USB/Charger Detection Device with Load Switch

The FAN3989 is a USB connection monitoring device used to determine if a standard USB device is connected or a battery-changing device is connected.     The FAN3989 sets the FLAG1 pin to logic HIGH or LOW as an indicator to the system controller that a standard USB device or a charger is connected to the USB port. The FAN3989 also monitors the VBUS for over- or under-voltage conditions. The FLAG2 pin is set LOW if VBUS is less than 3.3V or greater than 6.0V. The internal load switch control pin is set HIGH if VBUS is less than 3.3V or greater than 6.0V, turning off the PMOS switch.The FAN3989 is available in a very small 8-lead MLP package suitable for small board space applications, like mobile phones.


  • Charger/USB Detection Device with Load Switch
  • Charger/USB Device Detection Flag
  • Over/Under-Voltage Detection Flag
  • Load Switch Output, Up to 1.5A Charge Current
  • VBUS Supply: 2.7V to 20V
  • CON of 1.5pF
  • Package: 8-Lead MLP
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Product Product &
Eco Status
Unit Price/
1K Order
Packing Method Convention Package Marking
FAN3989MLP8X Full Production
Green as of Dec 2007
 China RoHS

MLP 3x3 8L (Power 33)  -  Details
0.8 x 3 x 3mm,  TAPE REEL

PDF MLP 3x3 8L (Power 33)  Drawing
Last Update: Feb 2012 PDF MLP8L 3.0x3.0, Packing Drawing
Last Update: Jan 2016 PDF MLP3X3 Tape And Reel Packing Drawing
Last Update: Sep 2016
Line 1$Y (Fairchild logo)
&Z (Plant Code)
&2 (2-Digit Date Code)

Line 23989

ESD (CDM) 1000V

ESD (HBM) 4000V

Moisture Sensitivity Level (MSL) 1

Max Reflow Temp 260

PDF China RoHS

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  • External AC-DC Merchant Power Supply - Wireless Communications
  • Mobile Handsets

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