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Analog Devices Inc. LT8338 Micropower Synchronous Boost Converters provide high efficiency for input and output up to 40V. The LT8338 synchronous monolithic step-up regulator consumes only 6μA quiescent current at Burst Mode operation. This operation maintains high efficiency at a very low output current while keeping the output ripple below 20mVP-P.
The ADI 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. The pin is also used to select between Burst Mode operation and pulse-skipping mode or 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.
