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TPS54429ERSAR

更新时间： 2024-11-08 08:38:59
品牌 Logo 应用领域
德州仪器 - TI 转换器
页数 文件大小 规格书
26页 886K
描述
7V to 8V Input, 4.5-A Synchronous Step-Down SWIFT Converter

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TPS54429ERSAR 数据手册

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TPS54429E  
www.ti.com  
SLVSAS0 –FEBRUARY 2011  
7V to 8V Input, 4.5-A Synchronous Step-Down SWIFT™ Converter with Eco-Mode™  
Check for Samples: TPS54429E  
1
FEATURES  
DESCRIPTION  
23  
•
D-CAP2™ Mode Enables Fast Transient  
The TPS54429E is an adaptive on-time D-CAP2™  
mode synchronous buck converter. The TPS54429E  
enables system designers to complete the suite of  
various end equipment’s power bus regulators with a  
cost effective, low component count, low standby  
current solution. The main control loop for the  
TPS54429E uses the D-CAP2™ mode control which  
provides a very fast transient response with no  
external compensation components. The adaptive  
on-time control supports seamless transition between  
PWM mode at higher load conditions and  
Eco-mode™ operation at light loads. Eco-mode™  
allows the TPS54429E to maintain high efficiency  
during lighter load conditions. The TPS54429E also  
has a proprietary circuit that enables the device to  
adopt to both low equivalent series resistance (ESR)  
output capacitors, such as POSCAP, SP-CAP, and  
ultra-low ESR ceramic capacitors. The device  
operates from 7-V to 18-V VIN input. The output  
voltage can be programmed between 0.76V and  
5.5V. The device also features an adjustable soft  
Response  
•
Low Output Ripple and Allows Ceramic Output  
Capacitor  
•
•
•
Wide VIN Input Voltage Range: 7 V to 18 V  
Output Voltage Range: 0.76 V to 5.5 V  
Highly Efficient Integrated FET’s Optimized  
for Lower Duty Cycle Applications  
– 63 mΩ (High Side) and 55 mΩ (Low Side)  
•
•
•
•
•
•
•
•
High Efficiency, less than 10 μA at shutdown  
High Initial Bandgap Reference Accuracy  
Adjustable Soft Start  
Pre-Biased Soft Start  
700-kHz Switching Frequency (fSW  
)
Cycle By Cycle Over Current Limit  
Power Good Output  
Auto-Skip Eco-mode™ for High Efficiency at  
Light Load  
start time and  
a
power good function. The  
TPS54429E is available in the 14-pin HTSSOP  
package and the 16 pin QFN package, designed to  
operate from –20°C to 85°C.  
APPLICATIONS  
•
Wide Range of Applications for Low Voltage  
System  
–
–
–
–
Digital TV Power Supply  
High Definition Blu-ray Disc™ Players  
Networking Home Terminal  
Digital Set Top Box (STB)  
U1  
Vout (50 mV/div)  
TPS54429E  
Iout (2 A/div)  
100 ms/div  
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
3
D-CAP2, Eco-mode, PowerPAD are trademarks of Texas Instruments.  
Blu-ray Disc is a trademark of Blu-ray Disc Association.  
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.  
© 2011, Texas Instruments Incorporated  
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TPS54429ERSAR 替代型号

型号 品牌 替代类型 描述 数据表
TPS54429ERSAT TI

完全替代

 7V to 8V Input, 4.5-A Synchronous Step-Down SWIFT Converter

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