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MPC1055L1R0C

更新时间： 2024-10-28 12:46:43
品牌 Logo 应用领域
德州仪器 - TI 存储电感器测试功率感应器双倍数据速率
页数 文件大小 规格书
34页 975K
描述
Complete DDR2, DDR3 and DDR3L Memory Power Solution Synchronous Buck

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MPC1055L1R0C 数据手册

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TPS51916  
www.ti.com  
SLUSAE1D –DECEMBER 2010–REVISED JUNE 2012  
Complete DDR2, DDR3 and DDR3L Memory Power Solution Synchronous Buck  
Controller, 2-A LDO, Buffered Reference  
1
FEATURES  
DESCRIPTION  
The TPS51916 provides a complete power supply for  
DDR2, DDR3 and DDR3L memory systems in the  
lowest total cost and minimum space. It integrates a  
synchronous buck regulator controller (VDDQ) with a  
2-A sink/source tracking LDO (VTT) and buffered low  
noise reference (VTTREF). The TPS51916 employs  
D-CAP™ mode coupled with 300 kHz/400 kHz  
frequencies for ease-of-use and fast transient  
response or D-CAP2™ mode coupled with higher  
500 kHz/670 kHz frequencies to support ceramic  
output capacitor without an external compensation  
circuit. The VTTREF tracks VDDQ/2 within excellent  
0.8% accuracy. The VTT, which provides 2-A  
sink/source peak current capabilities, requires only  
2
•
Synchronous Buck Controller (VDDQ)  
–
–
–
–
Conversion Voltage Range: 3 V to 28 V  
Output Voltage Range: 0.7 V to 1.8 V  
0.8% VREF Accuracy  
Selectable Control Architecture  
–
D-CAP™ Mode for Fast Transient  
Response  
–
D-CAP2™ Mode for Ceramic Output  
Capacitors  
–
–
Selectable 300 kHz/ 400 kHz/ 500 kHz/  
670 kHz Switching Frequencies  
Optimized Efficiency at Light and Heavy  
Loads with Auto-skip Function  
10-μF of ceramic capacitance. In addition,  
a
dedicated LDO supply input is available.  
–
–
–
Supports Soft-Off in S4/S5 States  
OCL/OVP/UVP/UVLO Protections  
Powergood Output  
The TPS51916 provides rich useful functions as well  
as excellent power supply performance. It supports  
flexible power state control, placing VTT at high-Z in  
S3 and discharging VDDQ, VTT and VTTREF (soft-  
off) in S4/S5 state. Programmable OCL with low-side  
MOSFET RDS(on) sensing, OVP/UVP/UVLO and  
thermal shutdown protections are also available.  
•
2-A LDO(VTT), Buffered Reference(VTTREF)  
–
–
2-A (Peak) Sink and Source Current  
Requires Only 10-μF of Ceramic Output  
Capacitance  
The TPS51916 is available in a 20-pin, 3 mm × 3  
mm, QFN package and is specified for ambient  
temperature from –40°C to 85°C.  
–
Buffered, Low Noise, 10-mA VTTREF  
Output  
VIN  
–
–
0.8% VTTREF, 20-mV VTT Accuracy  
Support High-Z in S3 and Soft-Off in S4/S5  
5VIN  
TPS51916  
•
•
Thermal Shutdown  
PGND  
VBST 15  
12 V5IN  
VDDQ  
20-Pin, 3 mm × 3 mm, QFN Package  
DRVH 14  
S3  
S5  
17 S3  
16 S5  
SW 13  
APPLICATIONS  
PGND  
DRVL 11  
PGND 10  
•
•
DDR2/DDR3/DDR3L Memory Power Supplies  
6
8
7
VREF  
SSTL_18, SSTL_15, SSTL_135 and HSTL  
Termination  
PGOOD 20  
Powergood  
REFIN  
GND  
VDDQSNS  
VLDOIN  
VTT  
9
2
3
1
4
5
VTT  
19 MODE  
18 TRIP  
VTTSNS  
VTTGND  
VTTREF  
VTTREF  
UDG-10193  
AGND PGND  
AGND  
PGND  
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
D-CAP, D-CAP2 are trademarks of Texas Instruments.  
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 © 2010–2012, Texas Instruments Incorporated  
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