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XPS628303ADRLR PDF预览

XPS628303ADRLR

更新时间: 2023-09-03 20:32:56
品牌 Logo 应用领域
德州仪器 - TI 转换器
页数 文件大小 规格书
37页 3350K
描述
采用小型 QFN 和 SOT583 封装、精度为 1% 的 2.25V 至 5.5V、3A 降压转换器 | DRL | 8 | -40 to 125

XPS628303ADRLR 数据手册

 浏览型号XPS628303ADRLR的Datasheet PDF文件第4页浏览型号XPS628303ADRLR的Datasheet PDF文件第5页浏览型号XPS628303ADRLR的Datasheet PDF文件第6页浏览型号XPS628303ADRLR的Datasheet PDF文件第8页浏览型号XPS628303ADRLR的Datasheet PDF文件第9页浏览型号XPS628303ADRLR的Datasheet PDF文件第10页 
TPS628303  
ZHCSNO6 FEBRUARY 2023  
www.ti.com.cn  
8 Detailed Description  
8.1 Overview  
The TPS628303 is a family of synchronous step-down converters with DCS-Control topology with an adaptive  
constant on-time control and a stabilized switching frequency. The DCS-Control topology allows for a continuous  
conduction mode (CCM) operation with PWM (pulse width modulation) mode and discontinuous conduction  
mode (DCM) operation with PFM mode (pulse frequency modulation also known as power save mode (PSM)).  
The control block for both operation modes is the same, allowing for a seamless transition between both modes  
without an impact on the output voltage ripple. The MODE pin allows for an easy selection for the mode of  
operation. If PSM is selected, the converter operates in DCM at light load conditions with a reduced switching  
frequency to maintain a high efficiency, and seamlessly transition to CCM as the load current increases to  
medium or heavy ranges. If forced-PWM is selected, the converter maintains a CCM operation regardless of the  
load current to maintain a minimum output voltage ripple. The nominal switching frequency is 2 MHz with a  
controlled variation over the input voltage range. The family offers a 1% output voltage accuracy over 40 °C to  
+125 °C, a fast load transient regulation, an excellent EMI performance, and low output voltage ripple.  
8.2 Functional Block Diagram  
EN  
PG  
Control Logic  
MODE  
VFB,INT  
VREF  
Thermal  
Shutdown  
Soft-Start  
UVLO  
VOS  
VIN  
VIN  
VSW  
Ramp  
Cff  
VFB,INT  
R1*  
R2*  
Peak Current Detect  
FB  
EA  
VREF  
HICCUP / Latch-off  
Comp  
VSW  
Modulator  
SW  
Gate Drive  
Ton  
Output  
Discharge  
VIN  
VSW  
Zero Current Detect  
0.5 V  
Or  
Fixed Output Voltages  
VREF  
GND  
* R1 and R2 are implemented internally (dashed lines) for fixed output voltage versions only  
Copyright © 2023 Texas Instruments Incorporated  
Submit Document Feedback  
7
Product Folder Links: TPS628303  
 
 
 

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