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TPS54526

更新时间: 2024-11-08 12:16:15
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德州仪器 - TI 转换器
页数 文件大小 规格书
28页 970K
描述
4.5V to 18V Input, 5.5-A Synchronous Step-Down Converter with Eco-Mode™

TPS54526 数据手册

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TPS54526  
www.ti.com  
SLVSB84 MAY 2012  
4.5V to 18V Input, 5.5-A Synchronous Step-Down Converter with Eco-Mode™  
Check for Samples: TPS54526  
1
FEATURES  
DESCRIPTION  
The TPS54526 is an adaptive on-time D-CAP2™  
mode synchronous buck converter. The TPS54526  
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  
TPS54526 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 TPS54526 to maintain high efficiency during  
lighter load conditions. The TPS54526 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  
4.5-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 start time and a  
power good function. The TPS54526 is available in  
the 14-pin HTSSOP package and the 16 pin QFN  
package, 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 m(High Side) and 33 m(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  
Auto-Skip Eco-mode™ for High Efficiency at  
Light Load  
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  
TPS54526PWP  
Slew Rate (0.35A/µsec)  
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, 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.  
Copyright © 2012, Texas Instruments Incorporated  

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