器件名称: UCD7230RGW
功能描述: Digital Control Compatible Synchronous Buck
文件大小: 337.18KB 共19页
简 介:UCD7230
www.ti.com
SLUS741 – NOVEMBER 2006
Digital Control Compatible Synchronous Buck ±4-A Drivers with Current Sense Conditioning Amplifier
FEATURES
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 25-ns Propagation Delay and Adjustable Blanking Interval Prevents Catastrophic Current Levels Digital Output Current Limit Flag Low Offset, Gain of 25, Differential Current Sense Amplifier 3.3-V, 10-mA Internal Regulator Dual ±4-A TrueDrive High-Current Drivers 10-ns Typical Rise/Fall Times with 2.2-nF Loads 25-ns Input-to-Output Propagation Delay 25-ns Current Sense-to-Output Propagation Delay 4.5-V to 15.5-V Supply Voltage Range
VIN
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 Cs or the TMS320TM DSP Family
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.
VOUT
VDD
CS BIAS
CS+
BST
OUT1
SW
PVDD
OUT2
PGND
+
IO
UVLO
IDLY
+
0.6 V
POS
Enable BIAS
3V3
3V3 REG Blank
+
Drive……
