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Overview
| Topology | High Voltage Output |
| Input voltage | 5.5-38 V |
| Output 1 | 3.3 V / 0.25 A |
| Output 2 | 5 V / 0.1 A |
| IC revision | A |
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
- Automotive ECU/CAN Transceiver Supplies
- Industrial/Telecom Housekeeping Supplies
- Low Power 12V to 5V and 3.3V Conversion
More information
Products
Order Code | Datasheet | Downloads | Status | Product series | Pins | Type | Mount | L(mm) | IR(A) | Working Voltage(V (AC)) | Operating Temperature | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WR-PHD Jumper, 2, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Jumper | Pins2 | – | – | – | Rated Current3 A | Working Voltage200 V (AC) | Operating Temperature -25 °C up to +105 °C | |||
 | WR-PHD Pin Header, 3, Straight | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header | Pins3 | TypeStraight | MountTHT | Length6 mm | Rated Current2 A | Working Voltage200 V (AC) | Operating Temperature -40 °C up to +105 °C | |||
 | WR-PHD Pin Header, 4, Straight | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header | Pins4 | TypeStraight | MountTHT | Length8 mm | Rated Current2 A | Working Voltage200 V (AC) | Operating Temperature -40 °C up to +105 °C |