LT8357 Datasheet | Analog Devices

FEATURES n Wide Input Voltage Range: 3V to 60V n Low IQ Burst Mode® Operation: 8µA n Up to 95% Efficiency at 2MHz n ±1.5% Internal 1V Voltage Reference n 5V Split Gate Drive for Efficiency and EMI Optimization n 100k Hz to 2MHz Fixed Switching Frequency with External Clock Synchronization n Spread Spectrum Frequency Modulation for Low EMI n Accurate Enable Threshold with Hysteresis n Programmable Output Soft-Start and Tracking n Thermally-Enhanced 12-Lead MSOP Package APPLICATIONS n Automotive and Industrial Systems n Battery-Powered Systems n Portable Electronic Equipment 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 100k Hz 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 quiescent current, the LT8357 provides a simple, pact and efficient solution for automotive, industrial, and battery-powered systems. All registered trademarks and trademarks are the property of their respective owners. TYPICAL APPLICATION 2MHz, 8V to 16V Input, 24V/2A Output Boost Converter VIN 8V TO 16V 10µF 25V 1M 196k INTVCC 100k VIN EN/UVLO SYNC/MODE LT8357 PGOOD 2.2µH GATEP GATEN SENSE 22k 10n F INTVCC 8357 TA01a 15k 47n F 2MHz 2.2µF D1 M1 5mΩ VOUT 22µF 35V 24V 2A x2 1MEG 43.2k EFFICIENCY (%) Efficiency vs Load Current 100 f SW = 2MHz...