Step-Down DC/DC and Dual Linear Regulator 24-Pin LLP EP T/R

The LP3907 is a multi-function, programmable Power Management Unit, 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 management (DVM), 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.

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

Step-Down DC-DC Converter (Buck)

• Programmable V_OUT 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

Linear Regulators (LDO)

• Programmable V_OUT of 1 V to 3.5 V
  (except “JJ11”, “FX6W”, and “JX6X” options)
• ±3% Output Voltage Accuracy
• 300-mA Output Current
• 30-mV (typical) Dropout