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