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FAN5234

Description
SWITCHING CONTROLLER, 690 kHz SWITCHING FREQ-MAX, PDSO16
Categorysemiconductor    Analog mixed-signal IC   
File Size398KB,16 Pages
ManufacturerFairchild
Websitehttp://www.fairchildsemi.com/
Download Datasheet Parametric Compare View All

FAN5234 Overview

SWITCHING CONTROLLER, 690 kHz SWITCHING FREQ-MAX, PDSO16

FAN5234 Parametric

Parameter NameAttribute value
Number of functions1
Number of terminals16
Rated input voltage5 V
Maximum limit input voltage5.25 V
Minimum limit input voltage4.75 V
Maximum operating temperature85 Cel
Minimum operating temperature-10 Cel
Processing package descriptionTSSOP-16
Lead-freeYes
EU RoHS regulationsYes
stateACTIVE
packaging shapeRECTANGULAR
Package SizeSMALL OUTLINE, THIN PROFILE, SHRINK PITCH
surface mountYes
Terminal formGULL WING
Terminal spacing0.6500 mm
terminal coatingNICKEL PALLADIUM GOLD
Terminal locationDUAL
Packaging MaterialsPLASTIC/EPOXY
Temperature levelOTHER
control modeAVERAGE CURRENT
Control TechnologyPULSE WIDTH MODULATION
Analog IC other typesSWITCHING CONTROLLER
Switch configurationPUSH-PULL
Maximum switching frequency690 kHz
FAN5234 — Dual Mobile-Friendly PWM / PFM Controller
November 2010
FAN5234
Dual Mobile-Friendly PWM / PFM Controller
Features
Wide Input Voltage Range for Mobile Systems:
2V to 24V
Excellent Dynamic Response with Voltage Feed-
Forward and Average-Current-Mode Control
Lossless Current Sensing on Low-Side MOSFET or
Precision Over-Current via Sense Resistor
V
CC
Under-Voltage Lockout
Power-Good Signal
Light-Load Hysteretic Mode Maximizes Efficiency
300KHz or 600KHz Operation
TSSOP16 Package
Description
The FAN5234 PWM controller provides high efficiency
and regulation with an adjustable output from 0.9V to
5.5V required to power I/O, chip-sets, memory banks, or
peripherals in high-performance notebook computers,
PDAs,
and
internet
appliances.
Synchronous
rectification and hysteretic operation at light loads
contribute to a high efficiency over a wide range of
loads. The Hysteretic Mode of operation can be
disabled if PWM Mode is desired for all load levels.
Efficiency is further enhanced by using the MOSFET’s
R
DS(ON)
as a current-sense component.
Feed-forward ramp modulation, average current mode
control, and internal feedback compensation provide
fast response to load transients. The FAN5234 monitors
these outputs and generates a PGOOD (power-good)
signal when the soft-start is completed and the output is
within ±10% of its set point. A built-in over-voltage
protection prevents the output voltage from going above
120% of the set point. Normal operation is automatically
restored when the over-voltage conditions cease.
Under-voltage protection latches the chip off when the
output drops below 75% of its set value after the soft-
start sequence is completed. An adjustable over-current
function monitors the output current by sensing the
voltage drop across the lower MOSFET.
Applications
Mobile PC Regulator
Handheld PC Power
Related Resources
Application Note — AN-6002 Component
Calculations and Simulation Tools for FAN5234
or FAN5236
Application Note — AN-1029 Maximum Power
Enhancement Techniques for SO-8 Power
MOSFET
Ordering Information
Part Number
FAN5234MTCX
Operating
Temperature
Range
-10 to +85°C
Package
16-Lead, Thin-Shrink Small-Outline Package (TSSOP)
Packing Method
Tape and Reel
© 2004 Fairchild Semiconductor Corporation
FAN5234 • Rev. 2.0.0
www.fairchildsemi.com

FAN5234 Related Products

FAN5234 FAN5234MTCX FAN5234_10 MBR05S0L
Description SWITCHING CONTROLLER, 690 kHz SWITCHING FREQ-MAX, PDSO16 SWITCHING CONTROLLER, 690 kHz SWITCHING FREQ-MAX, PDSO16 SWITCHING CONTROLLER, 690 kHz SWITCHING FREQ-MAX, PDSO16 SWITCHING CONTROLLER, 690 kHz SWITCHING FREQ-MAX, PDSO16
Number of functions 1 1 1 1
Number of terminals 16 16 16 16
Rated input voltage 5 V 5 V 5 V 5 V
Maximum limit input voltage 5.25 V 5.25 V 5.25 V 5.25 V
Minimum limit input voltage 4.75 V 4.75 V 4.75 V 4.75 V
Maximum operating temperature 85 Cel 85 Cel 85 Cel 85 Cel
Minimum operating temperature -10 Cel -10 Cel -10 Cel -10 Cel
Processing package description TSSOP-16 TSSOP-16 TSSOP-16 TSSOP-16
Lead-free Yes Yes Yes Yes
EU RoHS regulations Yes Yes Yes Yes
state ACTIVE ACTIVE ACTIVE ACTIVE
packaging shape RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR
Package Size SMALL OUTLINE, THIN PROFILE, SHRINK PITCH SMALL OUTLINE, THIN PROFILE, SHRINK PITCH SMALL OUTLINE, THIN PROFILE, SHRINK PITCH SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
surface mount Yes Yes Yes Yes
Terminal form GULL WING GULL WING GULL WING GULL WING
Terminal spacing 0.6500 mm 0.6500 mm 0.6500 mm 0.6500 mm
terminal coating NICKEL PALLADIUM GOLD NICKEL PALLADIUM GOLD NICKEL PALLADIUM GOLD NICKEL PALLADIUM GOLD
Terminal location DUAL DUAL DUAL DUAL
Packaging Materials PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY
Temperature level OTHER OTHER OTHER OTHER
control mode AVERAGE CURRENT AVERAGE CURRENT AVERAGE CURRENT AVERAGE CURRENT
Control Technology PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION
Analog IC other types SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER
Switch configuration PUSH-PULL PUSH-PULL PUSH-PULL PUSH-PULL
Maximum switching frequency 690 kHz 690 kHz 690 kHz 690 kHz
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