National Semiconductor LP3906
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.| Part No. | LP3906 |
|---|---|
| Datasheet | LP3906 Download |
| Manufacturer |  National Semiconductor |
| Description | Dual High Current Step Down DC/DC and Dual Linear Regulator |
| Buy | Stock & Price |
GENERAL DESCRIPTION
FEATURES
n Compatible with advanced applications processors and FPGAs n 2 LDOs for powering Internal processor functions and I/Os n High speed serial interface for independent control of device functions and settings n Precision internal reference n Thermal overload protection n Current overload protection n 24-lead 5 x 4 x 0.8 mm LLP package n Software Programmable Regulators Key Specifications Step-Down DC/DC Converter (Buck) n 1.5A output current n Programmable Vout from: — Buck1 : 0.8V–2.0V — Buck2 : 1.0V–3.5V n Up to 96% efficiency n 2 MHz PWM switching frequency n ± 3% output voltage accuracy n Automatic soft start Linear Regulators (LDO) n Programmable VOUT of 1.0V–3.5V n ± 3% output voltage accuracy n 300 mA output currents n 25 mV (typ) DropoutAPPLICATIONS
n FPGA, DSP core power nAPPLICATIONS
processors n Peripheral I/O power © 2006 National Semiconductor Corporation DS201978 LP3906 Typical Application Circuit 20197801 FIGURE 1. Typical Application Circui...
