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Fairchild Semiconductor Electronic Components Datasheet

FAN21SV04 Datasheet

24V Single-Input Integrated Synchronous Buck Regulator

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August 2009
FAN21SV04 — TinyBuck™ 4A, 24V Single-Input
Integrated Synchronous Buck Regulator
Features
ƒ Single-Supply Operation with 4A Output Current
ƒ Wide Input Range with Dual Supply: 3.0V to 24V
ƒ Wide Output Voltage Range: 0.8V to 80% VIN
ƒ Over 94% Peak Efficiency
ƒ 1% Reference Accuracy Over Temperature
ƒ Fully Synchronous Operation with Integrated
Schottky Diode on Low-Side MOSFET Boosts
Efficiency
ƒ Single Supply Device for VIN > 6.5V – 24V
ƒ Programmable Frequency Operation (200-
600KHz)
ƒ Synchronizable to External Clock with
Master/Slave Provisions
ƒ Power-Good Signal
ƒ Accepts Ceramic Capacitors on Output
ƒ External Compensation for Flexible Design
ƒ Starts on Pre-Bias Outputs
ƒ Integrated Bootstrap Diode
ƒ Programmable Over-Current Protection
ƒ Under-Voltage, Over-Voltage, and Thermal-
www.DataSheet4SUh.cuotmdown Protections
ƒ 5x6mm, 25-Pin, 3-Pad MLP Package
Applications
ƒ Servers & Telecom
ƒ Graphics Cards & Displays
ƒ Computing Systems
ƒ Set-Top Boxes & Game Consoles
ƒ Point-of-Load Regulation
Description
The FAN21SV04 TinyBuck™ is a highly efficient,
small-footprint, programmable-frequency, 4A,
integrated synchronous buck regulator.
FAN21SV04 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, thereby reducing cost. On-
board internal 5V regulator enables single-supply
operation for input voltages >6.5V.
The FAN21SV04 can be configured to drive multiple
slave devices OR synchronize to an external system
clock. In slave mode, FAN21SV04 may be set up to
be free-running in the absence of a master clock
signal.
External compensation, programmable switching
frequency, and current-limit features allow for design
optimization and flexibility. High-frequency operation
allows for all-ceramic solutions.
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. Integration
helps minimize critical inductances, making layout
simpler and more efficient compared to discrete
solutions.
Output over-voltage, under-voltage, over-current, and
thermal-shutdown protections help protect the device
from damage during fault conditions. FAN21SV04
prevents pre-biased output discharge during startup
in point-of-load applications.
Related Application Notes
AN-8022 — TinyCalc™ Calculator
Ordering Information
Operating
Eco
Part Number Temperature Range Status
Package
Packing
Method
FAN21SV04MPX
FAN21SV04EMPX
-10°C to 85°C
-40°C to 85°C
Green Molded Leadless Package (MLP) 5x6mm Tape and Reel
Green Molded Leadless Package (MLP) 5x6mm Tape and Reel
For Fairchild’s definition of Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html.
© 2009 Fairchild Semiconductor Corporation
FAN21SV04 • Rev. 1.0.1
www.fairchildsemi.com


Fairchild Semiconductor Electronic Components Datasheet

FAN21SV04 Datasheet

24V Single-Input Integrated Synchronous Buck Regulator

No Preview Available !

Typical Application Diagram
Block Diagram
www.DataSheet4U.com
Figure 1. Typical Application as Master at VIN=6.5V to 24V
© 2009 Fairchild Semiconductor Corporation
FAN21SV04 • Rev. 1.0.1
Figure 2. Block Diagram
2
www.fairchildsemi.com


Part Number FAN21SV04
Description 24V Single-Input Integrated Synchronous Buck Regulator
Maker Fairchild Semiconductor
Total Page 18 Pages
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