µA7900 SERIES

NEGATIVEVOLTAGE REGULATORS

SLVS058D − JUNE 1976 − REVISED APRIL 2004

6

POST OFFICE BOX 655303

otherwise noted)

PARAMETER

TEST CONDITIONS

TJ†

µA7924C

UNITS

PARAMETER

TEST CONDITIONS

TJ†

MIN

TYP

MAX

UNITS

‡

25

°C

−23

−24

−25

Output voltage‡

IO = 5 mA to 1 A,

P

≤ 15 W

VI = −27 V to −38 V,

0

°C to 125°C −22.8

−25.2

V

Input regulation

VI = −27 V to −38 V

5

480

mV

Input regulation

VI = −30 V to −36 V

3

240

mV

Ripple rejection

VI = −28 V to −38 V, f = 120 Hz

0

°C to 125°C

54

60

dB

Output regulation

IO = 5 mA to 1.5 A

85

480

mV

Output regulation

IO = 250 mA to 750 mA

25

240

mV

Temperature coefficient of output voltage

IO = 5 mA

0

°C to 125°C

−1

mV/

°C

Output noise voltage

f = 10 Hz to 100 kHz

25

°C

600

µV

Dropout voltage

IO = 1 A

25

°C

1.1

V

Bias current

25

°C

2

3

mA

Bias current change

VI = −27 V to −38 V

0.04

1

mA

Bias current change

IO = 5 mA to 1 A

0.06

0.5

mA

Peak output current

25

°C

2.1

A

† Pulse-testing techniques are used to maintain the junction temperature as close to the ambient temperature as possible. Thermal effects must

be taken into account separately. All characteristics are measured with a 2-

µF capacitor across the input and a 1-µF capacitor across the output.

‡ This specification applies only for dc power dissipation permitted by absolute maximum ratings.