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LP38853T-ADJ/NOPB

更新时间： 2024-11-14 12:02:15
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德州仪器 - TI 稳压器软启动
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28页 1685K
描述
LP38853 3A Fast-Response High-Accuracy Adjustable LDO Linear Regulator with Enable and Soft-Start

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LP38853T-ADJ/NOPB 数据手册

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LP38853  
www.ti.com  
SNVS335D –DECEMBER 2006–REVISED APRIL 2013  
LP38853 3A Fast-Response High-Accuracy Adjustable LDO Linear Regulator with Enable  
and Soft-Start  
Check for Samples: LP38853  
1
FEATURES  
DESCRIPTION  
The LP38853-ADJ is a high current, fast response  
regulator which can maintain output voltage  
regulation with extremely low input to output voltage  
drop. Fabricated on a CMOS process, the device  
operates from two input voltages: VBIAS provides  
voltage to drive the gate of the N-MOS power  
transistor, while VIN is the input voltage which  
supplies power to the load. The use of an external  
bias rail allows the part to operate from ultra low VIN  
voltages. Unlike bipolar regulators, the CMOS  
architecture consumes extremely low quiescent  
current at any output load current. The use of an N-  
MOS power transistor results in wide bandwidth, yet  
minimum external capacitance is required to maintain  
loop stability.  
2
•
Adjustable VOUT Range of 0.80V to 1.8V  
•
Wide VBIAS Supply Operating Range of 3.0V to  
5.5V  
•
•
Stable with 10µF Ceramic Capacitors  
Dropout Voltage of 240 mV (typical) at 3A Load  
Current  
•
Precision VADJ Across All Line and Load  
Conditions:  
–
–
–
±1.5% VADJ for TJ = 25°C  
±2.0% VADJ for 0°C ≤ TJ ≤ +125°C  
±3.0% VADJ for -40°C ≤ TJ ≤ +125°C  
•
•
•
Over-Temperature and Over-Current  
Protection  
The fast transient response of this device makes it  
suitable for use in powering DSP, Microcontroller  
Core voltages and Switch Mode Power Supply post  
regulators. The part is available in SO PowerPAD  
8–pin, PFM 7–pin, and DDPAK 7-pin packages.  
Available in 8 Lead SO PowerPAD, 7 Lead PFM  
and 7 Lead DDPAK Packages  
−40°C to +125°C Operating Junction  
Temperature Range  
Dropout Voltage: 240 mV (typical) at 3A load  
current.  
APPLICATIONS  
•
ASIC Power Supplies in:  
Low Ground Pin Current: 10 mA (typical) at 3A load  
current.  
–
Desktops, Notebooks, and Graphics Cards,  
Servers  
Soft-Start: Programmable Soft-Start time.  
–
Gaming Set Top Boxes, Printers and  
Copiers  
Precision ADJ Voltage: ±1.5% for TJ = 25°C, and  
±2.0% for 0°C ≤ TJ ≤ +125°C, across all line and load  
conditions  
•
•
•
Server Core and I/O Supplies  
DSP and FPGA Power Supplies  
SMPS Post-Regulator  
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 © 2006–2013, Texas Instruments Incorporated  
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LP38853T-ADJ/NOPB 替代型号

型号 品牌 替代类型 描述 数据表
LP38853T-ADJ TI

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 LP38853 3A Fast-Response High-Accuracy Adjustable LDO Linear Regulator with Enable and Sof

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