LTC3255
Info : RECOMMENDED FOR NEW DESIGNS
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LTC3255

Wide VIN Range Fault Protected 50mA Step-Down Charge Pump

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 16
1ku List Price Starting From $2.78
Features
  • Input Voltage Range: 4V to 48V
  • Adjustable Regulated Output: 2.4V to 12.5V
  • Output Current: 50mA Maximum
  • 16μA Quiescent Current in Regulation at No Load
  • Input Fault Protection from –52V to 60V
  • Multimode Charge Pump (2:1, 1:1) with Automatic Mode Switching Maintains Regulation Over Wide VIN Range
  • Input Voltage Shunt Mode for Current-Fed Applications
  • Power Good Output
  • Overtemperature and Short-Circuit Protection
  • Operating Junction Temperature: 150°C Maximum
  • Thermally Enhanced 10-Lead MSOP and 10-Lead (3mm × 3mm) DFN packages
Additional Details
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The LTC3255 is a switched-capacitor step-down DC/DC converter that produces a regulated output (2.4V to 12.5V adjustable) from a 4V to 48V input. In applications where the input voltage exceeds twice the output voltage, 2:1 capacitive charge pumping extends output current capability beyond input supply current limits. At no load, Burst Mode® operation cuts VIN quiescent current to 16μA.

With its integrated VIN shunt regulator, the LTC3255 excels in 4mA to 20mA current loop applications. The device enables current multiplication; a 4mA input current can power a 7.4mA load continuously. Alternatively, the LTC3255 serves as a higher efficiency replacement for linear regulators and provides a space-saving inductorfree alternative to buck DC/DC converters.

The LTC3255 withstands reverse-polarity input supplies and output short-circuits without damage. Safety features including current limit and overtemperature protection further enhance robustness. The LTC3255 is available in thermally enhanced 10-lead MSOP and low profile 3mm × 3mm 10-lead DFN packages.

Applications

  • Industrial Control, Factory Automation, Sensors, and SCADA Systems
  • Housekeeping Power Supplies
  • Current-Boosting Voltage Regulators for 4mA to 20mA Current Loops
Part Models 16
1ku List Price Starting From $2.78

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Documentation

Documentation

Video

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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Product Lifecycle

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Feb 4, 2020

- 20_0130

Laser Top Mark Conversion for 10-Lead MSOP Packages Assembled in ADPG and UTAC

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Feb 4, 2020

- 20_0130

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Laser Top Mark Conversion for 10-Lead MSOP Packages Assembled in ADPG and UTAC

LTC3255EMSE#PBF

PRODUCTION

LTC3255EMSE#TRPBF

PRODUCTION

LTC3255HMSE#PBF

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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

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DC2041A

LTC3255EMSE Demo Board | -52V/60V Fault-Protected Step-Down Charge Pump, 4V ≤ VIN ≤ 48V, VOUT = 2.5V/3.3V/5V/12V/Adj @ 50mA

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DC2041A

LTC3255EMSE Demo Board | -52V/60V Fault-Protected Step-Down Charge Pump, 4V ≤ VIN ≤ 48V, VOUT = 2.5V/3.3V/5V/12V/Adj @ 50mA

LTC3255EMSE Demo Board | -52V/60V Fault-Protected Step-Down Charge Pump, 4V ≤ VIN ≤ 48V, VOUT = 2.5V/3.3V/5V/12V/Adj @ 50mA

Product Detail

Demonstration circuit 2041A is a regulated output voltage switched-capacitor step-down power supply featuring the 50mA output LTC3255. When VIN exceeds VOUT by more the 2:1, a 2:1 step-down architecture is used to efficiently regulate the output voltage, reducing the input current needed. As VIN reduces below twice VOUT, the LTC3255 will automatically switch to 1:1 mode. The demo board has a 4V to 48V input votlage range and a jumper-selectable output voltage than can be set to 2.5V, 3.3V, 5V, 12V or a user-defined value. The LTC3255 also has an integrated shunt regulator allowing it to provide a regulated output from a 4mA to 20mA current loop. The LTC3255 is a robust device that can survive -52V/60V reverse polarity input supplies, and features short-circuit protection and overtemperature protection.

Tools & Simulations

Tools & Simulations 1

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

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