The UCC27423P is a dual low-side MOSFET driver from TI, delivering 4 A peak source and 4 A peak sink per channel. That current rating is the key spec for driving the gate capacitance of large N-channel or P-channel MOSFETs: a 4 A peak can charge a 10 nC gate in roughly 2.5 ns, though the 20 ns rise time sets the practical floor. The driver operates from a 4 V to 15 V supply rail, which covers the standard bias voltages for 5 V and 12 V gate drives used in synchronous rectifiers, buck converters, and push-pull stages. Both channels are independent with inverting inputs, meaning the output goes high when the input is low. This simplifies the interface with controllers that deliver a complement signal, and the two channels can be staggered for interleaved or half-bridge topologies without external logic.
Low-side only — no bootstrap, no floating supply
The driven configuration is low-side, so the source of the external MOSFET connects to ground (or the negative rail). For a half-bridge the high-side MOSFET needs a bootstrap or isolated supply; the UCC27423P drives the low-side FET directly. The gate type covers both N-channel and P-channel MOSFETs, so it can handle a P-channel high-side if the source is connected to the positive rail (then the driver's ground is the source node, which is not the system ground — verify the common-mode range). The inverting input logic means a low input turns the output on — plan the controller's output polarity accordingly. The independent channel type allows one channel to be used for a primary switch and the second for an active clamp or synchronous rectifier, with separate timing control.
Package and temperature grade — through-hole, wide range
Housed in an 8-PDIP (0.300", 7.62 mm) through-hole package, the UCC27423P is suited for prototyping, rework-friendly designs, and low-volume production where a socket is preferred.
TI lists the UCC27423P as Active. The base product number UCC27423 indicates the family includes variants with non-inverting inputs (UCC27424) and dual-input (UCC27425) — if your prototype needs the opposite polarity, the leadframe and footprint are the same across the 8-pin DIP package, making a drop-in swap possible without a board change.