Monolithic Power Systems Inc. MP18024HN-LF

Overview

MP18024HN-LF from Monolithic Power Systems is a high-frequency, 100V-rated, half-bridge N-channel MOSFET gate driver in SOIC8E package, delivering matched 20ns propagation delay (typ), <5ns channel-to-channel timing skew, and integrated bootstrap diode. It drives 2.2nF loads with 15ns rise/12ns fall times at 12V VDD and supports telecom half-bridge power supplies.

For engineers reviewing the MP18024HN-LF datasheet, MP18024HN-LF pinout, MP18024HN-LF application, or MP18024HN-LF equivalent, key selection criteria include bootstrap voltage range (VBST up to 118V), independent INH/INL control for dead-time management, UVLO thresholds on both high-side and low-side supplies, and thermal shutdown at 150°C.

Technical Context

The MP18024HN-LF implements dual independent drivers: a grounded low-side channel (DRVL) and a floating high-side channel (DRVH) referenced to SW, enabled by internal level-shifting and an integrated bootstrap diode. Its architecture avoids external bootstrap diodes and supports operation with VSW up to 100V and dV/dt slew rates under 50V/ns.

UVLO circuitry monitors both VDD (threshold 8.4V ±0.5V) and BST–SW (7.3V ±0.55V), forcing DRVH and DRVL low during undervoltage conditions. Input logic is TTL-compatible with internal 185kΩ pull-down resistors on INH and INL, enabling direct interface with PWM controllers without external biasing.

Key Specifications

Pinout & Package

MP18024HN-LF uses the SOIC8E package (JEDEC MS-012 BA), featuring an exposed thermal pad (Pin 7, VSS) that must be soldered to PCB ground for thermal performance. Package dimensions: 5.0mm × 6.2mm × 1.75mm, pitch 1.27mm.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar half-bridge gate driver applications.

Compared with IRS21844PbF and LM5109BMAX, MP18024HN-LF delivers tighter timing matching (<5ns vs ≥10ns), lower propagation delay (20ns vs ≥25ns), and full dual-rail UVLO-making it optimal for high-frequency, space-constrained telecom and avionics converters where reliability and layout simplicity are critical.

Availability

MP18024HN-LF is available at Aetrix Electronics and suitable for telecom half-bridge power supplies, avionics DC-DC converters, and two-switch forward converters requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for MP18024HN-LF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance analog and power ICs, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The MP18024 belongs to MPS's high-voltage gate driver product line, engineered specifically for isolated and non-isolated DC-DC topologies operating up to 100V bus voltages in telecom, industrial, and aerospace applications.

FAQ

What is the maximum allowable V_SW voltage for continuous operation?

The MP18024HN-LF supports continuous operation with V_SW up to +100V, as specified in Recommended Operating Conditions. Absolute maximum rating is +105V, but sustained operation above 100V risks exceeding thermal limits or violating safe operating area constraints in high-duty-cycle applications.

Can INH and INL be tied together for synchronous operation?

Yes, INH and INL may be connected to drive both MOSFETs simultaneously-as required in two-switch forward topologies-but this eliminates independent dead-time control. For half-bridge operation, separate timing is mandatory to avoid shoot-through; the device does not include internal dead-time generation.

Is the exposed thermal pad (Pin 7) electrically connected to VSS?

Yes, Pin 7 is the VSS terminal and the exposed pad is internally bonded to the die substrate ground. It must be soldered to a PCB copper pour connected to system ground to achieve the specified θ_JA = 48°C/W and prevent thermal shutdown under full-load conditions.

Does the integrated bootstrap diode support bidirectional current flow?

No-the integrated diode is unidirectional and conducts only from VDD to BST during bootstrap capacitor charging. It does not conduct reverse current; therefore, the bootstrap capacitor discharges only through the high-side driver's internal paths and external gate capacitance.

What is the minimum recommended dead time between INH and INL transitions?

MPS does not specify a fixed minimum dead time, as it depends on external MOSFET gate charge and layout parasitics. However, based on <5ns timing skew and 20ns propagation delay, a practical minimum is 50ns-verified in typical 2.2nF load evaluations-to ensure complete turn-off before complementary turn-on.

How does UVLO behave when only VDD is valid but BST–SW falls below threshold?

When BST–SW drops below 7.3V (typ), the high-side driver (DRVH) is forced low regardless of INH state, while DRVL remains functional if VDD is valid. This prevents partial high-side activation and potential shoot-through, preserving system safety during bootstrap capacitor undercharge.

Is MP18024HN-LF qualified for automotive AEC-Q100?

No-MP18024HN-LF is not AEC-Q100 qualified. It is rated for industrial temperature range (−40°C to +125°C) and intended for telecom, avionics, and industrial power applications. MPS offers AEC-Q100 variants (e.g., MP18024A) for automotive use, with different qualification testing and marking.