MP18021HQ-A-LF-P

Overview

The MP18021HQ-A-LF-P is a high-frequency half-bridge gate driver designed for N-channel power MOSFETs. It features a VBST voltage range of up to 100V and operates with a supply voltage between 9V and 18V. The device provides independent control of high-side and low-side channels with matched propagation delays under 5ns. Typical switching times include a 12ns rise time and 9ns fall time when driving a 1nF load at 12V VDD. It incorporates an integrated bootstrap diode, UVLO protection for both drivers, and TTL-compatible inputs.

Feature Summary

• Independent high-side and low-side channel control with matched delay characteristics
• Integrated bootstrap diode reduces external component count
• Under-voltage lockout (UVLO) forces outputs low during insufficient power conditions
• TTL-compatible input logic levels

Applications

• High-frequency half-bridge power conversion circuits
• N-channel MOSFET gate drive applications
• Industrial motor drives
• Power supply topologies requiring isolated or floating high-side driving

Procurement Notes

Verify the specific suffix 'HQ' indicates the QFN-8 package variant rather than the standard SOIC-8 EPAD. Confirm that the '-A-' designation aligns with your required quality or revision level. Cross-reference the full part number against official MPS documentation to ensure compatibility with your PCB footprint and thermal requirements before finalizing orders.

Selection Notes

Select this component when driving N-channel MOSFETs in half-bridge configurations requiring high-speed switching. The 100V VBST rating supports high-voltage applications. Ensure the input signal meets TTL compatibility standards. Consider the QFN-8 package if space constraints preclude the use of the SOIC-8 variant. Verify that the 12V VDD operating condition matches your system's available rail.

Part Context

This part belongs to the MP18021 series of high-frequency half-bridge gate drivers from Monolithic Power Systems. The series is characterized by its ability to drive N-channel MOSFETs with precise timing control. The HQ suffix typically denotes a specific package type, distinguishing it from other variants like the HN series which may utilize different footprints such as SOIC-8 EPAD.

Replacement Considerations

MP18021HN-LF-P: Standard SOIC-8 EPAD package version of the same driver core. MP18021HQ-LF-Z: Tape and reel packaging variant of the HQ package. MP18021HQ-LF-P: Same package but potentially different reel quantity or manufacturer lot specifications.