Analog Devices LT8390 | Demoboard LT Journal

Description

The LT®8390 is a synchronous 4-switch buck-boost DC/DCcontroller that regulates output voltage, input or outputcurrent from an input voltage above, below, or equal tothe output voltage. The proprietary peak-buck/peak-boostcurrent mode control scheme allows adjustable and synchronizable150kHz to 650kHz fixed frequency operation, orinternal ±15% triangle spread spectrum frequency modulationfor low EMI. With a 4V to 60V input voltage range, 0Vto 60V output voltage capability, and seamless low-noisetransitions between operation regions, the LT8390 is idealfor voltage regulator, battery and supercapacitor chargerapplications in automotive, industrial, telecom, and evenbattery-powered systems.The LT8390 provides input or output current monitor andpower good flag. Fault protection is also provided to detectoutput short-circuit condition, during which the LT8390retries, latches off, or keeps running.

Features

4-Switch Single Inductor Architecture Allows VIN Above, Below or Equal to VOUTSynchronous Switching: Up to 98% EfficiencyProprietary Peak-Buck Peak-Boost Current ModeWide VIN Range: 4V to 60V±1.5% Output Voltage Accuracy: 1V ≤ VOUT ≤ 60V±3% Input or Output Current Accuracy with MonitorSpread Spectrum Frequency Modulation for Low EMIHigh Side PMOS Load Switch DriverIntegrated Bootstrap DiodesNo Top MOSFET Refresh Noise in Buck or BoostAdjustable and Synchronizable: 150kHz to 650kHzVOUT Disconnected from VIN During ShutdownAvailable in 28-Lead TSSOP with Exposed Pad and 28-Lead QFN (4mm × 5mm)

Typical applications

• Automotive, Industrial, Telecom Systems
• High Power Battery-Powered System

More information

• Datasheet
• IC product information