1 Features
• GaN power FET: 700V, 155mΩ,
• Integrated gate driver with low propagation delays
and adjustable turn-on slew-rate control
• Current-sense emulation with high bandwidth and
high accuracy
• Cycle-by-cycle overcurrent protection
• Overtemperature protection with FLT pin reporting
• AUX quiescent current: 240μA
• AUX standby quiescent current: 50μA
• Maximum supply and input logic pin voltage: 26V
• 8mm × 5.3mm QFN package with thermal pad

2 Applications
• AC/DC adapters and chargers
• Mobile wall charger design
• USB wall power outlet
• Auxiliary-power supplies
• SMPS power supply for TV
• LED Power Supply

3 Description
The LMG3624 is a 700V 155mΩ GaN power FET
intended for switch-mode power-supply applications.
The LMG3624 simplifies design and reduces
component count by integrating the GaN FET and
gate driver in a 8mm × 5.3mm VQFN package.
Programmable turn-on slew rates provide EMI and
ringing control. The current-sense emulation reduces
power dissipation compared to the traditional currentsense
resistor and allows the low-side thermal pad to
be connected to the cooling PCB power ground.
The LMG3624 supports converter light-load efficiency
requirements and burst-mode operation with low
quiescent currents and fast start-up times. Protection
features include under-voltage lockout (UVLO),
cycle-by-cycle current limit , and overtemperature
protection. Overtemperature protection is reported
with the open-drain FLT pin.