin.Typ.Max.Unit
V
I
V
O
ΔV
O
ΔV
O
SVRSupply voltage rejection
V
DROP
I
q
I
sc
V
IL
V
IH
I
INH
eNOutput noise voltageB
Operating input voltageIO = 10mA to 800mA13V
Output voltage
IO = 10mA to 800mA, VI = 6 to 10.5V
T
= -40 to 125°C
J
4.9555.05
4.8755.125
Load regulationIO = 10mA to 800mA0.21.0%
Line regulationVI = 6 to 13V0.060.5%
Dropout voltage
f = 120 Hz, VI = 7 ± 1V, IO = 400mA
Note 1
)
(
IO = 150mA, TJ = -40 to 125°C (
Note 2
Note 2
I
= 800mA, TJ = -40 to 125°C (
O
I
= 10mA, TJ = -40 to 125°C25
O
Note 2
4964dB
)0.1
)0.2
)0.40.7
mAIO = 400mA, TJ = -40 to 125°C820
Quiescent current
I
= 800mA, TJ = -40 to 125°C1435
O
V
= 13V, V
I
= GND, TJ = -40 to 125°C130180µA
INH
Short circuit currentRL = 01.2A
Control input logic lowOFF MODE, TJ = -40 to 125°C0.8V
Control input logic highON MODE, TJ = -40 to 125°C2V
Control input currentV
= 13V, TJ = -40 to 125°C510µA
INH
= 10Hz to 100kHz, IO = 100mA180µV
P
V
VIO = 400mA, TJ = -40 to 125°C (
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
3Reference voltage is measured between output and GND pins, with ADJ PIN tied to V
4In order to avoid any output voltage rise within the whole operating temperature range, due
to output leakage current, a minimum load current of 2 mA is required.
10/24Doc ID 10918 Rev 7
.
O
Page 11
LD29080xxElectrical characteristics
IO = 10 mA, (
Note 4
) TJ = 25 °C, VI = 10 V, V
= 2 V, CI = 330 nF, CO = 10 µF, unless
INH
otherwise specified)
Table 10.Electrical characteristics of LD29080#80
SymbolParameterTest conditionsMin.Typ.Max.Unit
V
I
V
O
ΔV
O
ΔV
O
SVRSupply voltage rejection
V
DROP
I
q
I
sc
V
IL
V
IH
I
INH
eNOutput noise voltageB
Operating input voltageIO = 10mA to 800mA13V
Output voltage
IO = 10mA to 800mA, VI = 9 to 13V
T
= -40 to 125°C
J
7.9288.08
7.808.20
Load regulationIO = 10mA to 800mA0.21.0%
Line regulationVI = 9 to 13V0.060.5%
Dropout voltage
f = 120 Hz, VI = 10 ± 1V, IO = 400mA
Note 1
)
(
IO = 150mA, TJ = -40 to 125°C (
Note 2
Note 2
I
= 800mA, TJ = -40 to 125°C (
O
I
= 10mA, TJ = -40 to 125°C25
O
Note 2
4559dB
)0.1
)0.2
)0.40.7
mAIO = 400mA, TJ = -40 to 125°C820
Quiescent current
I
= 800mA, TJ = -40 to 125°C1435
O
V
= 13V, V
I
= GND, TJ = -40 to 125°C130180µA
INH
Short circuit currentRL = 01.2A
Control input logic lowOFF MODE, TJ = -40 to 125°C0.8V
Control input logic highON MODE, TJ = -40 to 125°C2V
Control input currentV
= 13V, TJ = -40 to 125°C510µA
INH
= 10Hz to 100kHz, IO = 100mA320µV
P
V
VIO = 400mA, TJ = -40 to 125°C (
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
3Reference voltage is measured between output and GND pins, with ADJ PIN tied to V
4In order to avoid any output voltage rise within the whole operating temperature range, due
to output leakage current, a minimum load current of 2 mA is required.
+ 1 V applied to VI.
O
.
O
Doc ID 10918 Rev 711/24
Page 12
Electrical characteristicsLD29080xx
IO = 10 mA, (
Note 4
) TJ = 25 °C, VI = 11 V, V
= 2 V, CI = 330 nF, CO = 10 µF, unless
INH
otherwise specified.
Table 11.Electrical characteristics of LD29080#90
SymbolParameterTest conditionsMin.Typ.Max.Unit
V
I
V
O
ΔV
O
ΔV
O
SVRSupply voltage rejection
V
DROP
I
q
I
sc
V
IL
V
IH
I
INH
eNOutput noise voltageB
Operating input voltageIO = 10mA to 800mA13V
Output voltage
IO = 10mA to 800mA, VI = 9 to 13V
T
= -40 to 125°C
J
8.9199.09
8.7759.225
Load regulationIO = 10mA to 800mA0.21.0%
Line regulationVI = 10 to 13V0.060.5%
Dropout voltage
f = 120 Hz, VI = 11 ± 1V, IO = 400mA
Note 1
)
(
IO = 150mA, TJ = -40 to 125°C (
Note 2
Note 2
I
= 800mA, TJ = -40 to 125°C (
O
I
= 10mA, TJ = -40 to 125°C25
O
Note 2
4357dB
)0.1
)0.2
)0.40.7
mAIO = 400mA, TJ = -40 to 125°C820
Quiescent current
I
= 800mA, TJ = -40 to 125°C1435
O
V
= 13V, V
I
= GND, TJ = -40 to 125°C130180µA
INH
Short circuit currentRL = 01.2A
Control input logic lowOFF MODE, TJ = -40 to 125°C0.8V
Control input logic highON MODE, TJ = -40 to 125°C2V
Control input currentV
= 13V, TJ = -40 to 125°C510µA
INH
= 10Hz to 100kHz, IO = 100mA330µV
P
V
VIO = 400mA, TJ = -40 to 125°C (
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
3Reference voltage is measured between output and GND pins, with ADJ PIN tied to V
4In order to avoid any output voltage rise within the whole operating temperature range, due
to output leakage current, a minimum load current of 2 mA is required.
12/24Doc ID 10918 Rev 7
.
O
Page 13
LD29080xxElectrical characteristics
IO = 10 mA, (
Note 4
) TJ = 25 °C, VI = 10 V, V
= 2 V, CI = 330 nF, CO = 10 µF, unless
INH
otherwise specified.
Table 12.Electrical characteristics of LD29080#ADJ
SymbolParameterTest conditionsMin.Typ.Max.Unit
V
I
ΔV
O
ΔVOLine regulationVI = 2.5 to 13V, IO = 10mA0.060.5%
V
REF
SVRSupply voltage rejection
I
q
I
ADJ
I
sc
V
IL
V
IH
I
INH
eNOutput noise voltageB
Operating input voltageIO = 10mA to 800mA2.513V
Load regulationIO = 10mA to 800mA0.21.0%
Reference voltage
= 10mA to 800mA, VI = 2.5 to 6.73V
I
O
= -40 to 125°C (
T
J
f = 120 Hz, V
Note 1
)
(
I
= 10mA, TJ = -40 to 125°C25
O
Note 3
)
= 3.23 ± 1V, IO = 400mA
I
1.21771.231.2423
1.19931.2607
4575dB
mAIO = 400mA, TJ = -40 to 125°C820
Quiescent current
I
= 800mA, TJ = -40 to 125°C1435
O
V
= 13V, V
I
= GND, TJ = -40 to 125°C130180µA
INH
Adjust pin currentTJ = -40 to 125°C1µA
Short circuit currentRL = 01.2A
Control input logic lowOFF MODE, TJ = -40 to 125°C0.8V
Control input logic highON MODE, TJ = -40 to 125°C2V
Control input currentV
= 13V, TJ = -40 to 125°C510µA
INH
= 10Hz to 100kHz, IO = 100mA50µV
P
V
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
3Reference voltage is measured between output and GND pins, with ADJ PIN tied to V
4In order to avoid any output voltage rise within the whole operating temperature range, due
to output leakage current, a minimum load current of 2 mA is required.
+ 1 V applied to VI.
O
.
O
Doc ID 10918 Rev 713/24
Page 14
Typical characteristicsLD29080xx
5 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
Figure 10. Quiescent current vs. temperature
14/24Doc ID 10918 Rev 7
(V
= 3 V)
I
Page 15
LD29080xxTypical characteristics
Figure 11. Quiescent current vs. supply
voltage
Figure 13. Short circuit current vs.
temperature
Figure 12. Quiescent current vs. temperature
(V
= 3.5 V)
I
Figure 14. Adjust pin current vs. temperature
Figure 15. Supply voltage rejection vs.
temperature
Doc ID 10918 Rev 715/24
Figure 16. Output voltage vs. input voltage
Page 16
Typical characteristicsLD29080xx
Figure 17. Stability vs. C
Figure 19. Load transient
O
Figure 18. Line transient
VI = 3.5 to 13 V, IO = 10 mA, VO = 1.5 V
VI = 3.5 V, IO = 10 mA to 0.8 A, VO = 1.5 V
16/24Doc ID 10918 Rev 7
Page 17
LD29080xxPackage mechanical data
6 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®
08-May-20127Modified: pin connections for PPAK, DPAK and SOT223
.
Figure 3 on page 4
.
Doc ID 10918 Rev 723/24
Page 24
LD29080xx
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