FAN23SV65 15 A Synchronous Buck Regulator June 2015 FAN23SV65 15 A Synchronous Buck Regulator Description Features The FAN23SV65 is a highly efficient synchronous buck V Range: 7 V to 24 V Using Internal Linear IN regulator. The regulator is capable of operating with an Regulator for Bias input range from 7 V to 24 V and supporting up to 15 A V Range: 4.5 V to 5.5 V with V /P /P IN IN VIN VCC continuous load currents. The device can operate from Connected to Bypass Internal Regulator a 5 V rail (10%) if V , P , and P are connected IN VIN VCC together to bypass the internal linear regulator. High Efficiency: Over to 96% Peak The FAN23SV65 utilizes Fairchilds constant on-time Continuous Output Current: 15 A control architecture to provide excellent transient MOSFETs R (Typical): HS: 6.46 m, DS,ON response and to maintain a relatively constant switching LS: 1.58 m frequency. This device utilizes Pulse Frequency Internal Linear Bias Regulator Modulation (PFM) mode to maximize light-load efficiency by reducing switching frequency when the Accurate Enable Facilitates V UVLO Functionality IN inductor is operating in discontinuous conduction mode PFM Mode for Light-Load Efficiency at light loads, while clamping the minimum frequency above the audible range with ultrasonic mode. Excellent Line and Load Transient Response Precision Reference: 1% Over Temperature Switching frequency and over-current protection can be programmed to provide a flexible solution for Output Voltage Range: 0.6 to 5.5 V various applications. Output over-voltage, under- Programmable Frequency: 200 kHz to 1 MHz voltage, over-current, and thermal shutdown protections help prevent damage to the device during fault Programmable Soft-Start conditions. After thermal shutdown is activated, a Low Shutdown Current hysteresis feature restarts the device when normal operating temperature is reached. Adjustable Sourcing Current Limit Internal Boot Diode Thermal Shutdown 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 Temperature Package Current (A) Range 34-Lead, PQFN, 5.5 mm x FAN23SV65MPX PFM with Ultrasonic Mode -40 to 125C 15 5.0 mm 2011 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN23SV65 Rev. 1.9 FAN23SV65 15A Synchronous Buck Regulator Typical Application Diagrams V = 19V IN V = 19V IN R11 C10 10 C9 2.2F 0.1F CIN CIN R7 0.1F 4x10F 64.9k PVCC VIN PVIN VCC Ext C3 EN EN 0.1F R8 V = 1.2V OUT 10k BOOT FAN23SV65 I =0-15A R7, R8 used for Accurate EN OUT L1 R7, R8 open for Ext EN 0.56H SW PGOOD ILIM SOFT-START R2 C4 COUT R5 1.47k 1.5k 0.1F 8x47F R3 10k C5 C7 FREQ 100pF 15nF FB R9 54.9k R4 AGND PGND 10k Figure 1. Typical Application with V = 19 V IN V = 5V IN R11 C10 10 C9 2.2F 0.1F CIN CIN 0.1F 4x10F VCC PVCC VIN PVIN Ext C3 EN EN 0.1F V = 1.2V OUT BOOT FAN23SV65 I =0-15A L1 OUT 0.56H SW PGOOD SOFT-START ILIM R2 C4 COUT R5 1.47k 1.5k 0.1F 8x47F R3 10k C5 C7 FREQ 100pF 15nF FB R9 R4 54.9k AGND PGND 10k Figure 2. Typical Application with V = 5 V IN 2011 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN23SV65 Rev. 1.9 2