QX2305 is a high efficiency, high precision boost DC-DC control chip. Built-in high-precision error amplifier, fixed off-time control circuit, PWM comparator, peak current limiting circuit, power tube drive circuit, etc., especially suitable for boost applications with wide voltage input.

QX2305 uses a fixed off-time control method, and its operating frequency can be up to 1MHz, which can reduce the volume of external inductors and filter capacitors, improve efficiency, and save PCB area. The shutdown time is at least 620ns, and can be adjusted by external capacitors, and the operating frequency can also be adjusted according to user requirements.

Because the system adopts the current mode control mode, it has a fast transient response speed to the input bus voltage changes and load transients.

The chip has cycle-by-cycle current limit protection and output voltage overvoltage protection.

QX2305 is available in SOP8 package.