Key Specs
| Spec | Value | Condition | Source |
|---|---|---|---|
| Channel Type | Single | Digi-Key | |
| Current Peak Output Source Sink | 500mA, 500mA | Digi-Key | |
| Digikey Programmable | Not Verified | Digi-Key | |
| Driven Configuration | Low-Side | Digi-Key | |
| Gate Type | IGBT, MOSFET (N-Channel, P-Channel) | Digi-Key | |
| Input Type | Non-Inverting | Digi-Key | |
| Logic Voltage Vil Vih | 0.8V, 2.4V | Digi-Key | |
| Mounting Type | Surface Mount | Digi-Key | |
| Number Of Drivers | 1 | Digi-Key | |
| Operating Temperature Range | -40°C ~ 150°C (TJ) | Digi-Key | |
| Package Case | SC-74A, SOT-753 | Digi-Key | |
| Rise Fall Time (Typ) | 19ns, 15ns | Digi-Key | |
| Supplier Device Package | SOT-23-5 | Digi-Key | |
| Voltage Supply | 4.5V ~ 18V | Digi-Key |
When To Use
Use the MCP1402T-E/OT in low-side gate driver applications requiring a single channel with peak source and sink currents of 500mA. It is well suited for driving IGBT and both N-Channel and P-Channel MOSFETs in power conversion circuits operating from 4.5V to 18V supply voltage. Ideal applications include motor drivers and DC-DC converters where fast switching is needed, benefiting from the typical rise and fall times of 19ns and 15ns respectively. Its non-inverting input logic with V_IL of 0.8V and V_IH of 2.4V makes it compatible with standard 3.3V and 5V logic levels. The compact SC-74A (SOT-753) package supports surface-mount designs requiring a small footprint and operation over a wide temperature range (-40°C to 150°C junction).
When Not To Use
Do not use the MCP1402T-E/OT in applications requiring multiple gate driver channels or high-side driver configurations, as it only provides a single low-side driver channel. For circuits demanding programmable drive strength or peak currents exceeding 500mA, consider other drivers designed for higher current capacity or programmable output. Avoid using this device in environments where operating temperature exceeds 150°C junction or where logic input thresholds differ significantly from 0.8V (low) and 2.4V (high), such as 1.8V logic systems. For high-side or half-bridge driver topologies, select dedicated high-side drivers or half-bridge driver ICs.
Application Notes
The MOSFET or IGBT gate node switches rapidly and must have the smallest possible loop area to minimize parasitic inductance and ringing. Place the gate resistor as close as possible to the gate pin of the transistor. The MCP1402T-E/OT input pin is noise-sensitive; route the input signal traces away from high-current switching nodes and use proper grounding techniques. At typical operating points with 500mA peak current and supply voltage up to 18V, a heatsink is generally not required due to the device’s small package and efficient switching, but thermal management should be verified in high ambient temperature or continuous high-frequency operation.
Gotchas
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Mistake: Omitting or undersizing the gate resistor.
Failure Mode: Excessive inrush current causes voltage overshoot and ringing on the gate node, potentially damaging the MOSFET/IGBT or causing electromagnetic interference (EMI).
Fix: Include a gate resistor in the range of 10Ω to 22Ω, placed as close as possible to the gate terminal to dampen switching transients. -
Mistake: Using a supply voltage outside the specified 4.5V to 18V range.
Failure Mode: Device may fail to drive the gate properly, or permanent damage can occur to the driver IC.
Fix: Use a regulated supply within the specified voltage range and verify supply voltage stability under load. -
Mistake: Long or high-inductance wiring between the driver and the MOSFET gate.
Failure Mode: Increased parasitic inductance causes slow switching, voltage spikes, and possible device malfunction.
Fix: Keep gate drive wiring as short and low-inductance as possible, and place decoupling capacitors close to the driver IC.