本文介绍了intersil公司开发研制的ISL80121-5芯片，以及其在低功率手持设备方案解决中发挥的作用。1A Ultra Low Dropout Linear Regulator with Programmable Current Limiting ISL80121-5 Features The ISL80121-5 is a low dropout voltage, single output LDO with ±1.8% VOUT Accuracy Guaranteed Over Line, Load and programmable current limiting. This LDO operates from input TJ = -40°C to +125°C voltages of 2.2V to 6V. The ISL80121-5 has a nominal output Very Low 130mV Dropout Voltage at VIN = 5.0V voltage of 5V. Other custom voltage options are available upon request. High Accuracy Current Limit Programmable up to 1.75A ……