Analog Devices LT8338

Description

The LT®8338 is a synchronous monolithic step-up regulator that provides high efficiency for input and output up to 40V. It consumes only 6μA quiescent current atBurst Mode operation to maintain high efficiency at very low output current, while keeping the output ripple below 20mVP-P. The LT8338 switching frequency can be set with an external resistor over the range of 300kHz to 3MHz. A SYNC/MODE pin allows synchronization to an external clock. It can also be used to select between Burst Mode operation and pulse-skipping mode, or to enable spread spectrum modulation to reduce EMI. The EN/UVLO pin has an accurate 1V threshold and can be used to program VIN UVLO or to shut down the part. The LT8338 enters 100% duty cycle PassThru mode when VIN is higher than the regulated VOUT. The LT8338 also features frequency foldback and internal soft-start for inductor current control during start-up.

Features

• Wide Input Voltage Range: 3.0V to 40V
• Low Quiescent Current in Burst Mode® Operation
• <6μA IQ
• <20mVP-P Output Ripple
• Synchronous Operation for High Efficiency
• Monolithic 40V, 240mΩ Power Switches
• 100% Duty Cycle PassThru™ Mode for Boost Preregulation Applications
• Adjustable and Synchronizable: 300kHz to 3MHz
• Spread Spectrum for Reduced EMI/EMC Emissions
• Accurate EN/UVLO
• Internal Compensation
• 20MΩ Internal Feedback Divider
• Output Voltage Up to 40V
• Available in 10-Lead MSOP Package
• AEC-Q100 Automotive Qualification in Progress

Typical applications

• Automotive Power Supplies
• Battery-Powered Systems
• Industrial, General Purpose Step-Up

More information

• Datasheet
• IC product information