The LP3907 device is
a multi-function, programmable power management unit (PMU) optimized for low-power FPGAs,
microprocessors, and DSPs. This device integrates two highly efficient 1-A, 600-mA step-down DC-DC
converters with dynamic voltage scaling (DVS), two 300-mA linear regulators, and a 400-kHz
I2C interface to allow a host controller access to the internal control
registers of the device. The LP3907 additionally features programmable power-on sequencing.
Features include programmable power-on sequencing, communication control (I2C), dynamic
voltage scaling, overcurrent protection, Power Good, synchronous rectification, thermal shutdown,
and undervoltage lockout. For applications requiring light loads, the high-efficiency synchronous
switching buck regulators enter PFM mode and operate with reduced switching frequency and supply
current to maintain high efficiency at very light loads.
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