MC7900 Series
MC7918C
ELECTRICAL CHARACTERISTICS
(V
I
= − 27 V, I
O
= 500 mA, 0°C < T
J
< +125°C, unless otherwise noted.)
Characteristics
Output Voltage (T
J
= +25°C)
Line Regulation (Note 6)
(T
J
= +25°C, I
O
= 100 mA)
−21 Vdc
≥
V
I
≥
− 33 Vdc
−24 Vdc
≥
V
I
≥
− 30 Vdc
(T
J
= +25°C, I
O
= 500 mA)
−21 Vdc
≥
V
I
≥
− 33 Vdc
−24 Vdc
≥
V
I
≥
− 30 Vdc
Load Regulation, T
J
= +25°C (Note 6)
5.0 mA
≤
I
O
≤
1.5 A
250 mA
≤
I
O
≤
750 mA
Output Voltage
−21 Vdc
≥
V
I
≥
− 33 Vdc, 5.0 mA
≤
I
O
≤
1.0 A, P
≤
15 W
Input Bias Current (T
J
= +25°C)
Input Bias Current Change
−21 Vdc
≥
V
I
≥
− 33 Vdc
5.0 mA
≤
I
O
≤
1.5 A
Output Noise Voltage (T
A
= +25°C, 10 Hz
≤
f
≤
100 kHz)
Ripple Rejection (I
O
= 20 mA, f = 120 Hz)
Dropout Voltage (I
O
= 1.0 A, T
J
= +25°C)
Average Temperature Coefficient of Output Voltage
I
O
= 5.0 mA, 0°C
≤
T
J
≤
+125°C
Symbol
V
O
Reg
line
−
−
−
−
Reg
load
−
−
V
O
−17.1
I
IB
DI
IB
−
−
V
n
RR
V
I
−V
O
DV
O
/DT
−
−1.0
−
−
−
−
−
−
110
59
2.0
1.0
0.5
−
−
−
mV
dB
Vdc
mV/°C
−
−
4.5
−18.9
8.0
mA
mA
110
55
360
180
Vdc
25
10
90
50
180
90
360
180
mV
Min
−17.3
Typ
−18
Max
−18.7
Unit
Vdc
mV
MC7924B, MC7924C
ELECTRICAL CHARACTERISTICS
(V
I
= − 33 V, I
O
= 500 mA, Tlow* < T
J
< +125°C, unless otherwise noted.)
Characteristics
Output Voltage (T
J
= +25°C)
Line Regulation (Note 6)
(T
J
= +25°C, I
O
= 100 mA)
−27 Vdc
≥
V
I
≥
− 38 Vdc
−30 Vdc
≥
V
I
≥
− 36 Vdc
(T
J
= +25°C, I
O
= 500 mA)
−27 Vdc
≥
V
I
≥
− 38 Vdc
−30 Vdc
≥
V
I
≥
− 36 Vdc
Load Regulation, T
J
= +25°C (Note 6)
5.0 mA
≤
I
O
≤
1.5 A
250 mA
≤
I
O
≤
750 mA
Output Voltage
−27 Vdc
≥
V
I
≥
− 38 Vdc, 5.0 mA
≤
I
O
≤
1.0 A, P
≤
15 W
Input Bias Current (T
J
= +25°C)
Input Bias Current Change
−27 Vdc
≥
V
I
≥
− 38 Vdc
5.0 mA
≤
I
O
≤
1.5 A
Output Noise Voltage (T
A
= +25°C, 10 Hz
≤
f
≤
100 kHz)
Ripple Rejection (I
O
= 20 mA, f = 120 Hz)
Dropout Voltage (I
O
= 1.0 A, T
J
= +25°C)
Average Temperature Coefficient of Output Voltage
I
O
= 5.0 mA, Tlow*
≤
T
J
≤
+125°C
Symbol
V
O
Reg
line
−
−
−
−
Reg
load
−
−
V
O
−22.8
I
IB
DI
IB
−
−
V
n
RR
V
I
−V
O
DV
O
/DT
−
−1.0
−
−
−
−
−
−
170
56
2.0
1.0
0.5
−
−
−
mV
dB
Vdc
mV/°C
−
−
4.6
−25.2
8.0
mA
mA
150
85
480
240
Vdc
31
14
118
70
240
120
470
240
mV
Min
−23
Typ
−24
Max
−25
Unit
Vdc
mV
6. 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 MC7924B and Tlow = 0°C for MC7924C.
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