The FAN3268 dual 2A gate driver is optimized to drive a high-side P-channel MOSFET and a low-side N-channel MOSFET in motor control applications operating from a voltage rail up to 18V. The driver has TTL input thresholds and provides buffer and level translation functions from logic inputs. Internal circuitry provides an under-voltage lockout function that prevents the output switching devices from operating if the VDD supply voltage is below the operating level. Internal 100kW resistors bias the non-inverting output low and the inverting output to V_DD to keep the external MOSFETs off during startup intervals when logic control signals may not be present.

The FAN3268 driver incorporates MillerDrive™ architecture for the final output stage. This bipolar-MOSFET combination provides high current during the Miller plateau stage of the MOSFET turn-on / turn-off process to minimize switching loss, while providing rail-to-rail voltage swing and reverse current capability.

The FAN3268 has two independent enable pins that default to on if not connected. If the enable pin for non-inverting channel A is pulled low, OUTA is forced low; if the enable pin for inverting channel B is pulled low, OUTB is forced high. If an input is left unconnected, internal resistors bias the inputs such that the external MOSFETs are off.

• 4.5V to 18V Operating Range
• Drives High-Side PMOS and Low-Side NMOS in Motor Control or Buck Step-down Applications
• Inverting Channel B Biases High-Side PMOS Device Off (with internal 100kW Resistor) when V_DD is below UVLO Threshold
• TTL Input Thresholds
• 2.4A Sink / 1.6A Source at V_OUT=6V
• Internal Resistors Turn Driver Off If No Inputs
• MillerDrive™ Technology
• 8-Lead SOIC Package
• Rated from -40°C to +125°C Ambient

• Motor Control with PMOS / NMOS Half-Bridge Configuration
• Buck Converters with High-Side PMOS Device; 100% Duty Cycle Operation Possible
• Logic-Controlled Load Circuits with High-Side PMOS Switch