LTC3525-3_15 Datasheet, PDF (8/16 Pages) Linear Technology – 400mA Micropower Synchronous Step-Up DC/DC Converter with Output Disconnect

LTC3525-3/
LTC3525-3.3/LTC3525-5
Pin Functions
SHDN (Pin 1): Logic-Controlled Shutdown Input. Con-
nect to a voltage >1V to enable the LTC3525. Connect to
a voltage <0.4V to disable the LTC3525.
GND (Pins 2, 5): Ground.
V_IN (Pin 3): Input Voltage. The LTC3525 is powered from
V_IN until V_OUT exceeds V_IN. Once V_OUT is greater than (V_IN
+ 0.2V typical), it is powered from V_OUT. Place a ceramic
bypass capacitor from V_IN to GND. A minimum value of
1µF is recommended.
V_OUT (Pin 4): Output Voltage Sense and the Output of the
Synchronous Rectifier. Connect the output filter capacitor
from V_OUT to GND, close to the IC. A minimum value of
10µF ceramic is recommended. Use 22µF for reduced
output ripple. The output disconnect feature disconnects
V_OUT from V_IN when SHDN is <0.4V.
SW (Pin 6): Switch Pin. Connect an inductor from this
pin to V_IN. An internal antiringing resistor is connected
across SW and V_IN after the inductor current has dropped
to zero to minimize EMI.
3525fc
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For more information www.linear.com/LTC3525