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TPS51220

更新时间： 2024-09-29 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
37页 1098K
描述
Fixed Frequency, 99% Duty Cycle Peak Current Mode Notebook System Power Controller

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TPS51220 数据手册

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TPS51220  
www.ti.com  
SLVS785–OCTOBER 2007  
Fixed Frequency, 99% Duty Cycle Peak Current Mode Notebook System Power Controller  
1
FEATURES  
2
•
Input Voltage Range: 4.5V to 28V  
•
•
Powergood Output for Each Channel  
•
•
Output Voltage Range: 1V to 12V  
OCL/OVP/UVP/UVLO Protections  
(OVP Disable Option)  
Selectable Light Load Operation  
(Continuous / Auto Skip / Out-Of-Audio™ Skip)  
•
•
•
•
Thermal Shutdown (Non-Latch)  
Output Discharge Function (Disable Option)  
Integrated Boot Strap MOSFET Switch  
QFN32 (RHB)  
•
•
•
•
•
•
Programmable Droop Compensation  
Voltage Servo Adjustable Soft Start  
200kHz to 1MHz Fixed Frequency PWM  
Selectable Current/D-CAP™ Mode Architecture  
180° Phase Shift Between Channels  
APPLICATIONS  
•
•
Notebook Computer System and I/O Bus  
Point of Load in LCD TV, MFP  
Resistor or Inductor DCR Current Sensing  
DESCRIPTION  
The TPS51220 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  
TPS51220 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. Two types of control schemes can  
be chosen depending on the application. Peak current mode supports stability operation with lower ESR  
capacitor and output accuracy. The D-CAP mode supports fast transient response. The high duty (99%)  
operation and the 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 200kHz to 1MHz by a resistor, and each  
channel runs 180° out of phase. The TPS51220 can also synchronize to the external clock, and the interleaving  
ratio can be adjusted by its duty. The TPS51220 is available in the 32 pin 5x5 QFN package and is specified  
from –40°C to 85°C.  
TYPICAL APPLICATION CIRCUIT  
VREG5  
5V/100mA  
VBAT  
VBAT  
L1  
Q11  
C12  
Q21  
C22  
C01  
L2  
C14  
C24  
PGND  
PGND  
VO2  
3.3 V  
Q12  
VO1  
5.0 V  
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  
TPS51220RHB  
(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  
R21  
GND  
R13  
R11  
R22  
C02  
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...37

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TPS51220 替代型号

型号 品牌 替代类型 描述 数据表
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