NTE NTE972 Datasheet
NTE972
Integrated Circuit
3–Terminal Positive Voltage Regulator, 24V
The NTE972 fixed–voltage regulator is a monolithic integrated circuit in a TO220 type package designed for use in a wide variety of applications including local, on–card regulation. This regulator employs internal current limiting, thermal shutdown, and safe–area compensation. With adequate heatsinking it can deliver output currents in excess of 1.0 ampere. Although designed primarily as a fixed
voltage regulator, this device can be used with external components to obtain adjustable voltages and
currents.
Features:
D Output Current in Excess of 1.0 Ampere
D No External Components Reguired
D Internal Thermal Overload Protection
D Internal Short–Circuit Current Limiting
D Output Transistor Safe–Area Compensation
Absolute Maximum Ratings:
Input Voltage, V
Power Dissipation (T
in
= +25°C), P
A
(TA = +25°C unless otherwise specified)
D
Derate above +25°C 15.4mW/°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Dissipation (T
= +25°C), P
C
D
Derate above +75°C 200mW/°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermal Resistance, Junction–to–Ambient, R
Thermal Resistance, Junction–to–Case, R
Operating Junction Temperature Range, T
Storage Junction Temperature Range, T
Electrical Characteristics:
Parameter Symbol Test Conditions Min Typ Max Unit
Output Voltage V
Line Regulation Reg
Load Regulation Reg
(Vin = 33V, IO = 500mA, TJ = 0° to +125°C unless otherwise specified)
O
lineTJ
loadTJ
thJC
J
stg
TJ = +25°C 23 24 25 V
5mA ≤ IO ≤ 1A, PO ≤ 15W, 27V ≤ Vin ≤ 38V 22.8 24.0 25.2 V
= +25°C, Note 1 27V ≤ Vin ≤ 38V – 31 480 mV
= +25°C, Note 1 5mA ≤ IO ≤ 1.5A – 60 480 mV
thJA
40Vdc. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Internally Limited. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Internally Limited. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
65°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
–55° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
–65° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
30V ≤ Vin ≤ 36V – 14 240 mV
250mA ≤ IO ≤ 750mA – 25 240 mV
Note 1. Load and line regulation are specified at constant junction temperature. Changes in VO due
to heating effects must be taken into account separately. Pulse testing with low duty cycle
is used.
Electrical Characteristics (Cont’d): (Vin = 33V, IO = 500mA, TJ = 0° to +125°C unless otherwise
specified)
Parameter Symbol Test Conditions Min Typ Max Unit
Quiescent Current I
Quiescent Current Change ∆I
TJ = +25°C – 4.6 8.0 mA
B
27V ≤ Vin ≤ 38V – – 1.0 mA
B
5mA ≤ IO ≤ 1A – – 0.5 mA
Ripple Rejection RR 28V ≤ Vin ≤ 38V, f = 120Hz – 54 – dB
Dropout Voltage V
Output Noise Voltage V
Output Resistance r
Short–Circuit Current Limit I
Peak Output Current I
Average Temperature Coefficient
– V
in
O
sc
max
TCV
= +25°C, IO = 1A – 2 – V
OTJ
TA = +25°C, 10Hz ≤ f ≤ 100kHz – 10 – µV/V
n
f = 1kHz – 20 – mΩ
TA = +25°C, Vin = 35V – 0.2 – A
TJ = +25°C – 2.2 – A
O
– –1.5 – mV/°C
of Output Voltage
.420 (10.67)
Max
O
.147 (3.75)
Dia Max
.070 (1.78)
Max
.100 (2.54)
.110 (2.79)
GND
.500
(12.7)
Max
.250 (6.35)
Max
.500
(12.7)
Min
V
IN
V
OUT
GND
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