Datasheet LTC3525D-3.3 (Analog Devices) - 6

LTC3525D-3.3
pin FuncTions SHDN (Pin 1):
Logic-Controlled Shutdown Input. Connect
VOUT (Pin 4):
Output Voltage Sense and the Output of the to a voltage >1V to enable the LTC3525D. Connect to a Synchronous Rectifier. Connect the output filter capacitor voltage <0.4V to disable the LTC3525D and connect VIN from VOUT to GND, close to the IC. A minimum value of to VOUT through the inductor. 10µF ceramic is recommended. Use 22µF for reduced
GND (Pins 2, 5):
Ground. output ripple. The pass-through mode feature connects VOUT to VIN through the inductor when SHDN is <0.4V.
VIN (Pin 3):
Input Voltage. The LTC3525D is powered from V
SW (Pin 6):
Switch Pin. Connect an inductor from this IN until VOUT exceeds VIN. Once VOUT is greater than (V pin to VIN. An internal antiringing resistor is connected IN + 0.2V typical), it is powered from VOUT. Place a ceramic bypass capacitor from V across SW and VIN after the inductor current has dropped IN to GND. A minimum value of 1µF is recommended. to zero to minimize EMI. 3525d33fb 6 For more information www.linear.com/LTC3525D3.3 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Typical Applications Package Description Revision History Related Parts