November 2012
FAN2108 — TinyBuck™
3-24 V Input, 8 A, High-Efficiency, Integrated
Synchronous Buck Regulator
Features
Description
The FAN2108 TinyBuck™ is a highly efficient, small
footprint, 8 A, synchronous buck regulator.
.
.
.
.
Wide Input Voltage Range: 3 V-24 V
Wide Output Voltage Range: 0.8 V to 80% VIN
8 A Output Current
The FAN2108 contains both synchronous MOSFETs
and a controller/driver with optimized interconnects in
one package, which enables designers to solve high-
current requirements in a small area with minimal
external components.
Programmable Frequency Operation: 200 KHz to
600 KHz
.
.
Over 95% Peak Efficiency
External compensation, programmable switching
frequency, and current limit features allow design
optimization and flexibility.
Integrated Schottky Diode on Low-side MOSFET
Boosts Efficiency
.
.
.
.
.
.
.
.
Internal Bootstrap diode
The summing current mode modulator uses lossless
current sensing for current feedback and over-current
protection. Voltage feedforward helps operation over a
wide input voltage range.
Power-Good Signal
Pre-Bias Startup
Accepts Ceramic Capacitors on Output
External Compensation for Flexible Design
Input Under-Voltage Lockout
Programmable Current Limit
Fairchild’s advanced BiCMOS power process, combined
with low-RDS(ON) internal MOSFETs and a thermally
efficient MLP package, provide the ability to dissipate
high power in a small package.
Under-Voltage, Over-Voltage, and Thermal
Shutdown Protections
Output over-voltage, under-voltage, and thermal
shutdown protections help protect the device from
damage during fault conditions. FAN2108 prevents
pre-biased output discharge during startup in point-of-
load applications.
.
.
Internal Soft-Start
5x6mm, 25-Pin, 3-Pad MLP Package
Applications
Related Application Notes
.
.
.
.
.
.
Servers
AN-8022 — TinyCalc™ Calculator
Point-of-Load Regulation
High-End Computing Systems
Graphics Cards
Battery-Powered Equipment
Set-Top Boxes
Ordering Information
Operating Temperature
Packing
Part Number
Range
Package
Method
FAN2108MPX
-10°C to 85°C
-40°C to 85°C
Molded Leadless Package (MLP) 5x6 mm
Molded Leadless Package (MLP) 5x6 mm
Tape and Reel
Tape and Reel
FAN2108EMPX
© 2008 Fairchild Semiconductor Corporation
FAN2108 • Rev. 1.0.2
www.fairchildsemi.com