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TPS51221

更新时间： 2024-11-23 04:27:31
品牌 Logo 应用领域
德州仪器 - TI 功率控制控制器
页数 文件大小 规格书
36页 958K
描述
Fixed Frequency, 99% Duty Cycle Peak Current Mode Notebook System Power Controller

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TPS51221 数据手册

 浏览型号TPS51221的Datasheet PDF文件第2页浏览型号TPS51221的Datasheet PDF文件第3页浏览型号TPS51221的Datasheet PDF文件第4页浏览型号TPS51221的Datasheet PDF文件第5页浏览型号TPS51221的Datasheet PDF文件第6页浏览型号TPS51221的Datasheet PDF文件第7页 
TPS51221  
www.ti.com  
SLVS786–NOVEMBER 2007  
Fixed Frequency, 99% Duty Cycle Peak Current Mode  
Notebook System Power Controller  
1
FEATURES  
APPLICATIONS  
•
Notebook Computer System and I/O Bus  
2
•
Input Voltage Range: 4.5 V to 28 V  
•
Point of load in LCD TV, MFP  
•
•
Output Voltage Range: 1 V to 12 V  
Selectable Light Load Operation (Continuous /  
Auto Skip / Out-Of-Audio™ Skip)  
DESCRIPTION  
The TPS51221 is a dual synchronous buck regulator  
controller with 2 LDOs. It is optimized for 5V/3.3V  
system controller, enabling designers to cost  
effectively complete 2-cells to 4-cells notebook  
system power supply. The TPS51221 supports high  
efficiency, fast transient response and 99% duty cycle  
operation. It supports supply input voltages ranging  
from 4.5V to 28V, and output voltages from 1V to  
12V. Peak current mode supports stability operation  
with lower ESR capacitor and output accuracy. The  
high duty (99%) operation and wide input/ output  
voltage range supports flexible design for small  
mobile PCs and a wide variety of other applications.  
The fixed frequency can be adjusted from 200 kHz to  
1MHz by a resistor, and each channel runs 180° out  
of phase. The TPS51221 can also synchronize to the  
external clock, and the interleaving ratio can be  
adjusted by its duty. The TPS51221 is available in the  
32 pin 5×5 QFN package and is specified from –40°C  
to 85°C.  
•
•
•
•
•
•
•
•
•
•
•
•
•
Programmable Droop Compensation  
Voltage Servo Adjustable Soft Start  
200 kHz to 1 MHz Fixed Frequency PWM  
Current Mode Architecture  
180° Phase Shift Between Channels  
Resistor or Inductor DCR Current Sensing  
Powergood Output for each channel  
OCL/OVP/UVP/UVLO protections  
Current Monitor Output for CH1  
Thermal Shutdown (Non-latch)  
Output Discharge Function (Disable option)  
Integrated Boot Strap MOSFET Switch  
QFN32 (RTV)  
TYPICAL APPLICATION CIRCUIT  
VREG5  
5V/100mA  
VBAT  
VBAT  
Q11  
C12  
Q21  
C22  
C01  
L2  
C14  
C24  
L1  
PGND  
PGND  
VO2  
3.3V  
Q12  
VO1  
5.0V  
GND  
PGND  
PGND  
C21  
Q22  
C11  
32 31 30 29 28 27 26 25  
PGND  
PGND  
PGND  
PGND  
1
2
3
4
5
6
7
8
24  
DRVH1  
DRVH2  
VO1  
V5SW  
RF  
VIN 23  
VREG3 22  
EN2 21  
VBAT  
R01  
VREG3  
3.3V/10mA  
C03  
GND  
EN1  
EN1  
EN2  
TPS51221RTV  
(QFN32)  
PGOOD1  
PGOOD1  
SKIPSEL1  
PGOOD2 20  
SKIPSEL2 19  
CSP2 18  
PGOOD2  
GND  
SKIPSEL1  
R14  
SKIPSEL2  
R24  
PowerPAD  
CSP1  
CSN1  
C23  
C13  
CSN2  
17  
9
10 11  
12 13 14 15 16  
R23  
GND  
R12  
EN  
VO1  
VREG5  
VO2  
R02  
IMON1  
R21  
C04  
GND  
R11  
R22  
C02  
R13  
GND  
GND  
GND  
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
Out-Of-Audio, D-CAP, PowerPAD 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 © 2007, Texas Instruments Incorporated  
1234567...36

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TPS51221 替代型号

型号 品牌 替代类型 描述 数据表
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