FAN2315 − TinyBuck™ 15 A Integrated Synchronous Buck Regulator


The FAN2315 TinyBuck™ is a highly efficient integrated synchronous buck regulator. The regulator is capable of operating with an input range from 4.5 V to 15 V and supporting up to 15 A load currents.

The FAN2315 utilizes Fairchild’s constant on-time control architecture to provide excellent transient response and to maintain a relatively constant switching frequency. The 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.

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.

Download Datasheet Buy Products Request Free Samples Product Availability

Product Status/Pricing/Packaging

Product Product & Eco Status *Pricing Packaging & Packing Info **Package Marking Convention Qualification Support Compliance Certificates
0 FAN2315MPX Full Production
Green as of Mar 2012
$1.96  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 3:15
ESD (CDM) :  2500  V
ESD (HBM) :  2000  V
RƟJA :  35  °C/W
Show more...


  • VIN Range: 4.5 V to 15 V
  • High Efficiency: Over 96% Peak
  • Continuous Output Current: 15 A
  • PFM Mode for Light-Load Efficiency
  • 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


  • Desktop PC
  • Game Console
  • Video Game Console
  • Workstation
  • Storage & Peripherals
  • Set Top Boxes
  • Server & Mainframe
  • Routers & LAN Switches
  • PC Server
  • Other Industrial
  • Other Data Processing
  • Other Consumer Electronics
  • 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)

© Copyright Fairchild Semiconductor. All rights reserved. Privacy Policy | Site Terms & Conditions | Standard Terms & Conditions of Sale | Trademarks | Site Map | IPC Saving our world 1mW at a time
  Knowledge Base Support Request Form.
  Slide to enable Submit button:
Locked Unlocked