1940

NTE1940
Integrated Circuit
Positive Voltage Regulator,
24V, 2A
Features:
D 3 Pin Plastic Package TO3P
D Only Output Capacitor is Externally Required
D Precise Setting Voltage of ±2%
D Wide Input Voltage Range (∼45V)
D Built−in Current Foldback Protection
D Ideal Combination of Passivated Power Transistor and High Reliability Flip−Chip Circuit
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
DC Input Voltage, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45V
Power Dissipation, PC (TC =+ 25°C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50W
(No Fin) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2W
Thermal Resistance, Junction−to−Case, RthJC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2°C/W
Junction Temperature Range, Tj . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −30° to +125°C
Operating Ambient Temperature Range, Top . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −20° to +80°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −30° to +125°C
Electrical Characteristics: (TA = +25°C unless otherwise specified)
Parameter
Symbol
Test Conditions
DC Input Voltage
VIN
IO = 2A
Output Voltage
VO
VIN = 33V, IO = 0.5A
Output Current
IO
Line Regulation
ΔVLINE
Load Regulation
ΔVLOAD VIN = 33V, IO = 0 to 2A
Temperature Coefficient
VIN = 28V to 38V, IO = 0.5A
Kt
Ripple Rejection
100 to 120HZ
Min Typ Max
27
−
40
23.8 24.0 24.2
Unit
V
V
0
−
2
A
−
20
50
mV
−
120
300
mV
−
±2.5
−
mV/°C
−
60
−
dB
Foldback Current
IS1
2.4
−
−
A
Short−Circuit Current
IS2
−
−
0.6
A
External Circuit
D1
2
1
+
3
VIN
DC Input
−
C1 V
O
DC Output
Note 1. Output capacitor C1 (47 to 100μf) shall be connected directly to output terminal (Pin1)
and GND terminal (PIn3) as shown above.
Note 2. When wiring between the regulator and the load is long, another capacitor (47 to 100μf)
shall be added in parallel with the load.
Note 3. If there is a possibility of reverse biasing between input and output, a protection diode
(D1) is to be added. The recommended diode for D1 is NTE116.
.190 (4.82)
.615 (15.62)
VIN
.787
(20.0)
.591
(15.02)
.126 (3.22)
Dia
.787
(20.0)
VO
VIN
GND
.215 (5.47)