ON Semiconductor


6 A Synchronous Buck Regulator

Topology: Buck
Input Voltage (min.): 19.00 V
Input Voltage (max.): 19.00 V
Switching Frequency (min.): 200.00 kHz
Switching Frequency (max.): 1500.00 kHz
Output 1: 1.20 V / 6.000 A

Original publication on 2015-09-01, revision 1.11


The FAN23SV56 TinyBuck™ is a highly efficient integrated synchronous buck regulator. The regulator is capable of operating with an input range from 7 V to 24 V and supporting 6 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 FAN23SV56 utilizes Fairchild’s constant on-time control architecture to provide excellent transient response and maintain a relatively constant switching frequency. Pulse Frequency Modulation (PFM) Mode maximizes light-load efficiency by reducing switching frequency when the inductor is operating in Discontinuous Conduction Mode (DCM) 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, under-voltage, over-current, and thermal shutdown protections help prevent damage to the device during fault conditions. A hysteresis feature restarts the device when normal operating temperature is reached.


  • VIN Range: 7 V to 24 V Using Internal Linear Regulator for Bias
  • VIN Range: 4.5 V to 5.5 V with VIN/PVIN/PVCC Connected to Bypass Internal Regulator
  • High Efficiency: Over 96% Peak
  • Continuous Output Current: 6 A
  • Accurate Enable Facilitates VIN 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 1.5 MHz
  • Programmable Soft-Start
  • Low Shutdown Current
  • Adjustable Sourcing Current Limit
  • Internal Boot Diode
  • Thermal Shutdown
  • Halogen and Lead Free, RoHS Compliant


  Order Code SPEC Product series L
Material Version Samples
744325120 PDF WE-HCI SMT Flat Wire High Current Inductor 1.2 20 1 25 1.8 75 Superflux SMT

Other applications and Würth Elektronik products for this IC

  • FAN23SV56
    Topology: Buck, Input Voltage (min.): 7.00 V, Input Voltage (max.): 24.00 V, Switching Frequency (min.): 200.00 kHz, Switching Frequency (max.): 1500.00 kHz, Output 1: 5.50 V / 6.000 A