4A peak drive — what it buys the switching stage
The UCC27323DR is a dual low-side MOSFET driver from TI that delivers 4A peak source and 4A peak sink current. That 4A rating means it can slam the gate of a 10 nC MOSFET on in about 2.5 ns (theoretically) — in practice, the 20 ns typical rise time and 15 ns fall time set the real edge rate. For a 12V gate-drive rail, the 4.5V to 15V supply range covers the common bias voltages used in industrial and telecom power supplies.
Inverting inputs and independent channels
Both channels are inverting — a logic high on the input turns the output low, and vice versa. The two channels are independent, so you can drive two separate MOSFETs with different duty cycles or phase shifts, or parallel them for higher peak current into a single gate. The logic thresholds are 1V VIL and 2V VIH, compatible with 3.3V and 5V logic families without level shifting.
Military temperature range — not just a datasheet number
Rated for junction temperature from -55°C to 150°C, this driver is specified for the full military temperature envelope. The 8-SOIC package is standard surface-mount, so it fits on a four-layer board with a thermal pad pour under the body.
TI lists the UCC27323DR as Active.