LP3906

更新时间： 2024-09-28 04:19:55

品牌	Logo	应用领域
美国国家半导体 - NSC		稳压器
页数	文件大小	规格书
38页	1998K
描述
Dual High-Current Step-Down DC/DC and Dual Linear Regulator with I2C Compatible Interface

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LP3906 数据手册

www.DataSheet4U.com

September 2006

LP3906

Dual High-Current Step-Down DC/DC and Dual Linear

Regulator with I2C Compatible Interface

General Description

Features

n Compatible with advanced applications processors and

FPGAs

The LP3906 is a multi-function, programmable Power Man-

agement Unit, optimized for low power FPGAs, Microproces-

sors 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 se-

quencing and is offered in a tiny 5 x 4 x 0.8mm LLP-24 pin

package.

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)

Applications

n 1.5A output current

n FPGA, DSP core power

n Applications processors

n Peripheral I/O power

Programmable Vout from:

— Buck1 : 0.8V–2.0V

— Buck2 : 1.0V–3.5V

n Up to 96% efficiency

n 2 MHz PWM switching frequency

3% output voltage accuracy

n Automatic soft start

Linear Regulators (LDO)

n Programmable V_OUTof 1.0V–3.5V

3% output voltage accuracy

n 300 mA output currents

n 25 mV (typ) Dropout

DS201978

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