Microchip has released the MCP1603 - a 2 MHz, 500 mA switching regulator. This new, low-power switcher provides adjustable and fixed output voltages, operating efficiency of up to 90%, and is available in Thin SOT-23 (TSOT-23) and 2 mm x 3 mm DFN packages. It is ideal for extending battery life and reducing heat dissipation in a variety of portable, handheld electronic devices. The switcher also features a low quiescent current of 45 μA, a standby current of only 100 nA, under voltage lockout (UVLO), over-temperature and over-current protection and auto transition from PWM to PFM modes for lower energy use and heat dissipation, as well as longer battery life. With an input voltage range of 2,7 V to 5,5 V and either an adjustable output voltage range of 0,8 V to 4,5 V, or a fixed output voltage range between 1,2 V and 3,3 V, the MCP1603 switcher can cover the entire Li-Ion, Li-Polymer, NiCd and NiMH voltage range.
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