• Push-pull driver for small transformers

• Single 3.3-V or 5-V supply

• High primary-side current drive:

• 5-V Supply: 350 mA (Max)

• 3.3-V Supply: 150 mA(Max)

• Low ripple on rectified output permits smalloutput capacitors

• Small 5-Pin SOT-23 Package

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The SN6501 is a monolithic oscillator/power-driver, specifically designed for small formfactor, isolated power supplies in isolated interface applications. The device drives alow-profile, center-tapped transformer primary from a 3.3-V or 5-V DC power supply. The secondarycan be wound to provide any isolated voltage based on transformer turns ratio.

The SN6501 consists of an oscillator followed by a gate drive circuit that provides thecomplementary output signals to drive the ground referenced N-channel power switches. The internallogic ensures break-before-make action between the two switches.

The SN6501 is available in a small SOT-23 (5) package, and is specified for operation attemperatures from –40°C to 125°C.