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TPS62140_13 PDF预览

TPS62140_13

更新时间: 2024-09-28 12:30:27
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德州仪器 - TI 转换器
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35页 1786K
描述
3-V to 17-V 2-A Step-Down Converter in 3x3 QFN Package

TPS62140_13 数据手册

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TPS62140, TPS62140A  
TPS62141, TPS62142, TPS62143  
www.ti.com  
SLVSAJ0B NOVEMBER 2011REVISED JUNE 2013  
3-V to 17-V 2-A Step-Down Converter in 3x3 QFN Package  
Check for Samples: TPS62140, TPS62140A, TPS62141, TPS62142, TPS62143  
1
FEATURES  
DESCRIPTION  
The TPS6214X family is an easy-to-use synchronous  
step-down dc-dc converter optimized for applications  
with high power density. A high switching frequency  
of typically 2.5MHz allows the use of small inductors  
and provides fast transient response by use of the  
DCS-Control™ topology.  
DCS-ControlTM Topology  
Input Voltage Range: 3 V to 17 V  
Up to 2-A Output Current  
Adjustable Output Voltage from 0.9 V to 6 V  
Pin-Selectable Output Voltage (Nominal, +5%)  
Programmable Soft Start and Tracking  
Seamless Power-Save Mode Transition  
Quiescent Current of 17 µA (typ.)  
Selectable Operating Frequency  
Power-Good Output  
With its wide operating input voltage range of 3V to  
17V, the devices are ideally suited for systems  
powered from either a Li-Ion or other batteries, as  
well as from 12-V intermediate power rails. It  
supports up to 2A of continuous output current at  
output voltages between 0.9V and 6V (with 100%  
duty-cycle mode).  
100% Duty-Cycle Mode  
The output voltage start-up ramp is controlled by the  
soft-start pin, which allows operation as either a  
standalone power supply or in tracking configurations.  
Power sequencing is also possible by configuring the  
Enable (EN) and open-drain Power Good (PG) pins.  
Short-Circuit Protection  
Over Temperature Protection  
Available in a 3-mm × 3-mm, QFN-16 Package  
APPLICATIONS  
In power-save mode, the devices show quiescent  
current of about 17μA from VIN. Power Save Mode,  
entered automatically and seamlessly if load is small,  
maintains high efficiency over the entire load range.  
In Shutdown Mode, the device is turned off and  
shutdown current consumption is less than 2μA.  
Standard 12-V Rail Supplies  
POL Supply From Single or Multiple Li-Ion  
Battery  
Solid-State Disk Drives  
Embedded Systems  
The device, available in adjustable and fixed output  
voltage versions, is packaged in a 16-pin QFN  
package measuring 3 × 3 mm (RGT).  
LDO Replacement  
Mobile PCs, Tablet, Modems, Cameras  
spacing  
(3 .. 17)V  
2.2 µH  
1.8V / 2A  
PVIN  
AVIN  
EN  
SW  
VOS  
PG  
100k  
10uF  
22uF  
TPS62141  
SS/TR  
DEF  
FB  
3.3nF  
AGND  
PGND  
FSW  
Figure 1. Typical Application and Efficiency  
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.  
PRODUCTION DATA information is current as of publication date.  
Copyright © 2011–2013, Texas Instruments Incorporated  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
 

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