FAN5336MPX

FAN5336MPX Application Field and Working Principle

The FAN5336MPX is a step-down DC-DC switch regulator from Diodes Incorporated advertised as a Super-EZBuckTM design. It features a wide input voltage range of 3.2V to 28V and adjustable output voltage range from 0.6V to 20V. This product is ideal for automotive and industrial applications. Furthermore, it provides short-circuit protection, current-limit protection, thermal-shutdown protection, and an externally adjustable soft-start.

Applications

The FAN5336MPX offers many advantages for automotive, transportation, and industrial applications such as:

• Supplies power in automotive and automotive systems
• Power various components of an HVAC system
• Supply power in portable electronic devices
• Switch mode power supplies
• Point-of-load supplies
• Battery powered systems
• LED lighting
• Smart meters
• Wearable electronics

FAN5336MPX Main Features

The FAN5336MPX main features are sumarized in this section:

• Voltage Range: 3.2V to 28V
• Output Voltage Range: 0.6V to 20V
• Integrates fast-start circuit
• Programmable current-limit circuit
• Integrated soft-start circuit
• External operational control pin
• External shutdown control pin
• Thermal-shutdown protection
• Short-circuit and overload protection
• Operates at frequency up to 2MHz
• High efficiency

Working Principle

The FAN5336MPX is a step-down switching regulator design based on buck topology. It has a single switch stage, a built in fast-start circuit, an internal and external adjustable voltage reference, current-limit protection, and thermal and short-circuit protections.

The high frequency operation of the FAN5336 MPX provides fast transient response and low output ripple. A low on-resistance power switch combined with low output current limitation allow for high efficiency in a wide input voltage range. The frequency can be externally adjusted through an external resistor and the duty cycle adjusts automatically based on the output voltage.

The current-limit protection includes an adjustable overcurrent and short-circuit protection. The FAN5336MPX supports an adjustable soft-start that limits inrush current at turn on. The thermal protection helps to protect the FAN5336MPX from excessive temperature, and helps to increase reliability.

Conclusion

The FAN5336MPX is a multifunctional step-down switching regulator, with wide range of applications in automotive, transportation, and industrial areas. It features a wide input voltage range, adjustable output voltage, and multiple protection features. It can operate at frequency up to 2MHz, with high efficiency and fast transient response.