1、Linear LTC3880 双输出多相降压电源解决方案关键词： 电源管理, DC/DC 转换器Linear 公司的 LTC3880/LTC3880-1 是双输出多相 DC/DC 同步降压开关电源控制器,集成了基于 I2C 的 PMBus 兼容的串行接口, 采用恒定频率电流模式架构.VIN 输出电压从 4.5V 到 24V,输出电压 VOUT 从 0.5V 到 5.5V,输出电压对温度的变化为0.5%. 器件集成了 15 位 ADC,主要用在大电流分布电源系统, 通信,数据通信和存储器系统以及智能能效的电源系统.本文介绍了 LTC3880/LTC3880-1 主要特性,方框图 , 三相工作负载
2、共享连接图, 电感 DCR 和电阻电流检测电路图,以及多种应用电路图.Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System ManagementThe LTC3880/LTC3880-1 are dual, PolyPhase DC/DC synchronous step-down switching regulator controllers with an I2C-based PMBus compliant serial interface. The controllers use a cons
3、tant frequency, current mode architecture.Switching frequency, output voltage, and device address can be programmed using external configuration resistors.Additionally, parameters can be set via the digital interface or stored in EEPROM. Voltage, current, internal/external temperature and fault stat
4、us can be read back through the bus interface.The LTC3880/LTC3880-1 can be configured for Burst Mode operation, discontinuous (pulse-skipping) mode or continuous inductor current mode. The LTC3880 incorporates a 5V linear regulator while the LTC3880-1 uses an external 5V supply for minimum power los
5、s. The LTC3880/LTC3880-1 are available in a 40-pin 6mmx 6mm QFN package.LTC3880/LTC3880-1 主要特性 :PMBus/I2C Compliant Serial Interface Query Voltage, Currents, Temperature and Faults Programmable Voltage, Current Limit, Digital Soft-Start/Stop, Sequencing, Margining, OV/UV and Frequency Synchronizatio
6、n (250kHz to 1MHz)0.5% Output Voltage Accuracy over TemperatureIntegrated 15-Bit ADCOptional Resistor Programmable ParametersInternal EEPROM and Fault LoggingIntegrated Powerful N-Channel MOSFET Gate Drivers Power ConversionWide VIN Range: 4.5V to 24VVOUT Range: 0.5V to 5.5VAnalog Current Mode Contr
7、ol LoopSupports Power-Up Into Pre-Biased LoadAccurate PolyPhase Current Sharing for Up to 6 PhasesAvailable in a 40-Pin (6mmx6mm) QFN PackageLTC3880/LTC3880-1 应用 :High Current Distributed Power SystemsTelecom, Datacom and Storage SystemsIntelligent Energy Efficient Power Regulation图 1.LTC3880/LTC388
8、0-1 方框图图 2.LTC3880/LTC3880-1 三相工作负载共享连接图图 3.LTC3880/LTC3880-1 电感 DCR 电流检测电路图图 4.LTC3880/LTC3880-1 电阻电流检测电路图图 5.LTC3880/LTC3880-1 推荐 PCB 布局图图 6.LTC3880 高效双路 500kHz 3.3V/1.8V 降压转换器电路图图 7.LTC3880 LTC 控制器连接图图 8.LTC3880 高效双路 425kHz 2.5V/1.8V 降压转换器电路图图 9.LTC3880 高效双路带检测电阻的 500kHz 5V/3.3V 降压转换器电路图图 10.LTC3880 高效 350kHz 双相 1.5V 降压转换器电路图图 11.LTC3880 高效 450kHz 1.0V 降压双相转换器电路图AO-Electronics 傲壹电子 官网： 中文网：图 12.LTC3880 高效三相 450kHz 2.5V 单个 1.8V 降压转换器电路图图 13.LTC3880 高效四相 425kHz 1.0V 降压转换器电路图
