7924 THREE-TERMINAL NEGATIVE VOLTAGE REGULATOR IC

FEATURES:
- OUTPUT CURRENT IN EXCESS OF 1A;
- NO EXTERNAL COMPONENTS REQUIRED;
- INTERNAL SHORT CIRCUIT CURRENT LIMITING;
- INTERNAL THERMAL OVERLOAD PROTECTION;
- OUTPUT TRANSISTOR SAFE-AREA COMPENSATION;
- OUTPUT VOLTAGE OFFERED IN 4% TOLERANCE.

ABSOLUTE MAXIMUM RATINGS (Ta= 25° C)
Characteristic Symbol Norm Unit
Input Voltage Vin V -40
Maximum Dissipated
Power(with heat sink)
Ptot(max) W 15
Maximum Dissipated
Power(without heat sink)
Ptot(max) W 1.5
Thermal Resistance
Junction to Case
OjC °C/W 5.0
Thermal Resistance,
Junction to Air
OjA °C/W 65
Junction Temperature T
j
°C 150
TO-220








1
1 GND.
2. Input
3. Output
Tc=-45÷+70°C
ELECTRICAL CHARACTERISTICS
(Vin=-33V,Io=0.5A,Ci=2.2mkF,Co=1.0mkF,Tj=0+125°C, unless otherwise noted.)
Characteristic Symbol Norm Unit
Min TYP Max
Output Voltage(Tj=25°C) Vo -23 -25 V
Output Voltage (5.0mA≤Io≤1.0A,Po≤15W)
-27V≥Vin≥-38V
Vo
-22,8

-25,2

V
Line Regulation(Tj=+25°C, Io=0,1A)
-27 V≥Vin≥-38 V
-30V≥Vin≥-36 V
(Tj=+25°C, Io=0,5A)
-27 V≥Vin≥-38 V
-30V≥Vin≥-36 V
∆Vv

240
120

470
240

mV
Load Regulation(Tj=+25°C)
5.0mA≤Io≤1.5A
0.25A≤Io≤0.75A
∆Vi

480
240
mV
Quiescent Current(Tj=+25°C) Ib 8.0 mA
Quiescent Current Change -27 V≥Vin≥-38 V
5.0mA≤Io≤1.5 A
∆Ib
1.0
0.5
mA
Dropout Voltage (Io=1.0A,Tj=+25°C) Vi-Vo 2.0 V
Average Temperature Coefficient of Output
Voltage
TCVo 1 mV/°
C