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.