Intersil ISL911x高度集成1.2A升降压电源解决方案
Intersil公司的ISL9110和ISL9112是高度集成升降压开关稳压电源,输入电压可高于或低于输出电压,并可在降压和升压模式无缝转换,输入电压1.8V-5.5V,输出电流1.2A,效率高达95%,静态电流35uA,开关频率2.5MHz,I2C接口,主要应用在单个锂电池的3.3V稳压器,智能手机和平板电脑,手持设备和POL稳压器.本文介绍了ISL9110和ISL9112主要特性, 方框图,几种典型应用电路图,以及ISL9110IRTNZ/IRT7Z/IRTAZ-EVAL1Z评估板主要特性,电路图和相应的材料清单与PCB元件布局图.
The ISL9110 and ISL9112 are highly-integrated Buck-Boost switching regulators that accept input voltages either above or below the regulated output voltage. Unlike other Buck-Boost regulators, these regulators automatically transition between operating modes without significant output disturbance.
Both parts are capable of delivering up to 1.2A output current, and provide excellent efficiency due to their fully synchronous 4-switch architecture. No-load quiescent current of only 35μA also optimizes efficiency under light-load conditions. Forced PWM and/or synchronization to an external clock may also be selected for noise sensitive applications.
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