Analog Devices LT8357

Description

The LT®8357 is a wide input range, current mode, DC/DC controller which can be configured as a boost, SEPIC or flyback converter. The LT8357 drives a low side N-channel power MOSFET with 5V split gate drive. The current mode architecture allows adjustable and synchronizable 100kHz to 2MHz fixed frequency operation, or internal 19% triangle spread spectrum operation for low EMI. At light load,either pulse-skipping mode or low-ripple Burst Mode operation can be selected. Additional features include output power good and output short circuit protection in SEPIC and flyback configurations.With a wide 3V to 60V input voltage range and 8μA low uiescent current, the LT8357 provides a simple, compact and efficient solution for automotive, industrial, and battery-powered systems.

Features

• Wide Input Voltage Range: 3V to 60V
• Low IQ Burst Mode® Operation: 8μA
• Up to 95% Efficiency at 2MHz
• ±1.5% Internal 1V Voltage Reference
• 5V Split Gate Drive for Efficiency and EMI Optimization
• 100kHz to 2MHz Fixed Switching Frequency withExternal Clock Synchronization
• Spread Spectrum Frequency Modulation for Low EMI
• Accurate Enable Threshold with Hysteresis
• Programmable Output Soft-Start and Tracking
• Thermally-Enhanced 12-Lead MSOP Package

Typical applications

• Battery-Powered Systems
• Portable Electronic Equipment
• Automotive and Industrial Systems

More information

• Datasheet
• IC product information