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TPS74701-Q1

更新时间： 2024-11-25 12:47:11
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德州仪器 - TI 稳压器软启动
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500-mA LOW-DROPOUT LINEAR REGULATOR WITH PROGRAMMABLE SOFT-START

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TPS74701-Q1  
www.ti.com  
SBVS141A –APRIL 2010–REVISED SEPTEMBER 2010  
500-mA LOW-DROPOUT LINEAR REGULATOR WITH PROGRAMMABLE SOFT-START  
Check for Samples: TPS74701-Q1  
1
FEATURES  
DESCRIPTION  
•
Qualified for Automotive Applications  
The TPS74701 low-dropout (LDO) linear regulator  
provides an easy-to-use, robust power management  
•
•
•
•
•
VOUT Range: 0.8 V to 3.6 V  
Ultralow VIN Range: 0.8 V to 5.5 V  
VBIAS Range 2.7 V to 5.5 V  
solution for  
a
wide variety of applications.  
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.  
Low Dropout: 50 mV typ at 500 mA, VBIAS = 5 V  
Power Good (PG) Output Allows Supply  
Monitoring or Provides a Sequencing Signal  
for Other Supplies  
•
•
2% Accuracy Over Line/Load/Temperature  
Programmable Soft-Start Provides Linear  
Voltage Startup  
•
VBIAS Permits Low VIN Operation with Good  
Transient Response  
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 2.2mF, 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.  
•
•
Stable with Any Output Capacitor ≥ 2.2 mF  
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  
CSS = 5600pF  
0.5V/div  
VOUT  
VIN  
IN  
PG  
R3  
R1  
CIN  
BIAS  
EN  
SS  
VOUT  
OUT  
TPS74701  
VBIAS  
3.8V  
COUT  
VEN  
FB  
GND  
CBIAS  
1.8V  
CSS  
1V/div  
R2  
Time (2ms/div)  
Figure 2. Turn-On Response  
Figure 1. Typical Application Circuit (Adjustable)  
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.  
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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