FAN2360 6 A Synchronous Buck Regulator June 2015 FAN2360 10 A Synchronous Buck Regulator Features Description The FAN2360 is a highly efficient synchronous buck V Range: 4.5 V to 24 V IN regulator. The regulator is capable of operating with an High Efficiency: Over 96% Peak input range from 4.5 V to 24 V and supporting up to 10 A continuous load currents. Continuous Output Current: 10 A The FAN2360 utilizes Fairchilds constant on-time MOSFETs R (Typical): HS: 12.2 m, DS,ON control architecture to provide excellent transient LS: 2.88 m response and to maintain a relatively constant switching PFM Mode for Light-Load Efficiency frequency. This device utilizes Pulse Frequency Modulation (PFM) mode to maximize light-load Excellent Line and Load Transient Response efficiency by reducing switching frequency when the Precision Reference: 1% Over Temperature inductor is operating in discontinuous conduction mode at light loads, while clamping the minimum frequency Output Voltage Range: 0.6 to 5.5 V above the audible range with ultrasonic mode. Programmable Frequency: 200 kHz to 1.5 MHz Switching frequency and over-current protection can Programmable Soft-Start be programmed to provide a flexible solution for various applications. Output over-voltage, under- Low Shutdown Current voltage, over-current, and thermal shutdown protections Adjustable Sourcing Current Limit help prevent damage to the device during fault conditions. After thermal shutdown is activated, a Internal Boot Diode hysteresis feature restarts the device when normal Thermal Shutdown operating temperature is reached. Halogen and Lead Free, RoHS Compliant Applications Mainstream Notebooks Servers and Desktop Computers Game Consoles Telecommunications Storage Base Stations Ordering Information Operating Output Part Number Configuration Package Temperature Range Current (A) 34-Lead, PQFN, FAN2360MPX PFM with Ultrasonic Mode -40 to 125C 10 5.5 mm x 5.0 mm 2011 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN2360 Rev. 1.8 FAN2360 10 A Synchronous Buck Regulator Typical Application Diagram V = 5V V = 19V BIAS IN R11 C10 10 C9 2.2F 0.1F CIN CIN 0.1F 3x10F VCC PVCC VIN PVIN Ext C3 EN EN 0.1F V = 1.2V OUT BOOT I =0-10A OUT L1 FAN2360 0.72H SW PGOOD ILIM SOFT START R2 C4 COUT R5 1.62k 1.5k 0.1F 6x47F R3 10k C5 C7 FREQ 100pF 15nF FB R9 54.9k R4 AGND PGND 10k Figure 1. Typical Application Functional Block Diagram VIN BOOT PVIN PVCC PVCC VCC VCC VCC UVLO 0.8V/ 2.0V PVCC EN ENABLE VCC VCC 10A Modulator HS Gate Driver SS FB FB Comparator VREF SW FREQ PFM Control Comparator Logic nd 2 Level Over-Voltage x1.2 Comparator PVCC st 1 Level Over-Voltage x1.1 LS Gate Comparator Driver Under-Voltage x0.9 Comparator PGOOD VCC Thermal 10A Shutdown Current Limit Comparator AGND ILIM PGND Figure 2. Block Diagram 2011 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN2360 Rev. 1.8 2