LTC3109_15 Datasheet, PDF (7/24 Pages) Linear Technology – Auto-Polarity, Ultralow Voltage Step-Up Converter and Power Manager

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).
For more information www.linear.com/LTC3109
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