Datasheet > LP5552_08

LP5552_08

更新时间： 2024-02-11 02:22:29

品牌	Logo	应用领域
美国国家半导体 - NSC		/
页数	文件大小	规格书
36页	1692K
描述
PWI 2.0 and PowerWise Technology Compliant Energy Management Unit

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LP5552_08 数据手册

May 20, 2008

LP5552

PWI 2.0 and PowerWise^®Technology Compliant Energy

Management Unit

General Description

The LP5552 is a PWI™ 2.0 compliant Energy Management

Unit (EMU) for reducing power consumption in low-power,

portable applications.

Features

High-efficiency PowerWise Technology Adaptive Voltage

■

Scaling for intelligent energy management in AVS and

DVS environments

PWI 2.0 open standard interface for system-level power

management

Two digitally programmable 3.6MHz buck regulators to

power dual-voltage domains

The LP5552 contains 2 advanced, digitally controlled switch-

ing regulators for supplying variable voltages to a SoC or

processor. The device also incorporates 5 programmable

low-dropout, low-noise linear regulators for powering I/O, pe-

ripheral logic blocks, auxiliary system functions, and main-

taining memory retention (dual-domains) in shutdown-mode.

■

Five programmable LDOs for system functions such as:

■

PLL/Clock Generation

I/O

—

The device is controlled via the high-speed serial PWI 2.0

open-standard interface. The LP5552 operates cooperatively

with PowerWise^®technology-compatible processors to opti-

mize supply voltages adaptively (AVS - Adaptive Voltage

Scaling) over process and temperature variations. It also sup-

ports dynamic voltage scaling (DVS) using frequency/voltage

pairs from pre-characterized lookup tables.

Memory Retention

Internal soft start

■

Variable regulator power up sequencing

Applications

GSM/GPRS/EDGE & UMTS cellular handsets

■

Key Specifications

Hand-held radios

•

2.7V to 4.8V Input Voltage Range

±2% (typical) Output Voltage Accuracy

PDAs

Battery-powered devices

Programmable DC/DC Buck Converters

Portable instruments

■

•

800mA Output Current per Switcher

Up to 88% Switcher Efficiency

Digitally programmable from 0.6V — 1.235V

Programmable LDOs

Five digitally programmable LDOs

•

202103

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