Document
52149/52174
79HG REPLACEMENT
NEGATIVE ADJUSTABLE 5-AMP 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 Internal Power Dissipation @Tc = 25°C ...............................................................................................................................50W Maximum Input-to-Output Voltage Differential...................................................................................................................... 35 V Operating Junction Temperature ....................................................................................................................................... 150°C Storage Temperature Range..............................................................................................................................-55°C to +150°C Pin Temperature (Soldering, 60 seconds) ......................................................................................................................... 300°C Commercial Temperature Range 52149 ..............................................................................................................0°C to +125°C Military Temperature Range 52174....................................................................................................................-55°C to +125°C
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) 494-2.