µA7900 SERIES

NEGATIVEVOLTAGE REGULATORS

SLVS058D − JUNE 1976 − REVISED APRIL 2004

4

POST OFFICE BOX 655303

otherwise noted)

PARAMETER

TEST CONDITIONS

TJ†

µA7908C

UNITS

PARAMETER

TEST CONDITIONS

TJ†

MIN

TYP

MAX

UNITS

‡

25

°C

−7.7

−8

−8.3

Output voltage‡

IO = 5 mA to 1 A,

P

≤ 15 W

VI = −10.5 V to −23 V,

0

°C to 125°C

−7.6

−8.4

V

Input regulation

VI = −10.5 V to −25 V

12.5

160

mV

Input regulation

VI = −11 V to −17 V

4

80

mV

Ripple rejection

VI = −11.5 V to −21.5 V, f = 120 Hz

0

°C to 125°C

54

60

dB

Output regulation

IO = 5 mA to 1.5 A

15

160

mV

Output regulation

IO = 250 mA to 750 mA

5

80

mV

Temperature coefficient of output voltage

IO = 5 mA

0

°C to 125°C

−0.6

mV/

°C

Output noise voltage

f = 10 Hz to 100 kHz

25

°C

200

µV

Dropout voltage

IO = 1 A

25

°C

1.1

V

Bias current

25

°C

1.5

2

mA

Bias current change

VI = −10.5 V to −25 V

0.15

1

mA

Bias current change

IO = 5 mA to 1 A

0.08

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.

otherwise noted)

PARAMETER

TEST CONDITIONS

TJ†

µA7912C

UNITS

PARAMETER

TEST CONDITIONS

TJ†

MIN

TYP

MAX

UNITS

‡

25

°C

−11.5

−12

−12.5

Output voltage‡

IO = 5 mA to 1 A,

P

≤ 15 W

VI = −14.5 V to −27 V,

0

°C to 125°C

−11.4

−12.6

V

Input regulation

VI = −14.5 V to −30 V

5

80

mV

Input regulation

VI = −16 V to −22 V

3

30

mV

Ripple rejection

VI = −15 V to −25 V,

f = 120 Hz

0

°C to 125°C

54

60

dB

Output regulation

IO = 5 mA to 1.5 A

15

200

mV

Output regulation

IO = 250 mA to 750 mA

5

75

mV

Temperature coefficient of output voltage

IO = 5 mA

0

°C to 125°C

−0.8

mV/

°C

Output noise voltage

f = 10 Hz to 100 kHz

25

°C

300

µV

Dropout voltage

IO = 1 A

25

°C

1.1

V

Bias current

25

°C

2

3

mA

Bias current change

VI = −14.5 V to −30 V

0.04

0.5

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.