Fairchild Fan2103 Data Handbook
Summary
The FAN2103 is a high-performance 3A synchronous buck regulator designed for power-dense applications requiring robust and highly efficient voltage conversion. This manual is an essential resource for electrical engineers and hardware designers, providing comprehensive technical specifications, detailed pinouts, performance curves, and design guidelines (including the TinyCalc tool). It supports demanding point-of-load regulation across a wide input range (3V to 24V), making it ideal for use in servers, battery-powered equipment, set-top boxes, and graphics cards that require miniature footprint solutions with minimal external components.
Page 1 Text Content
2103 — in y B ck™ 3A , 24V In t, In teg rated yn ch ro s B ck R eg lato
September 2011
FAN2103 — Tiny Buck™ 3A, 24V Input, Integrated Synchronous Buck Regulator
Features Description
3A Output Current The FAN2103 Tiny Buck™ is an easy-to-use, cost- and space-efficient, 3A synchronous buck solution. It
Over 95% Efficiency
enables designers to solve high current requirements in Fully Synchronous Operation with Integrated a small area with minimal external components.
Schottky Diode on Low-side MOSFET Boosts
External compensation, programmable switching
Efficiency
frequency, and current limit features allow for design Programmable Frequency Operation (200KHz to optimization and flexibility.
600KHz)
The summing current mode modulator uses lossless Power-good Signal current sensing for current feedback and over-current, and includes voltage feedforward.
Accepts Ceramic Capacitors on Output
Fairchild’s advanced Bi CMOS power process, combined
External Compensation for Flexible Design
with low RDS(ON) internal MOSFETs and a thermally Wide Input Range: 3V to 24V efficient MLP package provide the ability to dissipate high power in a small package.
Output Voltage Range: 0.8V to 90%VIN
Output over-voltage, under-voltage, and thermal
Input Under-Voltage Lockout
shutdown protections plus power-good, help protect the Programmable Over-Current Limit devices from damage during fault conditions.
Under-Voltage, Over-Voltage, and
Thermal Protections Related Application Notes
5x6mm, 25-pin, 3-Pad MLP Tiny Calc™ Design Tool
AN-6033 — Tiny Calc™ Design Tool Guide
Applications
AN-5067 – PCB Land Pattern Design and Surface
Graphics Cards Mount Guidelines for MLP Packages Battery-powered Equipment Set-top Boxes Point-of-load Regulation Servers
Ordering Information
Operating
Part Number Package Packing Method
Temperature Range
FAN2103MPX -10°C to 85°C 25-Pin Molded Leadless Package (MLP) 5x6mm Tape and Reel FAN2103EMPX -40°C to 85°C 25-Pin Molded Leadless Package (MLP) 5x6mm Tape and Reel
© 2007 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN2103 • Rev. 1.0.7
Page Summary Contents For Fairchild Fan2103 Data Handbook
Manual Details
| Brand | Fairchild |
|---|---|
| Pages | 14 |
| File Size | 756.49 KB |
| Published | May 28, 2026 |
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