LTC3531-3 Datasheet | Linear Technology

LTC3531/ LTC3531-3.3/LTC3531-3 200m A Buck-Boost Synchronous DC/DC Converters + Features - Regulated Output with Input Above, Below or Equal to the Output - Single Inductor - Up to 90% Efficiency - VIN Range: 1.8V to 5.5V - 200m A at 3.3VOUT from 3.6V Input - 125m A at 3VOUT from 2.5V Input - Fixed VOUT Versions (TSOT, DFN): 3.3V, 3V - Adjustable VOUT Version (DFN): 2V to 5V - Burst Mode® Operation, No External pensation - Ultra Low Quiescent Current: 16μA, Shutdown Current <1μA - Only 3 External ponents Required (Fixed Voltage Versions) - Short-Circuit Protection - Output Disconnect in Shutdown - Available in 6-Pin Thin SOT and 3mm × 3mm DFN Packages U APPLICATIO S - Handheld Instruments - MP3 Players - Handheld puters - PDA/GPS DESCRIPTIO The LTC®3531/LTC3531-3.3/LTC3531-3 are synchronous buck-boost DC/DC converters that operate from input voltages above, below or equal to the output voltage. The topology incorporated in the ICs provides a continuous transfer through all operating modes, making the product ideal for single cell Li-Ion and multicell alkaline or nickel applications. The converters operate in Burst Mode, minimizing solution footprint and ponent count as well as providing high conversion efficiency over a wide range of load currents. The devices include two 0.5Ω N-channel MOSFET switches and two P-channel switches (0.5Ω, 0.8Ω). Quiescent current is typically 16μA, making the parts ideal for battery power applications. Other Features include a <1μA shutdown current, current limiting, thermal shutdown and output disconnect. The parts are offered in a 6-pin Thin SOTTM package for fixed voltage versions or a 3mm × 3mm DFN package for fixed and adjustable...