IRLML2502 N-channel MOSFET connection guide
IRLML2502 N-channel MOSFET Micro3 (SOT-23) wiring guide with power, signal assignments, and bench checks.
Micro3 (SOT-23)
3 contacts Current packageCheck that the switch is off
RequiredUse a current-limited 5 V supply and a 1 kΩ resistive load. Pull the gate down to its source through 10 kΩ.
- 5 V
- Current-limited 5 V supply
- RL.1
- Switched node
- D (3)
- RL.2
- Meter positive
- Return
- S (2)
- Supply return
- Gate supply return
- RPD.2
- Meter common
- Gate
- G (1)
- RPD.1
Bench checks
- VGS should be approximately 0 V, and the switched node should sit near 5 V.
Infineon IRLML2502PbF, terminal diagram and electrical characteristics. The resistors are fixture choices.
Connection scenarios
Switch on a small resistive load
Use a 0/5 V gate drive through 100 Ω. Keep the 10 kΩ pull-down in place to define the state when the gate driver is disconnected.
- 5 V
- Current-limited 5 V supply
- RL.1
- Switched node
- D (3)
- RL.2
- Meter positive
- Return
- S (2)
- Supply return
- Gate supply return
- RPD.2
- Meter common
- Gate
- G (1)
- RPD.1
- RG.2
- Drive
- Gate-driver output
- RG.1
Bench checks
- With the gate near 5 V relative to source, the switched node should fall close to ground and the load current should be about 5 mA.
- The threshold voltage describes the onset of conduction. Use the specified on-resistance at the actual gate drive to estimate load losses.
Infineon IRLML2502PbF, electrical characteristics. Supply, gate drive and resistors are fixture choices.
Micro3 (SOT-23) wiring map
Micro3 (SOT-23)
2 · S
Source. It sets the gate-voltage reference and is the intrinsic diode anode.
Models and documents
Three-terminal Micro3. Drain is the single lead opposite the gate and source.
- IRLML2502TRPBF
- Infineon tape-and-reel order code.
- Infineon IRLML2502PbF· Pin assignment, absolute maximum ratings, static characteristics and package outline.
- Source register· Document revisions, applicable order codes, consulted sections and available file checksums.