FEATURES
• Push-Pull Driver for Small Transformers
• Wide range 3 V - 12 V Supply
• High Primary-side Current Drive:
• 5 V Supply: 600 mA (max)
• 3.3 V Supply: 300 mA (max)
• Low Ripple on Rectified Output Permits Small Output Capacitors
• Enable output control
• Soft start and Current limit
• Thermal shutdown
• Small 6-pin SOT23 Package
APPLICATIONS
• Isolated Interface Power Supply for CAN, RS-485, RS-422, RS-232, SPI, I2C, Low-Power LAN
• Industrial Automation
• Process Control
• Medical Equipment

DESCRIPTIONThe PC 6 5 0 5 is a monolithic oscillator/power-driver, specifically designed for small form factor,
isolated power supplies in isolated interface applications. It drives a low-profile, center-tapped transformer primary from a 3V to12 V DC power supply. The secondary can be wound to provide any is
olated voltage based on transformer turns ratio.
The PC6505 consists of an oscillator followed by a gate drive circuit that provides
the complementary output signals to drive the ground referenced N-channel power switches. The
internal logic ensures break-before-make action between the two switches. The enable pin can on
or off output.
The PC6505 is available in a small SOT23-5 package, and is specified for operation at
temperatures from –40°C to 125°C.