MC33023DW

The MC33023DW from On Semiconductor is a high-speed, fixed-frequency, single-ended pulse width modulator controller optimized for high-frequency operation. It is specifically designed for Off-Line and DC-to-DC converter applications, offering a cost-effective solution with minimal external components. This integrated circuit features an oscillator, a temperature-compensated reference, a wide bandwidth error amplifier, a high-speed current-sensing comparator, and a high-current totem pole output suitable for driving a power MOSFET.

Key features include a 50 ns propagation delay to output, a high current totem pole output, and a wide bandwidth error amplifier. It incorporates fully-latched logic with double pulse suppression and latching PWM for cycle-by-cycle current limiting. The device also offers soft-start control with latched overcurrent reset and input undervoltage lockout with hysteresis. The MC33023DW operates at up to 1.0 MHz and supports voltage or current mode operation.

This controller is housed in a 16-SOIC package and is designed for surface mount applications. It operates within a supply voltage range of 8.4V to 30V and has a maximum duty cycle of 90%. The operating temperature range is -40°C to 105°C (TA). Protective features include current limiting and input undervoltage lockout.