LTC3221EDC#TRMPBF

LTC3221 is a micropower charge pump DC/DC converter that produce a regulated output at upto 60mA. Extremely low operating current (5µA typical at no load) and low external parts count (one flying capacitor and two small bypass capacitors at VIN and VOUT) make them ideally suited for small, battery-powered applications. This device includes fixed 5V and 3.3V output versions plus an adjustable version. All parts operate as Burst Mode® switched capacitor voltage doublers to achieve ultralow quiescent current. The chips use a controlled current to supply the output and will survive a continuous short-circuit from VOUT to GND. The FB pin of the adjustable device can be used to program the desired output voltage. It is widely used in application such as low power 2 AA cell to 3.3V supply, memory backup supplies, tire pressure sensors, general purpose low power Li-ion to 5V supply, RF transmitters, glucose meters etc.

• Input supply voltage is 1.8V to 5.5V
• Shutdown disconnects load from VIN
• Burst mode control, short-circuit protected
• Feedback voltage is 1.23V typical at (TA = 25°C)
• Switching frequency is 600KHz typical at (TA = 25°C, VIN = 2.5V)
• UVLO threshold is 1V typical at (TA = 25°C)
• Operating temperature is -40°C to 85°C
• Package style is 6-lead plastic DFN

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