Monolithic Power Systems Inc. MPQ1925HR-LF-P

Overview

MPQ1925HR-LF-P from Monolithic Power Systems is a high-frequency, N-channel MOSFET half-bridge gate driver with 100V switching node rating, 4A peak sink/source capability per channel, and <5ns propagation delay matching between high-side and low-side drivers. It integrates a bootstrap diode, supports 8–15V VDD operation, and delivers 15ns rise/10ns fall times into 2.2nF loads-enabling efficient motor drives and telecom DC/DC converters.

For engineers reviewing the MPQ1925HR-LF-P datasheet, MPQ1925HR-LF-P pinout, MPQ1925HR-LF-P application, or MPQ1925HR-LF-P equivalent, key selection criteria include bootstrap voltage range (up to 115V), independent TTL-compatible INH/INL control, UVLO thresholds (7.7V VDD rising, 6.8V BST-SW rising), thermal performance in QFN-8 (θJA = 47°C/W), and shoot-through prevention via matched timing.

Technical Context

The MPQ1925HR-LF-P implements dual independent gate drivers: a floating high-side channel (DRVH) referenced to SW and a grounded low-side channel (DRVL), both controlled by separate TTL-level inputs (INH and INL). Its internal bootstrap diode eliminates external diode requirement while supporting up to 115V BST-to-SW differential voltage.

UVLO protection operates independently on VDD and BST-SW rails with 0.7V hysteresis each, forcing both outputs low during undervoltage conditions. Propagation delays (tDHRR/tDLRR typ. 20ns) and matching (≤5ns skew) are guaranteed across -40°C to +150°C junction temperature.

Key Specifications

Pinout & Package

MPQ1925HR-LF-P is housed in a thermally enhanced QFN-8 package (4mm × 4mm, 0.75mm height) with exposed thermal pad (Pin 7/VSS) for PCB heat sinking. The package complies with JEDEC MO-220 and RoHS/lead-free/halogen-free requirements.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPQ1925GR-LF-Z, the HR variant offers extended junction temperature capability critical for avionics and high-power density designs; versus LM5109B, it reduces component count and improves thermal performance via integrated BST diode and lower θJA.

Availability

MPQ1925HR-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, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MPQ1925HR-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, including DC/DC converters, LED drivers, and gate drivers, with global manufacturing and quality certifications.

The MPQ1925 belongs to MPS's high-frequency gate driver product line, designed specifically for compact, high-efficiency power conversion in telecom, industrial, and aerospace applications where thermal density and timing precision are critical.

FAQ

What is the maximum recommended switching frequency for MPQ1925HR-LF-P?

The MPQ1925HR-LF-P is characterized for reliable operation up to 1MHz, based on its 15ns/10ns rise/fall times into 2.2nF loads and <5ns channel matching. At 1MHz, typical operating current is 12mA, and thermal limits (θJA = 47°C/W) require adequate PCB copper area for the exposed pad to maintain T_J ≤ 150°C.

Does MPQ1925HR-LF-P require an external bootstrap diode?

No. MPQ1925HR-LF-P integrates a low-forward-voltage bootstrap diode (VF ≤ 0.9V at 100mA) between VDD and BST pins. This eliminates the need for an external diode, reducing component count, board area, and parasitic inductance in the bootstrap loop.

How is shoot-through prevented in MPQ1925HR-LF-P designs?

Shoot-through is prevented by independent INH/INL control with strict sequencing: a minimum dead time must be enforced between falling edges of INH and INL (or vice versa). The device itself does not generate dead time; it relies on external PWM controller timing or logic to ensure t_MON ≥ 1ns and t_MOFF ≥ 1ns as specified.

What is the role of the exposed thermal pad (Pin 7/VSS)?

Pin 7 is the exposed thermal pad, electrically connected to VSS and thermally coupled to the die. It must be soldered to a solid PCB ground plane using multiple thermal vias to achieve the specified θJA = 47°C/W and prevent junction overheating during 4A peak output currents.

Can MPQ1925HR-LF-P drive both MOSFETs simultaneously in a two-switch forward topology?

Yes. In two-switch forward converters, MPQ1925HR-LF-P drives both HS-FET and LS-FET simultaneously (INH and INL asserted together), unlike half-bridge or active-clamp topologies requiring alternating drive. Its independent inputs and matched timing support this synchronous mode without modification.

What is the minimum input pulse width required to toggle the outputs?

The minimum input pulse width (t_PW) is 50ns, as guaranteed by design. Pulses shorter than this may not reliably register at the input comparators, risking incomplete state transitions or metastability in high-frequency PWM applications.

Is MPQ1925HR-LF-P qualified for automotive applications?

MPQ1925HR-LF-P is not AEC-Q100 qualified. While it operates from -40°C to +150°C and meets RoHS/halogen-free requirements, it lacks automotive-specific stress testing and failure analysis documentation. For automotive use, consult MPS for qualified alternatives such as the MPQ6535 series.