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TPS54239E

更新时间： 2024-11-23 12:25:11
品牌 Logo 应用领域
德州仪器 - TI 转换器
页数 文件大小 规格书
21页 1003K
描述
4.5V to 23V Input, 2-A Synchronous Step-Down SWIFT Converter With Eco-mode

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TPS54239E 数据手册

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TPS54239E  
www.ti.com  
SLVSBT1 –JANUARY 2013  
4.5V to 23V Input, 2-A Synchronous Step-Down SWIFT™ Converter With Eco-mode™  
Check for Samples: TPS54239E  
1
FEATURES  
DESCRIPTION  
The TPS54239E is an adaptive on-time D-CAP2™  
mode synchronous buck converter. The TPS54239E  
enables system designers to complete the suite of  
various end-equipment power bus regulators with a  
cost effective, low component count, low standby  
current solution. The main control loop for the  
TPS54239E uses the D-CAP2™ mode control that  
provides a 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  
TPS54239 to maintain high efficiency during lighter  
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 23 V  
Output Voltage Range: 0.76 V to 7.0 V  
Highly Efficient Integrated FETs Optimized  
for Lower Duty Cycle Applications  
– 140 mΩ (High Side) and 70 mΩ (Low Side)  
•
•
•
•
•
•
•
High Efficiency, less than 10 μA at shutdown  
High Initial Bandgap Reference Accuracy  
Adjustable Soft Start  
load conditions. The TPS54239E 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 23-V VIN input. The output voltage can  
be programmed between 0.76 V and 7 V. The device  
also features an adjustable soft start time. The  
TPS54239E is available in the 8-pin DDA package,  
and designed to operate from –40°C to 85°C.  
Pre-Biased Soft Start  
600-kHz Switching Frequency (fSW  
)
Cycle By Cycle Over Current Limit  
Auto-Skip Eco-mode™ for High Efficiency at  
Light Load  
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)  
VIN  
Vout (50 mV/div)  
Iout (1 A/div)  
TPS54239EDDA  
8
7
6
5
1
2
3
4
VBST  
VIN  
SS  
EN  
EN  
VOUT  
SW  
VREG5  
GND  
VFB  
VOUT  
PwPd  
9
100 us/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 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 © 2013, Texas Instruments Incorporated  
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TPS54239E 替代型号

型号 品牌 替代类型 描述 数据表
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