Datasheet

www.ti.com
uA7905 Electrical Characteristics
uA7908 Electrical Characteristics
µ A7900 SERIES
NEGATIVE-VOLTAGE REGULATORS
SLVS058H – JUNE 1976 – REVISED NOVEMBER 2006
at specified virtual junction temperature, V
I
= –10 V, I
O
= 500 mA (unless otherwise noted)
µ A7905C
PARAMETER TEST CONDITIONS T
J
(1)
UNIT
MIN TYP MAX
25 ° C –4.8 –5 –5.2
I
O
= 5 mA to 1 A, V
I
= –7 V to –20 V,
Output voltage
(2)
V
P
D
≤ 15 W
0 ° C to 125 ° C –4.75 –5.25
V
I
= –7 V to –25 V 12.5 50
Input regulation mV
V
I
= –8 V to –12 V 4 15
Ripple rejection V
I
= –8 V to –12 V, f = 120 Hz 0 ° C to 125 ° C 54 60 dB
I
O
= 5 mA to 1.5 A 15 100
Output regulation mV
I
O
= 250 mA to 750 mA 5 50
Temperature coefficient of output voltage I
O
= 5 mA 0 ° C to 125 ° C –0.4 mV/ ° C
Output noise voltage f = 10 Hz to 100 kHz 25 ° C 125 µ V
Dropout voltage I
O
= 1 A 25 ° C 1.1 V
Bias current 25 ° C 1.5 2 mA
V
I
= –7 V to –25 V 0.15 0.5
Bias current change mA
I
O
= 5 mA to 1 A 0.08 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.
at specified virtual junction temperature, V
I
= –14 V, I
O
= 500 mA (unless otherwise noted)
µ A7908C
PARAMETER TEST CONDITIONS T
J
(1)
UNIT
MIN TYP MAX
25 ° C –7.7 –8 –8.3
I
O
= 5 mA to 1 A,
Output voltage
(2)
V
V
I
= –10.5 V to –23 V, P
D
≤ 15 W
0 ° C to 125 ° C –7.6 –8.4
V
I
= –10.5 V to –25 V 12.5 160
Input regulation mV
V
I
= –11 V to –17 V 4 80
Ripple rejection V
I
= –11.5 V to –21.5 V, f = 120 Hz 0 ° C to 125 ° C 54 60 dB
I
O
= 5 mA to 1.5 A 15 160
Output regulation mV
I
O
= 250 mA to 750 mA 5 80
Temperature coefficient of output voltage I
O
= 5 mA 0 ° C to 125 ° C –0.6 mV/ ° C
Output noise voltage f = 10 Hz to 100 kHz 25 ° C 200 µ V
Dropout voltage I
O
= 1 A 25 ° C 1.1 V
Bias current 25 ° C 1.5 2 mA
V
I
= –10.5 V to –25 V 0.15 1
Bias current change mA
I
O
= 5 mA to 1 A 0.08 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.
3
Submit Documentation Feedback