Key Specs
| Spec | Value | Condition | Source |
|---|---|---|---|
| Channel Type | Single | Digi-Key | |
| Current Peak Output Source Sink | 1.5A, 1.5A | 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 | 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) | 20ns, 20ns | Digi-Key | |
| Supplier Device Package | SOT-23-5 | Digi-Key | |
| Voltage Supply | 4.5V ~ 18V | Digi-Key |
When To Use
- Use the MCP1415T-E/OT when driving low-side N-channel MOSFETs or IGBTs in applications requiring a single channel driver with peak output currents up to 1.5A, such as in motor control or power switching circuits. Its input supply voltage range of 4.5V to 18V and fast switching capability (delay times typically 60–70 ns) make it suitable for moderate-frequency switching applications up to 57 MHz.
- Avoid using this device in high-side driver applications or where isolated gate drive is required, as it is designed for low-side driven configurations only. For high-side or isolated gate driving, use dedicated high-side drivers or isolated gate driver ICs.
- Do not use this driver in circuits requiring load capacitances significantly exceeding 1000 pF, as excessive capacitive load will degrade switching performance and increase power dissipation.
- For applications requiring programmable logic or complex gate drive control, this device is not suitable since it is not verified as programmable via Digi-Key or similar platforms.
When Not To Use
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Output current >1.5A continuous at high efficiency: The peak output current rating is 1.5A, limiting continuous current capability. For higher currents where efficiency and thermal management are critical, use a high-current synchronous buck with external FETs instead.
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Applications requiring very low quiescent current (μA range): Quiescent current in high state is 0.65 mA typical, which is too high for battery-powered or always-on systems demanding ultra-low standby consumption. Use a low-IQ PFM buck for such low-power needs.
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Switching frequencies above 500 kHz for compact magnetics: Although the max frequency is 57 MHz, typical switching frequencies are not specified and rise/fall times are ~20 ns. For designs requiring stable operation above 500 kHz with small inductors, a high-frequency buck controller optimized for this regime is recommended.
Application Notes
- The MOSFET gate node switches rapidly and must have the smallest possible loop area to minimize parasitic inductance and EMI. Place the MCP1415 driver as close as possible to the MOSFET gate pin.
- The input pin is noise-sensitive due to its inverting input type and maximum input voltage of +5V. Use proper signal conditioning and shielding to prevent false triggering.
- A heatsink is generally not required at typical operating points due to the low quiescent current (0.1 mA low state, 0.65 mA high state) and peak output current of 1.5A, but thermal resistance of approximately 220.7 °C/W should be considered in high-frequency or high-duty-cycle applications to ensure junction temperature remains below the maximum of +150 °C.
- Operating temperature range is -40 °C to +125 °C; ensure thermal management strategies are in place to maintain device within this range under all operating conditions.
Gotchas
- Incorrect Supply Voltage: Applying a supply voltage outside the specified 4.5V to 18V range (e.g., above 18V) can permanently damage the device or cause erratic operation. Always verify supply voltage with a regulated source within specification to avoid failure.
- Exceeding Peak Output Current: Driving gate loads that require peak currents above 1.5A can cause the driver to enter thermal shutdown or reduce output drive capability, leading to slow switching and increased losses. Use a gate resistor to limit peak current and ensure load capacitance does not exceed 1000 pF.
- Improper PCB Layout: Failing to minimize the loop area of the switching node (gate and source connections) can lead to high EMI and voltage spikes, potentially damaging the MOSFET or driver. Use short, low-inductance traces and place the driver close to the MOSFET gate.
- Neglecting Pull-Down Resistor: Omitting the pull-down resistor on the gate output can cause the MOSFET to unintentionally turn on during power-up or input signal absence, resulting in shoot-through current and potential device damage. Always include a high-value pull-down resistor.