Editing Reverse Protection Diodes

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Dropping 0.7V is wasteful, and it becomes more significant the lower the power supply. If the design will operate on batteries, then dropping 0.7V might not even allow the circuit to work. What do you do in this case? There are two options:  
 
Dropping 0.7V is wasteful, and it becomes more significant the lower the power supply. If the design will operate on batteries, then dropping 0.7V might not even allow the circuit to work. What do you do in this case? There are two options:  
  
1. Use Schottky diodes instead of standard ones. A Schottky will only drop around 0.3V and there are some than can drop even less voltage than that. Cheap, simple!<br>
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1. Use Schottky diodes instead of standard ones. A Schottky will only drop around 0.3V and there are some than can drop even less voltage than that. Cheap, simple!:</b>
2. When even 0.3V won't do it, then use a transistor! Use a P-mosfet and control the base using either discrete components or an LTC4412 for only 20mV of voltage drop. The pitfall with this is the added power consumption of the LTC4412 and the cost, but for most cases the 28uA are insignificant.:<br>
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2. When even 0.3V won't do it, then use a transistor! Use a P-mosfet and control the base using either discrete components or an LTC4412 for only 20mV of voltage drop. The pitfall with this is the added power consumption of the LTC4412 and the cost, but for most cases the 28uA are insignificant.:</b>
  
 
<b>Documents:</b><br>
 
<b>Documents:</b><br>

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