MCP1402T-E/OT vs STGAP2SICSANCTR Gate Drivers: Detailed Component Comparison
Quick verdict
For simple low-side MOSFET or IGBT gate driving at moderate current and cost-sensitive designs, the MCP1402T-E/OT is the straightforward choice, offering a compact SOT-23-5 package and 500mA peak drive capability. For isolated high-voltage applications requiring galvanic isolation, high transient immunity, and up to 4A peak drive current, the STGAP2SICSANCTR is the clear winner, despite its larger SO-8 package and more complex design considerations.
Spec comparison table
| Spec | MCP1402T-E/OT | STGAP2SICSANCTR | Notes |
|---|---|---|---|
| Channel type | Single | Single | Equal |
| Current peak output source/sink | 500mA / 500mA | 4A sink/source @25°C | ST device offers 8x higher peak drive current, enabling faster switching and larger MOSFETs |
| Driven configuration | Low-Side | Not explicitly stated (isolated) | MCP1402T-E/OT is low-side driver; ST device provides galvanic isolation for high-side or isolated loops |
| Gate type supported | IGBT, MOSFET (N-/P-Channel) | MOSFET (implied) | MCP1402T-E/OT explicitly supports IGBT and both MOSFET types; ST datasheet focuses on MOSFET |
| Input type | Non-Inverting | TTL/CMOS compatible (3.3V, 5V) | Both support standard logic inputs |
| Logic voltage thresholds (V_IL / V_IH) | 0.8V / 2.4V | 0.29·VDD - 0.39·VDD (input low), 0.58·VDD - 0.7·VDD (input high) | MCP1402T-E/OT fixed thresholds; ST device thresholds scale with supply voltage |
| Supply voltage | 4.5V ~ 18V | 3.1V ~ 5.25V | MCP1402T-E/OT supports wider supply voltage; ST device limited to low-voltage logic side |
| Operating temperature range (TJ) | -40°C ~ 150°C | -40°C ~ 125°C | MCP1402T-E/OT supports higher max TJ, useful in high-temp environments |
| Package case | SC-74A (SOT-23-5) | SO-8 (3.90 mm width) | MCP1402T-E/OT is smaller footprint, better for space-constrained designs |
| Rise time (typical) | 19 ns | 30 ns | MCP1402T-E/OT has faster rise time, beneficial for high-frequency switching |
| Fall time (typical) | 15 ns | 30 ns | MCP1402T-E/OT also faster fall time |
| Voltage isolation | None | 2830 Vrms galvanic isolation | ST device provides significant isolation, critical for high-voltage and safety requirements |
| Common mode transient immunity | Not specified | 100 V/ns (min) | ST device designed for high transient immunity, reducing false triggering in noisy environments |
| Propagation delay (input to output) | Not specified | 45 ns (typical) | MCP1402T-E/OT likely lower delay but not specified; ST device delay is moderate |
| Pulse width distortion (max) | Not specified | 20 ns | ST device specs pulse distortion; no data for MCP1402T-E/OT |
| Quiescent supply current (typ) | Not specified | 1.3 mA (min) - 1.9 mA (max) | MCP1402T-E/OT likely lower but unverified; ST device quiescent current is moderate |
| Standby quiescent supply current | Not specified | 400 µA - 700 µA | ST device offers standby mode with reduced current; MCP1402T-E/OT no data |
| UVLO thresholds | Not specified | Turn-on 14.5 - 16.4 V; Turn-off 13.8 - 15.7 V | Only ST device provides UVLO thresholds for protection |
| Gate driver output max voltage | 18 V max supply | Up to 26 V gate drive voltage | ST device supports higher gate drive voltage, useful for driving MOSFETs with higher Vth |
| Maximum switching frequency | Not specified | 1 MHz (max) | ST device limited to 1 MHz; MCP1402T-E/OT no specified limit but likely similar |
| Isolation resistance | None | >10^9 Ω (typ) | ST device provides high isolation resistance, essential in isolated gate drive |
| ESD protection | Not specified | 2 kV HBM | ST device rated for 2 kV human body model ESD protection |
| Thermal resistance junction-to-ambient (max) | Not specified | 123 °C/W | ST device package thermal resistance high (typical for SO-8); MCP1402T-E/OT likely better due to smaller package |
| Package pin count | 5 pins | 8 pins | MCP1402T-E/OT simpler pinout; ST device requires more pins due to isolation and additional features |
| Mounting type | Surface mount | Surface mount | Equal |
| Grade / Qualification | Not specified | Automotive grade, AEC-Q100 qualified | ST device meets automotive standards for reliability |
| Voltage peak test | Not specified | 2828 / 4000 VRMS / VPEAK (type test) | Only ST device specifies high-voltage isolation tests, critical for safety-critical systems |
| Bypass capacitor recommended | Not specified | 100 nF - 10 µF | ST device requires specific bypass capacitor sizing for stable operation |
Design trade-offs
The MCP1402T-E/OT is a basic, low-cost, low-side driver optimized for straightforward MOSFET or IGBT drive applications without isolation. Its 500mA peak output current suits gate charges typical of small to medium MOSFETs. The compact SOT-23-5 package enables dense PCB layouts and minimal BOM complexity but offers no galvanic isolation or protection features. Its faster rise/fall times (19 ns/15 ns) allow for efficient switching at moderate frequencies, and its wide supply range (4.5V to 18V) provides flexibility in power rail choices.
In contrast, the STGAP2SICSANCTR is a galvanically isolated gate driver using capacitive coupling technology, supporting up to 4A peak drive current. This makes it suitable for driving large MOSFETs or IGBTs in high-voltage half-bridge or isolated topologies. The 2830 Vrms isolation rating and 100 V/ns common-mode transient immunity enable safe operation in noisy industrial or automotive environments where isolation is mandatory. However, the ST device has slower rise and fall times (30 ns each) and longer propagation delays (~45 ns), which can limit switching frequency and increase switching losses in some designs.
The ST device’s supply voltage is limited to 3.1V to 5.25V on the logic side, requiring a separate isolated supply for the high-voltage side up to 26V, increasing system complexity. Its SO-8 package is larger than the MCP1402T-E/OT’s SOT-23-5, leading to higher PCB space requirements and potentially higher thermal resistance (123 °C/W max). The quiescent and standby currents of the ST device (1.3–1.9 mA typical, 400–700 µA standby) are higher than what might be expected from the MCP1402T-E/OT, which can matter in low-power or battery-operated systems.
From a layout perspective, the MCP1402T-E/OT’s simple 5-pin package and lack of isolation simplify routing but limit its use to low-side or non-isolated gate drive. The ST device requires careful placement of bypass capacitors (100 nF to 10 µF recommended), and PCB layout must accommodate isolation creepage and clearance distances, impacting board size and cost. Firmware drivers may also need to account for the ST device’s longer propagation delays and pulse width distortion, which can complicate timing in fast switching applications.
Cost-wise, the MCP1402T-E/OT is generally cheaper per unit and simpler to implement, making it ideal for volume, low-cost designs without isolation requirements. The STGAP2SICSANCTR, with its isolation and automotive qualification, will be more expensive and suited to safety-critical or high-voltage industrial applications where isolation and robustness justify the cost.
Use-case fit
Choose MCP1402T-E/OT when…
- Driving low-side N-channel MOSFETs or IGBTs in non-isolated DC-DC converters or motor drives.
- PCB space is limited and a minimal package size is critical.
- Peak gate drive current up to 500 mA is sufficient for the MOSFET gate charge at target switching frequencies.
- Operating temperature range up to 150°C is required (e.g., harsh environments).
- Cost-sensitive applications where