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TPS40021

更新时间： 2024-11-23 22:49:39
品牌 Logo 应用领域
德州仪器 - TI 输入元件控制器
页数 文件大小 规格书
32页 408K
描述
ENHANCED LOW INPUT VOLTAGE MODE SYNCHRONOUS BUCK CONTROLLER

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中文翻译

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TPS40021 数据手册

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8
www.ti.com  
SLUS535C − MARCH 2003 − REVISED SEPTEMBER 2004  
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FEATURES  
DESCRIPTION  
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Operating Input Voltage 2.25 V to 5.5 V  
The TPS4002x family of dc-to-dc controllers are designed  
for non-isolated synchronous buck regulators, providing  
enhanced operation and design flexability through user  
programmability.  
Output Voltage as Low as 0.7 V  
1% Internal 0.7 V Reference  
Predictive Gate DriveN-Channel MOSFET  
Drivers for Higher Efficiency  
The TPS4002x utilizes a proprietary Predictive Gate  
Drivetechnology to minimize the diode conduction  
losses associated with the high-side and synchronous  
rectifier N-channel MOSFET transistions. The integrated  
charge pump with boost circuit provides a regulated 5-V  
gate drive for both the high side and synchronous rectifier  
N-channel MOSFETs. The use of the Predictive Gate  
Drivetechnology and charge pump/boost circuits  
combine to provide a highly efficient, smaller and less  
expensive converter.  
Externally Adjustable Soft-Start and Short  
Circuit Current Limit  
Programmable Fixed-Frequency  
100 KHz-to-1 MHz Voltage-Mode Control  
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Source-Only Current or Source/Sink Current  
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Quick Response Output Transient  
Comparators with Power Good Indication  
Provide Output Status  
Design flexibility is provided through user programmability  
of such functions as: operating frequency, short circuit  
current detection thresholds, soft-start ramp time, and  
external synchronization frequency. The operating  
frequency is programmable using a single resistor over a  
frequency range of 100 kHz to 1 MHz. Higher operating  
frequencies yield smaller component values for a given  
converter power level as well as faster loop closure.  
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16-Pin PowerPADPackage  
APPLICATIONS  
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Networking Equipment  
Telecom Equipment  
Base Stations  
Servers  
DSP Power  
VDD  
VOUT  
TPS40020  
VDD 2.25 V − 5.5 V  
ILIM/  
SYNC  
1
2
3
4
5
6
7
8
16  
15  
BOOT1  
HDRV  
VOUT  
VDD  
OSNS  
FB  
SW 14  
BOOT2 13  
PVDD 12  
LDRV 11  
PGND 10  
COMP  
SS/SD  
RT  
SGND  
9
PWRGD  
UDG−02094  
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.  
PowerPADand Predictive Gate Driveare trademarks of Texas Instruments.  
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ꢤ ꢞꢜ ꢝꢞꢟ ꢠ ꢢꢞ ꢣ ꢧꢦ ꢤ ꢛ ꢝꢛ ꢤ ꢡ ꢢꢛ ꢞꢜꢣ ꢧ ꢦꢟ ꢢꢬꢦ ꢢꢦ ꢟ ꢠꢣ ꢞꢝ ꢀꢦꢭ ꢡꢣ ꢒꢜꢣ ꢢꢟ ꢥꢠ ꢦꢜꢢ ꢣ ꢣꢢ ꢡꢜꢪ ꢡꢟ ꢪ ꢮ ꢡꢟ ꢟ ꢡ ꢜꢢꢯꢫ  
ꢁꢟ ꢞ ꢪꢥꢤ ꢢ ꢛꢞ ꢜ ꢧꢟ ꢞ ꢤ ꢦ ꢣ ꢣ ꢛꢜ ꢰ ꢪꢞ ꢦ ꢣ ꢜꢞꢢ ꢜꢦ ꢤꢦ ꢣꢣ ꢡꢟ ꢛꢩ ꢯ ꢛꢜꢤ ꢩꢥꢪ ꢦ ꢢꢦ ꢣꢢꢛ ꢜꢰ ꢞꢝ ꢡꢩ ꢩ ꢧꢡ ꢟ ꢡꢠ ꢦꢢꢦ ꢟ ꢣꢫ  
Copyright 2004, Texas Instruments Incorporated  
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中文翻译

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TPS40021 替代型号

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