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Analog Circuit Design Volume Three by John Hamburger, Bob Dobkin

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Chapter 108

Single device provides 3.3V and 5V in surface mount

Peter Schwartz

Abstract

A circuit which uses one LTC1149 to regulate both a 3.3V and a 5V output with a 17W capability is described.

Keywords

Surface mount

LTC1149

This Design Note describes a circuit which uses one LTC1149 to regulate both a 3.3V and a 5V output with a 17W capability. The circuit presented is an improved version of the one detailed in Design Note 72 (DN72). Enhancements include an emphasis upon the use of surface mount components and an extended input voltage range (6V to 24V vs 8V to 24V).

The schematic diagram is given in Figure 108.3. For the principles of operation, please refer to DN72 (copies are available from any LTC representative). One significant ...

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