DESCRIPTION

The LT?8350 is a monolithic 4-switch synchronous buckboost

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.

FEATURES

- 4-Switch Single Inductor Architecture Allows VIN

Above, 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

- VOUT Disconnected from VIN During Shutdown

- Small 4mm × 6mm 32-Pin LQFN Package

- AEC-Q100 Qualification in Progress

APPLICATIONS

- Automotive, Industrial, Telecom Systems

- Voltage Regulator with Accurate Current Limit

- High Frequency Battery-Powered System

- USB-PD Source