High-efficiency synchronous current mode step-up converter with output disconnect

The Monolithic Power Systems (MPS) MP3414A synchronous step-up converter, with output disconnect, is now available from Mouser stock. The high-efficiency current-mode MP3414A can start up from an input voltage as low as 1.8V while providing inrush current limiting and output short-circuit protection (SCP). The integrated P-channel synchronous rectifier improves efficiency and eliminates the need for an external Schottky diode. The PMOS disconnects the output from the input when the MP3414A shuts down. The output disconnect feature allows the output to be discharged completely, allowing the MP3414A to draw a supply current of under 1µA in shutdown mode. The 1MHz switching frequency allows small external components while the internal compensation and soft start minimize the external component count. These features produce a compact solution for a wide current load range. The MP3414A features an integrated power MOSFET that supports an output of up to 5.5V and a peak switching current above 3A. The MP3414A is available in a small 8-pin TSOT23 package. Typical applications include two-cell and three-cell alkaline, NiCd or NiMH, or single-cell Li battery-power products, personal medical devices, portable media players, wireless peripherals and gaming accessories.