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TPS51219 PDF预览

TPS51219

更新时间: 2024-11-23 12:21:59
品牌 Logo 应用领域
德州仪器 - TI 控制器
页数 文件大小 规格书
36页 945K
描述
High Performance, Single-Synchronous Step-Down Controller with Differential Voltage Feedback

TPS51219 数据手册

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TPS51219  
www.ti.com  
SLUSAG1B MARCH 2011REVISED OCTOBER 2011  
High Performance, Single-Synchronous Step-Down Controller  
with Differential Voltage Feedback  
1
FEATURES  
DESCRIPTION  
The TPS51219 is a small-sized single buck controller  
23  
Differential Voltage Feedback  
with adaptive on-time control. It provides a choice of  
control modes (D-CAPor D-CAP2) to meet a  
wide range of system requirements. It is designed for  
tight DC regulation requirements such as the VCCIO  
application for Intel® notebooks. The performance  
and flexibility of the TPS51219 makes it suitable for  
low output voltage, high current, PC system power  
rails and similar point-of-load (POL) power supplies.  
Differential voltage feedback and the voltage  
compensation function combine to provide high  
precision power to load devices.  
DC Compensation for Accurate Regulation  
Wide Input Voltage Range: 3 V to 28 V  
Output Voltage Range: 0.5 V to 2.0 V with  
Fixed Options of 1.05 V and 1.00 V  
Wide Output Load Range: 0 A to 20 A+  
Adaptive On-Time Modulation with Selectable  
Control Architecture and Frequency  
D-CAPMode at 300 kHz/400 kHz for Fast  
Transient Response  
A small package, fixed voltage options and minimal  
external component count saves cost and space,  
while a dedicated EN pin and pre-set frequency  
selections minimize design effort. The skip-mode at  
light load condition, strong gate drivers, and low-side  
FET RDS(on) current sensing provides high efficiency  
operation over a broad load range. The external  
resistor current sense option enables accurate  
current sensing. The conversion input voltage (the  
high-side FET drain voltage) ranges from 3 V to 28 V  
and output voltage ranges from 0.5 V to 2.0 V. The  
device requires an external 5-V supply.  
D-CAP2Mode at 500 kHz/670 kHz for  
Ceramic Output Capacitor  
4700 ppm/°C, Low-Side RDS(on) Current Sensing  
RSENSE Accurate Current Sense Option  
Internal, 1-ms Voltage Servo Softstart  
Built-In Output Discharge  
Power Good Output  
Integrated Boost Switch  
Built-In OVP/UVP/OCP  
Thermal Shutdown (Non-latched)  
3 mm × 3 mm, 16-Pin, QFN (RTE) Package  
The TPS51219 is available in a 16-pin, QFN package  
and is specified for ambient temperature from -40°C  
to 85°C.  
APPLICATIONS  
Notebook Computers  
I/O Supplies  
VIN  
V5IN  
PGOOD  
EN  
16  
15  
14  
13  
SW 12  
1
2
VREF  
DH 11  
REFIN  
VOUT  
TPS51219RTE  
V5  
9
GSNS  
VSNS  
3
4
GSNS  
VSNS  
DL 10  
5
6
7
8
UDG-11006  
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
3
D-CAP, D-CAP2 are trademarks of Texas Instruments.  
Intel is a registered trademark of Intel.  
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 © 2011, Texas Instruments Incorporated  

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