Microsemi SG1526BJ-JAN

Overview

DESCRIPTION The SG1526B is a high-performance pulse width modulator for switching power supplies which offers improved functional and electrical characteristics over the industry-standard SG1526. A direct pin-for-pin replacement for the earlier device with all its features, it incorporates the following enhancements: a bandgap reference circuit for improved regulation and drift characteristics, improved undervoltage lockout, lower temperature coefficients on oscillator frequency and current-sense threshold, tighter tolerance on softstart time, much faster SHUTDOWN response, improved double-pulse supperession logic for higher speed operation, and an improved output driver design with low shoot-through current, and faster rise and fall times. This versatile device can be used to implement single-ended or push-pull switching regulators of either polarity, both transformer-less and transformer-coupled. The SG1526B is specified for operation over the full military ambient temperature range of -55°C to 150°C. The SG2526B is characterized for the industrial range of -25°C to 150°C, and the SG3526B is designed for the commercial range of 0°C to 125°C. FEATURES • 8 to 35 volt operation • 5V low drift 1% bandgap reference • 1Hz to 500KHz oscillator range • Dual 100mA source/sink • Digital current limiting • Double pulse suppression • Programmable deadtime • Improved undervoltage lockout • Single pulse metering • Programmable soft-start • Wide current limit common mode range • TTL/CMOS compatible logic ports • Symmetry correction capability • Guaranteed 6 unit synchronization • Shoot thru currents less than 100mA • Improved shutdown delay • Improved rise and fall time HIGH RELIABILITY FEATURES - SG1526B ♦ Available to MIL-STD-883 ♦ MIL-M38510/12603BVA - JAN1526BJ ♦ Radiation data available ♦ LMI level "S" processing available

Features