LTC3255

RECOMMENDED FOR NEW DESIGNS

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

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Overview

  • 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
LTC3255
Wide VIN Range Fault Protected 50mA Step-Down Charge Pump
7.4mA DC Supply from 4mA to 20mA Current Loop Available Output Current vs Input Current Product Package 1 Product Package 2
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Documentation

Data Sheet 1

User Guide 1

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Hot Swap Controllers 1
LT4363
RECOMMENDED FOR NEW DESIGNS High Voltage Surge Stopper with Current Limit
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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

  • LTC3255
LTspice

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.

Evaluation Kits

eval board
schematic 1
DC2041A

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

Buy Now View Details

Product Details

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.

eval board
schematic 2
DC2041A

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

Buy Now View Details

Product Details

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.
DC2041A
LTC3255EMSE Demo Board | -52V/60V Fault-Protected Step-Down Charge Pump, 4V ≤ VIN ≤ 48V, VOUT = 2.5V/3.3V/5V/12V/Adj @ 50mA
DC2041A - Schematic
DC2041A
LTC3255EMSE Demo Board | -52V/60V Fault-Protected Step-Down Charge Pump, 4V ≤ VIN ≤ 48V, VOUT = 2.5V/3.3V/5V/12V/Adj @ 50mA
DC2041A - Schematic

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