GENERAL DESCRIPTION

The LT8350S is a monolithic 4-switch synchronous

buck-boost converter with second-generation Silent

Switcher architecture to minimize electromagnetic

interference (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 for the synchronization

and adjustment of 200kHz to 2MHz fixed frequency

operation or spread spectrum frequency modulation

(SSFM) operation. With a 3V to 40V input voltage

range, 1V to 18V output voltage capability, and

seamless low noise transitions between operation

regions, the LT8350S is ideal for voltage regulator,

battery, and super-capacitor charger applications in

automotive, industrial, telecom, and battery-powered

systems.

The LT8350S provide an input or output current

monitor and power good flag. Robust fault protection

is provided to detect output short-circuit conditions,

during which the LT8350S retries, latches off, or keeps

running.

FEATURES

 4-Switch Single Inductor Architecture Allows VIN

Above, Below or Equal to VOUT

 Silent Switcher® 2 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

 VOUT Disconnected from VIN During Shutdown

 Small 4mm x 6mm 32-Pin LQFN Package

 AEC-Q100 Qualified

APPLICATIONS

 Automotive, Industrial, Telecom Systems

 Voltage Regulator with Accurate Current Limit

 High-Frequency Battery-Powered System

 USB Power Delivery (USB-PD) Source