This post explains for the regulator.
The Part Number is APL5607A.
The function of this semiconductor is 600mA Linear Regulator for DC Fan Speed Control.
Manufacturer: ANPEC
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Description
The APL5607A is 600mA Linear Regulator for DC Fan Speed Control.
The APL5607/A is a low quiescent current and low dropout linear regulator which is designed to power a DC fan and deliver up to 600mA output current. The output voltage follows the 1.6 times of VSET voltage and typical dropout voltage is only 220mV (typical) at 600mA output current.
Features
· Low Dropout Voltage: 220mV (Typical) @ 600mA
· Low Quiescent Current: 140mA
· Enable/ShutdownFunction
· Output Voltage / VSET Voltage: 1.6 Times
· Stable with Low ESR Ceramic Capacitors
· Over-Temperature Protection
· Current-Limit Protection with Foldback Current
· Internal Soft-Start […]
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