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.
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
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