MC7900 Series
1.0 A Negative Voltage
Regulators
The MC7900 series of fixed output negative voltage regulators are
intended as complements to the popular MC7800 series devices.
These negative regulators are available in the same sevenvoltage
MC7900 Series
MAXIMUM RATINGS (T = +25C, unless otherwise noted.)
A
Rating Symbol Value Unit
Input Voltage ( 5.0 V V 18 V) V 35 Vdc
O I
Input Voltage (24 V) 40
Power Dissipation
Case 221A
T = +25C P Internally Limited W
A D
Thermal Resistance, JunctiontoAmbient 65 C/W
JA
Thermal Resistance, JunctiontoCase 5.0 C/W
JC
2
Case 936 (D PAK)
T = +25C P Internally Limited W
A D
Thermal Resistance, JunctiontoAmbient 70 C/W
JA
Thermal Resistance, JunctiontoCase 5.0 C/W
JC
Storage Junction Temperature Range T 65 to +150 C
stg
Junction Temperature T +150 C
J
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
*This device series contains ESD protection and exceeds the following tests:
Human Body Model 2000 V per MIL_STD_883, Method 3015
Machine Model Method 200 V
MC7905B, MC7905C
ELECTRICAL CHARACTERISTICS (V = 10 V, I = 500 mA, Tlow* < T < +125C, unless otherwise noted.)
I O J
Characteristics Symbol Min Typ Max Unit
Output Voltage (T = +25C) V 4.8 5.0 5.2 Vdc
J O
Line Regulation (Note 1) Reg mV
line
(T = +25C, I = 100 mA)
J O
7.0 Vdc V 25 Vdc 7.0 50
I
8.0 Vdc V 12 Vdc 2.0 25
I
(T = +25C, I = 500 mA)
J O
7.0 Vdc V 25 Vdc 35 100
I
8.0 Vdc V 12 Vdc 8.0 50
I
Load Regulation, T = +25C (Note 1) Reg mV
J load
5.0 mA I 1.5 A 11 100
O
250 mA I 750 mA 4.0 50
O
Output Voltage V Vdc
O
7.0 Vdc V 20 Vdc, 5.0 mA I 1.0 A, P 15 W 4.75 5.25
I O
Input Bias Current (T = +25C) I 4.3 8.0 mA
J IB
Input Bias Current Change I mA
IB
7.0 Vdc V 25 Vdc 1.3
I
5.0 mA I 1.5 A 0.5
O
Output Noise Voltage (T = +25C, 10 Hz f 100 kHz) V 40 V
A n
Ripple Rejection (I = 20 mA, f = 120 Hz) RR 70 dB
O
Dropout Voltage V V Vdc
I O
I = 1.0 A, T = +25C 1.3
O J
Average Temperature Coefficient of Output Voltage V /T mV/C
O
I = 5.0 mA, Tlow* T +125C 1.0
O J
1. Load and line regulation are specified at constant junction temperature. Changes in V due to heating effects must be taken into account
O
separately. Pulse testing with low duty cycle is used.
*Tlow = 40C for MC7905B and Tlow = 0C for MC7905C.