NTE NTE1908 Datasheet
NTE1908
Integrated Circuit
Positive 3 Terminal Voltage Regulator,
24V, 100mA
Description:
The NTE1908 voltage regulator is an inexpensive, easy–to–use device in a TO92 type p ackage s uitable
for a multitude of a pplications t hat r equire a r egulated s upply o f u p t o 1 00mA. This d evice f eatures internal
current limiting a nd t hermal s hutdown m aking t he N TE1908 r emarkably r ugged. N o e xternal c omponents
are required in many applications.
The NTE1908 offers a substantial performance advantage over the traditional zener diode–resistor
combination, as output impedance and quiescent current are substantially reduced.
Features:
D Low Cost
D ±5% Tolerance
D Internal Short–Circuit Current Limiting
D Internal Thermal Overload Protection
D No External Components Required
D Complementary to NTE1909 Negative Regulator
Absolute Maximum Ratings:
Input Voltage, V
I
(TA = +25°C unless otherwise specified)
Operating Junction Temperature Range, T
Storage Junction Temperature Range, T
Electrical Characteristics:
(VI = 33V, IO = 40mA, CI = 0.33µF, CO = 0.1µF, 0° < TJ < +125°C
stg
unless otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Unit
Output Voltage V
Line Regulation Reg
TJ = +25°C 22.1 24.0 25.9 V
O
28V ≤ VI ≤ 38V, 1mA ≤ IO ≤ 40mA 21.6 – 26.4 V
28V ≤ VI ≤ 33V, 1mA ≤ IO ≤ 70mA 21.6 – 26.4 V
TJ = +25°C,
line
IO = 40mA
40V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
J
0° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
–65° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
27.5V ≤ VI ≤ 38V – 35 350 mV
28V ≤ VI ≤ 80V – 30 300 mV
Electrical Characteristics (Cont’d): (VI = 33V, IO = 40mA, CI = 0.33µF, CO = 0.1µF,
0° < T
Parameter Symbol Test Conditions Min Typ Max Unit
< +125°C unless otherwise specified)
J
Load Regulation Reg
Input Bias Current I
Input Bias Current Change ∆I
Output Noise Voltage V
Long–Term Stability ∆VO/∆t – 56 – mV/1kHrs
Ripple Rejection RR IO = 40mA, f = 120Hz, 29V ≤ VI ≤ 35V,
Input–Output Voltage
Differential
loadTJ
IB
IB
n
VI/V
O
= +25°C 1mA ≤ IO ≤ 100mA – 40 200 mV
1mA ≤ IO ≤ 40mA – 20 100 mV
TJ = +25°C – 3.1 6.5 mA
TJ = +125°C – – 6.0 mA
28V ≤ VI ≤ 38V – – 1.5 mA
1mA ≤ IO ≤ 40mA – – 0.2 mA
TA = +25°C, 10Hz ≤ f ≤ 100kHz – 200 – µV
30 43 – dB
= +25°C
T
J
TJ = +25°C – 1.7 – V
.135 (3.45) Min
.210
(5.33)
Seating Plane
Max
.500
(12.7)
Min
.100 (2.54)
.105 (2.67) Max
.205 (5.2) Max
V
OUT
GND
V
.021 (.445) Dia Max
IN
.050 (1.27)
.165 (4.2) Max
.105 (2.67) Max
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