MC7924CT datasheet(10/18 Pages) FAIRCHILD

Part #	MC7924CT

Description	3-Terminal 1A Negative Voltage Regulator

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Manufacturer	FAIRCHILD [Fairchild Semiconductor]

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MC79XX/MC79XXA/LM79XX

10

Electrical Characteristics (MC7924) (Continued)

(VI = -33V, IO = 500mA, 0

°C ≤TJ ≤ +125°C, CI =2.2µF, CO =1µF, unless otherwise specified.)

Note:

1. Load and line regulation are specified at constant junction temperature. Changes 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

-23

-24

-25

V

IO = 5mA to 1A, PO

≤ 15W

VI = -27V to -38V

-22.8

-24

-25.2

Line Regulation (Note1)

∆VO

TJ = +25

°C

VI = -27V to -38V

-

15

480

mV

VI = -30V to -36V

-

8

180

Load Regulation (Note1)

∆VO

TJ = +25

°C

IO = 5mA to 1.5A

-

15

480

mV

TJ = +25

°C

IO = 250mA to 750mA

-

5

240

Quiescent Current

IQ

TJ = +25

°C-

3

6

mA

Quiescent Current Change

∆IQ

IO = 5mA to 1A

-

0.05

0.5

mA

VI = -27V to -38V

-

0.1

1

Temperature Coefficient of VD

∆Vo/∆TIO = 5mA

-

-1

-

mV/

°C

Output Noise Voltage

VN

f = 10Hz to 100kHz

TA = +25

°C

-

400

-

µV

Ripple Rejection

RR

f = 120Hz

∆VI = 10V

54

60

-

dB

Dropout Voltage

VD

TJ = +25

°C

IO = 1A

-2

-

V

Short Circuit Current

ISC

TJ = +25

°C, VI = -35V

-

300

-

mA

Peak Current

IPK

TJ = +25

°C-

2.2

-

A

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