Texas Instruments LMG1020YFFR

Overview

LMG1020YFFR from Texas Instruments is a single-channel, low-side GaN and logic-level MOSFET gate driver in a 0.8 mm × 1.2 mm WCSP package, delivering 7-A peak source and 5-A peak sink current at 5-V supply. It achieves 2.5-ns typical propagation delay, 1-ns minimum input pulse width, and 400-ps typical rise/fall times-enabling precise nanosecond-scale switching for LiDAR transmitters and time-of-flight laser drivers.

For engineers reviewing the LMG1020YFFR datasheet, LMG1020YFFR pinout, LMG1020YFFR application, or LMG1020YFFR equivalent, key selection criteria include ultra-fast pulse fidelity, split-output drive strength adjustability (via external R_OUTH/R_OUTL), integrated UVLO (4.19 V trip) and OTP (170 °C shutdown), and WCSP layout compatibility with high-frequency GaN power stages.

Technical Context

The LMG1020YFFR implements a Schmitt-trigger input stage with independent IN+ (pull-down) and IN− (pull-up) pins feeding an internal AND gate-supporting both single-ended PWM and differential-like timing control for sub-nanosecond pulse generation. Its asymmetrical output architecture separates OUTH (7-A source) and OUTL (5-A sink) to enable independent gate turn-on/turn-off slew rate tuning.

Designed specifically for enhancement-mode GaN FETs and logic-level silicon MOSFETs, the device operates up to 60 MHz with <4.5 ns max propagation delay variation over −40°C to +125°C. Internal UVLO (4.06–4.33 V with 85-mV hysteresis) and overtemperature protection (170 °C rising edge, 20 °C hysteresis) ensure robust fault handling without external circuitry.

Key Specifications

Pinout & Package

LMG1020YFFR uses a 6-ball Wafer Chip Scale Package (WCSP) with 0.4-mm pitch, optimized for minimal parasitic inductance in high-dI/dt GaN gate loops. The package footprint matches TI's YFF designation and requires microvia-in-pad PCB routing for optimal thermal and electrical performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LMG1020YFFR, LMG1210YFFR delivers faster switching for high-current GaN systems but increases layout sensitivity, while UCC27611DR offers broader voltage range and simpler qualification at the expense of pulse-width fidelity and integrated protection.

Availability

LMG1020YFFR is available at Aetrix Electronics and suitable for LiDAR transmitter modules, time-of-flight camera systems, and Class-E wireless charging designs requiring stable component supply, full traceability, and long-term lifecycle support.

Supply support for LMG1020YFFR 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 high-performance power management solutions, with over 90 years of innovation in signal chain and power delivery technologies.

The LMG1020YFFR belongs to TI's high-speed GaN driver product line, engineered specifically for nanosecond-precision gate control in optical sensing, resonant power conversion, and augmented reality systems.

FAQ

What is the absolute maximum supply voltage for LMG1020YFFR?

The absolute maximum VDD rating for LMG1020YFFR is 5.75 V. Operation above this voltage risks permanent damage. TI specifies a recommended operating range of 4.75 V to 5.4 V, with UVLO activation between 4.06 V and 4.33 V. Exceeding 5.75 V-even transiently-violates absolute maximum ratings and may degrade reliability or cause immediate failure. Always use local 0.1-µF ceramic decoupling placed within 1 mm of the VDD and GND balls.

Can LMG1020YFFR drive both GaN and silicon MOSFETs?

Yes, LMG1020YFFR is explicitly designed to drive both enhancement-mode GaN HEMTs and logic-level silicon MOSFETs. Its 5-V supply, 7-A source/5-A sink capability, and 1-ns minimum pulse width meet the stringent gate drive requirements of modern GaN devices (e.g., EPC2065, GS66508T), while its input thresholds (VIH = 1.7–2.6 V, VIL = 1.1–1.8 V) are compatible with standard 3.3-V or 5-V logic controllers driving silicon FETs like CSD88537.

How does the split-output configuration (OUTH/OUTL) improve system performance in LMG1020YFFR?

The split-output configuration in LMG1020YFFR allows independent external resistors on OUTH and OUTL to separately tune turn-on and turn-off slew rates. This controls gate ringing, reduces EMI, and prevents false triggering in high-dI/dt GaN applications. For example, a smaller resistor on OUTL accelerates turn-off to suppress shoot-through in half-bridge topologies, while a larger OUTH resistor moderates dV/dt to limit capacitive coupling in sensitive LiDAR receivers-directly enabled by LMG1020YFFR's asymmetrical 7-A/5-A drive architecture.

Does LMG1020YFFR include built-in protection features?

Yes, LMG1020YFFR integrates undervoltage lockout (UVLO) with a 4.19-V trip point and 85-mV hysteresis, plus overtemperature protection (OTP) activating at 170 °C with 20 °C hysteresis. During UVLO, OUTL is actively pulled low to prevent unintended gate charge accumulation. These protections operate autonomously without external components-confirmed in Section 7.3.3 and 7.3.4 of the SNOSD45B datasheet-and are critical for reliable operation in unattended LiDAR or wireless charging systems.

What is the thermal resistance (RθJA) of LMG1020YFFR in its YFF package?

The junction-to-ambient thermal resistance (RθJA) of LMG1020YFFR in the 0.8 mm × 1.2 mm WCSP (YFF) package is 133.6 °C/W, as specified in Section 6.4 of the datasheet. This value assumes standard JEDEC 2S2P board conditions. For high-power pulsed operation (e.g., 60-MHz bursts), TI recommends using PCB copper thieving and thermal vias under the package to approach the lower RθJB (38.1 °C/W) and maximize power dissipation headroom without exceeding 125 °C junction temperature.