Analog Devices LT8350 | Demoboard EVAL-LT8350-AZ

Description

Evaluation circuit EVAL-LT8350-AZ is a 40V synchronous buck-boost converter featuring the LT8350. It drives up to 2.5A load at 12V output when VIN is between 9V and 40V and will run down to 3VIN with reduced output current. EVAL-LT8350-AZ runs at 350kHz switching frequency with spread spectrum frequency modulation (SSFM) disabled. When enabled, SSFM spreads the switching frequency of the LT8350 from fSW to fSW +25% for reduced EMI emission.The LT8350 has an operating input voltage range of 3V to 40V. It has internal, synchronous 42V MOSFETs at buck-side and 20V MOSFETs at boost-side for high efficiency and small size. It has an adjustable switching frequency between 200kHz and 2MHz. The LT8350 can be synchronized to an external source, programmed with SSFM enabled for low EMI, or set to normal operation.

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

Typical applications

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

More information

• Datasheet
• IC product information