The FAN4860 is a low-power boost regulator designed to provide a regulated 3.3V or 5V output from a single cell Lithium or Li-Ion battery. Output voltage options are fixed at either 3.3V or 5.0V with a guaranteed maximum load current of 200mA at VIN=2.3V and 300mA at VIN=3.3V. Input current in shut-down mode is less than 1µA, which maximizes battery life. Light-load PFM operation is automatic and “glitch-free”.
The FAN4860 is a low-power boost regulator designed to provide a regulated 3.3V or 5V output from a single cell Lithium or Li-Ion battery. It features an internal synchronous rectifier, eliminating the need for an external diode, and operates with very small external components including a 1µH inductor and 0402 case size capacitors.
The device utilizes Variable On-time Pulse Frequency Modulation (PFM) with a light-load power-saving mode to maintain efficiency. It offers maximum load currents of up to 300mA depending on input voltage conditions and includes protection features such as thermal shutdown, overload protection, and true load disconnect during shutdown.
| Input Voltage Range (5.0V Output) | 2.3V to 4.5V |
|---|---|
| Output Voltage Options | Fixed 3.3V or 5.0V |
| Maximum Load Current (Vin=3.3V, Vout=5V) | 300mA |
| Efficiency | Up to 92% |
| Quiescent Current (No Load) | 37µA |
| Operating Temperature Range | -40°C to +85°C |
The regulator provides fixed output voltages of either 3.3V or 5.0V.
No, it features an internal synchronous rectifier so no external diode is needed.