ST LM217L, LM317L User Manual

LM217L

LM317L

Low current 1.2 to 37V adjustable voltage regulator

Features

■Output voltage range: 1.2 to 37V

■Output current in excess of 100 mA

■Line regulation typ. 0.01%

■Load regulation typ. 0.1%

■Thermal overload protection

■Short circuit protection

■Output transition safe area compensation

■Floating operation for high voltage applications

Description

The LM217L/LM317L are monolithic integrated circuit in SO-8 and TO-92 packages intended for use as positive adjustable voltage regulators.

They are designed to supply until 100 mA of load current with an output voltage adjustable over a 1.2 to 37V range.

Order codes

TO-92

SO-8

The nominal output voltage is selected by means of only a resistive divider, making the device exceptionally easy to use and eliminating the stocking of many fixed regulators.

Part numbers		Packages
	SO-8 (Tape & reel)		TO-92 (BAG) (1)
LM217L	LM217LD13TR		LM217LZ
LM317L	LM317LD13TR		LM317LZ

1.Available in tape & reel with the suffix "-TR" and in Ammopak with the suffix "-AP". Please note that in these cases pins are shaped according to tape & reel specifications

May 2007

Rev. 4

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		LM217L/LM317L
	Contents
1	Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . 3
2	Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . 4
3	Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . 5
4	Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . 6
5	Typical performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . 8
6	Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . 9
7	Application circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . 10
8	Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . 12
9	Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . 17

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LM217L/LM317L	Diagram

1 Diagram

Figure 1. Schematic diagram

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Pin configuration	LM217L/LM317L

2 Pin configuration

Figure 2. Pin connections (top view for SO-8, bottom view for TO-92)

PIN 1 = ADJUST

PIN 2 = IN

PIN 3 = OUT

SO-8

TO-92

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	LM217L/LM317L			Maximum ratings
	3	Maximum ratings
	Table 1.	Absolute maximum ratings
	Symbol	Parameter		Value	Unit
	VI-VO	Input-output differential voltage		40	V
	PD	Power dissipation		Internally Limited	mW
	TOP	Operating junction temperature range	for LM217L	-40 to 125	°C
			for LM317L	0 to 125
	TSTG	Storage temperature range		-55 to 150	°C

Figure 3. Test circuit

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Electrical characteristics					LM217L/LM317L
4	Electrical characteristics
Table 2.	Electrical characteristics of LM217L (refer to the test circuits, TJ = - 40 to 125°C,
	VI - VO = 5 V, IO = 40 mA, unless otherwise specified)
Symbol	Parameter	Test conditions		Min.	Typ.	Max.	Unit
VO	Line regulation	VI - VO = 3 to 40 V	TJ = 25°C		0.01	0.02	%/V
		IL < 20 mA			0.02	0.05
		VO ≤5 V	TJ = 25°C		5	15	mV
VO	Load regulation	IO = 5 to 100 mA			20	50
		VO ≥ 5 V	TJ = 25°C		0.1	0.3	%
		IO = 5 to 100 mA			0.3	1
IADJ	Adjustment pin current				50	100	µA
IADJ	Adjustment pin current	VI - VO = 3 to 40 V, IO = 5 to 100 mA			0.2	5	µA
		Pd < 625 mW
VREF	Reference voltage	VI - VO = 3 to 40 V, IO = 10 to 500 mA		1.2	1.25	1.3	V
		Pd < 625 mW
VO/VO	Output voltage				0.7		%
	temperature stability
IO(min)	Minimum load current	VI - VO = 40 V			3.5	5	mA
IO(max)	Maximum output current	VI - VO = 3 to 13 V		100	200		mA
		VI - VO = 40 V			50
eN	Output noise voltage	B = 10 Hz to 10 KHz, TJ = 25°C			0.003		%
SVR	Supply voltage rejection (1)	TJ = 25°C	CADJ = 0		65		dB
		f = 120 Hz	CADJ = 10 µF	66	80

1. CADJ is connected between adjust pin and ground.

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