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FAN5235FAIRCHILN/a796avaiSystem Electronics Regulator for Mobile PCs


FAN5235 ,System Electronics Regulator for Mobile PCsFeatures Description• Synchronous rectification The FAN5235 is a high efficiency and high precision • ..
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FAN5235MTC ,System Electronics Regulator for Mobile PCsFeatures Description• Synchronous rectification The FAN5235 is a high efficiency and high precision • ..
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FAN5235
System Electronics Regulator for Mobile PCs

Features
Synchronous rectification ±1% precision internal reference >90% efficiency Input and output voltage feedback 5.4V to 24V input voltage range Internally set 300kHz ±15% oscillator 5V and 3.3V Main outputs switch out of phase 5V-ALWAYS and 3.3V-ALWAYS outputs Adjustable boost converter for 12V Boost converter slaved to 5V Main Input UVLO Outputs OVP of Buck Converters Precision current limit option for 5V, 3.3V Main Power Good V oltage Monitor
Applications
Notebook PCs and PDAs Hand-held portable instruments
Description

The FAN5235 is a high efficiency and high precision
DC/DC controller for notebook converters. Utilization of
both input and output voltage feedback in a current-mode
control allows for fast and stable loop response over a wide
range of input and output voltage variations. The two main
regulators switch out of phase to minimize input ripple
current.
Current sense based on MOSFET Rdson gives maximum
efficiency, while also permitting use of a sense resistor for
high accuracy. An externally adjustable boost converter can
be set to generate 12V.
The FAN5235 is available in a 24-pin QSOP package, and in
a 24-pin TSSOP package.
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