描述
本文介绍了LTC3675主要特性,方框图,以及多种典型应用电路。Linear 公司的LTC3675是七路可配置大功率PMIC,包括多个输出的电源和两串LED驱动器。LTC3675集成了四个同步降压DC/DC转换器(1A/1A/500mA/500mA),一个1A升压转换器和一个降压-升压转换器,两个I2C控的40V LED驱动器以及常开的25mA LDO.其中的C可编程输出电压,工作模式和开关节点转换速率,主要用在5-10W大功率单个锂离子/聚合物电池,手提工业应用,手提仪表和终端以及多输出低压电源。
LTC3675主要特性:
Four Monolithic Synchronous Buck DC/DCs (1A/1A/500mA/500mA)
Buck DC/DCs Can Be Paralleled to Deliver Up to 2Current with a Single Inductor
Independent 1A Boost and 1A Buck-Boost DC/DCs
Dual String I2C Controlled 40V LED Driver
I2C Programmable Output Voltage, Operating Mode, and Switch Node Slew Rate for All DC/DCs
I2C Read Back of DC/DC, LED Driver, Fault Status
I2C Programmable VIN and Die Temperature Warnings
Maskable Interrupts to Report DC/DC, VIN and Die Temperature Faults
Pushbutton ON/OFF/RESET
Always-On 25mA LDO
Low Quiescent Current: 16μA (All DC/DCs Off)
4mmx7mmx0.75mm 44-Lead QFN Package
LTC3675应用:
High Power (5W to 10W) Single Cell Li-Ion/Polymer Applications
Portable Industrial Applications, Handy Terminals, Portable Instruments
Multioutput Low Voltage Power Supplies
![功率](https://www.elecfans.com/article/UploadPic/2010-9/2010931624371453.jpg)
图1。LTC3675方框图
图2。LTC3675演示板外形图
![功率](https://www.elecfans.com/article/UploadPic/2010-9/2010931631267530.jpg)
图3。LTC3675应用电路图
![功率](https://www.elecfans.com/article/UploadPic/2010-9/2010931635950606.jpg)
图4。LTC3675降压应用电路图
![功率](https://www.elecfans.com/article/UploadPic/2010-9/2010931623596.gif)
图5。LTC3675降压稳压器和高压升压稳压组合应用电路图
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