does this exist? I need the fet to act as a very open switch when
off so a very sensitive circuit breaker does not trip. The
circuit breaker remains tripped unless it sees less than 30na to
the load.
You could use a second switch to help any leakage prob.
1. P-FET upstream of the current limiter.
____________ _____________
| | | |
13Vdc -----|Series P-FET|----+---|Current Limit|--->Load
|____________| | |_____________|
______|_____
| |
|Shunt Switch|
|____________|
|
0v----------------------------+--------------------->
2. P-FET downstream of the current limiter.
_____________ ____________
| | | |
13Vdc--+--|Current Limit|----+---|Series P-FET|--->Load
| |_____________| | |____________|
| _______________ |
| | | |
+--|Shorting Switch|--'
|_______________|
0v------------------------------------------------>