UCD7230_16 Datasheet, PDF (1/26 Pages) Texas Instruments – Digital Control Compatible Synchronous Buck Gate Drivers with Current Sense Conditioning Amplifier

Obsolete Device
UCD7230
www.ti.com
SLUS741D – NOVEMBER 2006 – REVISED JANUARY 2010
Digital Control Compatible Synchronous Buck Gate Drivers with Current Sense
Conditioning Amplifier
Check for Samples: UCD7230
FEATURES
1
•2 Input from Digital Controller Sets Operating
Frequency and Duty Cycle
• Up to 2-MHz Switching Frequency
• Dual Current Limit Protection with
Independently Adjustable Thresholds
• Fast Current Sense Circuit with Adjustable
Blanking Interval Prevents Catastrophic
Current Levels
• Digital Output Current Limit Flag
• Low Offset, Gain of 48, Differential Current
Sense Amplifier
• 3.3-V, 10-mA Internal Regulator
• Dual TrueDrive™ High-Current Drivers
• 10-ns Typical Rise/Fall Times with 2.2-nF
Loads
• 4.5-V to 15.5-V Supply Voltage Range
APPLICATIONS
• Digitally-Controlled Synchronous-Buck Power
Stages for Single and Multi-Phase
Applications
• Especially Suited for Use with UCD91xx or
UCD95xx Contollers
• High-Current Multi-Phase VRM/EVRD
Regulators for Desktop, Server, Telecom and
Notebook Processors
• Digitally-Controlled Synchronous-Buck Power
Supplies Using mCs or the TMS320TM DSP
Family
DESCRIPTION
The UCD7230 is part of the UCD7K family of digital
control compatible drivers for applications utilizing
digital control techniques or applications requiring fast
local peak current limit protection.
V_IN
V_OUT
BIAS
I _MAX
CLF
VDD
CS
BIAS
CS+
BST
OUT1
SW
PVDD OUT2 PGND
+
IO
UVLO
I_DLY
3V3
AGND
3V3
REG
Enable
Blank
Drive and Dead-Time
ControlLogic
(D;1-D)
Over
Curre nt
ILIM
Curre nt
Limit Logic
CLF
UCD7230
48x
+ ^{0.6 V}
POS
NEG
ILIM /10
+
AO
IN
SRE
I_DLY
DLY
I_LOAD
PWM
SRE
1
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.
TrueDrive, PowerPAD are trademarks of Texas Instruments.
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 © 2006–2010, Texas Instruments Incorporated