1FEATURES

2• Fully Configurable Four-Output Non-Isolated

DC/DC PWM Controller with support for

TMS320C6670™ and TMS320C6678™ DSP VID

interface

• 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 Margining and Sequencing

• Sync In Pin Aligns DPWM Clocks Between

Multiple UCD92xx Devices

• 12-Bit Digital Monitoring of Power Supply

Parameters Including:

– Input Current and Voltage

– Output Current and Voltage

– Temperature at Each Power Stage

– Auxiliary ADC Inputs

• 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

• Networking Equipment

• Telecommunications Equipment

• FPGA, DSP, and Memory Power

DESCRIPTION

The UCD9244 is a four-rail synchronous buck digital

PWM controller designed for non-isolated DC/DC

power applications. This device integrates dedicated

circuitry for DC/DC loop management with support for

up to four VID interfaces. Additionally, the UCD9244

has flash memory and a serial interface to support

configurability, monitoring and management.

Several Voltage Identification (VID) modes are

supported, including a 4-bit parallel interface, a 6-bit

interface and an 8-bit serial interface.

The UCD9244 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 and

tracking 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 UCD92xx family of system power

controllers.