1. The LP3906, manufactured by National Semiconductor, is a versatile, programmable power management chip.
2.MPCI873Q is a power management chip produced by Freescale Semiconductor. The MPCI8730 power management chip can be powered by lithium-ion or dry batteries, and can provide a separate output voltage for the microcontroller, including 22 c\/Dc converter and low voltage differential voltage regulator, each output voltage can be set independently through the I-8 i serial interface.
3.TPS6502Q is an integrated power management chip produced by Texas Instruments. It has a 3-way high-efficiency step-down converter that provides the core voltage for peripherals, I \/ 0 ports, and systems with memory integrated in a processor. Lustep-type converters enter low power mode at light load for maximum efficiency with maximum load current.