LTC3245 PDF Datasheet


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Description

This is 250mA Buck-Boost Charge Pump. Features 2.7V to 38V VIN Range IQ = 18 A Operating; 4μA in Shutdown 12V to 5V Efficiency = 81% Multimode Operation (2:1, 1:1, 1:2) with Automatic Mode Switching n Low Noise, Constant Frequency Operation n Pin Selectable Burst Mode ® Operation n V OUT: Fixed 3.3V, 5V or Adjustable (2.5V to 5V) n I OUT Up to 250mA n Overtemperature and Short-Circuit Protection n Operating Junction Temperature: 150°C Maximum n Thermally Enhanced 12-Pin MSOP and Low Profile 12-Pin (3mm × 4mm) DFN Packages n n n n LTC3245 Wide VIN Range, Low Noise, 250mA Buck-Boost Charge Pump Description The LTC®3245 is a switched capacitor buck-boost DC, DC converter that produces a regulated output (3.3V, 5V or adjustable) from a 2.7V to 38V input. The device uses switched capacitor fractional conversion to maintain regulation over a wide range of input voltage. Internal circuitry automatically selects the conversion ratio to optimize efficiency as input voltage and load conditions vary. No inductors are requi.