原标题：IR iP1837高效全集成DC电源解决方案

　　IR 公司的iP1837 iPOWIRTM是容易使用的高效全集成DC/DC电源稳压器,集成的PWM控制器和MOSFET使iP1837成为节省面积和高效的解决方案. 开关频率从250kHz到1.5MHz可编程,输入电压1.5V-16V,输出电压0.6V到0.75xVIN,基准电压精度0.5%,可编软起动,主要用在服务器,网络设备,嵌入式通信设备和分布式PLO电源架构.本文介绍了iP1837主要特性, 简化方框图, 基本应用电路图以及多种典型应用电路, iP1837参考设计板主要特性,电路图和材料清单(BOM).

　　The iP1837 iPOWIRTM is an easy‐to‐use, fully integrated and highly efficient DC/DC regulator. The onboard PWM controller and MOSFETs make iP1837 a space‐efficient

　　solution, providing accurate power delivery for low output voltage and high current applications.

　　iP1837 is a versatile regulator which offers programmability of switching frequency and current limit while operating in wide input and output voltage range.

　　The switching frequency is programmable from 250kHz to 1.5MHz for an optimum solution.

　　It also features important protection functions, such as Pre‐Bias startup, hiccup current limit and thermal shutdown to give required system level security in the event of fault conditions.

　　iP1837主要特性:

　　Wide input application 1.5V―16V

　　Single 3.3V or single 5V application

　　Output Voltage Range: 0.6V to 0.75*Vin

　　0.5% accurate Reference Voltage

　　Programmable Switching Frequency up to 1.5MHz

　　Programmable Soft‐Start

　　Enable input with Voltage Monitoring Capability

　　Remote Sense Amplifier with True Converter Voltage Sensing

　　Thermally compensated Hiccup Mode Over Current Protection

　　Over‐voltage protection

　　Pre‐Bias Start up

　　Body Braking to improve transient

　　Integrated MOSFET drivers and Bootstrap diode

　　Operating temp:‐40oC

　　Thermal Shut Down

　　Power Good Output with Window Comparator

　　Small Size 7.7mmx7.7mm LGA

　　Pb‐Free (RoHS Compliant)

　　iP1837应用:

　　Server Application

　　Netcom Applications

　　Embedded Telecom Systems

　　Distributed Point of Load Power Architectures

　　图1.iP1837简化方框图

　　图2.iP1837基本应用电路图

　　图3.iP1837应用电路图(1):POL转换器: 12V -1.8V, 35A

　　图4.iP1837应用电路图(2):外接PVCC=5V

　　图5.iP1837应用电路图(3):单5V

　　图6.iP1837应用电路图(3):单3.3V

　　iP1837参考设计板

　　Reference Design kit for the iP1837 a 600kHz, 20A SupIRBuck Synchronous Buck Converter

　　iP1837参考设计板主要特性:

　　• Vin = +12V (+ 13.2V Max)

　　• Vcc=+3.3V (3.46V Max)

　　• Vout = +1.8V @ 0-35A

　　• Fs=600kHz

　　• L= 0.215uH

　　• Cin= 7x22uF (ceramic 1206) + 1X330uF (electrolytic)

　　• Cout=15x22uF (ceramic 0805)

　　图7.iP1837参考设计板外形图

　　iP1837评估板材料清单(BOM):