UCD9111 Datasheet, PDF (1/29 Pages) Texas Instruments – SINGLE PHASE SYNCHRONOUS BUCK CONTROLLER

UCD9111
SINGLE PHASE SYNCHRONOUS BUCK CONTROLLER
VER. 0.5 SEPTEMBER 2006
• FEATURES
• Digital synchronous buck PWM
controller with 175ps PWM resolution
• Digital control with programmable PID
compensation
• Vin from 4.5V to 15.5V (UCD7230)
• Vout from 1% to 99% of Vin
• Programmable switching frequency,
capable of up to 2MHz/Phase
• Programmable soft start and soft stop
• Supports pre-biased outputs
• 0.5% internally trimmed 800mV
Reference
• Remote sensing differential amplifier
• Power supply monitoring via PMBus
• Single bias supply (3.3V VDD)
• Graphical user interface configuration
• Internal thermal sensor
• PMBus Support
■ Query Voltage, Current, Faults, etc
■ Voltage Setting and Calibration
■ Protection Threshold Adjustment
• 32-Pin QFN Package
• APPLICATIONS
• Networking Equipment
• Servers
• Storage Systems
• Telecommunications Equipment
• DC Power Distributed Systems
• Industrial / ATE
• DESCRIPTION
The UCD9111 is single phase synchronous buck
digital PWM controller that supports point of load
(POL) applications. The device is configured thru
the use of a graphical user interface (GUI). The loop
compensator is configurable with the GUI to meet
dynamic converter performance allowing a single
hardware design to cover a broad range of POL
applications.
In addition to digital control loop, the UCD9111 is
able to monitor power supply operating conditions
and report the status to the host system through
PMBus. The monitoring parameters are configurable
through GUI. The GUI also allows the power supply
designer to easily to configure the digital control loop
characteristics and generate the loop gain bode plot.
The UCD7230 synchronous buck driver has been
designed to work with the UCD911x 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.
ORDERING INFORMATION
PACKAGE
QFN
PRODUCT PREVIEW information concerns products in the
formative or design phase of development. Characteristic data
and other specifications are design goals. Texas Instruments
reserves the right to change or discontinue these products
without notice.
TAPE AND REEL QTY
250
www.ti.com
PART NUMBER
UCD9111RHB
Copyright © 2001, Texas Instruments Incorporated
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