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PDF LP5552 Data sheet ( Hoja de datos )
| Número de pieza | LP5552 | |
| Descripción | PWI 2.0 and PowerWise Technology Compliant Energy Management Unit | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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ADVANCE INFORMATION
September 2006
LP5552
PWI 2.0 and PowerWise™ Technology Compliant Energy
Management Unit
General Description
Features
The LP5552 is a PWI 2.0 compliant Energy Management n Two 800 mA buck regulators operate 180 degrees out of
System for reducing power consumption of stand-alone mo-
phase for reduced EMI
bile phone processors such as base-band or applications n 3.6 MHz PWM switching frequency
processors.
n Five programmable LDOs ideal for I/O , PLL, and
The LP5552 contains two advanced, digitally controlled
memory retention supply generation.
switching regulators for supplying variable voltage to proces- n Supports high-efficiency PowerWise Technology
sor core and memory. The device also incorporates 5 pro-
Adaptive Voltage Scaling
grammable LDO regulators for powering I/O, peripheral logic
blocks, maintaining memory retention (dual-domains) in
shutdown mode, and auxillary functions.
n PWI 2.0 open standard interface for system power
management
n Digitally controlled intelligent voltage scaling
The device is controlled via the PWI 2.0 open-standard
interface. The LP5552 operates cooperatively with Power-
Wise technology compatible processors to optimize supply
voltages adaptively over process and temperature variations
n Auto or PWI controlled PFM mode transition
n Internal soft start/startup sequencing.
n Power OK output.
(adaptive voltage scaling) or dynamically using frequency/
voltage pre-characterized look-up tables (dynamic voltage
scaling).
Applications
n Dual core processors
n GSM/GPRS/EDGE & UMTS cellular handsets
n Hand-held radios
n PDAs
DataSheent4BUa.tcteormy powered devices
n Portable instruments
System Diagram
DataShee
FIGURE 1. System Diagram
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© 2006 National Semiconductor Corporation
DS202103
20210301
www.national.com
1 page | ||
| Páginas | Total 3 Páginas | |
| PDF Descargar | [ Datasheet LP5552.PDF ] | |
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