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TPS54335_13

更新时间： 2024-11-18 12:16:15
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德州仪器 - TI 稳压器
页数 文件大小 规格书
40页 1884K
描述
4.5V to 28V Input, 3A Output, Synchronous SWIFT Step-Down Voltage Regulator

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TPS54335_13 数据手册

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TPS54335  
TPS54336  
www.ti.com  
SLVSC03B –MAY 2013–REVISED NOVEMBER 2013  
4.5V to 28V Input, 3A Output, Synchronous SWIFT™ Step-Down Voltage Regulator  
Check for Samples: TPS54335, TPS54336  
1
FEATURES  
DESCRIPTION  
The TPS54335/54336 is a 3A, low quiescent supply  
current (IQ), synchronous DC-DC converter IC  
(integrated circuit) with up to 28V input support.  
2
•
Two 128mΩ/84mΩ MOSFETs for 3A  
Continuous Output Current  
•
•
TPS54335: Internal 2ms Soft-start,  
50kHz–1.5MHz Adjustable Frequency  
By integrating MOSFETs and by employing current  
mode switching control, the TPS54335/54336 offers  
compact designs on PCB (printed circuit board)  
reducing external component count.  
TPS54336: Adjustable Soft-start, Fixed 340kHz  
Frequency  
•
•
Low 2µA Shutdown Quiescent Current  
Efficiency is maximized through the integrated  
128mΩ/84mΩ MOSFETs, low IQ and pulse skipping  
at light loads. Using the enable pin, shutdown supply  
current is reduced to 2 μA by entering a shutdown  
mode.  
0.8V Internal Voltage Reference with ±0.8%  
Accuracy at Room Temperature and ±1.5%  
Accuracy Over Temperature  
•
•
Fixed-Frequency Current Mode Control  
Pulse Skipping Boosts Efficiency at Light  
Loads  
This step-down (buck) converter provides accurate  
regulation for a variety of loads with a well-regulated  
voltage reference 1.5% over temperature.  
•
•
•
•
Overcurrent Protection for Both MOSFETs  
with Hiccup Mode for Severe Fault Conditions  
Cycle by cycle current limiting on the high-side  
MOSFET protects the TPS54335/54336 in overload  
situations and is enhanced by a low-side sourcing  
current limit which prevents current runaway. There is  
also a low-side sinking current limit which turns off  
the low-side MOSFET to prevent excessive reverse  
current. Hiccup protection will be triggered if the  
overcurrent condition has persisted for longer than  
the preset time. Thermal hiccup protection disables  
the part when die temperature exceeds thermal  
shutdown temperature and enables the part again  
after the built-in thermal hiccup time.  
Thermal Shutdown and Overvoltage Transition  
Protection  
Available in Easy-to-Use 8-Pin SOIC  
PowerPAD™ and 10-pin SON  
Monotonic Start-Up into Pre-biased Outputs  
APPLICATIONS  
•
Consumer Applications such as a Digital TV  
(DTV), Set Top Box (STB, DVD/Blu-ray Player),  
LCD Display, CPE (Cable Modem, WiFi  
Router), DLP Projectors, Smart Meters  
.
.
•
•
•
Battery Chargers  
Industrial and Car Audio Power Supplies  
5V,12V and 24V Distributed Power Bus Supply  
SIMPLIFIED SCHEMATICS  
VIN  
C1  
VIN  
VIN  
VIN  
C1  
TPS54335  
TPS54336  
CBOOT  
LO  
CBOOT  
LO  
BOOT  
PH  
BOOT  
PH  
EN  
EN  
VOUT  
VOUT  
RT  
SS  
CO  
CO  
COMP  
COMP  
RO1  
RO1  
CC  
CC  
VSENSE  
VSENSE  
C2  
C2  
RRT  
RC  
RC  
RO2  
RO2  
CSS  
GND  
GND  
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.  
2
PowerPAD, SWIFT are trademarks of Texas Instruments.  
UNLESS OTHERWISE NOTED this document contains  
PRODUCTION DATA information current as of publication date.  
Products conform to specifications per the terms of Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2013, Texas Instruments Incorporated  
 
 
 
 
 
 
 
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 		具有 Eco-Mode 的 4.5V 至 28V 输入、3A 同步降压转换器 | DDA
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 		具有 Eco-Mode 的 4.5V 至 28V 输入、3A 同步降压转换器 | DRC
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