Features

• 4-Switch Single Inductor Architecture Allows V_IN Above, Below or Equal to V_OUT
• Synchronous Switching: Up to 98% Efficiency
• Proprietary Peak-Buck Peak-Boost Current Mode
• Wide V_IN Range: 4V to 60V
• ±1.5% Output Voltage Accuracy: 1V ≤ V_OUT ≤ 60V
• ±3% Input or Output Current Accuracy with Monitor
• Spread Spectrum Frequency Modulation for Low EMI
• High Side PMOS Load Switch Driver
• Integrated Bootstrap Diodes
• No Top MOSFET Refresh Noise in Buck or Boost
• Adjustable and Synchronizable: 150kHz to 650kHz
• V_OUT Disconnected from V_IN During Shutdown
• Available in 28-Lead TSSOP with Exposed Pad and 28-Lead QFN (4mm × 5mm)

Typical Application

Description

The LT®8390 is a synchronous 4-switch buck-boost DC/DC controller that regulates output voltage, input or output current from an input voltage above, below, or equal to the output voltage. The proprietary peak-buck/peak-boost current mode control scheme allows adjustable and synchronizable 150kHz to 650kHz fixed frequency operation, or internal ±15% triangle spread spectrum frequency modulation for low EMI. With a 4V to 60V input voltage range, 0V to 60V output voltage capability, and seamless low-noise transitions between operation regions, the LT8390 is ideal for voltage regulator, battery and supercapacitor charger applications in automotive, industrial, telecom, and even battery-powered systems.

The LT8390 provides input or output current monitor and power good flag. Fault protection is also provided to detect output short-circuit condition, during which the LT8390 retries, latches off, or keeps running.