Monolithic Power Systems Inc. MPQ1924HS-LF-P

Overview

MPQ1924HS-LF-P from Monolithic Power Systems is a high-frequency, 100V-rated, half-bridge N-channel MOSFET gate driver in SOIC-8 package, featuring independently controlled high-side and low-side drivers with <5ns propagation delay matching, integrated bootstrap diode, and dual UVLO protection. It drives 2.2nF loads with 15ns rise/12ns fall times at 12V VDD and supports motor drivers and telecom DC-DC converters.

For engineers reviewing the MPQ1924HS-LF-P datasheet, MPQ1924HS-LF-P pinout, MPQ1924HS-LF-P application, or MPQ1924HS-LF-P equivalent, key selection criteria include bootstrap voltage range (118V), gate drive matching (<5ns), TTL-compatible inputs, SOIC-8 thermal performance (θJA = 96°C/W), and dual UVLO thresholds (VDDR = 8.4V, VBSTR = 7.3V).

Technical Context

The MPQ1924HS-LF-P implements a dual-channel, non-overlapping gate driver architecture with separate high-side floating and low-side grounded output stages. Its bootstrap circuit enables high-side operation up to 100V SW voltage with 118V BST-to-SW rating and integrated diode reduces external component count.

Independent INH/INL control allows dead-time management to prevent shoot-through; timing parameters are guaranteed by design (TMON/TMOFF ≤5ns, TPW ≥50ns). Thermal shutdown activates at 150°C with 25°C hysteresis, and SOIC-8 exposed pad (Pin 7) must be connected to VSS for thermal integrity.

Key Specifications

Pinout & Package

MPQ1924HS-LF-P is housed in a thermally enhanced SOIC-8 package with exposed VSS pad (Pin 7) requiring PCB copper connection for thermal dissipation. Package dimensions conform to JEDEC MS-012 AA standard; θ_JA = 96°C/W on 4-layer board.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IRS21844SPbF and LM5109BMAX, MPQ1924HS-LF-P uniquely combines integrated bootstrap diode, dual-rail UVLO, and <5ns channel matching in an 8-pin SOIC-reducing layout complexity and improving system-level reliability in 100V-class half-bridge designs.

Availability

MPQ1924HS-LF-P is available at Aetrix Electronics and suitable for motor drivers, telecom half-bridge power supplies, and avionics DC-DC converters requiring stable component supply, RoHS-compliant packaging, and automotive-grade reliability screening.

Supply support for MPQ1924HS-LF-P 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 core expertise in DC-DC conversion, motor control, and gate driver technologies.

The MPQ1924 product line targets high-efficiency, high-voltage half-bridge power stages in telecom, industrial, and aerospace applications-designed for minimal external components, precise timing, and robust fault protection.

FAQ

What is the maximum allowable SW node voltage swing for MPQ1924HS-LF-P?

The absolute maximum SW voltage is −5.0V to +105V, but recommended operating range is −1.0V to +100V. Exceeding 100V risks violating the (VBST–SW) UVLO threshold and may cause unintended high-side driver disablement or latch-up under transient conditions.

Can MPQ1924HS-LF-P drive P-channel MOSFETs on the high side?

No-it is designed exclusively for N-channel MOSFET half-bridges. The high-side driver is a floating bootstrap stage optimized for N-MOS gate drive; it lacks level-shifting architecture or negative voltage capability required for P-MOS high-side control.

Is the bootstrap diode rated for continuous conduction in high-duty-cycle applications?

Yes-the integrated diode is characterized at 100μA (VF = 0.5V) and 100mA (VF = 0.95V), with dynamic resistance of 2Ω. It supports typical bootstrap recharge duty cycles up to 95% in forward and active-clamp topologies per MPS application notes.

How does the exposed pad (Pin 7) affect thermal performance?

Pin 7 is electrically VSS and thermally critical: soldering it to ≥1 cm² of inner-layer ground copper reduces θ_JA from 96°C/W to ~55°C/W. Omitting this connection risks junction temperature exceeding 150°C at >300mW dissipation.

Does MPQ1924HS-LF-P support 3.3V logic inputs?

No-its INH/INL inputs require minimum 2.0V for logic high (typical 2.4V) and maximum 1.4V for logic low. Direct 3.3V CMOS outputs are compatible, but 3.3V LVTTL or open-drain drivers may require series resistor or level-shifter to meet VIH/VIL specs.

What happens if both INH and INL go high simultaneously?

The device will attempt to turn on both high-side and low-side MOSFETs, causing shoot-through. While MPQ1924HS-LF-P has no built-in dead-time generator, its <5ns channel matching ensures minimal overlap if external controller enforces ≥50ns minimum pulse width (TPW) and proper sequencing.

Is there a recommended minimum BST capacitor value?

MPS recommends ≥0.1µF ceramic capacitor between BST and SW pins. Smaller values increase voltage droop under high-frequency switching (>500kHz) and may trigger (VBST–SW) UVLO; larger values (e.g., 0.22µF) improve stability in telecom 48V systems with fast load transients.