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TPS51218_16

更新时间： 2024-11-24 02:58:15
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德州仪器 - TI /
页数 文件大小 规格书
27页 1973K
描述
HIGH PERFORMANCE, SINGLE SYNCHRONOUS STEP-DOWN CONTROLLER FOR NOTEBOOK POWER SUPPLY

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TPS51218_16 数据手册

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TPS51218  
www.ti.com ............................................................................................................................................................... SLUS935A–MAY 2009–REVISED JUNE 2009  
HIGH PERFORMANCE, SINGLE SYNCHRONOUS STEP-DOWN  
CONTROLLER FOR NOTEBOOK POWER SUPPLY  
1
FEATURES  
APPLICATIONS  
•
•
•
Notebook Computers  
I/O Supplies  
System Power Supplies  
2
•
Wide Input Voltage Range: 3 V to 28 V  
Output Voltage Range: 0.7 V to 2.6 V  
Wide Output Load Range: 0 to 20A+  
Built-in 0.5% 0.7 V Reference  
•
•
•
•
DESCRIPTION  
D-CAP™ Mode with 100-ns Load Step  
Response  
The TPS51218 is a small-sized single buck controller  
with adaptive on-time D-CAP™ mode. The device is  
suitable for low output voltage, high current, PC  
system power rail and similar point-of-load (POL)  
power supply in digital consumer products. A small  
package with minimal pin-count saves space on the  
PCB, while a dedicated EN pin and pre-set frequency  
selections minimize design effort required for new  
designs. The skip-mode at light load condition, strong  
gate drivers and low-side FET RDS(on) current sensing  
supports low-loss and high efficiency, over a broad  
load range. The conversion input voltage which is the  
high-side FET drain voltage ranges from 3 V to 28 V  
and the output voltage ranges from 0.7 V to 2.6 V.  
The device requires an external 5-V supply. The  
TPS51218 is available in a 10-pin SON package  
specified from –40°C to 85°C.  
•
Adaptive On Time Control Architecture With 4  
Selectable Frequency Setting  
•
•
•
•
•
•
•
•
•
4700 ppm/°C RDS(on) Current Sensing  
Internal 1-ms Voltage Servo Softstart  
Pre-Charged Start-up Capability  
Built in Output Discharge  
Power Good Output  
Integrated Boost Switch  
Built-in OVP/UVP/OCP  
Thermal Shutdown (Non-latch)  
SON-10 (DSC) Package  
TYPICAL APPLICATION CIRCUIT  
V
IN  
V5IN  
TPS51218  
PGOOD VBST 10  
1
2
3
4
5
TRIP  
EN  
DRVH  
SW  
9
8
7
6
V
OUT  
EN  
VFB  
RF  
V5IN  
DRVL  
GND  
V
_GND  
OUT  
UDG-09064  
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 is a trademark 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 © 2009, Texas Instruments Incorporated  
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