●The LP3907 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.
●For all available packages, see the orderable addendum at the end of the data sheet.
● Input Voltage Range: 2.8 V to 5.5 V
● Compatible with Advanced Applications Processors and FPGAs
● 2 LDOs for Powering Internal Processor Functions and I/Os
● High-Speed Serial Interface for Independent Control of Device Functions and Settings
● Precision Internal Reference
● Thermal Overload Protection
● Current Overload Protection
● Software Programmable Regulators
● External Power-On-Reset Function for Buck1 and Buck2 (Power Good with Delay Function)
● Undervoltage Lockout Detector to Monitor Input Supply Voltage
● Programmable VOUT from:
● Buck1 : 0.8 V–2 V at 1 A
● Buck2 : 1 V–3.5 V at 600 mA
● Up to 96% Efficiency
● 2.1-MHz PWM Switching Frequency
● PWM-to-PFM Automatic Mode Change
●Under Low Loads
● ±3% Output Voltage Accuracy
● Automatic Soft Start
● Programmable VOUT of 1 V to 3.5 V
●(except , , and options)
● ±3% Output Voltage Accuracy
● 300-mA Output Current
● 30-mV (typical) Dropout
