Semtech SC410 3A EcoSpeed降压电源稳压方案

Semtech 公司的SC410是3A EcoSpeed降压电源稳压器,输入电压5.5V-24V,输出电压0.75V到7.5V,输出电流高达3A,内部基准精度1%,主要应用在网络设备,嵌入式系统,医疗设备,办公自动化,仪表和手持系统,消费类电子如TV和STB,POL转换器.本文介绍了SC410主要特性, 方框图,多种典型应用电路图和PCB布局图.

3A EcoSpeed TM Step-Down Regulator with LDO and Ultrasonic Power Save

The SC410 is an integrated, synchronous 3A EcoSpeedTM step-down regulator. It incorporates Semtech’s advanced, patented adaptive on-time architecture to achieve bestin- class dynamic performance using point-of-load applications.

The input voltage range is 5.5V to 24V with a programmable output voltage from 0.75V up to 7.5V. The device features an internal LDO and ultrasonic PSAVE mode for high efficiency across the output load range.

Adaptive on-time control provides programmable pseudo-fixed frequency operation in continuous conduction and excellent transient performance. The switching frequency can be set from 200kHz to 1MHz, allowing the designer to reduce external LC filtering and minimize light load (standby) losses.
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