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TPS54525

更新时间： 2024-11-07 12:16:15
品牌 Logo 应用领域
德州仪器 - TI 转换器
页数 文件大小 规格书
24页 803K
描述
4.5V to 18V Input, 5.5-A Synchronous Step-Down Converter

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TPS54525 数据手册

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TPS54525  
www.ti.com  
SLVSB82 –MAY 2012  
4.5V to 18V Input, 5.5-A Synchronous Step-Down Converter  
Check for Samples: TPS54525  
1
FEATURES  
DESCRIPTION  
The TPS54525 is an adaptive on-time D-CAP2™  
mode synchronous buck converter. The TPS54525  
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  
TPS54525 uses the D-CAP2™ mode control which  
provides a very fast transient response with no  
external compensation components. The TPS54525  
also has a proprietary circuit that enables the device  
to adopt to both low equivalent series resistance  
(ESR) output capacitors, such as POSCAP or SP-  
CAP, and ultra-low ESR ceramic capacitors. The  
device operates from 4.5-V to 18-V VIN input. The  
output voltage can be programmed between 0.76 V  
and 5.5 V. The device also features an adjustable  
soft start time and a power good function. The  
TPS54525 is available in the 14-pin HTSSOP  
package, and designed to operate from –40°C to  
85°C.  
23  
•
D-CAP2™ Mode Enables Fast Transient  
Response  
•
Low Output Ripple and Allows Ceramic Output  
Capacitor  
•
•
•
Wide VIN Input Voltage Range: 4.5 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 33 mΩ (Low Side)  
•
•
•
•
•
•
•
High Efficiency, less than 10 μA at shutdown  
High Initial Bandgap Reference Accuracy  
Adjustable Soft Start  
Pre-Biased Soft Start  
650-kHz Switching Frequency (fSW  
)
Cycle By Cycle Over Current Limit  
Power Good Output  
APPLICATIONS  
•
Wide Range of Applications for Low Voltage  
System  
V
(50 mV/div ac coupled)  
O
–
–
–
–
Digital TV Power Supply  
High Definition Blu-ray Disc™ Players  
Networking Home Terminal  
Digital Set Top Box (STB)  
I
(2A/div)  
OUT  
U1  
Slew Rate (0.35A/µsec)  
TPS54525  
Time Scale (100µsec/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, 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.  
Copyright © 2012, Texas Instruments Incorporated  
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TPS54525 替代型号

型号 品牌 替代类型 描述 数据表
TPS54425 TI

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