FAN2103 Datasheet, PDF (1/14 Pages) Fairchild Semiconductor – 3A, 24V Input Integrated Synchronous Buck Regulator

December 2007
FAN2103 — TinyBuck™
3A, 24V Input Integrated Synchronous Buck Regulator
Features
ƒ Over 95% efficiency
ƒ Internal power MOSFETs:
High-side RDS(ON) = 31mΩ
Low-side RDS(ON) = 23mΩ
ƒ Integrated low-side Schottky diode
ƒ Programmable frequency operation up to 750KHz
ƒ Power-good signal
ƒ Wide input range: 3.0V to 24V
ƒ Output voltage range: 0.8V to 90%VIN
ƒ Input under-voltage lockout (UVLO)
ƒ Programmable over-current protection
ƒ Under-voltage, over-voltage, and thermal protection
ƒ Selectable light-load power-saving mode
ƒ 5x6mm, 25-pin, 3-pad MLP
Applications
ƒ Thin and light Notebook PCs
ƒ Graphics cards
ƒ Battery-powered equipment
ƒ Set-top box
ƒ Point-of-load regulation
Description
The FAN2103 TinyBuck™ is an easy-to-use, cost- and
space-efficient, synchronous buck solution. It enables
designers to solve high-current requirements in a small
area with minimal external components.
External programming of clock frequency, current limit,
and loop response allows for optimization and flexibility
selecting output filter components and transient response.
The summing current mode modulator uses lossless
current sensing for current feedback and over-current,
and includes voltage feedforward.
Fairchild’s advanced BiCMOS power process,
combined with a thermally efficient MLP package,
provides low-RDS(ON), internal MOSFETs, and the ability
to dissipate high power in a small package.
Under-voltage, thermal shutdown, and power-good are
blanked at start-up, but protect the device from damage
during fault conditions.
Related Application Notes
ƒ AN-5067 – PCB land pattern design and surface
mount guidelines for MLP packages
Ordering Information
Part Number
FAN2103MPX
FAN2103EMPX
Operating
Temperature Range
Package
Packing Method
-10°C to 85°C
-40°C to 85°C
25-Pin Molded Leadless Package (MLP) 5x6mm Tape and Reel
25-Pin Molded Leadless Package (MLP) 5x6mm Tape and Reel
All packages are lead free per JEDEC: J-STD-020B standard.
© 2007 Fairchild Semiconductor Corporation
FAN2103 Rev. 1.0.3
www.fairchildsemi.com