Dual High-Current Step-Down DC/DC and Dual Linear Regulator with I2C Compatible Interface

Features

• Compatible with advanced applications processors and FPGAs
  
• 2 LDO's 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 5 × 4 × 0.8 mm LLP package
  
• Software Programmable Regulators

Key Specifications

Step-Down DC/DC Converter (Buck)

• 1.5A output current
  
• Programmable Vout from:
  
• Buck1 : 0.8V–2.0V
  
• Buck2 : 1.0V–3.5V
  
• Up to 96% efficiency
  
• 2 MHz PWM switching frequency
  
• ±3% output voltage accuracy
  
• Automatic soft start

Linear Regulators (LDO)

• Programmable VOUT of 1.0V–3.5V
  
• ±3% output voltage accuracy
  
• 300 mA output currents
  
• 25 mV (typ) Dropout

Description

The LP3906 is a multi-function, programmable Power Management Unit, optimized for low power FPGAs, Microprocessors and DSPs. This device integrates two highly efficient 1.5A Step-Down DC/DC converters with dynamic voltage management (DVM), two 300mA Linear Regulators and a 400kHz I2C compatible interface to allow a host controller access to the internal control registers of the LP3906. The LP3906 additionally features programmable power-on sequencing and is offered in a tiny 5 x 4 x 0.8mm LLP-24 pin package.

Applications

• FPGA, DSP core power
  
• Applications processors
  
• Peripheral I/O power