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TPS74801-Q1

更新时间： 2024-11-23 12:16:19
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德州仪器 - TI 稳压器软启动
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22页 734K
描述
1.5 A Low-Dropout Linear Regulator with Programmable Soft-Start

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TPS74801-Q1 数据手册

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TPS74801-Q1  
www.ti.com  
SLVSAI4A –OCTOBER 2010–REVISED FEBRUARY 2011  
1.5 A Low-Dropout Linear Regulator with Programmable Soft-Start  
Check for Samples: TPS74801-Q1  
1
FEATURES  
2
•
•
•
•
•
•
Qualified for Automotive Applications  
DESCRIPTION  
VOUT Range: 0.8V to 3.6V  
The TPS74801-Q1 low-dropout (LDO) linear regulator  
provides an easy-to-use robust power management  
Ultralow VIN Range: 0.8V to 5.5V  
VBIAS Range 2.7V to 5.5V  
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: 60mV typ at 1.5A, VBIAS = 5V  
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 2.2μF, and is fully specified  
from –40°C to +105°C. The TPS74801-Q1 is offered  
in a small 3mm × 3mm SON-10 package, yielding a  
highly compact, total solution size.  
•
•
Stable with Any Output Capacitor ≥ 2.2μF  
Available in a Small 3mm x 3mm x 1mm  
SON-10 and 5 x 5 QFN-20 Packages  
APPLICATIONS  
•
•
•
•
FPGA Applications  
DSP Core and I/O Voltages  
Post-Regulation Applications  
Applications with Special Start-Up Time or  
Sequencing Requirements  
CSS = 0nF  
•
Hot-Swap and Inrush Controls  
CSS = 1nF  
CSS = 2.2nF  
0.5V/div  
VOUT  
VIN  
IN  
PG  
R3  
R1  
CIN  
BIAS  
EN  
SS  
1.2V  
VEN  
VOUT  
OUT  
TPS74801  
0V  
1V/div  
VBIAS  
COUT  
FB  
GND  
CBIAS  
CSS  
R2  
Time (1ms/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.  
All trademarks are the property of their respective owners.  
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.  
© 2010–2011, Texas Instruments Incorporated  
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