NTE NTE1923 Datasheet

NTE1923

3 Terminal Negative Voltage Regulator

–18V, 1.5A

Description:

The NTE1923 is a negative 3–terminal voltage regulator in a TO3 type package suitable for numerous
applications including local, on–card regulation requiring up to 1.5A. This device features thermal
shutdown and current limiting making the NTE1920 remarkably rugged.

Although designed primarily as a fixed voltage regulator, this device can be used with external compo­nents to obtain adjustable voltages and currents.

Features:

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

Absolute Maximum Ratings:

Input Voltage , V

IN

Internal Power Dissipation (T

(TA = +25°C unless otherwise specified)

= +25°C), P

A

D

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

Derate Above 25°C 22.2mW/°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Internal Power Dissipation (T

= +25°C), P

C

D

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

Derate Above 25°C 182mW/°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating Junction Temperature Range, T
Storage Temperature Range, T

stg

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

Electrical Characteristics:

Parameter Symbol Test Conditions Min Typ Max Unit

Output Voltage V

Line Regulation Reg

Load Regulation Reg

(0° ≤ TJ ≤ +125°C, VIN = –27V, IO = 0.5Aunless otherwise specified)

TJ = +25°C –17.3 –18.0 –18.7 V

O

5mA ≤ IO ≤ 1A, –33V ≤ VIN ≤ –21V, PO ≤ 15W –17.1 –18.0 –18.9 V

lineTJ

loadTJ

= +25°C, –33V ≤ VIN ≤ –21V, Note 1 – 90 360 mV

TJ = +25°C, –30V ≤ VIN ≤ –24V, Note 1 – 50 180 mV

= +25°C, 5mA ≤ IO ≤ 1.5A, Note 1 – 110 360 mV

TJ = +25°C, 250mA ≤ IO ≤ 750mA, Note 1 – 55 180 mV

J

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

thJC

thJA

–35V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

0° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.5°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

45°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Note 1. Load and line regulation are specified at constant junction temperature. Change in VO due

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

Electrical Characteristics (Cont’d): (0° ≤ TJ ≤ +125°C, VIN = –27V, IO = 0.5Aunless otherwise

specified)

Parameter Symbol Test Conditions Min Typ Max Unit

Input Bias Current I
Input Bias Current Change I

Output Noise Voltage V
Ripple Rejection Ratio RR IO = 20mA, f = 120Hz – 59 – dB
Dropout Voltage TJ = +25°C, IO = 1A – 2.0 – V
Peak Output Current IOmax TJ = +25°C 1.3 2.5 3.3 A
Average Temperature

Coefficient of Output
Voltage

TJ = +25°C – 4.5 8.0 mA

B

–33V ≤ VIN ≤ –21V – – 1.0 mA

B

5mA ≤ IO ≤ 1.5A – – 0.5 mA
TA = +25°C, f = 10Hz to 100kHz – 110 – µV

n

IO = 5mA – –1.0 – mV/°C

Note 2. Load and line regulation are specified at constant junction temperature. Change in VO due

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

.135 (3.45) Max

.350 (8.89)

.875 (22.2)

Dia Max

.215 (5.45)

.430

(10.92)

V

OUT

GND

Seating Plane

.040 (1.02).312 (7.93) Min

1.187 (30.16)

.665

(16.9)

.156 (3.96) Dia
(2 Holes)

.188 (4.8) R Max

.525 (13.35) R Max

VIN/Case