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 E-MAIL: hybridsales@micropac.com 08/03/01
42118 POSITIVE HIGH TEMPERATURE
FIXED VOLTAGE REGULATOR
Designed for use in high temperature environments
Mii
HYBRID MICROELECTRONICS
PRODUCTS DIVISION
Features:
• Operating temperature +200ºC
• Output current to 1.0 A
• Input voltage to +30 V
• Internal short circuit protection, foldback and
current limiting
• Isolated TO-258 package
Applications:
• Military and Hi Rel Industrial harsh environment
applications where hermetically sealed product is
required
• Down hole applications
DESCRIPTION
The 42118 series of fixed voltage regulators covers the output voltage range from +5 VDC through +30 VDC. These voltage
regulators are fabricated using hybrid techniques and will operate at temperatures up to +200ºC. These devices are
complete with internal short circuit protection, which includes voltage shutdown and current foldback. The 42118 series
voltage regulators normally do not require any additional components. However, for good design practice, an external filter
cap of 2µF should be installed at the input, as close to the case as possible.
ABSOLUTE MAXIMUM RATINGS AT 200°C CASE TEMPERATURE
Output Current (I
OUT
) ............................................................................................................................................................1.0 A
Input Voltage (V
IN
) ........................................................................................................................................................ +38 VDC
Storage Temperature (T
STG
)............................................................................................................................................. +250°C
Power Dissipation (Pd) ...........................................................................................................................................................8 W
Typical Connection Diagram
Note: D1 should be installed for input safety.
D1
INPUT
OUTPUT
+ COMMON +
2uf
RECTIFIED VOUT
REGULATED
AS REQUESTED
V
IN
AS REQUESTED
HEADER
2