Free Simple Circuit Diagram
The circuit on the following figure is not for power supply management, but serves to prevent lock-up in processor based systems. If the system misses an instruction due to transient hardware or software events, this could be occur. A predictable cessation of pulse events somewhere in the system is caused by such a processor hang-up. This circuit issues a reset […]
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Sometimes, the regulator does not work well so the regulator generate overvoltage that will destroy the system. To prevent system damage, a overvoltage protection circuit should be used. The overvoltage occurred when the regulator connects the raw DC supply to the 5V rail. This failure can be occurred due to the feedback loop opens up or the pass transistor shorts. […]
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Sometimes the power goes down and we unable to save memory content. When the power goer down, the memory save circuit can be used to save memory content. This is a very useful circuit because the AC line dropout detection is not worthy. The difference of dropout voltage from two regulators is a basic of this circuit. This circuit uses […]
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After supply turn-on, another power related requirement involves generating a system reset pulse. The 5V rail comes up when supply power is applied to figure below. The LT1004 clamps at 1.2V and C1A’s positive input (Trace B) ramps at a time constant determined by the 0.5% resistors and the 0.1 uF capacitor. The output goes high when C1A’s positive input […]
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