FAN23SV65AMPX: 15 A Synchronous Buck Regulator

The FAN23SV65AMPX is a highly efficient synchronous buck regulator. The regulator is capable of operating with an input range from 7 V to 24 V and supporting up to 15 A continuous load currents. The device can operate from a 5 V rail (±10%) if VIN, PVIN, and PVCC are connected together to bypass the internal linear regulator.

The FAN23SV65A utilizes Fairchild’s constant on-time control architecture to provide excellent transient response and to maintain a relatively constant switching frequency. This device utilizes Pulse Frequency Modulation (PFM) mode to maximize light-load efficiency by reducing switching frequency when the inductor is operating in discontinuous conduction mode at light loads, while clamping the minimum frequency above the audible range with ultrasonic mode.

Switching frequency and over-current protection can be programmed to provide a flexible solution for various applications. Output over-voltage, undervoltage, over-current, and thermal shutdown protections help prevent damage to the device during fault conditions. After thermal shutdown is activated, a hysteresis feature restarts the device when normal operating temperature is reached.

Features

• VIN Range: 7 V to 24 V Using Internal Linear
• VIN Range: 4.5 V to 5.5 V with V_IN/P_VIN/P_VCC
• High Efficiency: Over to 96% Peak
  
• Continuous Output Current: 15 A
  
• Internal Linear Bias Regulator
  
• Accurate Enable Facilitates V_IN UVLO Functionality
  
• PFM Mode for Light-Load Efficiency
  
• Excellent Line and Load Transient Response
  
• Precision Reference: ±1% Over Temperature
  
• Output Voltage Range: 0.6 to 5.5 V
  
• Programmable Frequency: 200 kHz to 1 MHz
  
• Programmable Soft-Start
  
• Low Shutdown Current
  
• Adjustable Sourcing Current Limit
  
• Internal Boot Diode
  
• Thermal Shutdown
  
• Halogen and Lead Free, RoHS Compliant