Analog Devices LTC3256

Description

he LTC®3256 is a wide input range switched capacitorstep-down DC/DC converter that produces two regulatedoutputs: a 5V output via direct connection to the chargepump output, and a 3.3V output via a low dropout (LDO)linear post-regulator. The device provides up to 350mAof total output current. At 12V VIN and maximum load onboth outputs, power dissipation is reduced by over 2Wcompared to a dual LDO regulator solution

Features

Input Voltage Range: 5.5V to 38VIndependently Enabled 5V and 3.3V Fixed Outputs5V Output: 100mA Max3.3V LDO Output: 250mA MaxMultimode Step-Down Charge Pump (2:1, 1:1) withAutomatic Mode SwitchingLow Quiescent Current20μA with Both Outputs Regulating (No Load)0.5μA in ShutdownEngineered for Diagnostic Coverage inISO26262 Systems1.1V Reference Output for System DiagnosticsPower-On Reset and Watchdog Controller withAdjustable TimingOvercurrent Fault Protection on Each OutputOvertemperature Protection150°C Max Operating Junction TemperatureThermally Enhanced 16-Lead MSOP Package

Typical applications

• Industrial/Telecom Housekeeping Supplies
• Low Power 12V to 5V and 3.3V Conversion
• Automotive ECU/CAN Transceiver Supplies

More information

• Datasheet
• IC product information