LT8350 Series

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

Catalog

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

Part	Number of Outputs	Output Type	Qualification	Output Configuration	Synchronous Rectifier	Frequency - Switching [Max]	Frequency - Switching [Min]	Grade	Function	Mounting Type	Voltage - Input (Min) [Min]	Operating Temperature [Max]	Operating Temperature [Min]	Voltage - Output (Min/Fixed)	Voltage - Output (Max) [Max]	Package / Case	Supplier Device Package	Topology	Current - Output
Analog Devices LT8350RV#PBF	1	Adjustable	AEC-Q100	Positive		2 MHz	200 kHz	Automotive	Step-Up/Step-Down	Surface Mount	3 V	150 °C	-40 °C	1 V	18 V	32-TFQFN Exposed Pad 28 Leads	32-LQFN (6x4)	Buck-Boost	6 A

Catalog

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

Key Features

• 4-Switch Single Inductor Architecture Allows VINAbove, Below or Equal to VOUT

• 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

• VOUTDisconnected from VINDuring Shutdown

• Small 4mm × 6mm 32-Pin LQFN Package

• AEC-Q100 Qualified for Automotive Applications

Description

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.ApplicationsAutomotive, Industrial, Telecom SystemsVoltage Regulator with Accurate Current LimitHigh Frequency Battery-Powered SystemUSB-PD Source