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TPS74701

更新时间： 2024-11-25 04:27:27
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德州仪器 - TI 稳压器软启动
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24页 728K
描述
500mA Low-Dropout Linear Regulator with Programmable Soft-Start

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TPS74701 数据手册

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TPS74701  
www.ti.com  
SBVS099A–NOVEMBER 2007–REVISED NOVEMBER 2007  
500mA Low-Dropout Linear Regulator with Programmable Soft-Start  
1
FEATURES  
DESCRIPTION  
2
•
Ultra-Low VIN and VOUT Range: 0.8V to 5.5V  
The TPS74701 low-dropout (LDO) linear regulator  
provides an easy-to-use, robust power management  
•
•
•
VBIAS Range 2.7V to 5.5V  
Low Dropout: 50mV typ at 500mA, VBIAS = 5V  
solution for  
a
wide variety of applications.  
Power Good (PG) Output Allows Supply  
Monitoring or Provides a Sequencing Signal  
for Other Supplies  
User-programmable soft-start minimizes stress on the  
input power source by reducing capacitive inrush  
current on start-up. The soft-start is monotonic and  
well-suited for powering many different types of  
processors and ASICs. The enable input and power  
good output allow easy sequencing with external  
regulators. This complete flexibility permits the user to  
configure a solution that meets the sequencing  
requirements of FPGAs, DSPs, and other  
applications with special start-up requirements.  
•
•
2% Accuracy Over Line/Load/Temperature  
Programmable Soft-Start Provides Linear  
Voltage Startup  
•
VBIAS Permits Low VIN Operation with Good  
Transient Response  
•
•
Stable with Any Output Capacitor ≥ 2.2µF  
A precision reference and error amplifier deliver 2%  
accuracy over load, line, temperature, and process.  
The device is stable with any type of capacitor  
greater than or equal to 2.2µF, and is fully specified  
from –40°C to +125°C. The TPS74701 is offered in a  
small 3mm × 3mm SON-10 package for compatibility  
with the TPS74801.  
Available in a Small 3mm × 3mm × 1mm  
SON-10 Package  
APPLICATIONS  
•
•
•
•
FPGA Applications  
DSP Core and I/O Voltages  
Post-Regulation Applications  
Applications with Special Start-Up Time or  
Sequencing Requirements  
•
Hot-Swap and Inrush Controls  
CSS = 0nF  
CSS = 560pF  
VIN  
IN  
PG  
CSS = 5600pF  
0.5V/div  
VOUT  
R3  
R1  
CIN  
BIAS  
EN  
SS  
VOUT  
OUT  
TPS74701  
VBIAS  
COUT  
FB  
GND  
CBIAS  
3.8V  
VEN  
CSS  
R2  
1.8V  
1V/div  
Time (2ms/div)  
Figure 1. Typical Application Circuit (Adjustable)  
Figure 2. Turn-On Response  
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
All trademarks are the property of their respective owners.  
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, Texas Instruments Incorporated  
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TPS74701 替代型号

型号 品牌 替代类型 描述 数据表
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 		具有电源正常指示和使能功能的汽车类 1.5A、0.8V 低噪声可调节 LDO 稳压器 |

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