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TLV61220:输入电压兼容3-5V范围,输出电压4.6V,输出电流1-10mA,出现输入短路故障,故障率约5%

Other Parts Discussed in Thread: TLV61220, TPS61220, TPS61099

电源电路的功能:产品的电源输入电压范围3-5V,需要转换为4.6V的电压,给电池充电或者给超级电容充电,目前采用TLV61220,出现输入短路故障,即SW和GND之间短路, 故障率约5%。选择TLV61220是否合适,或者换成那款芯片更合适?
(1)因为输入电压最低可能为3V,所以选择升压芯片
(2)当输入电压为4.6V以上时,要求电源能够正常输出,输出电压可以高于4.6V

(3)在3V输入时的效率有要求,1.5mA低电流负载时,效率最好在80%以上