Datasheet

MC7900 Series
http://onsemi.com
7
MC7918C
ELECTRICAL CHARACTERISTICS
(V
I
= −27 V, I
O
= 500 mA, 0°C < T
J
< +125°C, unless otherwise noted.)
Characteristics
Symbol Min Typ Max Unit
Output Voltage (T
J
= +25°C) V
O
−17.3 −18 −18.7 Vdc
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
Reg
line
−
−
−
−
25
10
90
50
180
90
360
180
mV
Load Regulation, T
J
= +25°C (Note 6)
5.0 mA ≤ I
O
≤ 1.5 A
250 mA ≤ I
O
≤ 750 mA
Reg
load
−
−
110
55
360
180
mV
Output Voltage
−21 Vdc ≥ V
I
≥ −33 Vdc, 5.0 mA ≤ I
O
≤ 1.0 A, P ≤ 15 W
V
O
−17.1 − −18.9
Vdc
Input Bias Current (T
J
= +25°C) I
IB
− 4.5 8.0 mA
Input Bias Current Change
−21 Vdc ≥ V
I
≥ −33 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
− 110 −
mV
Ripple Rejection (I
O
= 20 mA, f = 120 Hz) RR − 59 − 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, 0°C ≤ T
J
≤ +125°C
DV
O
/DT
− −1.0 −
mV/°C
MC7924B, MC7924C
ELECTRICAL CHARACTERISTICS
(V
I
= −33 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
−23 −24 −25 Vdc
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
Reg
line
−
−
−
−
31
14
118
70
240
120
470
240
mV
Load Regulation, T
J
= +25°C (Note 6)
5.0 mA ≤ I
O
≤ 1.5 A
250 mA ≤ I
O
≤ 750 mA
Reg
load
−
−
150
85
480
240
mV
Output Voltage
−27 Vdc ≥ V
I
≥ −38 Vdc, 5.0 mA ≤ I
O
≤ 1.0 A, P ≤ 15 W
V
O
−22.8 − −25.2
Vdc
Input Bias Current (T
J
= +25°C) I
IB
− 4.6 8.0 mA
Input Bias Current Change
−27 Vdc ≥ V
I
≥ −38 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
− 170 −
mV
Ripple Rejection (I
O
= 20 mA, f = 120 Hz) RR − 56 − 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
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.