Monolithic Power Systems Inc. MP1924AHS-LF-P

Overview

MP1924AHS-LF-P from Monolithic Power Systems is a high-frequency, half-bridge N-channel MOSFET gate driver with independent high-side and low-side control, 100V SW voltage rating, <5ns driver matching, and integrated bootstrap diode. It delivers 4.5A sink / 5.1A source current at 12V VDD and drives 2.2nF loads with 15ns rise/fall times-used in telecom DC/DC converters requiring precise dead-time control and shoot-through prevention.

For engineers reviewing the MP1924AHS-LF-P datasheet, MP1924AHS-LF-P pinout, MP1924AHS-LF-P application, or MP1924AHS-LF-P equivalent, key selection criteria include bootstrap voltage range (115V), UVLO thresholds (6.8V VDD, 6.5V BST–SW), propagation delay (20ns), thermal shutdown (150°C), and SOIC-8 package compatibility with legacy board layouts.

Technical Context

The MP1924AHS-LF-P implements dual independent CMOS input stages driving matched high-side (floating) and low-side (ground-referenced) output stages with TTL-compatible logic thresholds (INH/INL high ≥2.4V, low ≤1.4V). Its bootstrap architecture enables high-side operation up to 100V SW potential while maintaining VBST–VSW ≤115V.

UVLO circuitry monitors both VDD and BST–SW rails independently, forcing DRVH and DRVL low when either falls below threshold (6.8V ±0.4V for VDD; 6.5V ±0.4V for BST–SW), with 0.5V hysteresis. Propagation delays are tightly matched (TMON/TMOFF ≤5ns), supporting >1MHz switching in hard-switched topologies.

Key Specifications

Pinout & Package

MP1924AHS-LF-P is housed in an SOIC-8 package (5.0mm × 6.2mm, 1.75mm height) with gull-wing leads and exposed thermal pad on SOIC-8E variants; this variant uses standard SOIC-8 footprint without exposed pad. Pin 1 is marked by notch or dot; lead coplanarity ≤0.10mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IRS2004PbF and LM5109BMMX/NOPB, MP1924AHS-LF-P provides superior high-voltage resilience (100V SW), integrated bootstrap diode for reduced layout complexity, and dual-rail UVLO-making it optimal for telecom and avionics designs demanding reliability at elevated voltages and temperatures.

Availability

MP1924AHS-LF-P is available at Aetrix Electronics and suitable for telecom power supplies, avionics DC/DC converters, and industrial motor drivers requiring stable component supply, RoHS-compliant packaging, and long-term production continuity.

Supply support for MP1924AHS-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 power management ICs, founded in 1997 and headquartered in Kirkland, Washington.

The MP1924A product line targets high-frequency, high-voltage half-bridge gate driving in space-constrained, thermally demanding applications such as telecom infrastructure and aerospace power conversion.

FAQ

What is the maximum allowable negative voltage at the SW pin?

The SW pin tolerates -1.0V continuously and -25V for pulses shorter than 100ns. This specification enables safe operation during transformer leakage spike recovery in forward and flyback topologies without external clamping circuits.

Does MP1924AHS-LF-P require an external bootstrap diode?

No. The device integrates a bootstrap diode with 0.95V forward voltage at 100mA and 2.5Ω dynamic resistance, eliminating the need for an external diode and reducing PCB area and BOM count in compact designs.

How does the dual UVLO function protect the system?

Independent UVLO circuits monitor VDD and BST–SW rails. If either drops below its threshold (6.8V or 6.5V respectively), both DRVH and DRVL are forced low-preventing partial drive conditions that could cause shoot-through or MOSFET avalanche failure.

Can MP1924AHS-LF-P drive 400V-class MOSFETs?

No. While the SW pin handles up to +100V, the device itself is not rated for direct use with 400V bus systems. It is designed for topologies where the switching node voltage remains ≤100V, such as secondary-side synchronous rectification or low-ratio isolated DC/DC.

What is the thermal resistance (θJA) for the SOIC-8 package?

The SOIC-8 package has a junction-to-ambient thermal resistance of 96°C/W on a standard 4-layer JEDEC PCB per JESD51-7. This value assumes 1-in² copper pour on top and bottom layers with 2oz copper and thermal vias under the exposed pad (not present in standard SOIC-8).

Is there a minimum input pulse width requirement?

Yes. The minimum input pulse width (TPW) that reliably changes the output is 50ns, guaranteed by design. Pulses narrower than this may not register due to internal filtering and propagation latency.

How is shoot-through prevented in MP1924AHS-LF-P?

Shoot-through is prevented through strict timing control: the device guarantees ≤5ns skew between high-side and low-side driver turn-on/turn-off (TMON/TMOFF), and requires external dead-time insertion via controller-level sequencing of INH and INL signals.