MCP1402T-E/OT vs MAX17605AUA+ Gate Driver ICs: Detailed Component Comparison
Quick verdict
For straightforward, low-cost, low-current N-channel MOSFET driving at moderate switching speeds, the MCP1402T-E/OT offers a simple, compact solution with adequate 500mA peak drive and a wide supply range up to 18V. For high-current gate driving where fast switching and higher peak currents (up to 4A) are critical—especially with SiC MOSFETs or IGBTs—the MAX17605AUA+ is the superior choice despite a more limited supply voltage range and larger package.
Spec comparison table
| Spec | MCP1402T-E/OT | MAX17605AUA+ | Notes |
|---|---|---|---|
| Channel type | Single | Independent (2 drivers) | MAX17605AUA+ supports dual independent drivers, enabling multi-FET or half-bridge configs. |
| Peak output source/sink current | 500mA / 500mA | 4A / 4A | MAX17605AUA+ offers 8x higher peak drive current, crucial for large MOSFET gates or SiC devices. |
| Driven configuration | Low-Side | Low-Side | Both support low-side driving only. |
| Gate types supported | IGBT, MOSFET (N/P channel) | IGBT, SiC MOSFET | MAX17605AUA+ explicitly supports SiC MOSFETs, indicating optimization for fast-switching wide-bandgap devices. |
| Input type | Non-inverting | Inverting, Non-inverting | MAX17605AUA+ offers input flexibility; MCP1402T-E/OT is non-inverting only. |
| Logic voltage V_IL / V_IH | 0.8 V / 2.4 V | 2 V / 4.25 V | MCP1402T-E/OT has lower logic-level thresholds, easier to interface with 3.3 V logic. |
| Voltage supply range | 4.5 V – 18 V | 4 V – 14 V | MCP1402T-E/OT supports higher max supply voltage, enabling operation closer to 18 V rails. |
| Operating temperature range (TJ) | -40°C to 150°C | -40°C to 150°C | Comparable thermal range. |
| Package | SOT-23-5 (SC-74A, SOT-753) | 8-pin uMAX-EP / uSOP-EP | MCP1402T-E/OT is smaller (5-pin SOT-23); MAX17605AUA+ uses larger 8-pin exposed pad package. |
| Rise time (typical) | 19 ns | 6 ns | MAX17605AUA+ has significantly faster rise time, improving switching performance. |
| Fall time (typical) | 15 ns | 5 ns | Faster fall time on MAX17605AUA+ reduces switching losses and improves dead time control. |
| Propagation delay (typ) | Not specified | 12 ns | MAX17605AUA+ provides documented 12 ns delay, useful for timing-sensitive designs. |
| Quiescent current (typ) | Not specified | 1 mA | Low quiescent current on MAX17605AUA+ supports efficiency in low-duty or standby modes. |
| Decoupling capacitor (typ/min) | Not specified | 2.2 µF (typ), 10 µF (min) | MAX17605AUA+ requires substantial decoupling, impacting PCB area and BOM. |
| Enable pin thresholds | Not specified | Enable high: 2.1 V; low: 0.8 V; hysteresis: 0.9 V | MAX17605AUA+ includes enable pin with defined thresholds and hysteresis, improving control. |
| Output resistance pull-up / pull-down | Not specified | 0.88 – 1.85 Ω / 0.5 – 0.95 Ω | Lower output resistance on MAX17605AUA+ supports higher current with less voltage drop. |
| Junction-to-ambient θJA (typ/max) | Not specified | 42°C/W (min), 136°C/W (typ), 77.6°C/W (max) | Thermal resistance data only available for MAX17605AUA+, useful for thermal design. |
| Storage temperature range | Not specified | -65°C to 150°C | MAX17605AUA+ supports wider storage temperature range. |
| Logic input hysteresis | Not specified | 0.9 V | MAX17605AUA+ provides input hysteresis, reducing noise sensitivity. |
| Supply current (typ) | Not specified | 1 mA | Low supply current on MAX17605AUA+ reduces operating losses. |
| Number of drivers | 1 | 2 | MAX17605AUA+ can drive two gates independently, enabling half-bridge or multi-FET topologies. |
| Mounting type | Surface mount | Surface mount | Both are SMT components. |
| Package size | SOT-23-5 (approx. 2.9 x 2.8 mm) | 8-pin uMAX-EP (3 x 2 mm) | MCP1402T-E/OT is smaller, suitable for space-constrained boards. |
Design trade-offs
The MCP1402T-E/OT is a simple, single-channel low-side driver optimized for moderate gate drive currents (500mA peak) and a wide supply voltage range (4.5–18 V). Its SOT-23 package is compact, minimizing PCB footprint and allowing cost-effective, space-constrained implementations. The relatively fast rise/fall times (19 ns / 15 ns) are adequate for many standard MOSFETs but may limit switching speeds when driving large gate charge devices or fast wide-bandgap MOSFETs.
In contrast, the MAX17605AUA+ is designed for demanding gate drive scenarios, offering 4A peak source/sink current, enabling rapid charging/discharging of large gate capacitors. This is particularly important for IGBTs and SiC MOSFETs, where minimizing switching losses hinges on fast gate transitions. The dual-driver configuration supports driving two independent low-side switches, useful in half-bridge or synchronous rectifier topologies. However, this capability comes at the cost of a larger 8-pin package and the need for a minimum 10µF decoupling capacitor, increasing BOM and PCB area.
Thermal considerations favor the MAX17605AUA+ when driving large MOSFETs at high switching frequencies. Its documented junction-to-ambient thermal resistances and low output on-resistance (0.5–1.85 Ω) allow for better thermal management and reduce conduction losses inside the driver. The MCP1402T-E/OT lacks detailed thermal specs and has lower peak current capability, which may limit its use in high-frequency, high-current applications.
The input logic thresholds also imply different interfacing challenges: MCP1402T-E/OT’s lower VIH (2.4 V) is easier to drive from 3.3 V logic directly, whereas the MAX17605AUA+ requires at least 4.25 V for high-level input, often necessitating level shifting or 5 V logic. However, MAX17605AUA+ supports both inverting and non-inverting inputs and includes an enable pin with hysteresis, offering more flexible control and noise immunity in complex systems.
Cost-wise, MCP1402T-E/OT is likely cheaper per unit and simpler to implement, given its smaller package and fewer external components. MAX17605AUA+ demands careful decoupling and layout due to high transient currents, requiring low-inductance PCB design and possibly thermal vias to maintain reliability.
Use-case fit
Choose MCP1402T-E/OT when…
- Driving a single low-side N-channel MOSFET with gate charge < 50 nC in applications with supply voltages up to 18 V.
- PCB space is extremely limited, and a small 5-pin SOT-23 package is required.
- The control logic voltage is 3.3 V or lower, and you want to avoid level shifters.
- Peak gate drive current needs do not exceed 500mA, e.g., small power stages or low-frequency switching.
- Cost sensitivity is high and external BOM components must be minimal.
Choose MAX17605AUA+ when…
- Driving large gate charge devices like IGBTs or SiC MOSFETs requiring peak currents up to 4A for fast switching.
- Implementing synchronous rectification or half-bridge configurations needing two independent low-side drivers in one package.
- High switching frequencies (≥500 kHz) demand minimal rise/fall times (5–6 ns) to reduce switching losses.
- System architecture benefits from an enable pin with hysteresis and input flexibility (inverting/non-inverting).
- Thermal management is critical, and detailed thermal resistance information is needed to design heatsinking or PCB cooling.
Drop-in compatibility
The MCP1402T-E/OT and MAX17605AUA+ are not pin-compatible or footprint-compatible. MCP1402T-E/OT is a 5-pin SOT-23 package with a single driver channel; MAX17605AUA+ uses an