TI LP5551SQ/NOPB

The LP5551 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 LP5551 contains two advanced, digitally controlled switching regulators for supplying variable voltage to processor core and memory. Two regulators provide P- and N- well biasing for threshold scaling applications. The device also integrates 4 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 LP5551 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 and provides P- and N-well biasing for threshold scaling.

• 2 300 mA Buck Regulators Operate 180 Degrees out of Phase for Reduced EMI
• 1 MHz PWM Switching Frequency
• 4 Programmable LDOs Ideal for I/O (Two of These), PLL, and Memory Retention Supply Generation
• Supports High-Efficiency PowerWise Technology
• Adaptive Voltage Scaling
• PWI Open Standard Interface for System Power Management
• Digitally Controlled Intelligent Voltage Scaling
• Auto or PWI Controlled PFM Mode Transition
• Internal Soft Start/Startup Sequencing
• Adjustable P- and N- Well Bias Supply for Threshold Scaling
• Power OK Output

• Dual Core Processors
• GSM/GPRS/EDGE & UMTS Cellular Handsets
• Hand-Held Radios
• PDAs
• Battery Powered Devices
• Portable Instruments