Maxim MAX77839 5.5V 4.4A静态电流6μA升－降转换器解决方案
Maxim公司的MAX77839是高效率降压/升压稳压器,具有工业一流的6μA静态电流,目标用于单颗锂电池和低到1.8V放电电压的任何化学电池.器件支持输入电压1.8V到5.5V,输出电压2.3V到5.3V.MAX77839提供两种不同开关电流限制,以优化基于负载电流要求的外接元件尺寸.器件具有单个电阻可调整输出电压从2.3V到5.3V.可配置的GPIO引脚喀选择FPWM模式控制输入或POK漏极输出,这取决于系统的要求.Maxim公司的独特降压/升压控制器技术提供了高效率,极好的负载和线路瞬态响应,以及在降压和升压模式间无缝转换.器件的峰值效率96%(VIN = 3.6V, VOUT = 3.3V).开关频率2.2MHz.主要用在资产跟踪/舰艇管理,5G/2G/GSM蜂窝电源,RF放大器,智能手机ToF/面部和手势识别,系统电源预调整和单颗锂电池供电设备.本文介绍了MAX77839主要优势和特性,功能框图,应用电路以及评估板MAX77839 EVK主要优势和特性,主要指标,电路图,材料清单和PCB设计图.
The MAX77839 is a highly-efficient buck-boost regulatorwith an industry leading quiescent current of 6μA targetedfor one-cell Li-ion and down to any battery chemistry with1.8V discharge voltage. It supports input voltages of 1.8Vto 5.5V and an output voltage range of 2.3V to 5.3V. TheIC provides two different switching current limits to optimizeexternal component sizing based on given load currentrequirements. The MAX77839 supports two differentswitching current options ("A" and "B" = 4.4A (typ), "C"
and "D" = 3.6A (typ)), and two different GPIO pin configurations("A" and "C" = FPWM pin,"B" and "D" = POK pin).
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