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FAN5354_11

Description
5.5 A SWITCHING REGULATOR, 3300 kHz SWITCHING FREQ-MAX, PDSO12
Categorysemiconductor    Analog mixed-signal IC   
File Size1MB,15 Pages
ManufacturerFairchild
Websitehttp://www.fairchildsemi.com/
Download Datasheet Parametric Compare View All

FAN5354_11 Overview

5.5 A SWITCHING REGULATOR, 3300 kHz SWITCHING FREQ-MAX, PDSO12

FAN5354_11 Parametric

Parameter NameAttribute value
Number of functions1
Number of terminals12
Rated input voltage5 V
Maximum limit input voltage5.5 V
Minimum limit input voltage2.7 V
Maximum operating temperature85 Cel
Minimum operating temperature-40 Cel
Processing package description3 X 3.50 MM, GREEN, MO-229WFED-2, MLP-12
Lead-freeYes
EU RoHS regulationsYes
stateACTIVE
packaging shapeRECTANGULAR
Package SizeSMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE
surface mountYes
Terminal formNO LEAD
Terminal spacing0.5000 mm
terminal coatingNICKEL PALLADIUM GOLD
Terminal locationDUAL
Packaging MaterialsPLASTIC/EPOXY
Temperature levelINDUSTRIAL
Control TechnologyPULSE WIDTH MODULATION
Maximum output current5.5 A
Analog IC other typesSWITCHING REGULATOR
Switch configurationBUCK
Maximum switching frequency3300 kHz
FAN5354 — 3MHz, 3A Synchronous Buck Regulator
March 2011
FAN5354
3MHz, 3A Synchronous Buck Regulator
Features
3MHz Fixed-Frequency Operation
Best-in-Class Load Transient
3A Output Current Capability
2.7V to 5.5V Input Voltage Range
Adjustable Output Voltage: 0.8 to V
IN
•0.9
PFM Mode for High Efficiency in Light Load (Forced PWM
Available on MODE Pin)
Minimum PFM Frequency Avoids Audible Noise
270 A Typical Quiescent Current in PFM Mode
External Frequency Synchronization
Low Ripple Light-Load PFM Mode with Forced
PWM Control
Power Good Output
Internal Soft-Start
Input Under-Voltage Lockout (UVLO)
Thermal Shutdown and Overload Protection
12-Lead 3x3.5mm MLP
Description
The FAN5354 is a step-down switching voltage regulator that
delivers an adjustable output from an input voltage supply of
2.7V to 5.5V. Using a proprietary architecture with
synchronous rectification, the FAN5354 is capable of
delivering 3A at over 85% efficiency, while maintaining a
very high efficiency of over 80% at load currents as low as
2mA. The regulator operates at a nominal fixed frequency of
3MHz, which reduces the value of the external components
to 470nH for the output inductor and 10 F for the output
capacitor. Additional output capacitance can be added to
improve regulation during load transients without affecting
stability and inductance up to 1.2 H may be used with
additional output capacitance.
At moderate and light loads, pulse frequency modulation
(PFM) is used to operate the device in power-save mode
with a typical quiescent current of 270 A. Even with such a
low quiescent current, the part exhibits excellent transient
response during large load swings. At higher loads, the
system automatically switches to fixed-frequency control,
operating at 3MHz. In shutdown mode, the supply current
drops below 1 A, reducing power consumption. PFM mode
can be disabled if constant frequency is desired. To avoid
audible noise, the regulator limits its minimum PFM
frequency. The FAN5354 is available in 12-lead 3x3.5mm
MLP package.
Applications
Set-Top Box
Hard Disk Drive
Communications Cards
DSP Power
Figure 1. Typical Application
Ordering Information
Part Number
FAN5354MPX
Temperature Range
-40 to 85°C
Package
MLP-12, 3x3.5mm
Packing Method
Tape and Reel
© 2009 Fairchild Semiconductor Corporation
FAN5354 • Rev. 1.0.5
www.fairchildsemi.com

FAN5354_11 Related Products

FAN5354_11 FAN5354MPX FAN5354
Description 5.5 A SWITCHING REGULATOR, 3300 kHz SWITCHING FREQ-MAX, PDSO12 5.5 A SWITCHING REGULATOR, 3300 kHz SWITCHING FREQ-MAX, PDSO12 5.5 A SWITCHING REGULATOR, 3300 kHz SWITCHING FREQ-MAX, PDSO12
Number of functions 1 1 1
Number of terminals 12 12 12
Maximum operating temperature 85 Cel 85 °C 85 Cel
Minimum operating temperature -40 Cel -40 °C -40 Cel
surface mount Yes YES Yes
Terminal form NO LEAD NO LEAD NO LEAD
Terminal location DUAL DUAL DUAL
Temperature level INDUSTRIAL INDUSTRIAL INDUSTRIAL
Control Technology PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION
Maximum output current 5.5 A 5.5 A 5.5 A
Switch configuration BUCK BUCK BUCK
Maximum switching frequency 3300 kHz 3300 kHz 3300 kHz
Rated input voltage 5 V - 5 V
Maximum limit input voltage 5.5 V - 5.5 V
Minimum limit input voltage 2.7 V - 2.7 V
Processing package description 3 X 3.50 MM, GREEN, MO-229WFED-2, MLP-12 - 3 X 3.50 MM, GREEN, MO-229WFED-2, MLP-12
Lead-free Yes - Yes
EU RoHS regulations Yes - Yes
state ACTIVE - ACTIVE
packaging shape RECTANGULAR - RECTANGULAR
Package Size SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE - SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE
Terminal spacing 0.5000 mm - 0.5000 mm
terminal coating NICKEL PALLADIUM GOLD - NICKEL PALLADIUM GOLD
Packaging Materials PLASTIC/EPOXY - PLASTIC/EPOXY
Analog IC other types SWITCHING REGULATOR - SWITCHING REGULATOR
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