negative-voltage power-side switch


Posted on Aug 29, 2012

When you need to quickly connect a negative power supply under logic control, the negative power-side switch in Figure 1 can help. Although originally intended for driving the gates of high-current MOSFETs, the MIC4451 can assume a different role. It provides complementary, low-on-resistance MOSFET switches to connect a system power-supply rail to a negative input voltage or to ground, enabled by a digital signal.



The MIC4451 comprises an input buffer with a small amount of hysteresis and several logic inverter/buffers that ultimately drive a high-current output stage. Figure 2 shows a block diagram of the MIC4451. The on-resistance of the n- and p-channel devices




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

6 Channel Disco Running Lights
Tubes Headphone Amplifier
5V Supply High-Side Switcher
2Meter Converter
Fireflies based on tiny AVR
embedded webserver.
bell circuit
10A High power led driver circuit design using LM3434
Triple Stroboscope
lcd interfacing with cy8c3866 psoc 3



Top