ST78L12 datasheet(2/2 Pages) SEMTECH_ELEC

Part #	ST78L12

Description	3-Terminal positive voltage regulator

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Manufacturer	SEMTECH_ELEC [SEMTECH ELECTRONICS LTD.]

Direct Link	http://www.semtech.net.cn

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Dated : 07/12/2002

®

SEMTECH ELECTRONICS LTD.

(Subsidiary of Sino-Tech International Holdings Limited, a company

listed on the Hong Kong Stock Exchange, Stock Code: 724)

ST 78L12

Electrical Characteristics

(Unless otherwise specified, VIN=19V, IOUT=40mA, CIN=0.33μF, COUT=0.1μF, Tj=25°C)

Symbol

Test Condition

Min.

Typ.

Max.

Uunit

Output Voltage

VOUT

11.5

12

12.5

V

Input Regulation

Reg. line

14.5V

≤V

IN≤27V

-

120

250

mV

16V

≤V

IN≤27V

-

100

200

Load Regulation

Reg. load

1.0mA

≤I

OUT≤100mA

-

20

100

mV

1.0mA

≤I

OUT≤40mA

-

10

50

Output Voltage

VOUT

14.5V

≤V

IN≤27V

11.4

-

12.6

V

1.0mA

≤I

OUT≤40mA

VOUT

VIN=19V

11.4

-

12.6

V

1.0mA

≤I

OUT≤70mA

Quiescent Current

IB

-

3.2

6.5

mA

Quiescent

Current

With line

ΔI

B

16V

≤V

IN≤27V

-

1.5

mA

Change

With load

1.0mA

≤I

OUT≤40mA

-

0.1

Output Noise Voltage

VNO

Ta=25

°C,

10Hz

≤f≤100KHz

-

80

-

μV

Ripple Rejection

RR

f=120Hz,

15V

≤V

IN≤25V,Tj=25°C

36

41

-

dB

Dropout Voltage

⎢V

IN-VOUT ⎢

Tj=25°C

-

1.7

-

V

Average Temperature

Coefficient of Output Voltage

TCVO

IOUT=5mA

-

1

-

mV/

°C

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