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Производитель:Linear Technology
Серия:LTC3245
Модель:LTC3245MPMSE#PBF

Малошумящий повышающе-понижающий регулируемый преобразователь напряжения с выходным током 250 мА на основе зарядового насоса

Datasheets

  • Скачать » Datasheet, PDF, 550 Кб
    Выписка из документа ↓
    FeaTures 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 required. The unique constant frequency architecture provides a lower noise output than conventional charge pump regulators. To optimize efficiency at the expense of slightly higher output ripple, the device has pin selectable Burst Mode operation. Low operating current (20A with no load, 4A in shutdown) and low external parts count (three small ceramic capacitors) make the LTC3245 ideally suited for low power, space constrained automotive/industrial applications. The device is short-circuit and overtemperature protected, and is available in thermally enhanced 12-pin MSOP and low profile 3mm Ч 4mm 12-pin DFN packages. n 2.7V to 38V VIN Range IQ = 18µA Operating; 4A in Shutdown 12V to 5V Efficiency = 81% Multimode Operation (2:1, 1:1, 1:2) with Automatic Mode Switching Low Noise, Constant Frequency Operation Pin Selectable Burst Mode® Operation VOUT: Fixed 3.3V, 5V or Adjustable (2.5V to 5V) IOUT Up to 250mA Overtemperature and Short-Circuit Protection Operating Junction Temperature: 150°C Maximum Thermally Enhanced 12-Pin MSOP and Low Profile 12-Pin (3mm Ч 4mm) DFN Packages applicaTions n Automotive ECU/CAN Transceiver Supplies Industrial Housekeeping Supplies 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. Typical applicaTion
    Efficient Regulated 5V Output
    90 1µF 80 70 EFFICIENCY (%) C+ VIN = 2.7V TO 38V 1µF VIN SEL2 BURST SEL1 C­ VOUT OUTS/ADJ PGOOD GND
    3245 TA01a 5VOUT Efficiency vs Output Current
    VIN = 12V EFFICIENCY 400 350 300 250 200 PLOSS 150 100 50 1 10 IOUT (mA) 100 0 1000
    3245 TA01b 60 50 40 30 20 10 0.1 PLOSS (mW) LTC3245 500k VOUT = 5V IOUT UP TO 250mA 10µF 3245fa For more information www.linear.com/LTC3245 1 LTC3245 absoluTe MaxiMuM raTings
    (Note 1) VIN, SEL1, SEL2, BURST . ­0.3V to 38V VOUT, OUTS/ADJ, PGOOD . ­0.3V to 6V IPGOOD .2mA VOUT Short-Circuit Duration . Indefinite Operating Junction Temperature Range (Notes 2, 3) (E-/I-Grade). ­40°C to 125°C (H-Gra ...

Цены

    MSOP
    ПоставщикПроизводительНаименованиеЦена
    ЭлитанLinear TechnologyLTC3245MPMSE817 руб.
    КремнийLinear TechnologyLTC3245MPMSE PBFпо запросу
    Подробнее об условиях поставки »

Классификация производителя

Power Management > Inductorless (Charge Pump) DC/DC Converters > Regulated Buck Boost Charge Pumps

Варианты написания: LTC3245MPMSEPBF, LTC3245MPMSE PBF

Выписка из документа:
FeaTures 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 required. The unique constant frequency architecture provides a lower noise output than conventional charge pump...

На английском языке: Datasheet Linear Technology LTC3245MPMSE#PBF

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