FAN2306 − TinyBuck™ 6 A Integrated Synchronous Buck Regulator


The FAN2306 / FAN2306M are highly efficient integrated TinyBuck™ synchronous buck regulators. They are capable of operating with an input range from 4.5 V to 15 V, supporting 6 A continuous load currents.

These devices utilize Fairchild’s constant on-time control architecture to provide excellent transient response and to maintain a relatively constant switching frequency. The FAN2306 / FAN2306M utilize Pulse Frequency Modulation (PFM) mode to maximize light-load efficiency by reducing switching frequency when the inductor is operating in Discontinuous Conduction Mode (DCM) at light loads. The FAN2306 includes an ultrasonic mode with minimum frequency clamp to keep the switching frequency above the audible range, while the FAN2306M does not include the minimum frequency clamp to maximize efficiency to extremely light loads.

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. After thermal shutdown is activated, a hysteresis feature restarts the device when normal operating temperature is reached.

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Product Status/Pricing/Packaging

Product Product & Eco Status *Pricing Packaging & Packing Info **Package Marking Convention Qualification Support Compliance Certificates
0 FAN2306MPX Full Production
Green as of Mar 2012
$1.31  Details
1.1 x 5.5 x 5.0mm

Line 1:$Y (Fairchild logo)
&Z (Plant Code)
&3 (3-Digit Date Code)
Line 2:FAN23
Line 3:06
ESD (CDM) :  2500  V
ESD (HBM) :  2000  V
RƟJA :  35  °C/W
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  • VIN Range: 4.5 V to 15 V
  • High Efficiency: Over 96% Peak
  • Continuous Output Current: 6 A
  • PFM Mode for Light-Load Efficiency
  • Ultrasonic or No-Ultrasonic Mode Options
  • 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


  • Video Game Console
  • Workstation
  • Storage & Peripherals
  • Set Top Boxes
  • Server & Mainframe
  • Routers & LAN Switches
  • PC Server
  • Other Industrial
  • Other Data Processing
  • Other Consumer Electronics
  • Game Console
  • DVD/Set Top Boxes
  • Consumer
  • Broadband Access

Application Notes

Design Tools

Design Tool Design Tool
ODT-00026 Online Simulation Tool for TinyBuck Family (FAN23xx Devices)
Synchronous Buck Regulator - TinyBuck™ Online Simulation Tool for TinyBuck Family (FAN23xx Devices)

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