Dual low-side driver for hard-switched N-channel MOSFETs
The SM72482MA-4/NOPB is a dual-channel, independent low-side gate driver from Texas Instruments, designed to drive N-channel MOSFETs in hard-switched topologies. Each channel delivers 3 A source and 5 A sink peak output current, which means the gate capacitance of a typical power MOSFET in the 10-50 nC range charges and discharges in under 20 ns — keeping the Miller plateau duration short and the switching losses low.
Switching speed and drive strength for loss budget
Typical rise and fall times of 14 ns and 12 ns respectively, measured into a standard test load, set the floor for the minimum achievable switching transition. In a 500 kHz buck converter, the 26 ns total transition time represents about 1.3 % of the switching period — the driver itself does not become the bottleneck for frequency scaling. This simplifies the interface from a PWM controller or microcontroller to the power stage. Supply voltage range spans 3.5 V to 14 V, covering common bias rails from 5 V to 12 V in industrial and automotive power supplies.
Package and PCB integration
Housed in the 8-pin SOIC narrow-body package (3.90 mm width, 1.27 mm pitch), the SM72482MA-4/NOPB uses the same footprint as hundreds of other logic and driver ICs. The supplier device package is 8-SOIC, which matches the standard SOIC-8 land pattern with a 4.9 mm body length. No thermal pad is exposed — the junction-to-ambient thermal resistance relies on the PCB copper area connected to the GND pins.
The part is ROHS3 compliant (EU RoHS exemption-free), which eliminates the risk of future compliance-driven obsolescence for designs shipping into EU or China RoHS markets.