WD3133

WD3133 HIGH EFFICIENCY, 1.2-MHz DC-DC STEP-UP CONVERTERS Descriptions The WD3133 is a high efficiency, high power, peak current mode step-up converter. Internal 0.35Ω HV power MOSFET with Min. 1A current limit. For portable device with Li-ion battery application, WD3133 could output typical 12V / 200mA ~300mA from 3.3V~5V input. The boost converter WD3133 runs in Pulse-Width Modulation (PWM) mode, at 1.2MHz fixed switching frequency to reduce output ripple, improve conversion efficiency. It allows for the use of small external components. At light load currents the converter enters Skipping Mode to maintain a high efficiency over a wide load current range. The build-in soft start circuitry minimizes the inrush current at start-up. The WD3133 is available in SOT-23-5L package. Standard product is Pb-free and Halogen-free. Features  Wide input voltage range from 2.7-V to 5.5-V  1.25-V (±2%) high accuracy reference voltage  1.2-MHz switching frequency  Up to 93% efficiency ...