Linear LTC7103 105V 2.3A低EMI降压稳压器解决方案

Linear公司的LTC7103是采采用恒频平均电流模式控制架构的高效单片同步降压DC/DC转换器,输入电压从4.4V到105V,可调输出电压从1V到VIN,输出电流高达2.3A.具有超低EMI/EMC,CISPR 25兼容,100%最大占空比工作,可编固定频率200kHz-2MHz.主要用在电池充电器和CC/CV电源,汽车和军用系统,工业,航空和重型设备以及医疗设备和通信系统.本文介绍了LTC7103主要特性,框图和多种应用电路,以及演示板DC2317A,电路图和材料清单.
The LTCR7103 is a high efficiency, monolithic synchronousstep-down DC/DC converter utilizing a constant frequency,average current mode control architecture. It operates from an input voltage range of 4.4V to 105V and provides anadjustable regulated output voltage from 1V to VIN whiledelivering up to 2.3A of output current.
The LTC7103 features high frequency operation anda low minimum on-time that reduce inductor size andenable constant-frequency operation even at very highstep-down ratios. In addition, the LTC7103 achieves thelowest possible dropout voltage with 100% maximumduty cycle operation. During light load operation, converterefficiency and output ripple can be optimized by selectingBurst Mode or pulse-skipping operation.
The LTC7103 includes accurate, high speed average currentprogramming and monitoring without the need foran external sense resistor. Additional features include a bypass LDO to maximize efficiency, fixed or adjustableoutput voltage and loop compensation, and a wide arrayof protection features to enhance reliability.
LTC7103主要特性:
Wide VIN Range: 4.4V to 105V (110V Abs Max)
Ultralow EMI/EMC Emissions: CISPR 25 Compliant
2μA IQ When Regulating 48VIN to 3.3VOUT
Fast and Accurate Output Current Programming andMonitoring with No External RSENSE
Brick Wall Current Limit
Low Minimum On-Time: 40ns
Wide VOUT Range: 1V to VIN
100% Maximum Duty Cycle Operation
Programmable Fixed Frequency: 200kHz to 2MHz
Eight, Pin-Selectable Fixed (1.2V to 15V) orAdjustable Output Voltages
Selectable Pulse-Skipping or Low Rippl...