The AX3304/A integrates Pulse-Width-Modulation (PWM) controlcircuit into a single chip, mainly designs for power-supplyregulator. All the functions include an error amplifier, a soft-start,UVLO, OVP, SCP, TSD circuitry.
This device features an internal 100KHz oscillator (300KHz for "A" version),the UVLO makes sure that the outputs are off until the internalcircuit operates normally.