LT4430

LT4430 Secondary-Side Optocoupler Driver www.datasheet4u.com ■ ■ ■ FEATURES 600mV Reference (1.25% Over Temperature) Wide Input Supply Range: 3V to 20V Overshoot Control Function Prevents Output Overshoot on Startup and Short-Circuit Recovery High Bandwidth Error Amplifier Permits Simple Loop Frequency Compensation Ground-Referenced OptoCoupler Drive 10mA OptoCoupler Drive with Current Limiting Low Profile (1mm) ThinSOTTM Package DESCRIPTIO ■ The LT®4430 drives the optocoupler that crosses the galvanic barrier in an isolated power supply. The IC contains a precision-trimmed reference, a high bandwidth error amplifier, an inverting gain of 6 stage to drive the optocoupler and unique overshoot control circuitry. The LT4430’s 600mV reference provides ±0.75% initial accuracy and ±1.25% tolerance over temperature. A high bandwidth 9MHz error amplifier permits simple frequency compensation and negligible phase shift at typical loop crossover frequencies. The optocoupler driver provides 10mA of output current and is short-circuit protected. A unique overshoot control function prevents output overshoot on startup and short-circuit recovery with a single capacitor. The LT4430 is available in the low profile 6-lead SOT-23 package. , LTC and LT are registered trademarks of Linear Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. ■ ■ ■ U APPLICATIO S ■ ■ ■ ■ ■ ■ 48V Input Isolated DC/DC Converters Isolated Telecommunication Power Systems Distributed Power...