RadioLocman.com Electronics ru
Advanced Search +
  

Datasheet Linear Technology LTC3245EMSE#PBF

Manufacturer:Linear Technology
Series:LTC3245
Part Number:LTC3245EMSE#PBF

Wide VIN Range, Low Noise, 250 mA Buck-Boost Charge Pump

Datasheets

  • Download » Datasheet, PDF, 550 Kb
    Docket ↓
    FeaTures LTC3245 Wide VIN Range, Low Noise, 250mA Buck-Boost Charge Pump DescripTion
    The LTC3245 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 4mm 12-pin DFN packages. n 2.7V to 38V VIN Range IQ = 18A 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: 150C Maximum Thermally Enhanced 12-Pin MSOP and Low Profile 12-Pin (3mm 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 1F 80 70 EFFICIENCY (%) C+ VIN = 2.7V TO 38V 1F 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 10F 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). 40C to 125C (H-Gra ...

Manufacturer's Classification

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

Other Names: LTC3245EMSEPBF, LTC3245EMSE PBF

Docket:
FeaTures LTC3245 Wide VIN Range, Low Noise, 250mA Buck-Boost Charge Pump DescripTion
The LTC3245 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 4mm 12-pin DFN packages. n 2.7V to 38V VIN Range IQ = 18A 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: 150C Maximum Thermally Enhanced 12-Pin MSOP and Low Profile 12-Pin (3mm 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 trademark...

Slices ↓
Radiolocman facebook Radiolocman twitter Radiolocman google plus