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TPS54331-Q1

更新时间： 2024-11-18 12:47:11
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
27页 1052K
描述
3-A, 28-V INPUT, STEP-DOWN SWIFT™ DC/DC CONVERTER WITH Eco-Mode™

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TPS54331-Q1 数据手册

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TPS54331-Q1  
www.ti.com  
SLVSAB5 –NOVEMBER 2010  
3-A, 28-V INPUT, STEP-DOWN SWIFT™ DC/DC CONVERTER WITH Eco-Mode™  
Check for Samples: TPS54331-Q1  
1
FEATURES  
APPLICATIONS  
•
Consumer Applications such as Set-Top  
Boxes, CPE Equipment, LCD Displays,  
Peripherals, and Battery Chargers  
Industrial and Car Audio Power Supplies  
5-V, 12-V and 24-V Distributed Power Systems  
2
•
Qualified for Automotive Applications  
•
•
•
3.5V to 28V Input Voltage Range  
Adjustable Output Voltage Down to 0.8V  
•
•
Integrated 80 mΩ High Side MOSFET Supports  
up to 3A Continuous Output Current  
•
High Efficiency at Light Loads with Pulse  
Skipping Eco-mode™ Control  
DESCRIPTION  
The TPS54331 is a 28-V, 3-A 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 mA 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 TPS54331 is  
available in an 8-pin SOIC package that has been  
internally optimized to improve thermal performance.  
•
•
•
•
•
•
Fixed 570kHz Switching Frequency  
Typical 1mA 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 Easy-to-Use SOIC8 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  
SIMPLIFIED SCHEMATIC  
EFFICIENCY  
100  
90  
Ren1  
EN  
VIN  
CI  
VIN  
Ren2  
80  
V
= 12 V  
TPS54331  
I
70  
60  
V
= 18 V  
CBOOT  
I
BOOT  
PH  
V
= 24 V  
I
LO  
V
= 28 V  
50  
40  
I
VOUT  
V
= 5 V  
I
SS  
CO  
D1  
RO1  
COMP  
30  
20  
10  
0
C1  
R3  
CSS  
C2  
VSENSE  
GND  
V
1
= 3.3 V  
O
RO2  
0.01  
0.1  
10  
I
- Load Current - A  
L
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.  
SWIFT, Eco-mode, SwitcherPro, PowerPAD are trademarks of Texas Instruments.  
2
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 © 2010, Texas Instruments Incorporated  
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 		具有 570kHz 固定频率的 4.2V 至 28V 输入电压、3A 输出电流同步降压转换
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