ST LD1086V18, LD1086D2T18TR, LD1086DT18TR, LD1086D2T25TR, LD1086DT25TR User Manual

LD1086xx

1.5 A adjustable and fixed low drop positive voltage regulator

Datasheet − production data

Features

■Typical dropout: 1.3 V at 1.5 A

■Three-terminal adjustable or fixed output voltage: 1.8 V, 2.5 V, 3.3 V, 5 V, 12 V

■Automotive grade (adjustable VOUT in TO-220 and DPAK packages only)

■Output current guaranteed up to 1.5 A

■Output tolerance: ± 1 % at 25 °C and ± 2 % in full temperature range

■Internal power and thermal limit

■Wide operating temperature range - 40 °C to 125 °C

■Package available: TO-220, D²PAK, D²PAK/A, DPAK and DFN8 (4x4 mm)

■Pinout compatibility with standard adjustable voltage regulators

Description

The LD1086xx is a low drop voltage regulator capable of providing up to 1.5 A of output current. Dropout is guaranteed at a maximum of 1.2 V at the maximum output current, decreasing at lower loads. The LD1086xx is pin-to-pin compatible with older 3-terminal adjustable regulators, but has better performance in terms of drop and output tolerance. The 2.85 V output version is suitable for SCSI-2 active terminations. Unlike PNP regulators, where a part of the output current is wasted as quiescent current, the LD1086xx quiescent current flows into the load, increasing efficiency. Only a 10 µF (minimum) capacitor is needed for stability. The device is available in a TO-220, D²PAK, D²PAK/A, DPAK or DFN8 (4x4

		DPAK
	TO-220
D²PAK	DFN8 (4x4)	D²PAK/A

mm) package. On-chip trimming allows the regulator to reach a very tight output voltage tolerance; within ± 1 % at 25 °C. The LD1086xx is available as automotive grade for adjustable output voltages in the TO-220 and DPAK packages. The PAT, SYL, SBL statistical tests have been performed, and the devices are qualified according to the AEC-Q100 specification for the automotive market in the temperature range of - 40 °C to 125 °C.

Table 1.	Device summary
		Part numbers
	LD1086XX	LD1086XX18	LD1086XX33
	LD1086XX12	LD1086XX25	LD1086XX50
March 2012		Doc ID 6739 Rev 27	1/44

This is information on a product in full production.

www.st.com

Contents	LD1086xx

Contents

1	Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. 5
2	Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. 6
3	Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	7
4	Schematic application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	8
5	Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	9
6	Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	17
7	Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	22
8	Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	42
9	Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	43

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LD1086xx	List of tables

List of tables

Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Table 2. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Table 3. Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Table 4. Electrical characteristics of LD1086#18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Table 5. Electrical characteristics of LD1086#25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Table 6. Electrical characteristics of LD1086#33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Table 7. Electrical characteristics of LD1086#36 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Table 8. Electrical characteristics of LD1086#50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Table 9. Electrical characteristics of LD1086#12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Table 10. Electrical characteristics of LD1086# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Table 11. Electrical characteristics of LD1086DTTRY and LD1086VY (Automotive Grade) . . . . . . . 16 Table 12. TO-220 mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Table 13. D²PAK mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Table 14. Footprint data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Table 15. D²PAK/A mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Table 16. Footprint data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Table 17. DFN8L (4x4 mm.) mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 Table 18. Reel DFN8L dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 Table 19. Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 Table 20. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

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List of figures	LD1086xx

List of figures

Figure 1. Schematic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Figure 2. Pin connections (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure 3. Application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 4. Output voltage vs. temp. (VI = 5 V). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Figure 5. Output voltage vs. temp. (VI = 15 V). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Figure 6. Output voltage vs. temperature (VI = 4.25 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Figure 7. Short circuit current vs. dropout voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Figure 8. Line regulation vs. temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Figure 9. Load regulation vs. temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Figure 10. Dropout voltage vs. temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Figure 11. Dropout voltage vs. output current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Figure 12. Adjust pin current vs. input voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Figure 13. Adjust pin current vs. temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Figure 14. Adjust pin current vs. output current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Figure 15. Quiescent current vs. output current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Figure 16. Quiescent current vs. input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Figure 17. Supply voltage rejection vs. output current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Figure 18. Supply voltage rejection vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Figure 19. Supply voltage rejection vs. temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Figure 20. Minimum load current vs. temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Figure 21. Stability for adjustable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Figure 22. Stability for 2.85 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Figure 23. Stability for 12 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 24. Line transient (VI = 12 to 13 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Figure 25. Line transient (IO = 200 mA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Figure 26. Line transient (CADJ = 1 µF) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Figure 27. Load transient . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 28. Load transient (Trise = Tfall = 10 µs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Figure 29. Thermal protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 30. Drawing dimension TO-220 (type STD-ST Dual Gauge) . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Figure 31. Drawing dimension TO-220 (type STD-ST Single Gauge) . . . . . . . . . . . . . . . . . . . . . . . . . 24 Figure 32. Drawing dimension tube for TO-220 Dual Gauge (mm.) . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Figure 33. Drawing dimension tube for TO-220 Single Gauge (mm.) . . . . . . . . . . . . . . . . . . . . . . . . . 25 Figure 34. Drawing dimension D²PAK (type STD-ST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Figure 35. Drawing dimension D²PAK (type WOOSEOK-SUBCON.) . . . . . . . . . . . . . . . . . . . . . . . . . 28 Figure 36. D²PAK footprint recommended data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Figure 37. Drawing dimension D²PAK/A (type STD-ST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Figure 38. Drawing dimension D²PAK/A (type WOOSEOK-Subcon.) . . . . . . . . . . . . . . . . . . . . . . . . . 32 Figure 39. D²PAK/A footprint recommended data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Figure 40. DFN8L package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Figure 41. DFN8L footprint - recommended data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Figure 42. DFN8L carrier tape (dimension are in mm.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 Figure 43. Reel DFN8L drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

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LD1086xx	Diagram

1 Diagram

Figure 1. Schematic diagram

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Pin configuration	LD1086xx

2 Pin configuration

Figure 2. Pin connections (top view)

TO-220	D²PAK
DPAK	D²PAK/A
	OUTPUT
	DFN8 (4X4)

Note:

The TAB is physically connected to the output (this is valid for the TO-220 package too).

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LD1086xx	Maximum ratings

3 Maximum ratings

Table 2.

Absolute maximum ratings

Symbol

Parameter

Value

Unit

VI

DC input voltage

30

V

IO

Output current

Internally Limited

mA

PD

Power dissipation

Internally Limited

mW

TSTG

Storage temperature range

-55 to +150

°C

TOP

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 condition is not implied.

Table 3.

Thermal data

Symbol

Parameter

TO-220

D²PAK

DPAK

DFN8

Unit

D²PAK/A

RthJC

Thermal resistance junction-case

5

3

8

1.5

°C/W

RthJA

Thermal resistance junction-ambient

50

62.5

33

°C/W

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Schematic application	LD1086xx

4 Schematic application

Figure 3. Application circuit

V		=	V			R2
	O			REF		1 + ------
						R
						1

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LD1086xx	Electrical characteristics

5 Electrical characteristics

VI = 4.8 V, CI = CO =10 µF, TA = -40 to 125 °C, unless otherwise specified.

Table 4.	Electrical characteristics of LD1086#18
Symbol	Parameter	Test condition	Min.	Typ.	Max.	Unit
V	Output voltage (1)	IO = 0 mA, TJ = 25°C	1.782	1.8	1.818	V
O		IO = 0 to 1.5A, VI = 3.4 to 30V	1.764	1.8	1.836	V
VO	Line regulation	IO = 0 mA, VI = 3.4 to 18V, TJ = 25°C		0.2	4	mV
		IO = 0 mA, VI = 3.4 to 15V		0.4	4	mV
VO	Load regulation	IO = 0 to 1.5A, TJ = 25°C		0.5	8	mV
		IO = 0 to 1.5A		1	16	mV
Vd	Dropout voltage	IO = 1.5A		1.3	1.5	V
Iq	Quiescent current	VI ≤ 30V		5	10	mA
Isc	Short circuit current	VI - VO = 5V	1.5	2		A
		VI - VO = 25V	0.05	0.02		A
	Thermal regulation	TA = 25°C, 30ms pulse		0.01	0.04	%/W
SVR	Supply voltage rejection	f = 120 Hz, CO = 25 µF, IO = 1.5A	60	82		dB
		VI = 6.8 ± 3V
eN	RMS Output noise voltage (% of	T = 25°C, f =10Hz to 10kHz		0.003		%
	VO)	A
S	Temperature stability			0.5		%
S	Long term stability	TA = 125°C, 1000Hrs		0.5		%

1. See short-circuit current curve for available output current at fixed dropout.

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Electrical characteristics	LD1086xx

VI = 5.5 V, CI = CO =10 µF, TA = -40 to 125 °C, unless otherwise specified.

Table 5.	Electrical characteristics of LD1086#25
Symbol	Parameter	Test condition	Min.	Typ.	Max.	Unit
V	Output voltage (1)	IO = 0 mA, TJ = 25°C	2.475	2.5	2.525	V
O		IO = 0 to 1.5A, VI = 4.1 to 30V	2.45	2.5	2.55	V
VO	Line regulation	IO = 0 mA, VI = 4.1 to 18V, TJ = 25°C		0.2	4	mV
		IO = 0 mA, VI = 4.1 to 18V		0.4	4	mV
VO	Load regulation	IO = 0 to 1.5A, TJ = 25°C		0.5	8	mV
		IO = 0 to 1.5A		1	16	mV
Vd	Dropout voltage	IO = 1.5A		1.3	1.5	V
Iq	Quiescent current	VI ≤ 30V		5	10	mA
Isc	Short circuit current	VI - VO = 5V	1.5	2		A
		VI - VO = 25V	0.05	0.2		A
	Thermal regulation	TA = 25°C, 30ms pulse		0.008	0.04	%/W
SVR	Supply voltage rejection	f = 120 Hz, CO = 25 µF, IO = 1.5A	60	81		dB
		VI = 7.5 ± 3V
eN	RMS Output noise voltage (% of	T = 25°C, f =10Hz to 10kHz		0.003		%
	VO)	A
S	Temperature stability			0.5		%
S	Long term stability	TA = 125°C, 1000Hrs		0.5		%

1. See short-circuit current curve for available output current at fixed dropout.

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LD1086xx	Electrical characteristics

VI = 6.3 V, CI = CO =10 µF, TA = -40 to 125 °C, unless otherwise specified.

Table 6.	Electrical characteristics of LD1086#33
Symbol	Parameter	Test condition	Min.	Typ.	Max.	Unit
V	Output voltage (1)	IO = 0 mA, TJ = 25°C	3.267	3.3	3.333	V
O		IO = 0 to 1.5A, VI = 4.9 to 30V	3.234	3.3	3.366	V
VO	Line regulation	IO = 0 mA, VI = 4.9 to 18V, TJ = 25°C		0.5	6	mV
		IO = 0 mA, VI = 4.9 to 18V		1	6	mV
VO	Load regulation	IO = 0 to 1.5A, TJ = 25°C		1	10	mV
		IO = 0 to 1.5A		7	25	mV
Vd	Dropout voltage	IO = 1.5A		1.3	1.5	V
Iq	Quiescent current	VI ≤ 30V		5	10	mA
Isc	Short circuit current	VI - VO = 5V	1.5	2		A
		VI - VO = 25V	0.05	0.2		A
	Thermal regulation	TA = 25°C, 30ms pulse		0.008	0.04	%/W
SVR	Supply voltage rejection	f = 120 Hz, CO = 25 µF, IO = 1.5A	60	79		dB
		VI = 8.3 ± 3V
eN	RMS Output noise voltage (% of	T = 25°C, f =10Hz to 10kHz		0.003		%
	VO)	A
S	Temperature stability			0.5		%
S	Long term stability	TA = 125°C, 1000Hrs		0.5		%

1. See short-circuit current curve for available output current at fixed dropout.

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Electrical characteristics	LD1086xx

VI = 6.6 V, CI = CO =10 µF, TA = -40 to 125 °C, unless otherwise specified.

Table 7.	Electrical characteristics of LD1086#36
Symbol	Parameter	Test condition	Min.	Typ.	Max.	Unit
V	Output voltage (1)	IO = 0 mA, TJ = 25°C	3.564	3.6	3.636	V
O		IO = 0 to 1.5A, VI = 5.2 to 30V	3.528	3.6	3.672	V
VO	Line regulation	IO = 0 mA, VI = 5.2 to 18V, TJ = 25°C		0.5	10	mV
		IO = 0 mA, VI = 5.2 to 18V		1	10	mV
VO	Load regulation	IO = 0 to 1.5A, TJ = 25°C		3	15	mV
		IO = 0 to 1.5A		7	25	mV
Vd	Dropout voltage	IO = 1.5A		1.3	1.5	V
Iq	Quiescent current	VI ≤ 30V		5	10	mA
Isc	Short circuit current	VI - VO = 5V	1.5	2		A
		VI - VO = 25V	0.05	0.2		A
	Thermal regulation	TA = 25°C, 30ms pulse		0.01	0.04	%/W
SVR	Supply voltage rejection	f = 120 Hz, CO = 25 µF, IO = 1.5A	60	78		dB
		VI = 8.6 ± 3V
eN	RMS Output noise voltage (% of	T = 25°C, f =10Hz to 10kHz		0.003		%
	VO)	A
S	Temperature stability			0.5		%
S	Long term stability	TA = 125°C, 1000Hrs		0.5		%

1. See short-circuit current curve for available output current at fixed dropout.

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LD1086xx	Electrical characteristics

VI = 8 V, CI = CO =10 µF, TA = -40 to 125 °C, unless otherwise specified.

Table 8.	Electrical characteristics of LD1086#50
Symbol	Parameter	Test condition	Min.	Typ.	Max.	Unit
V	Output voltage (1)	IO = 0 mA, TJ = 25°C	4.95	5	5.05	V
O		IO = 0 to 1.5A, VI = 6.6 to 30V	4.9	5	5.1	V
VO	Line regulation	IO = 0 mA, VI = 6.6 to 20V, TJ = 25°C		0.5	10	mV
		IO = 0 mA, VI = 6.6 to 20V		1	10	mV
VO	Load regulation	IO = 0 to 1.5A, TJ = 25°C		5	20	mV
		IO = 0 to 1.5A		10	35	mV
Vd	Dropout voltage	IO = 1.5A		1.3	1.5	V
Iq	Quiescent current	VI ≤ 30V		5	10	mA
Isc	Short circuit current	VI - VO = 5V	1.5	2		A
		VI - VO = 25V	0.05	0.2		A
	Thermal regulation	TA = 25°C, 30ms pulse		0.01	0.04	%/W
SVR	Supply voltage rejection	f = 120 Hz, CO = 25 µF, IO = 1.5A	60	75		dB
		VI = 10 ± 3V
eN	RMS Output noise voltage (% of	T = 25°C, f =10Hz to 10kHz		0.003		%
	VO)	A
S	Temperature stability			0.5		%
S	Long term stability	TA = 125°C, 1000Hrs		0.5		%

1. See short-circuit current curve for available output current at fixed dropout.

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Electrical characteristics	LD1086xx

VI = 15 V, CI = CO =10 µF, TA = -40 to 125 °C, unless otherwise specified.

Table 9.	Electrical characteristics of LD1086#12
Symbol	Parameter	Test condition	Min.	Typ.	Max.	Unit
V	Output voltage (1)	IO = 0 mA, TJ = 25°C	11.88	12	12.12	V
O		IO = 0 to 1.5A, VI = 13.8 to 30V	11.76	12	12.24	V
		IO = 0 mA, VI = 13.8 to 25V,		1	25	mV
VO	Line regulation	TJ = 25°C
		IO = 0 mA, VI = 13.8 to 25V		2	25	mV
VO	Load regulation	IO = 0 to 1.5A, TJ = 25°C		12	36	mV
		IO = 0 to 1.5A		24	72	mV
Vd	Dropout voltage	IO = 1.5A		1.3	1.5	V
Iq	Quiescent current	VI ≤ 30V		5	10	mA
Isc	Short circuit current	VI - VO = 5V	1.5	2		A
		VI - VO = 25V	0.05	0.2		A
	Thermal regulation	TA = 25°C, 30ms pulse		0.01	0.04	%/W
SVR	Supply voltage rejection	f = 120 Hz, CO = 25 µF, IO = 1.5A	54	66		dB
		VI = 17 ± 3V
eN	RMS Output noise voltage (% of	T = 25°C, f =10Hz to 10kHz		0.003		%
	VO)	A
S	Temperature stability			0.5		%
S	Long term stability	TA = 125°C, 1000Hrs		0.5		%

1. See short-circuit current curve for available output current at fixed dropout.

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Doc ID 6739 Rev 27