Micropac Industries cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement.

Micropac reserves the right to make changes at any time in order to improve design and to supply the best product possible.

MICROPAC INDUSTRIES, INC. HYBRID MICROELECTRONICS PRODUCTS DIVISION

• 905 E. Walnut St., Garland, TX 75040 • (972) 272-3571 • Fax (972) 494-2281

www.micropac.com

12/12/01

1

52149/52174

NEGATIVE ADJUSTABLE 5-AMP

79HG REPLACEMENT

VOLTAGE REGULATOR

Mii

HYBRID MICROELECTRONICS

PRODUCTS DIVISION

Features:

•

Replacement for 79HG

•

5.0A Output Current

•

Internal Current And Thermal Overload Protection

•

Internal Short Circuit Current Limit

•

Low Drop-Out Voltage (Typically -2.2 V @ 5.0 A)

•

50W Power Dissipation

•

Electrically Isolated Case

•

Steel TO-3 Case

Applications:

•

Designed for use in general purpose applications

where adjustability is advantageous.

•

Military and Hi Rel Industrial applications where

hermeticity is required.

ORDER INFORMATION

52149

Standard

52174

MIL-STD-883 Screened

DESCRIPTION

The 52149/52174, which is a replacement for the 79HG, is an adjustable 4-terminal voltage regulator capable of supplying in

excess of 5 A over a –24 V to -2.55 V output range. This Hybrid Voltage Regulator has been designed with all the inherent

characteristics of the monolithic 4-terminal regulator; i.e., full thermal overload and short circuit protection. It is packaged in a

hermetically sealed 4-pin, TO-3 package providing 50W power dissipation. The regulator consists of a monolithic chip

driving a discrete series-pass element and short circuit detection transistors.

ABSOLUTE MAXIMUM RATINGS

Input Voltage.........................................................................................................................................................................-35 V

Maximum Input-to-Output Voltage Differential......................................................................................................................35 V