The UCC37321/2 family of high-speed drivers delivers 9 A of peak drive current in an industry-standard pinout. These drivers can drive the largest of MOSFETs for systems requiring extreme Miller current due to high dV/dt transitions. This eliminates additional external circuits and can replace multiple components to reduce space, design complexity, and assembly cost. Two standard logic options are offered, inverting (UCC37321) and noninverting (UCC37322).

Using a design that inherently minimizes shoot-through current, the outputs of these devices can provide high gate drive current where it is most needed at the Miller plateau region during the MOSFET switching transition. A unique hybrid output stage paralleling bipolar and MOSFET transistors (TrueDrive) allows efficient current delivery at low supply voltages. With this drive architecture, UCC37321/2 can be used in industry standard 6-A, 9-A and many 12-A driver applications. Latch-up and ESD protection circuits are also included. Finally, the UCC37321/2 provides an enable (ENBL) function to have better control of the operation of the driver applications. ENBL is implemented on pin 3, which was previously left unused in the industry-standard pinout. It is internally pulled up to VDD for active-high logic and can be left open for standard operation.

In addition to SOIC-8 (D) package offerings, the UCC37321/2 also comes in the thermally enhanced but tiny 8-pin MSOP PowerPAD (DGN) package. The PowerPAD package drastically lowers the thermal resistance to extend the temperature operation range and improve the long-term reliability.

• Qualified for Automotive Applications
• Industry-Standard Pinout With Addition of Enable Function
• High Peak-Current Drive Capability of ±9 A at the Miller Plateau Region Using TrueDrive Technology
• Efficient Constant-Current Sourcing Using a Unique Bipolar and CMOS Output Stage
• TTL-/CMOS-Compatible Inputs Independent of Supply Voltage
• 20-ns Typical Rise and 15-ns Typical Fall Times With 10-nF Load
• Typical Propagation Delay Times of 25 ns With Input Falling and 35 ns With Input Rising
• 4-V to 15-V Supply Voltage
• Available in Thermally Enhanced MSOP PowerPAD Package With 4.7°C/W θJC
• Rated From –40°C to 125°C
• TrueDrive Output Architecture Using Bipolar and CMOS Transistors in Parallel
• APPLICATIONS
  • Switch-Mode Power Supplies
  • DC/DC Converters
  • Motor Controllers
  • Line Drivers
  • Class-D Switching Amplifiers
  • Pulse Transformer Driver

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