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TPS731XX

更新时间： 2024-11-26 04:48:35
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德州仪器 - TI 稳压器
页数 文件大小 规格书
18页 301K
描述
Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection

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TPS731XX 数据手册

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TPS731xx  
www.ti.com  
SBVS034H–SEPTEMBER 2003–REVISED OCTOBER 2006  
Cap-Free, NMOS, 150mA Low Dropout Regulator  
with Reverse Current Protection  
FEATURES  
DESCRIPTION  
•
Stable with No Output Capacitor or Any Value  
or Type of Capacitor  
The TPS731xx family of low-dropout (LDO) linear  
voltage regulators uses a new topology: an NMOS  
pass element in a voltage-follower configuration. This  
topology is stable using output capacitors with low  
ESR, and even allows operation without a capacitor.  
It also provides high reverse blockage (low reverse  
current) and ground pin current that is nearly  
constant over all values of output current.  
•
•
•
Input Voltage Range of 1.7V to 5.5V  
Ultralow Dropout Voltage: 30mV Typ  
Excellent Load Transient Response—with or  
without Optional Output Capacitor  
•
New NMOS Topology Provides Low Reverse  
Leakage Current  
The TPS731xx uses an advanced BiCMOS process  
to yield high precision while delivering very low  
dropout voltages and low ground pin current. Current  
consumption, when not enabled, is under 1µA and  
ideal for portable applications. The extremely low  
output noise (30µVRMS with 0.1µF CNR) is ideal for  
powering VCOs. These devices are protected by  
thermal shutdown and foldback current limit.  
•
•
•
Low Noise: 30µVRMS Typ (10kHz to 100kHz)  
0.5% Initial Accuracy  
1% Overall Accuracy over Line, Load, and  
Temperature  
•
•
Less Than 1µA Max IQ in Shutdown Mode  
Thermal Shutdown and Specified Min/Max  
Current Limit Protection  
•
Available in Multiple Output Voltage Versions  
– Fixed Outputs of 1.20V to 5.0V  
– Adjustable Outputs from 1.20V to 5.5V  
– Custom Outputs Available  
APPLICATIONS  
•
•
•
•
Portable/Battery-Powered Equipment  
Post-Regulation for Switching Supplies  
Noise-Sensitive Circuitry such as VCOs  
Point of Load Regulation for DSPs, FPGAs,  
ASICs, and Microprocessors  
Optional  
Optional  
DBV PACKAGE  
SOT23  
(TOP VIEW)  
VIN  
VOUT  
IN  
OUT  
TPS731xx  
GND  
EN  
NR  
5
4
IN  
GND  
EN  
1
2
3
OUT  
Optional  
Typical Application Circuit for Fixed-Voltage Versions  
NR/FB  
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.  
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 © 2003–2006, Texas Instruments Incorporated  
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