NTE NTE971 Datasheet

NTE971

Linear Integrated Circuit

Voltage Regulator, Negative, –24V, 1A

Description:

The NTE924 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 heat
sinking it can deliver output currents in excess of 1A. Although designed primarily as a fixed regulator ,
this device can be used with external components to obtain adjustable voltages and currents.

Features:

D No External Components Required
D Internal Thermal Overload Protection
D Internal Short–Circuit Current Limiting
D Output Transistor Safe–Area Compensation

Absolute Maximum Ratings:

Input Voltage, V

IN

Internal Power Dissipation, P

(TA = +25°C unless otherwise specified)

D

Derate Above +25°C 15.4mW/°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Internal Power Dissipation (T

= +25°C), P

C

D

Derate Above +75°C 200mW/°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Maximum Junction Temperature Range, T
Storage Temperature Range, T

stg

J

Thermal Resistance, Junction–to–Ambient, R
Thermal Resistance, Junction–to–Case, R

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

LoadTJ

TJ = +25°C –23.0 –24.0 –25.0 V
5mA ≤ IO ≤ 1A, PO ≤ 15W,

–38V ≤ V
TJ = +25°C,

Line

Note 1

Note 1

thJC

= +25°C,

thJA

–22.8 –24.0 –25.2 V

≤ –27V

IN

–38V ≤ VIN ≤ –27V – 31 480
–36V ≤ VIN ≤ –30V – 14 240
5mA ≤ IO ≤ 1.5A – 60 480
250mA ≤ IO ≤ 750mA – 25 240

–40V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Internally Limited. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Internally Limited. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–55° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–65° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

65°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

mV

mV

Electrical Characteristics: (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

B

TJ = +25°C – 4.6 8.0 mA
–38V ≤ VIN ≤ –27V – – 1.0 mA

B

5mA ≤ IO ≤ 1A – – 0.5
Ripple Rejection RR 38V ≤ VIN ≤ 28V, f = 120Hz – 54 – dB
Dropout Voltage VIN – VOTJ = +25°C, IO = 1A – 2.0 – V
Output Noise Voltage V
Output Resistance r
Short–Circuit Current Limit I
Peak Output Current I
Average Temperature

TCV

O

sc

max

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
Coefficient of Output
Voltage

Note 1. Load and line regulation are specified at constant junction temperature. Changes in V

due to heating effects must be taken into account spearately. Pulse testing with low duty
cycle is used.

.420 (10.67)

Max

O

O

.147 (3.75)

Dia Max

.070 (1.78)

Max

.100 (2.54)

GND

.110 (2.79)

(12.7)

.250 (6.35)

Max

(12.7)

V

OUT

V

/Tab

IN

.500
Max

.500

Min