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LTC3204-5 Datasheet(PDF) 1 Page - Linear Technology |
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LTC3204-5 Datasheet(HTML) 1 Page - Linear Technology |
1 / 16 page LTC3245 1 3245f For more information www.linear.com/LTC3245 Typical applicaTion FeaTures DescripTion Wide VIN Range, Low Noise, 250mA Buck-Boost Charge Pump 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 required. The unique constant frequency architecture provides a lower noise output than conventional charge pump regu- lators. To optimize efficiency at the expense of slightly higher output ripple, the device has pin selectable Burst Mode operation. Low operating current (20μA with no load, 4μA in shut- down) and low external parts count (three small ceramic capacitors)maketheLTC3245ideallysuitedforlowpower, spaceconstrainedautomotive/industrialapplications.The deviceisshort-circuitandovertemperatureprotected,and is available in thermally enhanced 12-pin MSOP and low profile 3mm × 4mm 12-pin DFN packages. Efficient Regulated 5V Output applicaTions n Automotive ECU/CAN Transceiver Supplies n Industrial Housekeeping Supplies n Low Power 12V to 5V Conversion L , LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. 5VOUT Efficiency vs Output Current n 2.7V to 38V VIN Range n IQ = 18µA Operating; 4μA in Shutdown n 12V to 5V Efficiency = 81% n 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 VOUT: Fixed 3.3V, 5V or Adjustable (2.5V to 5V) n IOUT 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 IOUT (mA) 3245 TA01b 90 70 60 80 50 30 20 40 10 400 300 250 350 200 100 50 150 0 0.1 100 1000 10 1 EFFICIENCY PLOSS VIN = 12V C+ C– VIN SEL2 BURST SEL1 VOUT OUTS/ADJ PGOOD GND LTC3245 VIN = 2.7V TO 38V VOUT = 5V IOUT UP TO 250mA 3245 TA01a 1µF 1µF 10µF 500k |
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Similar Description - LTC3204-5 |
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