High-Voltage, Dual-Output Step-Down Charge Pump

Linear Technology’s new LTC3256 is a high-voltage, low-noise, dual-output power supply that  takes a single positive input and generates 5- and 3.3-V step-down supplies with high efficiency and no inductors. Featuring a 5.5-to-38-V input voltage range, the LTC3256 includes independently enabled dual outputs: a 5-V, 100-mA supply and a 250-mA, 3.3-V low-dropout (LDO) regulator for a total of 350 mA available output current. This combination of regulators offers much lower power dissipation than a dual-LDO solution. The device is well-suite for a variety of applications,  including automotive ECU/CAN transceiver supplies and general-purpose 12-to-5-V and 3.3-V conversion.Linear LT3256

 

The LTC3256’s features and  specs:

  • Input voltage range of  5.5 to 38 V
  • Independently enabled 5- and 3.3-V fixed outputs
  • 5-V Output: 100 mA max
  • 3.3V LDO Output: 250 mA Max
  • Multi-mode step-down charge pump (2:1, 1:1) with automatic mode switching
  • Low quiescent current
  • 20 μA with both outputs regulating (no load)
  • Less than 0.5 μA in Shutdown
  • Engineered for ISO26262 diagnostic coverage in systems
  • 1.1-V Reference output for system diagnostics
  • Power-on reset and watchdog controller with adjustable timing
  • Overcurrent fault protection on each output
  • Overtemperature protection
  • 150°C Max operating junction temperature
  • Thermally enhanced 16-lead MSOP package

Source: Linear Technology

ADVERTISMENT