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TPS5432

更新时间： 2024-11-30 11:44:23
品牌 Logo 应用领域
德州仪器 - TI 转换器
页数 文件大小 规格书
28页 1132K
描述
2.95V to 6V Input, 3A Output, 700kHz Synchronous Step Down Converter

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TPS5432 数据手册

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TPS5432  
www.ti.com  
SLVSB89 –MARCH 2012  
2.95V to 6V Input, 3A Output, 700kHz Synchronous Step Down Converter  
Check for Samples: TPS5432  
1
FEATURES  
DESCRIPTION  
The TPS5432 is a 6V, 3A, low Iq, current mode,  
synchronous monolithic buck converter with  
integrated MOSFETs. The TPS5432 enables small  
designs by integrating the MOSFETs, implementing  
current mode control to reduce external component  
count, reducing inductor size by 700kHz switching  
frequency. SOIC-8 package with exposed thermal  
pad provides both thermally enhanced solution and  
easy to use.  
2
•
Two 70mΩ (typical) MOSFETs for 3A  
Continuous Output Current  
•
Current Mode Control With External  
Compensation  
•
•
700kHz Switching Frequency  
360µA no Load Quiescent Operating Current  
(no switching)  
•
•
•
0.808V Internal Voltage Reference  
±2.0% Reference Accuracy at 25°C  
The TPS5432 provides accurate regulation for a  
variety of loads with an accurate 3.0% voltage  
reference over temperature.  
±3.0% Reference Accuracy Over Temperature  
Range –20°C~125°C  
Efficiency is maximized through the integrated 70mΩ  
MOSFETs and 360μA typical supply current. Using  
the enable pin, shutdown supply current is reduced to  
2 µA by entering a shutdown mode.  
•
Stable Operation With Ceramic Output  
Capacitor  
•
•
Adjustable Slow Start  
Cycle by Cycle Current Limit, and Frequency  
Fold Back Protection  
The output voltage startup ramp is controlled by the  
slow start pin. A ceramic capacitor at this pin can  
easily adjust the slow start time.  
•
Thermally Enhanced 8-Pin SOIC (DDA)  
Package  
Frequency fold back and thermal shutdown protects  
the device during an over-current condition.  
APPLICATIONS  
•
Consumer Applications such as DTV, Set Top  
Boxes, LCD displays, CPE  
•
Low-Voltage Point-of-Load Regulations for  
SoC, CPU, DSP  
100  
SIMPLIFIED SCHEMATIC  
95  
90  
85  
80  
INPUT  
3-6 V  
2
CBOOT  
VIN  
BOOT  
Cin  
1
LO  
0.1 mF  
10 V  
3
10 mF  
TPS5432  
3.3 mH 1.2 V@3 A  
75  
70  
10 V  
PH  
CO  
7
6
8
Vin = 5 V, Vout = 1.2 V  
Vin = 3.3 V, Vout = 1.2 V  
Vin = 5 V, Vout = 1.8 V  
Vin = 3.3 V, Vout = 1.8 V  
65  
60  
55  
50  
R1  
10 kW  
22 mFx2  
EN  
Cff  
390 pF  
5
4
VSENSE  
GND  
COMP  
R2  
20 kW  
Vin = 5 V, Vout = 3.3 V  
Rc  
4.99 kW  
SS  
0
500  
1000  
1500  
2000  
Load Current - mA  
2500  
3000  
Cc  
3.3 nF  
Css  
0.01 mF  
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
PowerPAD 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 © 2012, Texas Instruments Incorporated  
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