ZXGD3105N8TC

ZXGD3105N8TC is a synchronous MOSFET controller. It is designed for driving a MOSFET as an ideal rectifier. This is to replace a diode to increase the power transfer efficiency. Proportional gate drive control monitors the reverse voltage of the MOSFET such that if body diode conduction occurs a positive voltage is applied to the MOSFET’s gate pin. Once the positive voltage is applied to the gate the MOSFET switches on allowing reverse current flow. The controllers’ output voltage is then proportional to the MOSFET drain-source voltage and this is applied to the gate via the driver. This action minimizes body diode conduction while enabling a rapid MOSFET turn-off as the drain current decays to zero. It is used in applications such as low voltage AC- DC adapters, set-top-box, PoE power devices, telecoms PSU, laptop adaptors, computing power supplies - ATX, and server PSU.

• Proportional gate drive to minimize body diode conduction, 25V VCC rating
• Critical conduction mode (CrCM) and continuous mode (CCM), 100V drain voltage rating
• Qualified to AEC-Q101 standards for high reliability, operation upto 500KHz
• Compliant with eco-design directive, 4.5V operation enables low voltage supply
• Quiescent current is 1.56mA typical at (VDRAIN ≥ 0mV, TA = +25°C)
• Gate peak source current is 1.2A typical at (capacitive load: CL = 10nF)
• Gate peak sink current is 5A typical at (capacitive load: CL = 10nF)
• Turn-on propagation delay is 118ns typical at (TA = +25°C)
• Gate rise time is 77ns typical at (TA = +25°C)
• Operating temperature range from -40°C to +150°C, SO-8 package