The FAN8303 is a monolithic, non-synchronous, step-down (buck) regulator with internal power MOSFETs. It achieves 2A continuous output current over a wide input supply range with excellent load and line regulation. Current-mode operation provides fast transient response and eases loop stabilization. Fault condition protection includes cycle-by-cycle current limiting and thermal shutdown. The regulator draws less than 40µA shutdown current. FAN8303 requires a minimum number of readily available standard external components. External compensation, enable, and programmable soft-start features allow design optimization and flexibility. Cycle-by-cycle current limit, frequency foldback, and thermal shutdown provide protection against shorted outputs.
The FAN8303 is a monolithic, non-synchronous, step-down (buck) regulator with an internal 0.22Ω power MOSFET switch. It is designed to achieve 2A continuous output current over a wide input supply range of 5V to 23V. The device features current-mode operation for fast transient response and includes protection features such as cycle-by-cycle over-current protection and thermal shutdown with hysteresis.
| Output Current | 2A |
|---|---|
| Input Voltage Range | 5V to 23V |
| Output Voltage Range | 0.6 to 20V |
| Efficiency | Up to 90% |
| Shutdown Current | Less than 40µA |
| Oscillator Frequency | 370kHz |
| Operating Temperature Range | -40°C to +85°C |
| Package | 8-Pin SOIC |
The FAN8303 achieves 2A continuous output current.
The device operates with a wide input supply range from 5V to 23V.
Yes, it includes cycle-by-cycle over-current protection.
The regulator has a fixed oscillator frequency of 370kHz.