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uA7912 Electrical Characteristics
µ A7900 SERIES
NEGATIVE-VOLTAGE REGULATORS
SLVS058H – JUNE 1976 – REVISED NOVEMBER 2006
at specified virtual junction temperature, V
I
= –19 V, I
O
= 500 mA (unless otherwise noted)
µ A7912C
PARAMETER TEST CONDITIONS T
J
(1)
UNIT
MIN TYP MAX
25 ° C –11.5 –12 –12.5
I
O
= 5 mA to 1 A,
Output voltage
(2)
V
V
I
= –14.5 V to –27 V, P
D
≤ 15 W
0 ° C to 125 ° C –11.4 –12.6
V
I
= –14.5 V to –25 V 5 80
Input regulation mV
V
I
= –16 V to –22 V 3 30
Ripple rejection V
I
= –15 V to –25 V, f = 120 Hz 0 ° C to 125 ° C 54 60 dB
I
O
= 5 mA to 1.5 A 15 200
Output regulation mV
I
O
= 250 mA to 750 mA 5 75
Temperature coefficient of output voltage I
O
= 5 mA 0 ° C to 125 ° C –0.8 mV/ ° C
Output noise voltage f = 10 Hz to 100 kHz 25 ° C 300 µ V
Dropout voltage I
O
= 1 A 25 ° C 1.1 V
Bias current 25 ° C 2 3 mA
V
I
= –14.5 V to –25 V 0.04 0.5
Bias current change mA
I
O
= 5 mA to 1 A 0.06 0.5
Peak output current 25 ° C 2.1 A
(1) Pulse-testing techniques 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- µ F capacitor across the input and a 1- µ F capacitor across the
output.
(2) This specification applies only for dc power dissipation permitted by absolute maximum ratings.
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