The LP5550 is a PWI 1.0 compliant Energy Management System for reducing power consumption of stand-alone mobile phone processors such as base-band or applications processors. The LP5550 contains an advanced, digitally controlled switching regulator for supplying variable voltage to processor core and memory. The device also incorporates 3 programmable LDO-regulators for powering I/O, PLLs and maintaining memory retention in shutdown-mode. The device is controlled via the PWI open-standard interface. The LP5550 operates cooperatively with PowerWise technology compatible processors to optimize supply voltages adaptively over process and temperature variations or dynamically using frequency/voltage pre-characterized look-up tables.
The National Semiconductor LP5550 is a PowerWise Technology Compliant Energy Management Unit designed to reduce power consumption in stand-alone mobile phone processors, such as base-band or applications processors. It features an advanced digitally controlled switching regulator for supplying variable voltage to the processor core and memory, along with three programmable LDO regulators for I/O, PLLs, and memory retention during shutdown modes.
The device operates cooperatively with PowerWise technology compatible processors via a PWI open-standard interface to optimize supply voltages adaptively over process and temperature variations or dynamically using frequency/voltage pre-characterized look-up tables. Key features include high-efficiency adaptive voltage scaling, auto or PWI controlled PFM mode transition, and internal soft start/sequencing.
| Switching Frequency (PWM) | 1 MHz |
|---|---|
| Operating Temperature Range | -40°C to +85°C |
The LP5550 is a PWI 1.0 compliant Energy Management System.
It is used in GSM/GPRS/EDGE & UMTS cellular handsets, hand-held radios, PDAs, and battery-powered devices.
The device incorporates 3 programmable LDO-regulators for powering I/O, PLLs, and maintaining memory retention.