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TPS53124 PDF预览

TPS53124

更新时间: 2024-09-28 04:27:31
品牌 Logo 应用领域
德州仪器 - TI 控制器
页数 文件大小 规格书
22页 720K
描述
Dual Synchronous Step-Down Controller For Low-Voltage Power Rails

TPS53124 数据手册

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TPS53124  
www.ti.com ..................................................................................................................................................... SLUS825BFEBRUARY 2008REVISED MAY 2008  
Dual Synchronous Step-Down Controller For Low-Voltage Power Rails  
1
FEATURES  
DESCRIPTION  
2
High Efficiency, Low-Power Consumption  
D-Cap Mode Enables Fast Transient Response  
High Initial Reference Accuracy  
The TPS53124 is a dual, Adaptive on-time DCAP™  
mode synchronous controller. The part enables  
system designers to cost effectively complete the  
suite of digital TV power bus regulators with the  
absolute lowest external component count and lowest  
standby consumption. The main control loop for the  
TPS53124 uses the D-CAP™ mode that optimized  
for low ESR output capacitors such as POSCAP or  
SP-CAP promises fast transient response with no  
Low Output Ripple  
Wide Input Voltage Range: 4.5 V to 24 V  
Output Voltage Range: 0.76 V to 5.5 V  
Low-Side RDS(on) Loss-less Current Sensing  
Adaptive Gate Drivers with Integrated Boost  
Diode  
external compensation. The part provides  
a
convenient and efficient operation with conversion  
voltages from 4.5 V to 24 V and output voltage from  
0.76 V to 5.5 V.  
Internal 1.2-ms Voltage-Servo Soft Start  
Built-In 5-V Linear Regulator  
The TPS53124 is available in the 24-pin RGE  
package and in the 28-pin PW package and is  
specified from -40°C to 85°C ambient temperature  
range.  
APPLICATIONS  
Digital TV Power Supply  
Networking Home Terminal  
Digital STB  
TYPICAL APPLICATION DIAGRAM  
Input Voltage  
C9  
SGND  
R5  
R2  
SGND  
PGND  
R4  
R1  
6
5
4
3
2
1
7
24  
EN2  
EN1  
C5  
0.1uF  
8
9
VBST1 23  
VBST2  
DRVH2  
C3  
C6  
C2  
0.1uF  
Power PAD  
4.7uF  
Q3  
L2  
4.7uF  
VO2  
1.8V  
DRVH1 22  
Q1  
Q2  
L1  
VO1  
TPS53124RGE  
(QFN24)  
10  
21  
LL1  
LL2  
3.3uH  
Q4  
3.3uH  
1.05 V  
11  
12  
DRVL120  
PGND1 19  
DRVL2  
PGND2  
C1  
C4  
13  
14  
15  
16  
17  
18  
R6  
R3  
PGND  
PGND  
C7  
4.7 uF  
C8  
1 uF  
PGND  
SGND  
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
DCAP is a trademark of Texas Instruments.  
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 © 2008, Texas Instruments Incorporated  

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