LT8350

RECOMMENDED FOR NEW DESIGNS

40VIN, 18VOUT, 6A Synchronous Buck-Boost Silent Switcher

Analog Devices LT8350 Product Info

10 February 2026 5

Features

4-Switch Single Inductor Architecture Allows V_IN Above, Below or Equal to V_OUT
Silent Switcher^® Architecture for Low EMI
Up to 95% Efficiency at 2MHz
Proprietary Peak Current Mode
3V to 40V Input Voltage Range
1V to 18V Output Voltage Range
±1.5% Output Voltage Regulation
Output/Input Current Regulation and Monitor

Constant-Voltage/Constant-Current Regulation
High Side PMOS Load Switch Driver
No Top MOSFET Refresh Noise in Buck or Boost
200kHz to 2MHz Fixed Switching Frequency with External Frequency Synchronization and SSFM
V_OUT Disconnected from V_IN During Shutdown
Small 4mm × 6mm 32-Pin LQFN Package
AEC-Q100 Qualified for Automotive Applications

Part details & applications

The LT8350 is a monolithic 4-switch synchronous buck-boost converter with Silent Switcher architecture to minimize EMI emissions while delivering high efficiency at high switching frequency. The switcher can regulate the output voltage, input or output current from input voltages above, below, or equal to the output voltage. The proprietary peak current mode control scheme allows adjustable and synchronizable 200kHz to 2MHz fixed frequency operation, or spread spectrum frequency modulation (SSFM) operation. With 3V to 40V input voltage range, 1V to 18V output voltage capability, and seamless low noise transitions between operation regions, the LT8350 is ideal for voltage regulator, battery and supercapacitor charger applications in automotive, industrial, telecom, and battery powered systems.

The LT8350 provides input or output current monitor and power good flag. Robust fault protection is provided to detect output short-circuit condition, during which the LT8350 retries, latches off, or keeps running.

Applications

Automotive, Industrial, Telecom Systems
Voltage Regulator with Accurate Current Limit
High Frequency Battery-Powered System
USB-PD Source

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