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TPS5420-Q1

更新时间： 2024-11-20 12:21:59
品牌 Logo 应用领域
德州仪器 - TI 转换器输入元件
页数 文件大小 规格书
22页 565K
描述
2-A WIDE-INPUT-RANGE STEP-DOWN SWIFT™ CONVERTER

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TPS5420-Q1 数据手册

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TPS5420-Q1  
www.ti.com................................................................................................................................................... SLVS752B–NOVEMBER 2007–REVISED JUNE 2008  
2-A WIDE-INPUT-RANGE STEP-DOWN SWIFT™ CONVERTER  
1
FEATURES  
APPLICATIONS  
•
•
•
Industrial and Car Audio Power Supplies  
Battery Chargers, High-Power LED Supplies  
12-V/24-V Distributed Power Systems  
2
•
Qualified for Automotive Applications  
•
•
Wide Input Voltage Range: 5.5 V to 36 V  
Up to 2-A Continuous (3-A Peak) Output  
Current  
DESCRIPTION  
•
•
•
•
•
•
High Efficiency up to 95% Enabled by 110-mΩ  
Integrated MOSFET Switch  
As a member of the SWIFT family of dc/dc regulators,  
the TPS5420 is a high-output-current PWM converter  
that integrates a low-resistance high-side N-channel  
MOSFET. Included on the substrate with the listed  
features is 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  
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  
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 TPS5420  
feedback loop is internally compensated.  
System Protected by Over Current Limiting,  
Over Voltage Protection, and Thermal  
Shutdown  
•
–40°C to 125°C Operating Junction  
Temperature Range  
•
•
Available in Small 8-Pin SOIC Package  
The TPS5420 device is available in an easy-to-use  
8-pin SOIC package. TI provides evaluation modules  
and the SWIFT Designer software tool to aid in  
quickly achieving high-performance power supply  
designs to meet aggressive equipment development  
cycles.  
For SWIFT™ Documentation, Application  
Notes and Design Software, See the TI Website  
at www.ti.com/swift  
Simplified Schematic  
Efficiency vs Output Current  
100  
VIN  
VOUT  
VIN  
PH  
95  
90  
85  
TPS5420  
BOOT  
NC  
NC  
80  
VI = 12 V  
75  
70  
ENA VSENSE  
GND  
65  
60  
55  
50  
0
0.5  
1
1.5  
2
2.5  
3
I
- Output Current - 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
SWIFT 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 © 2007–2008, Texas Instruments Incorporated  
1234567...22

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