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TPS51020

更新时间： 2024-01-03 21:31:34
品牌 Logo 应用领域
德州仪器 - TI 双倍数据速率控制器
页数 文件大小 规格书
27页 555K
描述
DUAL, VOLTAGE MODE, DDR SELECTABLE, SYNCHRONOUS, STEP-DOWN CONTROLLER FOR NOTEBOOK SYSTEM POWER

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TPS51020 数据手册

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SLUS564B − JULY 2003 − REVISED DECEMBER 2003  
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FEATURES  
DESCRIPTION  
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Wide Input Voltage Range: 4.5-V to 28-V  
Selectable Dual and DDR Modes  
The TPS51020 is  
a
multi-function dual-  
synchronous step-down controller for notebook  
system power. The part is specifically designed  
for high performance, high efficiency applications  
where the loss associated with a current sense  
resistor is unacceptable. The TPS51020 utilizes  
feed forward voltage mode control to attain high  
efficiency without sacrificing line response.  
Efficiency at light load conditions can be  
maintained high as well by incorporating autoskip  
operation. A selectable, Suspend to RAM (STR)  
supported, DDR option provides a one chip  
solution for all switching applications from  
5-V/3.3-V supply to a complete DDR termination  
solution.  
Selectable Fixed Frequency Voltage Mode  
Integrated Selectable Output Discharge  
Advanced Power Good Logic Monitors both  
Channels  
Selectable Autoskip Mode  
Integrated Boot Strap Diodes  
180° Phase Shift Between Channels  
Integrated 5-V, 60-mA Regulator  
Input Feedforward Control  
1% Internal 0.85-V Reference  
R
Overcurrent Detection (4200 ppm/°C)  
DS(on)  
Integrated OVP, UVP and Power Good Timers  
30-pin TSSOP Package  
ORDERING INFORMATION  
TA  
PLASTIC TSSOP (DBT)  
TPS51020DBT  
−40°C to 85°C  
TPS51020DBTR (T&R)  
APPLICATIONS  
D
Notebook Computers System Bus and I/O  
D
DDR I or DDR II Termination  
VIN  
TPS51020  
VO1  
1
2
30  
29  
28  
27  
SIMPLIFIED  
APPLICATION  
DIAGRAM  
INV1  
VBST1  
OUT1_U  
LL1  
VO1  
COMP1  
3
4
5
6
7
SSTRT1  
SKIP  
OUT1_D  
OUTGND1  
TRIP1  
26  
VO1  
VO1_VDDQ  
DDR  
VIN  
25  
24  
23  
22  
21  
VIN  
GND  
VIN  
TRIP2  
8
9
REF_X  
ENBL1  
VREG5  
VREG5  
REG5_IN  
OUTGND2  
OUT2_D  
LL2  
10  
11  
12  
13  
14  
15  
ENBL2  
VO2  
EXT_5V  
20  
19  
18  
17  
16  
VO2  
VREG5  
PGOOD  
SSTRT2  
COMP2  
INV2  
OUT2_U  
VBST2  
VO2  
VO2  
UDG−03144  
VIN  
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.  
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Copyright 2003, Texas Instruments Incorporated  
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ꢤ ꢨ ꢥ ꢤꢝ ꢞꢲ ꢠꢟ ꢣ ꢫꢫ ꢩꢣ ꢡ ꢣ ꢢ ꢨ ꢤ ꢨ ꢡ ꢥ ꢭ  
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