[原创] Maxim MAX17559 60V双输出降压电源解决方案

Maxim公司的MAX17559是驱动nMOSFET的60V双输出降压控制器,采用恒频峰值电流模式架构,两个输出可单独配置,并可使输出有180°相位.输入电压4.5V-60V,输出电压0.8V-24V,采用RSENSE 或电感DCR电流检测,主要用在工业电源,分布是DC电源,马达控制和可编逻辑控制器和计算机化数字控制.本文介绍了MAX17559主要优势和特性,框图,几种应用电路以及MAX17559 EV优势和特性,电路图,材料清单和PCB设计图.

The MAX17559 is a dual-output, synchronous step-down controller that drives nMOSFETs. The device uses a constant-frequency, peak-current-mode architecture.

The two outputs can be configured as independent voltage rails. Input capacitor size is minimized by running the two outputs 180° out-of-phase.

The IC supports current sensing using either an external current-sense resistor for accuracy or an inductor DCR for improved system efficiency. Current foldback or latchoff limits MOSFET power dissipation under short-circuit conditions.

The IC provides independent adjustable soft-start/stop for each output and can start up monotonically into a prebiased output. The IC can be configured in either PWM or DCM modes of operation, depending on whether constant-frequency operation or light-load efficiency is desired.
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