Image TPS5430
型号: TPS5430
厂商: Texas Instruments Texas Instruments
标准:
分类: 半导体
描述: 3-A, wide input range, step-down swift converter(5.5V~36v输入,3A降压DC-DC转换器)
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TPS5430的详细信息

Detail: Feature
SLVS632E JANUARY 2006REVISED SEPTEMBER 2013  
Check for Samples: TPS5430 , TPS5431  
1
FEATURES  
DESCRIPTION  
The TPS5430/TPS5431 is  
2
Wide Input Voltage Range:  
a high-output-current  
TPS5430: 5.5 V to 36 V  
TPS5431: 5.5 V to 23 V  
PWM converter that integrates a low resistance high  
side N-channel MOSFET. Included on the substrate  
with the listed features are a high performance  
voltage error amplifier that provides tight voltage  
regulation accuracy under transient conditions; an  
undervoltage-lockout circuit to prevent start-up until  
the input voltage reaches 5.5 V; an internally set  
slow-start circuit to limit inrush currents; and a voltage  
feed-forward circuit to improve the transient  
response. Using the ENA pin, shutdown supply  
current is reduced to 18 μA typically. Other features  
include an active-high enable, overcurrent limiting,  
overvoltage protection and thermal shutdown. To  
reduce design complexity and external component  
count, the TPS5430/TPS5431 feedback loop is  
internally compensated. The TPS5431 is intended to  
operate from power rails up to 23 V. The TPS5430  
regulates a wide variety of power sources including  
24-V bus.  
Up to 3-A Continuous (4-A Peak) Output  
Current  
High Efficiency up to 95% Enabled by 110-m  
Integrated MOSFET Switch  
Wide Output Voltage Range: Adjustable Down  
to 1.22 V with 1.5% Initial Accuracy  
Internal Compensation Minimizes External  
Parts Count  
Fixed 500 kHz Switching Frequency for Small  
Filter Size  
Improved Line Regulation and Transient  
Response by Input Voltage Feed Forward  
System Protected by Overcurrent Limiting,  
Overvoltage Protection and Thermal Shutdown  
–40°C to 125°C Operating Junction  
Temperature Range  
The TPS5430/TPS5431 device is available in a  
thermally enhanced, easy to use 8-pin SOIC  
PowerPAD™ package. TI provides evaluation  
modules and the Designer software tool to aid in  
quickly achieving high-performance power supply  
designs to meet aggressive equipment development  
cycles.  
Available in Small Thermally Enhanced 8-Pin  
SOIC PowerPAD™ Package  
APPLICATIONS  
Consumer: Set-top Box, DVD, LCD Displays  
Industrial and Car Audio Power Supplies  
Battery Chargers, High Power LED Supply  
12-V/24-V Distributed Power Systems  
SimplifiedSchematic  
EfficiencyvsOutputCurrent  
100  
VIN  
VOUT  
VIN  
PH  
95  
90  
85  
80  
TPS5430/31  
BOOT  
NC  
NC  
75  
70  
ENA VSENSE  
GND  
VI =12V  
65  
VO =5V  
60  
fs =500kHz  
TA =25oC  
55  
50  
0
0.5  
1
1.5  
2
2.5  
3
3.5  
I
- OutputCurrent - A  
O
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 © 2006–2013, Texas Instruments Incorporated