Diodes AL8811 - Manual (Page 2)

AL8811
Document number: DS36090 Rev. 2 - 2
2 of 11
www.diodes.com
June 2013
© Diodes Incorporated
AL8811
Pin Descriptions
Pin Name Pin Number Descriptions
Current
Switch+
1
Internal switch transistor collector:
Connect to Inductor for boost converter.
Connect to V
CC
for Buck or Inverting converter
Current
Switch-
2
Internal switch transistor emitter:
Connect to GND for boost converter
Connect to Inductor for buck or inverting converter
CT 3 Timing Capacitor to control the switching frequency
GND 4
Feedback 5 Feedback pin for inverting input of internal comparator
VCC 6 Supply voltage pin
Current
Sense
7
Peak Current Sense Input by monitoring the voltage drop across an external current sense
resistor to limit the peak current through the switch
Current
Drive
8
Current drive collector:
Normally connected to V
CC
directly or via a resistor.
Functional Diagram