UCD9112_16 Datasheet, PDF (1/27 Pages) Texas Instruments – Digital Dual-Phase Synchronous Buck Controller

Not Recommended for New Designs
UCD9112
www.ti.com
SLVS711A – SEPTEMBER 2006 – REVISED JUNE 2007
Digital Dual-Phase Synchronous Buck Controller
Check for Samples: UCD9112
FEATURES
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•2 Digital Dual-Phase Synchronous Buck PWM
Controller With 175ps PWM Resolution
• Digital Control With Programmable
Compensation
• Dual-Phase With Current Balancing Capability
• VOUT from 0.4V to 4.0V
• Programmable Switching Frequency,
Capable of up to 1MHz
• Programmable Soft Start and Soft Stop
• Supports Pre-Biased Start-Up
• Supports Voltage Tracking
• Supports Remote Differential Voltage Sensing
• Supports Fan Speed Adjustment and Monitor
• Single 3.3V Bias Supply
• Internal and External Thermal Sensor
• Fault Logging
• Graphical User Interface Configuration
• PMBus Support
– Query Voltage, Current, Faults, etc.
– Voltage Setting and Calibration
– Protection Threshold Adjustment
• 32-Pin QFN Package
APPLICATIONS
• DC Power Distributed Systems
• Industrial / ATE
• Networking Equipment
• Servers
• Storage Systems
• Telecommunications Equipment
QFN PACKAGE
(TOP VIEW)
ADDR1 1
ADDR0 2
IOUT_1 3
VIN 4
VOUT 5
IOUT_2 6
TEMP 7
TRACK 8
UCD9112
24 CLF2
23 CLF1
22 ALERT
21 PGOOD
20 DPWMA1
19 SRE1
18 DPWMA2
17 SRE2
DESCRIPTION/ORDERING INFORMATION
The UCD9112 is a dual-phase synchronous buck digital PWM controller designed for point of load power
applications. This device integrates dedicated circuitry for DC/DC loop management with a microcontroller core,
flash memory and a PMBus™ interface to support configurability, monitoring and management of a point of load.
The UCD9112 is capable of operating at switching frequencies of up to 1MHz.
The UCD9112 evaluation module comes with the Fusion Digital Power Designer graphical user interface (GUI).
This GUI allows the designer to configure the operating parameters and loop response of the power supply
controller. This configuration can then be stored to the devices on chip non-volatile memory. This will enable a
synchronous buck hardware design to be dynamically calibrated and reconfigured to optimize a single hardware
design for a variety of applications.
The UCD7230 synchronous buck driver has been designed to work with the UCD9112 controller to provide a
highly integrated digital power solution. In addition to 4A output drive capability, the driver integrates current limit,
short circuit protection as well as under-voltage lockout protection. The UCD7230 also has a 3.3V, 10mA linear
regulator that provides the supply current for the controller.
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2006–2007, Texas Instruments Incorporated