The FAN53540 is a 2.4MHz, 5A TinyBuck™ synchronous buck regulator. It has the following features: 2.4MHz fixed-frequency operation, best-in-class load transient response, 5A output current capability, 2.7V to 5.5V input voltage range, adjustable output voltage: 0.8V to VIN•0.9, PFM mode for high efficiency in light load (Forced PWM Available on MODE Pin), 50µA Typical Quiescent Current in PFM Mode, External Frequency Synchronization, Low Ripple Light-Load PFM Mode with Forced PWM Control, Power Good Output, Internal Soft-Start, Input Under-Voltage Lockout (UVLO), Thermal Shutdown and Overload Protection, No External Compensation Required, 20-Bump WLCSP.
The FAN53540 is a step-down switching voltage regulator capable of delivering 5A output current with an input voltage range of 2.7V to 5.5V. It features a proprietary architecture with synchronous rectification and operates at a nominal fixed frequency of 2.4MHz to minimize external component values. The device utilizes Pulse Frequency Modulation (PFM) at moderate and light loads to achieve power-save mode with a typical quiescent current of 50uA, switching to fixed-frequency PWM control at higher loads.
| Output Current | 5A |
|---|---|
| Input Voltage Range | 2.7V to 5.5V |
| Operating Frequency | 2.4MHz |
| Output Voltage Range | 0.8V to Vin*0.9 |
| Quiescent Current (PFM) | 50uA |
| Operating Temperature | -40°C to +85°C |
| Package Type | 20-Bump WLCSP |
The typical quiescent current in PFM mode is 50uA.
The recommended output inductor value is 470nH.
Yes, the device supports external frequency synchronization on the MODE pin.