52150/52175
78HGA REPLACEMENT
POSITIVE ADJUSTABLE 5-AMP
VOLTAGE REGULATOR
Mii
HYBRID MICROELECTRONICS
PRODUCTS DIVISION
Features:
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Replacement for 78HGA
5.0 A Output Current
Internal Current And Thermal Limiting
Internal Short Circuit Current Limit
Low Drop-Out Voltage (Typically 2.3 V @ 5.0
A)
50W Power Dissipation
Electrically Isolated Case
Steel TO-3 Case
Applications:
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Designed for use in general purpose
applications where adjustability is
advantageous.
Military and Hi Rel Industrial applications where
hermeticity is required.
ORDER INFORMATION
52150
52175
DESCRIPTION
The 52150/52175, which is a replacement for the 78HGA, is an adjustable 4-terminal positive voltage regulator
capable of supplying in excess of 5.0 A over a 5.0 V to 24 V output range. Only two external resistors are required to
set the output voltage. It is packaged in a hermetically sealed TO-3, and provides 50W power dissipation. The
regulator consists of a monolithic chip driving a discrete series-pass element. A beryllium-oxide substrate is used in
conjunction with an isothermal layout to optimize the thermal characteristics of each device and still maintain electrical
isolation between the various chips. This unique circuit design limits the maximum junction temperature of the power
output transistor to provide full automatic thermal overload protection. If the safe operating area is ever exceeded
(Note 1), the device simply shuts down rather than fail or damage other system components. This feature eliminates
the need to design costly regulators built from discrete components.
Standard
MIL-STD-883 Screened
ABSOLUTE MAXIMUM RATINGS
Input Voltage.................................................................................................................................................................40 V
Internal Power Dissipation @T
c
= 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 52150 .....................................................................................................0°C to +125°C
Military Temperature Range 52175 ......................................................................................................... -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
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905 E. Walnut St., Garland, TX 75040
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(972) 272-3571
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Fax (972) 494-2281
www.micropac.com
E-MAIL:
hybridsales@micropac.com
12/13/01
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MII [ Micropac Industries ]
