Rochester Electronics PMIC - Voltage Regulators - DC DC Switching Controllers UCC38084PW

The UCC38084PW is a BiCMOS pulse width modulation (PWM) controller designed for DC-DC or off-line fixed-frequency current-mode switching power supplies. It features a dual output stage configured for push-pull topology, with both outputs switching at half the oscillator frequency. The device includes programmable slope compensation, an internal soft-start function with a typical interval of 3.5 ms, and cycle-by-cycle current limiting. The UCC38084PW operates with a low start-up current of 120 µA and a typical run current of 1.5 mA. It has undervoltage lockout with hysteresis, ensuring reliable operation. The device supports a wide oscillator frequency range from 50 kHz to 1 MHz, allowing flexibility in design. It is available in multiple package options, including 8-pin TSSOP, SOIC, and PDIP, making it suitable for various applications such as high-efficiency switch-mode power supplies and telecom DC-DC converters. Engineers considering the UCC38084PW should note its specific turn-on and turn-off thresholds of 4.3 V and 4.1 V, respectively, and its capability to drive a high-current totem-pole output stage with 1 A sink and 0.5 A source capability.