MCP1402T-E/OT vs MCP1415T-E/OT: Component Comparison for Hardware Engineers
1. Quick verdict
For low-side gate driving with moderate current and non-inverting input logic, the MCP1402T-E/OT is a straightforward choice thanks to its fast rise/fall times and simpler logic interface. For applications requiring higher peak drive currents (up to 1.5A) and an inverting input stage—such as driving larger MOSFET gates or IGBTs with inverted logic—the MCP1415T-E/OT offers more drive strength at the cost of slower propagation delay and higher quiescent current.
2. Spec comparison table
| Spec | MCP1402T-E/OT | MCP1415T-E/OT | Notes |
|---|---|---|---|
| Channel Type | Single | Single | Same; single-channel drivers. |
| Input Type | Non-Inverting | Inverting | Choose based on required logic polarity; no better/worse intrinsically. |
| Peak Output Current (Source/Sink) | 500mA / 500mA | 1.5A / 1.5A | MCP1415T-E/OT has 3x higher drive current, better for large gate charges or fast switching. |
| Supply Voltage Range | 4.5V to 18V | 4.5V to 18V | Identical voltage range. |
| Rise Time (typical) | 19ns | 20ns | Comparable rise times; MCP1402T slightly faster. |
| Fall Time (typical) | 15ns | 20ns | MCP1402T-E/OT has faster fall time, beneficial for switching speed. |
| Operating Temperature Range | -40°C to 150°C (TJ) | -40°C to 125°C (TJ) | MCP1402T-E/OT supports higher max junction temperature, better for thermally demanding apps. |
| Package | SOT-23-5 (SC-74A, SOT-753) | SOT-23-5 (SC-74A, SOT-753) | Identical package and footprint. |
| Quiescent Current (Logic 1 typ) | Not specified | 0.65mA | MCP1402T-E/OT likely lower quiescent current, better for low-power designs. |
| Quiescent Current (Logic 0 typ) | Not specified | 0.1mA | MCP1415T-E/OT quiescent current specified; lower in logic 0 state. |
| Propagation Delay (typical) | Not specified | 60–70ns | MCP1402T-E/OT likely lower delay given faster rise/fall times; MCP1415T-E/OT slower delay. |
| Reverse Current Rating | 500mA | 500mA | Equal; both handle reverse current up to 500mA. |
| ESD Resistance (HBM) | Not specified | 2kV | MCP1415T-E/OT data provided; 2kV is moderate ESD rating. |
| Supply Current (Typ) | Not specified | 1.5mA | MCP1415T-E/OT has specified supply current; MCP1402T-E/OT likely similar or lower. |
| Switching Frequency Max | Not specified | 57MHz | MCP1415T-E/OT rated for max switching frequency; MCP1402T-E/OT not specified. |
| Input Logic Thresholds (Vil/Vih) | 0.8V / 2.4V | 0.8V / 2.4V | Identical thresholds, compatible with typical 3.3V/5V logic levels. |
| Mounting Type | Surface Mount | Surface Mount | Identical. |
| Number of Drivers | 1 | 1 | Single driver each. |
| Load Capacitive Capability | Not specified | 1000pF | MCP1415T-E/OT datasheet specifies capacitive load; may be more robust for large gate loads. |
| Thermal Resistance (typ) | Not specified | 220.7°C/W | MCP1415T-E/OT specified; high thermal resistance typical for SOT-23-5 package. |
| Voltage Supply Typ | 4.5V to 18V | 4.5V to 18V | Same. |
| Voltage Supply Max | 18V | 18V | Same. |
| Storage Temperature Range | Not specified | -65°C to +150°C | MCP1415T-E/OT storage range specified. |
3. Design trade-offs
The MCP1402T-E/OT and MCP1415T-E/OT cater to similar physical package and voltage supply ranges but diverge significantly in drive strength and input logic polarity. The MCP1415T-E/OT’s 1.5A peak source and sink current rating is three times that of the MCP1402T-E/OT, making it better suited for driving large gate capacitances—such as high-current MOSFETs or IGBTs—where quicker gate charge/discharge is critical to reduce switching losses and improve efficiency.
This higher drive current, however, comes with trade-offs. The MCP1415T-E/OT exhibits longer propagation delay (60–70ns typical) compared to the MCP1402T-E/OT’s faster rise/fall times (15–19ns), which can impact timing-critical applications. Also, the MCP1415T-E/OT has a higher quiescent current (1.5mA typical supply current) compared to the unspecified but likely lower quiescent current of the MCP1402T-E/OT. For battery-powered or low-power systems, the MCP1402T-E/OT could be preferable.
Thermally, the MCP1402T-E/OT supports a higher maximum junction temperature (150°C vs 125°C), granting more headroom in thermally constrained designs. The MCP1415T-E/OT’s specified thermal resistance (~220.7°C/W) indicates typical SOT-23-5 thermal dissipation limits; careful PCB layout with appropriate copper area is necessary to handle the higher drive currents without overheating.
Layout-wise, both being SOT-23-5 devices, PCB footprint changes are unlikely, but the higher peak currents on the MCP1415T-E/OT may necessitate wider gate drive traces and attention to minimizing loop inductance to prevent ringing or EMI issues.
Finally, the logic input polarity difference (non-inverting vs inverting) is a crucial consideration. It affects how the gate driver integrates into existing logic and firmware. Swapping one for the other without adjusting firmware or input signal polarity will lead to incorrect gate drive behavior.
4. Use-case fit
Choose MCP1402T-E/OT when:
- You need a compact, low-side gate driver with non-inverting input logic to directly interface with standard microcontroller GPIO pins without inversion.
- Your MOSFET or IGBT gate capacitance is moderate and peak drive current around 500mA suffices.
- Operating conditions include high ambient temperatures or tight thermal budgets that require junction temperature tolerance up to 150°C.
- Your design prioritizes faster switching edges and lower propagation delay for tight timing control.
- Quiescent current consumption is a concern, such as in battery-powered or low-power systems.
Choose MCP1415T-E/OT when:
- The MOSFET or IGBT gate charge is large, requiring up to 1.5A peak drive current to minimize switching losses.
- You have an inverted input logic scheme (active low enable) and want to avoid external inversion stages.
- Your application can tolerate longer propagation delays (60–70ns typical) and slightly slower rise/fall times in exchange for stronger drive capability.
- The design allows for slightly higher quiescent current (1.5mA typical) and has sufficient thermal management to handle increased power dissipation.
- You need a driver rated for capacitive loads up to 1000pF, ensuring stable operation under high gate charge conditions.
5. Drop-in compatibility
Both devices share the same SOT-23-5 package and have a single driver channel for low-side drive applications; however, they differ in input logic polarity—MCP1402T-E/OT is non-inverting, MCP1415T-E/OT is inverting. The pinouts are likely similar but not explicitly confirmed from the data provided.
Substituting one for the other without adjusting the input signal polarity or firmware logic will result in incorrect gate drive behavior (i.e., active high vs active low). Also, the MCP1415T-E/OT’s higher peak current capability could stress the gate or PCB traces if not accounted for.
Because detailed pin compatibility is not explicitly stated, engineers should verify pin assignments in the datasheets before substitution.
6. Alternatives to consider
- MIC4452 (Microchip): Higher current (up to 3A peak), non-inverting driver for demanding MOSFET gate drive with fast switching.
- TC4420 (Microchip): 6A peak current, non-inverting, robust gate driver for high-speed, high-current applications.
- UCC37322 (Texas Instruments): 5A peak current, non-in