MC79M18CT datasheet(7/14 Pages) FAIRCHILD

Part #	MC79M18CT

Description	3-Terminal 0.5A Negative Voltage Regulator

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Manufacturer	FAIRCHILD [Fairchild Semiconductor]

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MC79MXX

7

Electrical Characteristics (MC79M18)

(Refer to test circuit, 0

°C ≤TJ ≤ +125 °C, lO =350mA, VI = -27V,unless otherwise specified)

Note;

1. Load and line regulation are specified at constant junction temperature. Change in VO due to heating effects must be taken

into account separately. Pulse testing with low duty is used.

Parameter

Symbol

Conditions

Min.

Typ.

Max.

Unit

Output Voltage

VO

TJ= +25

°C

- 17.3

- 18

- 18.7

V

IO = 5mA to 350mA

VI = -21V to -33V

- 17.1

- 18

- 18.9

Line Regulation (Note1)

∆VO

TJ =+25

°C

VI = -21V to -33V

-

9.0

80

mV

VI = -24V to -30V

-

5.0

80

Load Regulation (Note1)

∆VO

TJ= +25

°CIO = 5.0mA to 500mA

-

30

360

mV

Quiescent Current

IQ

TJ= +25

°C-

3

6

mA

Quiescent Current Change

∆IQ

IO = 5mA to 350mA

-

0.4

mA

VI = -21V to -33V

-

0.4

Output Voltage Drift

∆VO/∆TIO = 5mA

-

-1.0

-

mV/

°C

Output Noise Voltage

VN

f = 10Hz to 100KHz,TA = +25

°C-

110

-

µV

Ripple Rejection

RR

f = 120Hz,VI = -22V to -32V

54

59

-

dB

Dropout Voltage

VD

IO = 500mA, TJ = +25

°C-

1.1

-

V

Short Circuit Current

ISC

VI = -35V, TJ = +25

°C

-

140

-

mA

Peak Current

IPK

TJ= +25

°C

-

650

-

mA

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