Datasheet

www.ti.com

Description

2.2 Features

UCD9224

• Fully Configurable Multi-Output and Multi-Phase Non-Isolated DC/DC PWM Controller

• Controls Up to 2 Voltage Rails and Up to 4 Phases

• Supports Switching Frequencies Up to 2 MHz with 250-ps Duty-Cycle Resolution

• Up To 1-mV Closed Loop Resolution

• Hardware-Accelerated, 3-Pole/3-Zero Compensator with Non-Linear Gain for Improved Transient

Performance

• Supports Multiple Soft-Start and Soft-Stop Configurations Including Prebias Start up

• Supports Voltage Tracking, Margining and Sequencing

• Supports Current and Temperature Balancing for Multi-Phase Power Stages

• Supports Phase Adding/Shedding for Multi-Phase Power Stages

• Sync In/Out Pins Align DPWM Clocks Between Multiple UCD92xx Devices

• 12-Bit Digital Monitoring of Power Supply Parameters Including:

– Input/Output Current and Voltage

– Temperature at Each Power Stage

• Multiple Levels of Over-current Fault Protection:

– External Current Fault Inputs

– Analog Comparators Monitor Current Sense Voltage

– Current Continually Digitally Monitored

• Over and Under-voltage Fault Protection

• Over-temperature Fault Protection

• Enhanced Nonvolatile Memory with Error Correction Code (ECC)

• Device Operates From a Single Supply with an Internal Regulator Controller That Allows Operation

Over a Wide Supply Voltage Range

• Supported by Fusion Digital Power™ (UCD9224 Datasheet) Designer, a Full Featured PC Based

Design Tool to Simulate, Configure, and Monitor Power Supply Performance

SLUU443–March 2011 UCD9224EVM-464 Digitally Controlled Dual-Rail POL

Submit Documentation Feedback