LTC3109
PIN FUNCTIONS
(DFN/SSOP)
C1B (Pin 9/Pin 11):
Input to the Charge Pump and Rectifier
Circuit for Channel B. Connect a capacitor from this pin
to the secondary winding of the “B” step-up transformer.
See the Applications Information section for recommended
capacitor values.
C1A (Pin 18/Pin 20):
Input to the Charge Pump and Recti-
fier Circuit for Channel A. Connect a capacitor from this pin
to the secondary winding of the “A” step-up transformer.
See the Applications Information section for recommended
capacitor values.
C2B (Pin 10/Pin 12):
Input to the Gate Drive Circuit for
SWB. Connect a capacitor from this pin to the secondary
winding of the “B” step-up transformer. See the Applications
Information section for recommended capacitor values.
C2A (Pin 17/Pin 19):
Input to the Gate Drive Circuit for
SWA. Connect a capacitor from this pin to the secondary
winding of the “A” step-up transformer. See the Applications
Information section for recommended capacitor values.
SWA (Pin 15/Pin 17):
Connection to the Internal N-Chan-
nel Switch for Channel A. Connect this pin to the primary
winding of the “A” transformer.
SWB (Pin 12/Pin 14):
Connection to the Internal N-Chan-
nel Switch for Channel B. Connect this pin to the primary
winding of the “B” transformer.
V
INA
(Pin 14/Pin 16):
Connection to the Internal N-Channel
Switch for Channel A. Connect this pin to one side of the
input voltage source (see Typical Applications).
V
INB
(Pin 13/Pin 15):
Connection to the Internal N-Channel
Switch for Channel B. Connect this pin to the other side of
the input voltage source (see Typical Applications).
3109fa
7
LINEAR [ LINEAR INTEGRATED SYSTEMS ]
