Texas Instruments LMG1025QDEERQ1

Overview

LMG1025QDEERQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified single-channel low-side GaN and logic-level MOSFET driver optimized for automotive high-frequency switching applications. It delivers 7 A peak source / 5 A peak sink current, 2.6 ns typical rising propagation delay, 2.9 ns falling propagation delay, and 1.25 ns minimum input pulse width - enabling precise nanosecond laser pulsing in LiDAR and time-of-flight systems.

For engineers reviewing the LMG1025QDEERQ1 datasheet, LMG1025QDEERQ1 pinout, LMG1025QDEERQ1 application, or LMG1025QDEERQ1 equivalent, key selection criteria include propagation delay matching, split-output gate drive flexibility, UVLO/OTP protection integrity, thermal performance under 30 MHz burst operation, and compatibility with 2 mm × 2 mm WSON-6 (DEE) layout constraints.

Technical Context

The LMG1025QDEERQ1 implements a dual-input Schmitt-trigger AND-gate architecture with independent pull-down (IN+) and pull-up (IN−) input resistors, enabling robust noise immunity and flexible signal conditioning. Its split-output stage (OUTH/OUTL) allows independent gate resistor tuning for asymmetric rise/fall control - critical for minimizing ringing and optimizing EMI in GaN-based LiDAR transmitters.

Internally, the device integrates undervoltage lockout (4.0–4.35 V threshold with 85 mV hysteresis) and overtemperature protection (170 °C trip, 20 °C hysteresis), both active during fault conditions to prevent unintended FET turn-on. The 5 V nominal supply operates within ±2.5% tolerance and supports up to 5.25 V maximum continuous voltage.

Key Specifications

Pinout & Package

LMG1025QDEERQ1 uses a 2 mm × 2 mm, 6-pin WSON package (DEE variant) with wettable flanks and an exposed thermal pad internally connected to GND. This compact, low-inductance construction minimizes gate-loop parasitics essential for >10 MHz GaN switching.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-side GaN/MOSFET driver applications.

Compared with LMG1025QDEERQ1, LMG1210RGET offers greater drive strength but sacrifices automotive qualification and integrated protection, while UCC27611DR provides AEC-Q100 compliance and faster pulse handling but lacks split outputs needed for GaN-specific ringing mitigation - making LMG1025QDEERQ1 uniquely suited for precision automotive LiDAR and ToF gate driving.

Availability

LMG1025QDEERQ1 is available at Aetrix Electronics and suitable for automotive LiDAR, time-of-flight sensing, and high-frequency DC/DC converter designs requiring stable component supply, AEC-Q100 compliance, and nanosecond-level timing fidelity.

Supply support for LMG1025QDEERQ1 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and automotive-grade ICs, with decades of experience in high-reliability power management and signal chain solutions.

The LMG1025QDEERQ1 belongs to TI's automotive-qualified high-speed gate driver product line, engineered specifically for GaN-based LiDAR, ToF, and high-frequency power conversion in safety-critical vehicle systems.

FAQ

What is the minimum input pulse width supported by the LMG1025QDEERQ1?

The LMG1025QDEERQ1 supports a typical minimum input pulse width of 1.25 ns under standard test conditions (0 Ω series, 220 pF load). This capability is verified across the full operating temperature range (–40 °C to +125 °C) and enables precise laser diode pulsing in automotive LiDAR systems. The LMG1025QDEERQ1 achieves this through ultra-fast internal logic and low-propagation-delay output stages.

Does the LMG1025QDEERQ1 support differential input signaling?

No, the LMG1025QDEERQ1 does not support true differential input operation. Although it features both IN+ and IN− pins, they function as independent single-ended inputs feeding an internal AND gate - not a differential pair. IN+ has an internal pull-down resistor and IN− has an internal pull-up resistor; their logic combination determines output state per the truth table in Section 6.4 of the datasheet. Using them as a differential pair is not specified or guaranteed.

How does the split-output architecture (OUTH/OUTL) improve GaN FET performance in the LMG1025QDEERQ1?

The split-output architecture of the LMG1025QDEERQ1 allows independent external resistors on OUTH and OUTL to separately tune turn-on and turn-off slew rates. This directly mitigates gate ringing - a critical failure mode in high-dV/dt GaN switching - by damping oscillations without compromising switching speed. In practice, this enables reliable 7 A/5 A drive into low-Qg GaN devices while maintaining sub-nanosecond timing integrity, as confirmed in application waveforms (Figure 7-8 and Figure 7-9).

Is the thermal pad of the LMG1025QDEERQ1 electrically connected, and how should it be handled in PCB layout?

Yes, the thermal pad of the LMG1025QDEERQ1 is internally connected to GND through the substrate. It must be soldered to a large copper area - typically a dedicated ground plane - using standard WSON reflow guidelines. TI specifies R_θJB = 30.8 °C/W for the DEE package, confirming that thermal pad connection significantly lowers junction-to-board resistance. Failure to properly connect the pad risks exceeding the 150 °C maximum junction temperature during sustained 30 MHz operation.

What protection features are integrated into the LMG1025QDEERQ1, and how do they behave during fault conditions?

The LMG1025QDEERQ1 integrates undervoltage lockout (UVLO) and overtemperature protection (OTP). During UVLO (VDD < 4.0 V), OUTL is actively pulled low to prevent false turn-on of the GaN FET due to insufficient gate drive. During OTP (T_J ≥ 170 °C), the device disables outputs and remains latched off until junction temperature falls below 150 °C (20 °C hysteresis). Both protections are fully qualified per AEC-Q100 and validated in automotive thermal cycling tests.