National Semiconductor LP3907

Description

Dual High-Current Step-Down DC/DC and Dual Linear Regulator with I2C Compatible Interface from the PowerWise Family The LP3907 is a multi-function, programmable Power Management Unit, optimized for low power FPGAs, microprocessors and DSPs. This device integrates two highly efficient 1A/600mA step-down DC/DC converters with dynamic voltage management (DVM), two 300mA linear regulators and a 400kHz I 2C compatible interface to allow a host controller access to the internal control registers of the LP3907. The LP3907 additionally features programmable power-on sequencing. Package options include a tiny 4 x 4 x 0.8mm LLP 24–pin package and an even smaller 2.5 x 2.5mm micro SMD 25-bump package.

Features

• 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
• 24-lead 4 × 4 × 0.8mm LLP or 25-bump 2.5 x 2.5mm micro SMD package
• Software Programmable Regulators
• External Power-on-reset function for Buck1 and Buck2 (i.e., Power Good with delay function)
• Undervoltage lock out detector to monitor input supply voltage
• LP3907Q is an Automotive Grade product that is AECQ-100 Grade 1 qualified
• 1A/600mA output current
• Programmable VOUT from:
  • Buck1 : 0.8V–2.0V @ 1A
  • Buck2 : 1.0V–3.5V @ 600mA
• Up to 96% efficiency
• 2.1MHz PWM switching frequency
• PWM - PFM automatic mode change under low loads
• ±3% output voltage accuracy
• Automatic soft start
• Linear Regulators (LDO)
• Programmable VOUT of 1.0V–3.5V (except “JJ11” and “FX6W” options)
• 300mA output current
• 30mV (typ) dropout

Datasheet: File:Lp3907.pdf