600Khz固定开关频率CXSU63039高效同步升压调节器集成了5A功率MOSFET可调输出电压从3V到5.5V输出过压保护

目录

1.产品概述                       2.产品特点
3.应用范围                       4.下载产品资料PDF文档 
5.产品封装图                     6.电路原理图                   
7.功能概述                        8.相关产品

一,产品概述(General Description)         
   CXSU63039 is a high efficiency synchronous boost regulator that converts

down to 2.5V input and up to 5.5V output voltage. It adopts NMOS for the

main switch and PMOS for the synchronous switch. It can disconnect the 

output from input during the shutdown mode..

  It integrates 5A power MOSFET and can output 5V 2.5A with Li-Battery input.
二.产品特点(Features)
1.)2.5V Minimum input voltage
2.)Adjustable output voltage from 3V to 5.5V
3.)6A peak current limit
4.)Input under voltage lockout
5.)600Khz fixed Switching Frequency
6.)Load disconnect during shutdown
7.)Integrated soft-start
8.)Output over voltage protection
30moJTM Power MOSFET
Thermal Shutdown
QFN4x4-16 Package
三,应用范围 (Applications)
1.) Handheld Devices
2.)Power Bank
3.)All Single Cell Li or Dual Cell Battery Operated Products
四,产品封装图 (Package)

五,电路原理图



六.产品PDF文档

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七,功能概述

SYNCHRONOUS RECTIFIER
The device integrates an N-channel and a P-channel MOSFET transistor to realize a
synchronous rectifier. Because the commonly used discrete Schottky rectifier is replaced with
a low RDS(ON) PMOS switch, the power conversion efficiency reaches 96%. To avoid
ground shift due to the high currents in the NMOS switch, two separate ground pins are used.
The reference for all control functions is the GND pin. The source of the NMOS switch is
connected to PGND. Both grounds must be connected on the PCB at only one point close to
the GND pin. A special circuit is applied to disconnect the load from the input during
shutdown of the converter. In conventional synchronous rectifier circuits, the backgate diode
of the high-side PMOS is forward biased in shutdown and allows current flowing from the
battery to the output. This device however uses a special circuit which takes the cathode of
the backgate diode of the high-side PMOS and disconnects it from the source when the
regulator is not enabled (EN = low).
The benefit of this feature for the system design engineer is that the battery is not depleted
during shutdown of the converter. No additional components have to be added to the design
to make sure that the battery is disconnected from the output of the converter.
八,相关产品           更多同类产品........