SG109/SG309

4/90 Rev 1.1 2/94

Copyright

© 1994

11861 Western Avenue

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∞ Garden Grove, CA 92841

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(714) 898-8121

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∞ FAX: (714) 893-2570

FEATURES

••••• Fully compatible with TTL and DTL

••••• Output current in excess of 1A

••••• Internal thermal overload protection

••••• No additional external components

••••• Bandgap reference voltage

••••• Foldback current limiting

HIGH RELIABILITY FEATURES-SG109

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♦ Available to MIL-STD-883

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♦ MIL - M38510 / 10701BXA - JAN109T

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♦ Radiation data available

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♦ LMI level "S" processing available

5 -VOLT FIXED VOLTAGE REGULATORS

DESCRIPTION

The SG109/SG309 is a completely self-contained 5V regulator.

Designed to provide local regualtion at currents up to 1A for digital

logic cards, this device is available in the hermetic TO-3, TO-66, TO-

39 and hermetic and plastic TO-220.

A major feature of the SG109's design is its built-in protective

features which make it essentially blowout proof. These consist of

both current limiting to control the peak currents and thermal

shutdown to protect against excessive power dissipation. With the

only added component being a possible need for an input bypass

capacitor, this regulator becomes extremely easy to apply. Utilizing

an improved Bandgap reference design, problems have been

eliminated that are normally associated with the zener diode

references, such as drift in output voltage and large changes in the

line and load regulation.

SCHEMATIC