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TPS54232

更新时间： 2024-11-06 07:04:47
品牌 Logo 应用领域
德州仪器 - TI 转换器
页数 文件大小 规格书
24页 946K
描述
2A, 28V, 1MHz, STEP DOWN SWIFT™ DC/DC CONVERTER WITH ECO-MODE™

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TPS54232 数据手册

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TPS54232  
www.ti.com ........................................................................................................................................................................................... SLVS876–NOVEMBER 2008  
2A, 28V, 1MHz, STEP DOWN SWIFT™ DC/DC CONVERTER WITH ECO-MODE™  
1
FEATURES  
DESCRIPTION  
2
•
•
•
3.5V to 28V Input Voltage Range  
Adjustable Output Voltage Down to 0.8V  
The TPS54232 is a 28-V, non-synchronous buck  
converter that integrates a low Rds(on) high side  
MOSFET. To increase efficiency at light loads, a  
pulse skipping Eco-mode™ feature is automatically  
activated. Furthermore, the 1 µA shutdown supply  
current allows the device to be used in battery  
powered applications. Current mode control with  
internal slope compensation simplifies the external  
compensation calculations and reduces component  
count while allowing the use of ceramic output  
capacitors. A resistor divider programs the hysteresis  
of the input under-voltage lockout. An overvoltage  
transient protection circuit limits voltage overshoots  
during startup and transient conditions. A cycle by  
cycle current limit scheme, frequency fold back and  
thermal shutdown protect the device and the load in  
the event of an overload condition. The TPS54232 is  
available in an 8-pin SOIC package.  
Integrated 80 mΩ High Side MOSFET Supports  
up to 2A Continuous Output Current  
•
High Efficiency at Light Loads with a Pulse  
Skipping Eco-mode™  
•
•
•
•
•
•
Fixed 1MHz Switching Frequency  
Typical 1µA Shutdown Quiescent Current  
Adjustable Slow Start Limits Inrush Currents  
Programmable UVLO Threshold  
Overvoltage Transient Protection  
Cycle by Cycle Current Limit, Frequency Fold  
Back and Thermal Shutdown Protection  
•
•
Available in 8-Pin SOIC Package  
Supported by SwitcherPro™ Software Tool  
(http://focus.ti.com/docs/toolsw/folders/print/s  
witcherpro.html)  
•
For SWIFT™ Documentation, See the TI  
Website at www.ti.com/swift  
APPLICATIONS  
•
Consumer Applications such as Set-Top  
Boxes, CPE Equipment, LCD Displays,  
Peripherals, and Battery Chargers  
•
•
Industrial and Car Audio Power Supplies  
5V, 12V and 24V Distributed Power Systems  
SIMPLIFIED SCHEMATIC  
EFFICIENCY  
100  
Ren1  
VO = 3.3 V  
95  
EN  
VIN  
CI  
VIN  
VI = 5 V  
Ren2  
90  
TPS54232  
VI = 12 V  
85  
80  
75  
70  
CBOOT  
BOOT  
PH  
LO  
VOUT  
VI = 15 V  
SS  
CO  
D1  
RO1  
COMP  
C1  
R3  
65  
60  
CSS  
C2  
VSENSE  
GND  
0
0.25 0.5 0.75  
1
1.25 1.5 1.75  
2
RO2  
IO - Output Current - A  
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, Eco-mode, SwitcherPro are trademarks 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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TPS54232 替代型号

型号 品牌 替代类型 描述 数据表
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