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TPS54325-Q1 PDF预览

TPS54325-Q1

更新时间： 2024-11-05 12:47:11
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德州仪器 - TI 输出元件
页数 文件大小 规格书
18页 669K
描述
4.5-V to 18-V, 3-A OUTPUT SYNCHRONOUS STEP DOWN SWITCHER WITH INTEGRATED FET ( SWIFT™)

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TPS54325-Q1 数据手册

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TPS54325-Q1  
www.ti.com  
SLVSAT1 –JUNE 2011  
4.5-V to 18-V, 3-A OUTPUT SYNCHRONOUS STEP DOWN SWITCHER  
WITH INTEGRATED FET ( SWIFT™)  
Check for Samples: TPS54325-Q1  
1
FEATURES  
23  
•
Qualified for Automotive Applications  
•
•
•
•
Pre-Biased Soft Start  
700-kHz Switching Frequency (fSW)  
Cycle By Cycle Over Current Limit  
•
D-CAP2™ Mode Enables Fast Transient  
Response  
Low Output Ripple and Allows Ceramic Output  
Capacitor  
Wide VCC Input Voltage Range: 4.5 V to 18 V  
Wide VIN Input Voltage Range: 2.0 V to 18 V  
Output Voltage Range: 0.76 V to 5.5 V  
Highly Efficient Integrated FET’s Optimized  
for Lower Duty Cycle Applications  
–120 mΩ (High Side) and 70 mΩ (Low Side)  
High Efficiency, less than 10 μA at shutdown  
High Initial Bandgap Reference Accuracy  
Adjustable Soft Start  
•
Power Good Output  
APPLICATIONS  
•
•
•
•
•
Wide Range of Applications for Low Voltage  
System  
–
–
–
–
Digital TV Power Supply  
High Definition Blue-ray Disc™ Players  
Networking Home Terminal  
Digital Set Top Box (STB)  
•
•
•
DESCRIPTION  
The TPS54325-Q1 is an adaptive on-time D-CAP2™ mode synchronous buck converter. The TPS54325-Q1  
enables system designers to complete the suite of various end equipment’s power bus regulators with a cost  
effective, low component count, low standby current solution. The main control loop for the TPS54325-Q1 uses  
the D-CAP2™ mode control which provides a very fast transient response with no external components. The  
TPS54325-Q1 also has a proprietary circuit that enables the device to adapt to both low equivalent series  
resistance (ESR) output capacitors, such as POSCAP or SP-CAP, and ultra-low ESR ceramic capacitors. The  
device operates from 4.5-V to 18-V VCC input , and from 2.0-V to 18-V VIN input power supply voltage. The  
output voltage can be programmed between 0.76 V and 5.5 V. The device also features an adjustable slow start  
time and a power good function. The TPS54325-Q1 is available in the 14 pin HTSSOP package, and designed to  
operate from –40°C to 105°C.  
VOUT (50 mV / div)  
IOUT (2 A / div)  
100 µs / div  
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
3
SWIFT, D-CAP2, PowerPAD are trademarks of Texas Instruments.  
Blue-ray Disc is a trademark of Blu-ray Disc.  
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 © 2011, Texas Instruments Incorporated  
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