MC78TXX Datasheet, PDF (3/8 Pages) Fairchild Semiconductor – 3-Terminal 3A Positive Voltage Regulator

MC78TXX
Electrical Characteristics(MC78T12) (Continued)
(VI = 19V, IO = 3.0 A, 0°C ≤ TJ ≤ +125°C, Po ≤ PMAX (Note1), unless otherwise specified. )
Parameter
Symbol
Conditions
Output Voltage
Vo
5mA ≤ Io ≤ 3.0A , TJ =+25°C
14.5V ≤ VI ≤ 27V, 5mA ≤ Io ≤ 2.0A
Line Regulation (Note2)
∆VO
14.5V ≤ VI ≤ 35V, Io=5mA, TJ =+25°C
14.5V ≤ VI ≤ 35V, Io=1.0A, TJ =+25°C
14.9V ≤ VI ≤ 28V, Io =2.0A, TJ =+25°C
16V ≤ VI ≤ 22V, Io =3.0A, TJ =+25°C
Load Regulation (Note2)
∆VO
5mA ≤ Io ≤ 3.0A, TJ =+25°C
5mA ≤ Io ≤ 3.0A
Thermal Regulation
REGT
Pulse =10ms, P = 20W
TA = +25°C
Quiescent Current
IQ
5mA ≤ Io ≤ 3.0A, TJ =+25°C
5mA ≤ Io ≤ 3.0A
Quiescent Current Change
14.5V ≤ VI ≤ 35V, Io = 5mA
∆IQ TJ =+25°C ;
14.9V ≤ VI ≤ 27V, Io =2.0A ;
5mA ≤ Io ≤ 3.0A, TJ =+25°C
Ripple Rejection
RR
f = 120Hz, 15V ≤ VI ≤ 25V, Io = 2.0A
TJ =+25°C
Dropout Voltage
VD Io = 3A,TJ =+25°C
Output Noise Voltage
VN TA =+25°C, 10Hz ≤ f ≤ 100kHz
Peak Output Current
IPK TA =+25°C
Output Resistance
Ro f = 1.0kHz
Short Circuit Current Limit
Isc VI = 35V, TJ =+25°C
Average Temperature
Coefficient of Output Voltage
∆VO/∆T
Io = 5.0mA
Min.
11.5
11.4
-
-
-
-
-
-
-
-
-
-
-
-
Typ. Max. Unit
12 12.5
12 12.8
V
6.0 45 mV
10 30 mV
15 80 mV
0.002 0.03 %Vo/W
3.5 5.0 mA
4.0 6.0 mA
0.1 0.8 mA
67
-
dB
2.2 2.5
V
10
- µV/Vo
5.0
-
A
2.0
-
mΩ
1.5 2.5
A
0.5
- mV/°C
Note:
1. Although power dissipation is internally limited, specifications apply only for PO ≤ Pmax, Pmax = 25W
2. Load and line regulation are specified at constant junction temperature. Change in Vo due heating effects must be taken into
account separately. Pulse testing with low duty is used. ( PMAX = 25W)
3