1FEATURES
2• Fully Configurable Multi-Output and Multi-
Phase Non-Isolated DC/DC PWM Controller
• Controls Up to 4 Voltage Rails and Up to 6
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
– Fast Overcurrent Protection
– 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

DESCRIPTION
The UCD9246 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.
The UCD9246 was designed to provide a wide
variety of desirable features for non-isolated DC/DC
converter applications while minimizing the total
system component count by reducing external
circuits. The solution integrates multi-loop
management with sequencing, margining, tracking
and intelligent phase management to optimize for
total system efficiency. Additionally, loop
compensation and calibration are supported without the need to add external components.
To facilitate configuring the device, the Texas
Instruments Fusion Digital Power™ Designer is
provided. This PC based Graphical User Interface
offers an intuitive interface to the device. This tool
allows the design engineer to configure the system
operating parameters for the application, store the
configuration to on-chip non-volatile memory and
observe both frequency domain and time domain
simulations for each of the power stage outputs.
TI has also developed multiple complementary power
stage solutions – from discrete drivers in the UCD7k
family to fully tested power train modules in the PTD
family. These solutions have been developed to
complement the UCD9k family of system power
controllers.