LM7908 Ver la hoja de datos (PDF) - Fairchild Semiconductor

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LM7908

3-Terminal 1A Negative Voltage Regulat

Fairchild Semiconductor 

MC79XX/MC79XXA/LM79XX

Electrical Characteristics (MC7918) (Continued)

(VI = -27V, IO = 500mA, 0°C ≤TJ ≤ +125°C, CI =2.2µF, CO =1µF, unless otherwise specified.)

Parameter

Output Voltage

Line Regulation (Note1)

Load Regulation (Note1)

Quiescent Current

Quiescent Current Change

Temperature Coefficient of VD

Output Noise Voltage

Ripple Rejection

Dropout Voltage

Short Circuit Current

Peak Current

Symbol

VO

∆VO

∆VO

IQ

∆IQ

∆Vo/∆T

VN

RR

VD

ISC

IPK

Conditions

TJ = +25°C

IO = 5mA to 1A, PO ≤ 15W

VI = -22.5V to -33V

TJ = +25°C

VI = -21V to -33V

VI = -24V to -30V

TJ = +25°C

IO = 5mA to 1.5A

TJ = +25°C

IO = 250mA to 750mA

TJ = +25°C

IO = 5mA to 1A

VI = -21V to -33V

IO = 5mA

f = 10Hz to 100kHz

TA = +25°C

f = 120Hz

∆VI = 10V

TJ = +25°C

IO = 1A

TJ = +25°C, VI = -35V

TJ = +25°C

Min. Typ. Max. Unit

-17.3 -18 -18.7

V

-17.1 -18 -18.9

- 15 360

mV

-

8 180

- 15 360

mV

-

5 180

-

3

6

mA

- 0.05 0.5

mA

- 0.1 1

- -1 - mV/°C

- 300 -

µV

54 60 -

dB

-

2

-

V

- 300 -

mA

- 2.2 -

A

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.

9

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