[原创] ST STLQ02 200A超低静态电流LDO解决方案

ST公司的STLQ02是200A超低静态电流低压降(LDO)稳压器,输入电压2V-5.5V,输出电压0.8 V - 4.5 V,可调每步为50mV,最大负载的压降是160mV,无负载时的静态电流为0.3uA,工作温度-40℃ 到+125℃,主要用在智能手机/平板电脑,图像传感器,可穿戴附件,健康设备,和仪表.本文介绍了STLQ02主要特性,固定频率和可调频率框图,应用电路,以及基于LDBL20, LDLN025, LD39130S和STLQ020的四路高性能LDO评估板STEVAL-LDO001V1主要特性,电路图和材料清单.

The STLQ020 is a 200 mA low-dropout voltage regulator, able to work with an input voltage ranging from 2 V to 5.5 V. The typical dropout voltage at maximum load is 160 mV. The ultra-low quiescent current, which is just 0.3 μA at no load on the adjustable version, extends battery-life of applications requiring very long standby time.

Even though the device intrinsic consumption is ultra-low, STLQ020 is able to provide fast transient response and good PSRR performance, thanks to its adaptive biasing circuit.  Enable pin puts the STLQ020 in shutdown mode, reducing total current consumption to 1 nA.

The STLQ020 is designed to keep the quiescent current under control and at a low value also during dropout operation, helping to extend even more the operating time of battery- powered devices.
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