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TPS40305 PDF预览

TPS40305

更新时间： 2024-11-20 07:04:47
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
29页 1724K
描述
3-V TO 20-V INPUT SYNCHRONOUS BUCK CONTROLLER

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中文翻译

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TPS40305 数据手册

 浏览型号TPS40305的Datasheet PDF文件第2页浏览型号TPS40305的Datasheet PDF文件第3页浏览型号TPS40305的Datasheet PDF文件第4页浏览型号TPS40305的Datasheet PDF文件第5页浏览型号TPS40305的Datasheet PDF文件第6页浏览型号TPS40305的Datasheet PDF文件第7页 
TPS40303, TPS40304, TPS40305  
www.ti.com  
SLUS964 –NOVEMBER 2009  
3-V TO 20-V INPUT SYNCHRONOUS BUCK CONTROLLER  
Check for Samples :TPS40303 TPS40304 TPS40305  
1
FEATURES  
CONTENTS  
•
Input Voltage Range from 3 V to 20 V  
Device Ratings  
2
3
•
300 KHz (TPS40303), 600 KHz (TPS40304) and  
1.2 MHz (TPS40305) Switching Frequencies  
Electrical Characteristics  
Device Information  
Application Information  
Design Examples  
Additional References  
X
8
•
•
High- and Low-Side FET RDS(on) Current  
Sensing  
10  
14  
24  
Programmable Thermally Compensated OCP  
Levels  
•
•
•
•
•
•
•
Programmable Soft-Start  
600 mV, 1% Reference Voltage  
Voltage Feed-Forward Compensation  
Supports Pre-Biased Output  
APPLICATIONS  
•
•
•
•
POL Modules  
Printer  
Digital TV  
Telecom  
Frequency Spread Spectrum  
Thermal Shutdown Protection at 145°C  
10-Pin 3 mm × 3 mm SON Package with  
Ground Connection to Thermal Pad  
DESCRIPTION  
The TPS4030x is a family of cost-optimized synchronous buck controllers that operate from 3-V to 20-V input.  
The controller implements a voltage-mode control architecture with input-voltage feed-forward compensation that  
responds instantly to input voltage change. The switching frequency is fixed at 300 KHz, 600 KHz or 1.2 MHz.  
Frequency Spread Spectrum feature adds dither to the switching frequency, significantly reducing the peak EMI  
noise and making it much easier to comply with EMI standards.  
The TPS4030x offers design with a variety of user programmable functions, including soft-start, Over- Current  
Protection (OCP) levels, and loop compensation.  
OCP level may be programmed by a single external resistor connected from LDRV pin to circuit ground. During  
initial power on, the TPS4030x enters a calibration cycle, measures the voltage at the LDRV pin, and sets an  
internal OCP voltage level. During operation, the programmed OCP voltage level is compared to the voltage drop  
across the low side FET when it is on to determine whether there is an overcurrent condition. The TPS4030x  
then enters a shutdown and restart cycle until the fault is removed.  
SIMPLIFIED APPLICATION DIAGRAM  
V
OUT  
V
TPS4030x  
IN  
5
4
3
2
1
FB  
BOOT  
HDRV  
SW  
6
7
8
9
COMP  
V
OUT  
PGOOD  
EN/SS LDRV/OC  
SD  
V
VDD  
BP 10  
GND  
PAD  
IN  
UDG-09158  
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 © 2009, Texas Instruments Incorporated  
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TPS40305 替代型号

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