LM317 datasheet(3/11 Pages) STMICROELECTRONICS

Part #	LM317

Description	1.2V TO 37V VOLTAGE REGULATOR

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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BASIC ADJUSTABLE REGULATOR

ELECTRICAL CHARACTERISTICS (Vi -Vo = 5 V, Io = 500 mA, IMAX = 1.5A and PMAX = 20W, unless

otherwise specified)

Symbol

Parameter

Test Conditions

LM117/LM217

LM317

Unit

Min.

Typ.

Max.

Min.

Typ.

Max.

∆Vo

Line Regulation

Vi -Vo = 3 to 40 V

Tj =25

oC

0.01

0.02

0.01

0. 04

%/ V

0.02

0.05

0.02

0. 07

%/ V

∆Vo

Load Regulation

Vo

≤ 5V

Io =10 mA toIMAX

Tj =25

oC5

15

5

25

mV

20

50

20

70

mV

Vo

≥ 5V

Io =10 mA toIMAX

Tj =25

oC

0.1

0. 3

0.1

0.5

%

0.3

1

0.3

1.5

%

IADJ

Adjustment Pin Current

50

100

50

100

µA

∆IADJ

Adjustment Pin Current Vi -Vo = 2.5 to 40 V

Io =10 mA toIMAX

0.2

5

0.2

5

µA

VREF

Reference Voltage

(between pin 3 and pin

1)

Vi -Vo = 2.5 to 40 V

Io =10 mA toIMAX

PD

≤ PMAX

1.21.251. 3

1.2

1.251.3

V

∆Vo

Vo

Output Voltage

Temperature Stability

11

%

Io(min)

Minimum Load Current Vi -Vo = 40 V

3.5

5

3.5

10

mA

Io(max)

Maximum Load

Current

Vi -Vo

≤ 15 V

PD <PMAX

1.52.2

A

Vi -Vo =40 V

PD <PMAX

Tj =25

oC

0.4

A

eN

Output Noise Voltage

(percentance of VO)

B = 10Hz to 10KHz

Tj =25

oC

0.003

%

SVR

Supply Voltage

Rejection (*)

Tj =25

oC

f = 120 Hz

CADJ=0

65

dB

CADJ=10

µF 66

80

66

80

dB

(*) CADJ is connected between pin 1 and ground.

Note:

(1) Unless otherwise specified the above specs, apply over the following conditions : LM 117 Tj = – 55 to 150

°C;

LM 217 Tj = – 25 to 150

°C ; LM 317 Tj = 0 to 125°C.

LM117/217/317

3/11

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