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