1 Features
• 650-V 270-mΩ GaN power FET
• 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: 240 μA
• AUX standby quiescent current: 50 μA
• Maximum supply and input logic pin voltage: 26 V
• 8 mm × 5.3 mm QFN package with thermal pad

2 Applications
• AC/DC adapters and chargers
• AC/DC USB wall outlet power supplies
• AC/DC auxiliary power supplies
• Mobile wall charger design
• USB wall power outlet
• Auxiliary-power supplies

3 Description
The LMG3626 is a 650-V 270-mΩ GaN power FET
intended for switch-mode power-supply applications.
The LMG3626 simplifies design and reduces
component count by integrating the GaN FET and
gate driver in a 8-mm by 5.3-mm QFN 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 LMG3626 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), cycleby-
cycle current limit, and overtemperature protection.
Overtemperature protection is reported with the opendrain
FLT pin.