SG3526B Datasheet, Microsemi

it incorporates the following enhancements: a bandgap reference circuit for improved regulation and drift characteristics, improved undervoltage lockout, lower temperatu.

The SG1526B is a high-performance pulse width modulator for switching power supplies which offers improved functional and electrical characteristics over the industrystandard SG1526. A direct pin-for-pin replacement for the earlier device with all it.