Analog Devices LT8711

Description

The LT®8711 is a multi-topology current mode PWM controllerthat can easily be configured as a synchronous buck,boost, SEPIC, ZETA or as a nonsynchronous buck-boostconverter. Its dual gate drive voltage inputs optimize gatedriver efficiency.The 15μA no-load quiescent current with the output voltagein regulation extends operating run-time in battery poweredsystems. Low ripple Burst Mode operation enables highefficiency at very light loads while maintaining low outputvoltage ripple. The LT8711's fixed switching frequency canbe set from 100kHz to 750kHz or can be synchronized toan external clock.The additional features include 100% duty cycle capabilitywhen in buck mode, a topology selection pin and adjustablesoft-start. LT8711 is available in the 20-lead TSSOP and20-lead 3mm × 4mm QFN packages.

Features

• Easily Configurable as a Synchronous Buck, Boost, SEPIC, ZETA or Nonsynchronous Buck-Boost Converter
• Wide Input Range: 4.5V to 42V (VIN Can Operate to 0V, when EXTVCC > 4.5V)
• Automatic Low Noise Burst Mode® Operation
• Low IQ in Burst Mode Operation (15μA Operating)
• Input Voltage Regulation for High Impedance Source
• 100% Duty Cycle in Dropout (Buck Mode)
• 2A Gate Drivers (BG and TG) n Adjustable Soft-Start with One Capacitor
• Frequency Programmable from 100kHz to 750kHz
• Can Be Synchronized to External Clock
• Available in 20-Lead TSSOP and 20-Lead 3mm×4mm QFN Packages

Typical applications

• Automotive Systems
• Solar Panel Power Converter
• General Purpose DC/DC Conversion
• Industrial Supplies

More information

• Datasheet
• IC product information