BD3571FP-E2

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

The BD3571FP-E2 is a high-voltage LDO regulator from ROHM Semiconductor, designed for automotive body control applications. It provides a fixed 5.0 V output with a maximum current of 500 mA and features ultra-low quiescent current of 30 μA typical. The device supports an input voltage range of 5.5 V to 36 V and withstands up to 50 V. It utilizes P-channel DMOS output transistors for low saturation voltage and allows the use of low-ESR ceramic capacitors at the output. Built-in protections include folded-type overcurrent protection and thermal shutdown.

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

• Ultra-low quiescent current consumption of 30 μA typical
• High output voltage precision within ±2% across wide temperature ranges
• Compatible with low-ESR ceramic capacitors for stable operation
• Integrated folded-type overcurrent protection and thermal shutdown circuits

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

• Onboard vehicle microcontroller power supplies
• Automotive body-control systems
• Car stereo audio equipment
• Satellite navigation systems

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

Verify component authenticity through authorized channels as this part may be subject to obsolescence notices. Confirm package type TO252-3 and RoHS compliance status prior to procurement. Ensure supply chain partners provide valid traceability documentation. Check latest datasheet revisions for any changes in electrical characteristics or recommended operating conditions before finalizing orders.

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

Select this regulator when a fixed 5V supply is required for automotive electronics with high noise immunity needs. Consider the 50V withstand voltage capability for direct battery-coupled systems. Evaluate thermal dissipation requirements based on input-output voltage differential and load current. Verify that external capacitor ESR values fall within acceptable ranges for stability without requiring additional compensation components.

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

This component belongs to the BD357XFP/HFP series of high-voltage LDO regulators developed specifically for harsh automotive environments. The FP suffix indicates the TO252 package style, distinguishing it from the HRP5 packaged HFP variants. The series offers various fixed and adjustable output voltages to support different onboard electronic loads while maintaining robust performance under varying thermal and electrical conditions.

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

BD3571HFP serves as a package-compatible alternative within the same series offering identical electrical specifications but utilizing the HRP5 package format instead of TO252-3.