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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. MICROCIRCUITS PRODUCTS DIVISION
905 E. Walnut St., Garland, TX 75040 (972) 272-3571 Fax (972) 494-2281
www.micropac.com
E-MAIL: microsales@micropac.com
2/2/05
Pg. 1 of 3
42117
NEGATIVE HIGH TEMPERATURE
FIXED VOLTAGE REGULATOR
Designed to use in high temperature environments
Mii
Features:
Operating temperature +200
°C
Output current to 1.0 A
Input voltage to –38V
Output voltage to –30 V
Internal short circuit protection, foldback and
current limiting
Isolated TO-258 package
Applications:
Down hole
Harsh environment application
DESCRIPTION
The 42117 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 case temperatures up to +200
°C. These devices are
complete with internal short circuit protection, which includes voltage shutdown and current foldback.
It is strongly
recommended that input and output capacitors be added as close to the case as possible. A 2f capacitor should be added
to the input and a minimum of 1.5f capacitor should be added to the output. See typical connection diagram below.
ABSOLUTE MAXIMUM RATINGS AT 200°C CASE TEMPERATURE
Output Current (IOUT)................................................................................................................................... 1.0 A
Input Voltage (VIN) ................................................................................................................................. -38 VDC
Storage Temperature (TSTG) ......................................................................................................................+250°C
Power Dissipation Pd....................................................................................................................................8 W
Typical Connection Diagram
Note: D1 should be installed for input safety
D1
CASE
INPUT
OUTPUT
-
COMMON
-
2uf
3
2
1.5f
RECTIFIED
VOUT
1
REGULATED
AS REQUIRED
VIN
AS REQUIRED
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MICROCIRCUITS PRODUCTS
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