DESCRIPTION
●The UCD9248 is a multi-rail, multi-phase synchronous buck digital PWM controller designed for
●non-isolated DC/DC power applications. This device integrates dedicated circuitry for DC/DC loop
●management with flash memory and a serial interface to support configurability, monitoring and
●management.
●FEATURES
●• Fully Configurable Multi-Output and Multi Phase Non-Isolated DC/DC PWM Controller
●• Controls Up to 4 Voltage Rails and Up to 8 Phases
●• Supports Switching Frequencies Up to 2MHz with 250 ps Duty-Cycle Resolution
●• Up To 1mV 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™ Designer, a Full Featured PC Based Design Tool to Simulate, Configure, and Monitor Power Supply Performance
●APPLICATIONS
●• Industrial/ATE
●• Networking Equipment
●• Telecommunications Equipment
●• Servers
●• Storage Systems
●• FPGA, DSP and Memory Power
