LTC3256HMSE#PBF

Overview

The LTC3256HMSE#PBF is a dual-output power management integrated circuit manufactured by Analog Devices Inc. It integrates a step-down charge pump and a low-dropout linear regulator (LDO) in a single package. The device operates with an input voltage range of 5.5V to 38V, making it suitable for automotive applications such as 12V battery systems. It provides two non-isolated outputs: one from the buck charge pump and one from the LDO. The component is designed for high diagnostic coverage in ISO 26262 systems and features an integrated watchdog timer.

Feature Summary

• Integrates a dual-output topology combining a step-down charge pump and a post-regulator LDO within a single IC.
• Engineered specifically for high diagnostic coverage requirements in ISO 26262 automotive safety systems.
• Includes an integrated watchdog timer for system monitoring and fault detection.
• Operates over a wide input voltage range compatible with standard automotive battery loads.

Applications

• Automotive electronic control units requiring robust power regulation from 12V battery sources
• Systems demanding high functional safety compliance under ISO 26262 standards
• Applications needing simultaneous generation of multiple regulated voltage rails from a single input

Procurement Notes

Verify that the specific suffix #PBF indicates lead-free packaging compliant with RoHS directives. Confirm the HMSE grade corresponds to the required industrial or automotive temperature specifications for your design environment. Ensure the 16-MSOP-EP package footprint matches your PCB layout constraints. Cross-reference the manufacturer's latest datasheet to confirm current production status and any potential obsolescence notices before finalizing procurement plans.

Selection Notes

Select this component when designing power supplies for automotive environments that require both efficient buck conversion and precise LDO regulation. It is appropriate for designs where space savings from integrating two regulators into one package are critical. Consider this part if the application mandates built-in diagnostic capabilities and watchdog functionality to meet stringent safety standards without adding external components.

Part Context

This part belongs to the LTC3256 family of dual-output power management ICs. It is commonly evaluated using demonstration circuits like the DC2375A, which populates the board with automotive-grade components to test performance under realistic conditions. The device serves as a solution for reducing power dissipation compared to using separate ideal linear regulators in similar voltage conversion scenarios.

Replacement Considerations

Direct substitutes include the LTC3256EMSE#PBF and LTC3256IMSE#PBF. These variants share the same functional architecture but differ in temperature grades and performance specifications. Verify electrical characteristics against your specific thermal and operational requirements before substituting.