LP5553

更新时间： 2024-11-21 05:42:35

品牌	Logo	应用领域
美国国家半导体 - NSC		半导体
页数	文件大小	规格书
44页	3768K
描述
PowerWise® AVS Energy Management Unit with SPMI

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LP5553 数据手册

March 5, 2009

LP5553

PowerWise^®AVS Energy Management Unit with SPMI

General Description

Features

The LP5553 is a System Power Management Interface

(SPMI) compliant Energy Management Unit for reducing pow-

er consumption of low power hand held applications such as

dual-core processors and DSPs.

SPMI bus for system-level power management

■

High-efficiency PowerWise^®Technology Adaptive

Voltage Scaling for intelligent energy management in AVS

and DVS environments

The LP5553 contains 2 advanced, digitally controlled step-

down DC/DC converters for supplying variable voltages to a

SoC. The device also incorporates 5 programmable low-

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

eral logic blocks, auxiliary system functions, and maintaining

memory retention (dual-domain) in shutdown-mode.

Two digitally programmable 3.6 MHz buck regulators to

power dual voltage domains

Five Programmable LDOs for system functions such as:

■

PLL/Clock Generation

I/O

—

Memory Retention

The LP5553 implements 2 Non-Request Capable Slaves that

are controlled via the SPMI. The LP5553 operates coopera-

tively with PowerWise^®AVS technology compatible proces-

sors to optimize supply voltages adaptively (AVS - Adaptive

Voltage Scaling) over process and temperature variations. It

also supports dynamic voltage scaling (DVS) using frequen-

cy/voltage pairs from pre-characterized look-up tables.

Internal soft start

■

Variable regulator power up sequencing.

Applications

GSM/GPRS/EDGE & UMTS cellular handsets

■

Hand-held radios

PDAs

Key Specifications

Battery powered devices

2.7 to 4.8V Input Voltage Range

■

Portable instruments

■

±2% (typical) Output Voltage Range

Programmable DC/DC Buck Converters

800 mA Output Current per DC/DC Converter

■

Up to 88% Efficiency

Digitally Programmable from 0.6 to 1.235V

Programmable LDOs

Five digitally programmable LDOs

■

System Diagram

30040601

300406

www.national.com

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与LP5553相关器件

型号	品牌	获取价格	描述	数据表
LP5553TL	TI	获取价格	IC,MULTIPLE REGULATOR CIRCUIT,BGA,36PIN,PLASTIC
LP5553TL/NOPB	NSC	获取价格	PowerWise® AVS Energy Management Unit with SP
LP5553TLX	TI	获取价格	IC,MULTIPLE REGULATOR CIRCUIT,BGA,36PIN,PLASTIC
LP5553TLX/NOPB	NSC	获取价格	PowerWise® AVS Energy Management Unit with SP
LP5560	TI	获取价格	具有简单的单线控制和小的解决方案尺寸的可编程单 LED 驱动器
LP5560TME/NOPB	TI	获取价格	具有简单的单线控制和小的解决方案尺寸的可编程单 LED 驱动器 \| YFQ \| 4 \| -
LP5560TMX/NOPB	TI	获取价格	具有简单的单线控制和小的解决方案尺寸的可编程单 LED 驱动器 \| YFQ \| 4 \| -
LP5562	TI	获取价格	具有内部程序存储器和独立通道控制的 4 通道 RGB/白光 LED 驱动器
LP5562TME/NOPB	TI	获取价格	具有内部程序存储器和独立通道控制的 4 通道 RGB/白光 LED 驱动器 \| YQE \|
LP5562TMX/NOPB	TI	获取价格	具有内部程序存储器和独立通道控制的 4 通道 RGB/白光 LED 驱动器 \| YQE \|

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