Fairchild Fan8301 Product Specification Sheet
Summary
Achieve stable power delivery with this high-efficiency, non-synchronous step-down DC/DC buck regulator. Capable of providing 2A at voltages ranging from 4.75V to 16V, it is ideal for complex electronics requiring reliable power management and robust protection against overcurrent and thermal events. This resource provides complete engineering specifications, including detailed electrical ratings, pin definitions (SOIC-8 package), operational diagrams, and application guidance. It is designed for embedded systems engineers developing consumer appliances, set-top boxes, DSL/Cable modems, and distributed power solutions.
Page 1 Text Content
FA 8301 — 2A , 16V, N on-Synchronous, Step-D ow n, D /D egulator
November 2008
FAN8301 2A, 16V, Non-Synchronous, Step-Down, DC/DC Regulator Features Description
2A Output Current The FAN8301 is a monolithic, non-synchronous, step- down (buck) regulator with internal power MOSFETs. It
0.22Ω Internal Power MOSFET Switch
achieves 2A continuous output current over a wide input supply range with excellent load and line regulation.
Wide 4.75V to 16V Operating Input Range
Current-mode operation provides fast transient
Output Adjustable from 0.6 to 14V response and eases loop stabilization. Fault condition
protection includes cycle-by-cycle current limiting and
Stable with Low-ESR Output Ceramic Capacitors
thermal shutdown. The regulator draws less than 20µA
Up to 90% Efficiency shutdown current. The FAN8301 requires a minimum
number of readily available standard external
Less than 20µA Shutdown Current
components.
Fixed 370k Hz Frequency
External compensation, enable, and programmable
Thermal Shutdown with Hysteresis soft-start features allow design optimization and
flexibility. Cycle-by-cycle current limit, frequency
Cycle-by-Cycle Over-Current Protection
foldback, and thermal shutdown provide protection
Available in 8-Pin SOIC Package against shorted outputs.
Applications Set-Top Boxes DSL and Cable Modems Distributed Power Systems Consumer Appliances (DVD) Auxiliary Supplies
Figure 1. Typical Application
Ordering Information
Part Number Operating
Temperature Range Package Eco Status Packing Method
FAN8301MX -40°C to +85°C 8-SOIC Ro HS Reel
For Fairchild’s definition of “green” Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html.
© 2008 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN8301 • Rev. 1.0.0
Page Summary Contents For Fairchild Fan8301 Product Specification Sheet
Manual Details
| Brand | Fairchild |
|---|---|
| Pages | 12 |
| File Size | 612.16 KB |
| Published | May 30, 2026 |
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Frequently Asked Questions
What is the maximum continuous output current?
The FAN8301 supports 2A continuous output current.
What input components are needed for proper operation?
The VIN pin requires close decoupling using a 10µF ceramic capacitor or larger.
How do I activate and deactivate the regulator circuit?
Drive the EN pin HIGH to turn it on, and drive it LOW to turn it off.
What protection features does this DC/DC regulator include?
It includes cycle-by-cycle current limiting, thermal shutdown, and over-current protection.