SM625/SM626/SM627

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

••••• Equivalent to the Unitrode PIC 625, 626, 627

••••• 15A current capability

••••• Designed and characterized for switching regulator

applications such as Buck, Boost, and Buck-Boost

type

••••• Cost saving design reduces size, improves efficiency,

reduces noise and RFI

••••• High operating frequency (to > 100KHz) results in

smaller inductor-capacitor filter and improved power

supply response time

••••• High operating efficiency at 7A typical performance -

Rise and fall time < 300ns

Efficiency > 85%

••••• Electrically isolated, 4-pin, TO-66 hermetic case

HIGH RELIABILITY FEATURES

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♦ Available with high reliability processing

DESCRIPTION

The SM625/626/627 series of Power Output Stages are espe-

cially designed to be driven with standard PWM integrated

circuits to form an efficient switching power supply. The SM625,

SM626 and SM627 are optimized for non-isolated Buck and

Buck-Boost application. The hybrid circuit construction utilizes

thick film resistors on a beryllia substrate for maximum thermal

conductivity and resultant low thermal impedance. All of the

active elements in the hybrid are fully passivated.

FUNCTIONAL DIAGRAM

SM625/SM626/SM627

SWITCHING REGULATOR POWER OUTPUT STAGES