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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
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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
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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
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Supports Phase Adding/Shedding for Multi-Phase Power Stages
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Sync In/Out Pins Align DPWM Clocks Between Multiple UCD92xx Devices
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12-Bit Digital Monitoring of Power Supply Parameters Including:
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Input/Output Current and Voltage
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Temperature at Each Power Stage
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Multiple Levels of Over-current Fault Protection:
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External Current Fault Inputs
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Analog Comparators Monitor Current Sense Voltage
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Current Continually Digitally Monitored
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Over and Under-voltage Fault Protection
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Over-temperature Fault Protection
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Enhanced Nonvolatile Memory with Error Correction Code (ECC)
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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
3
SLUU443 – March 2011
UCD9224EVM-464 Digitally Controlled Dual-Rail POL
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