MC7900 Series
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5
MC7912B, MC7912C
ELECTRICAL CHARACTERISTICS
(V
I
= −19 V, I
O
= 500 mA, Tlow* < T
J
< +125°C, unless otherwise noted.)
Characteristics
Symbol Min Typ Max Unit
Output Voltage (T
J
= +25°C) V
O
−11.5 −12 −12.5 Vdc
Line Regulation (Note 4)
(T
J
= +25°C, I
O
= 100 mA)
−14.5 Vdc ≥ V
I
≥ −30 Vdc
−16 Vdc ≥ V
I
≥ −22 Vdc
(T
J
= +25°C, I
O
= 500 mA)
−14.5 Vdc ≥ V
I
≥ −30 Vdc
−16 Vdc ≥ V
I
≥ −22 Vdc
Reg
line
−
−
−
−
13
6.0
55
24
120
60
240
120
mV
Load Regulation, T
J
= +25°C (Note 4)
5.0 mA ≤ I
O
≤ 1.5 A
250 mA ≤ I
O
≤ 750 mA
Reg
load
−
−
46
17
240
120
mV
Output Voltage
−14.5 Vdc ≥ V
I
≥ −27 Vdc, 5.0 mA ≤ I
O
≤ 1.0 A, P ≤ 15 W
V
O
−11.4 − −12.6
Vdc
Input Bias Current (T
J
= +25°C) I
IB
− 4.4 8.0 mA
Input Bias Current Change
−14.5 Vdc ≥ V
I
≥ −30 Vdc
5.0 mA ≤ I
O
≤ 1.5 A
DI
IB
−
−
−
−
1.0
0.5
mA
Output Noise Voltage (T
A
= +25°C, 10 Hz ≤ f ≤ 100 kHz) V
n
− 75 −
mV
Ripple Rejection (I
O
= 20 mA, f = 120 Hz) RR − 61 − dB
Dropout Voltage (I
O
= 1.0 A, T
J
= +25°C) V
I
−V
O
− 1.3 − Vdc
Average Temperature Coefficient of Output Voltage
I
O
= 5.0 mA, Tlow* ≤ T
J
≤ +125°C
DV
O
/DT
− −1.0 −
mV/°C
MC7912AC
ELECTRICAL CHARACTERISTICS
(V
I
= −19 V, I
O
= 500 mA, Tlow* < T
J
< +125°C, unless otherwise noted.)
Characteristics Symbol Min Typ Max Unit
Output Voltage (T
J
= +25°C) V
O
−11.75 −12 −12.25 Vdc
Line Regulation (Note 4)
−16 Vdc ≥ V
I
≥ −22 Vdc; I
O
= 1.0 A, T
J
= +25°C
−16 Vdc ≥ V
I
≥ −22 Vdc; I
O
= 1.0 A
−14.8 Vdc ≥ V
I
≥ −30 Vdc; I
O
= 500 mA
−14.5 Vdc ≥ V
I
≥ −27 Vdc; I
O
= 1.0 A, T
J
= +25°C
Reg
line
−
−
−
−
6.0
24
24
13
60
120
120
120
mV
Load Regulation (Note 4)
5.0 mA ≤ I
O
≤ 1.5 A, T
J
= +25°C
250 mA ≤ I
O
≤ 750 mA
5.0 mA ≤ I
O
≤ 1.0 A
Reg
load
−
−
−
46
17
35
150
75
150
mV
Output Voltage
−14.8 Vdc ≥ V
I
≥ −27 Vdc, 5.0 mA ≤ I
O
≤ 1.0 A, P ≤ 15 W
V
O
−11.5 − −12.5
Vdc
Input Bias Current I
IB
− 4.4 8.0 mA
Input Bias Current Change
−15 Vdc ≥ V
I
≥ −30 Vdc
5.0 mA ≤ I
O
≤ 1.0 A
5.0 mA ≤ I
O
≤ 1.5 A, T
J
= +25°C
DI
IB
−
−
−
−
−
−
0.8
0.5
0.5
mA
Output Noise Voltage (T
A
= +25°C, 10 Hz ≤ f ≤ 100 kHz) V
n
− 75 −
mV
Ripple Rejection (I
O
= 20 mA, f = 120 Hz) RR − 61 − dB
Dropout Voltage (I
O
= 1.0 A, T
J
= +25°C) V
I
−V
O
− 1.3 − Vdc
Average Temperature Coefficient of Output Voltage
I
O
= 5.0 A, Tlow* ≤ T
J
≤ +125°C
DV
O
/DT
− −1.0 −
mV/°C
4. Load and line regulation are specified at constant junction temperature. Changes in V
O
due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
*Tlow = −40°C for MC7912B and Tlow = 0°C for MC7912C.
