LM317K datasheet(7/25 Pages) STMICROELECTRONICS

部件名	LM317K

功能描述	1.2 V to 37 V adjustable voltage regulators

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制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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LM117/LM217/LM317

Electrical characteristics

7/25

Table 5.

Electrical characteristics for LM317 (VI - VO = 5 V, IO = 500 mA, IMAX = 1.5 A and

PMAX = 20 W, TJ = 0 to 125°C, unless otherwise specified)

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

ΔVO

Line regulation

VI - VO = 3 to 40 V

TJ = 25°C

0.01

0.04

%/V

0.02

0.07

ΔVO

Load regulation

VO ≤5 V

IO = 10 mA to IMAX

TJ = 25°C

5

25

mV

20

70

VO ≥5 V,

IO = 10 mA to IMAX

TJ = 25°C

0.1

0.5

%

0.3

1.5

IADJ

Adjustment pin current

50

100

µA

ΔIADJ

Adjustment pin current

VI - VO = 2.5 to 40V,

IO = 10 mA to 500mA

0.2

5

µA

VREF

Reference voltage

(between pin 3 and pin 1)

VI - VO = 2.5 to 40V IO = 10 mA to 500mA

PD ≤PMAX

1.21.251.3

V

ΔVO/VO

Output voltage

temperature stability

1%

IO(min)

Minimum load current

VI - VO = 40 V

3.5

10

mA

IO(max)

Maximum load current

VI - VO ≤15 V, PD < PMAX

1.5

2.2

A

VI - VO = 40 V, PD < PMAX, TJ = 25°C

0.4

eN

Output noise voltage

(percentage of VO)

B = 10Hz to 100kHz, TJ = 25°C

0.003

%

SVR

Supply voltage rejection (1) TJ = 25°C, f = 120Hz

CADJ=0

65

dB

CADJ=10µF

66

80

1.

CADJ is connected between pin 1 and ground.

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