BD4271FP2-CE2

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The BD4271FP2-CE2 is a fixed-output low dropout (LDO) voltage regulator manufactured by ROHM Semiconductor. It provides a stable 5 V output with a maximum continuous current of 550 mA. The device supports an input voltage range from 5.5 V to 45 V, featuring high noise rejection with a typical PSRR of 60 dB at 120 Hz. It operates within a junction temperature range of -40°C to +150°C and meets AEC-Q100 automotive qualification standards. Key electrical parameters include a typical dropout voltage of 200 mV at 300 mA, a quiescent current of 75 µA, and line regulation of 30 mV.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Integrates reset circuitry and a watchdog timer for system monitoring
• Includes an enable control pin for output shutdown and power saving
• Provides comprehensive protection against overcurrent, thermal overload, and undervoltage lockout

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Automotive electronic control units requiring high-voltage tolerance
• Battery-powered systems needing low standby current consumption
• Industrial equipment requiring reliable voltage regulation under varying load conditions

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the specific suffix CE2 to confirm the TO-263-7 package configuration and tape-and-reel quantity. Ensure compatibility with AEC-Q100 requirements if deploying in automotive environments. Cross-reference the datasheet for exact thermal resistance values and recommended external capacitor specifications for stability during design validation.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component when a 5 V fixed output is required alongside integrated system supervision features. The wide input voltage range up to 45 V makes it suitable for direct battery connection in automotive applications. Consider the TO-263-7 package for adequate heat dissipation at higher load currents compared to smaller surface-mount options.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This part belongs to the BD4271 series of LDO regulators designed for automotive use. It shares core electrical characteristics with variants like the BD4271EFJ-CE2 but differs in package type and pinout. The series emphasizes functional safety support and robust protection mechanisms for critical vehicle electronics.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

The BD4271FP2-C is listed as an alias or predecessor variant. Verify pin compatibility and thermal performance before substitution. No other direct cross-model replacements are confirmed in public documentation.