Schematic # 3 here:
Drop R1 to 680 Ohms.
Still switching on low side.
You want a low Rdson at the Vgs you are using, a reasonable Vgs max. and a current rating > than you need, a Vds max > your supply.
An AO4409 might work if you are switching at 5v.
oops, a NDP6020 is an N channel MOSFET
Thank you very much of the examples you shared.
AO4409 MOSFET. Datasheet pdf. Equivalent
Type Designator: AO4409
Type of Transistor: MOSFET
Type of Control Channel: P -Channel
Maximum Power Dissipation (Pd): 3.1 W
Maximum Drain-Source Voltage |Vds|: 30 V
Maximum Gate-Source Voltage |Vgs|: 20 V
Maximum Gate-Threshold Voltage |Vgs(th)|: 2.7 V
Maximum Drain Current |Id|: 15 A
Maximum Junction Temperature (Tj): 150 °C
Total Gate Charge (Qg): 51.5 nC
Rise Time (tr): 16.5 nS
Drain-Source Capacitance (Cd): 945 pF
Maximum Drain-Source On-State Resistance (Rds): 0.0075 Ohm
Would even work with 3.3 Volt ! thanks a lot for the info!