http://uphotos.eepw.com.cn/soothmusic/pics/5a9c5e81d76414aa6cd8115f176a1ffb.jpg

摘要：以下应用笔记演示了一个简单的使用电荷泵和一个微处理器监控电路断开负载低的电源电压。该电路采用P沟道MOSFET断开负载从一个1.5V电源。

Maxim/Dallas > App Notes > BATTERY MANAGEMENT POWER-SUPPLY CIRCUITS

Keywords: low voltage, battery disconnect, load disconnect, dc-dc converter, over voltage, dc to dc converters, Jul 21, 2003
overvoltage, voltage monitor, microprocessor supervisor

APPLICATION NOTE 2237
Simple Circuit Disconnects Load from Low-Voltage Supply

The following application note demonstrates a simple circuit using a charge pump and a microprocessor
supervisor to disconnect a low voltage supply from a load. The circuit uses a P-channel MOSFET to disconnect
the load from a 1.5V supply.


Power supplies often include a circuit that disconnects the load when the supply voltage drops too low (when a
battery is nearly discharged, for example). A p-channel MOSFET connected between supply and load is the
ty