Specification	BD4271FP2-CE2

Control Features	Enable
Current - Output	550 mA
Current - Quiescent (Iq)	150 çA
Grade	Automotive
Mounting Type	Surface Mount
Number of Regulators	1
Operating Temperature [Max]	150 °C
Operating Temperature [Min]	-40 °C
Output Configuration	Positive
Package / Case	TO-263CA, D2PAK (7 Leads + Tab), TO-263-8
Protection Features	Over Temperature, Over Current, Short Circuit
PSRR	60 dB
Qualification	AEC-Q100
Supplier Device Package	TO-263-7
Voltage - Input (Max) [Max]	45 V
Voltage - Output (Min/Fixed)	5 V
Voltage Dropout (Max)	0.5 V

BD4271 Series

550mA 5V Output LDO Regulator with WDT and Voltage Detector for Automotive

Part	PSRR	Number of Regulators	Supplier Device Package	Current - Output	Qualification	Voltage - Output (Min/Fixed)	Voltage Dropout (Max)	Mounting Type	Output Configuration	Operating Temperature [Min]	Operating Temperature [Max]	Current - Quiescent (Iq)	Package / Case	Grade	Protection Features	Voltage - Input (Max) [Max]	Control Features
Rohm Semiconductor BD4271HFP-CTR	60 dB	1	HRP7	550 mA	AEC-Q100	5 V	0.5 V	Surface Mount	Positive	-40 °C	150 °C	150 çA	HRP-7 (7 Leads + Tab)	Automotive	Over Current Over Temperature Short Circuit	45 V	Enable
Rohm Semiconductor BD4271FP2-CE2	60 dB	1	TO-263-7	550 mA	AEC-Q100	5 V	0.5 V	Surface Mount	Positive	-40 °C	150 °C	150 çA	D2PAK (7 Leads + Tab) TO-263-8 TO-263CA	Automotive	Over Current Over Temperature Short Circuit	45 V	Enable

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Cut Tape (CT)	1	$ 5.19
		10	$ 3.47
		25	$ 3.02
		100	$ 2.52
		250	$ 2.27
	Digi-Reel®	1	$ 5.19
		10	$ 3.47
		25	$ 3.02
		100	$ 2.52
		250	$ 2.27
	N/A	375	$ 3.66
	Tape & Reel (TR)	500	$ 1.81
Newark	Each (Supplied on Cut Tape)	1	$ 5.26
		10	$ 2.96
		25	$ 2.79
		50	$ 2.60
		100	$ 2.42
		300	$ 2.15
		500	$ 1.94
		1000	$ 1.88

Description

General part information

BD4271 Series

BD4271HFP-C is automotive voltage regulator with watchdog timer and offers the output current of 550mA while limiting the quiescent current low. A logical "HIGH" at the CTL pin enables the LDO regulator and "LOW" disables the LDO regulator and keeps current consumption low. A reset signal is generated for an output voltage VOof Typ 4.65V. The reset delay time and watchdog time (WDT) can be programmed by the external capacitor.

Documents

Technical documentation and resources

BD4271FP2-CE2 Flammability

AEC-Q101 Automotive Requirements

Problem Situations: Power Supply Does Not Start

BD4271FP2-CE2

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BD4271FP2-CE2

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Technical Specifications

BD4271 Series

Pricing

Description

BD4271 Series

Documents

BD4271FP2-CE2 Flammability

AEC-Q101 Automotive Requirements

Problem Situations: Power Supply Does Not Start

TO263-7 Package Information

θ<sub>JC</sub> and Ψ<sub>JT</sub>

Heat Dissipation Effect of Thermal Via in Exposed Pad Type Package

Precautions When Measuring the Rear of the Package with a Thermocouple

Simple Test Method for Estimating the Stability of Linear Regulators

Anti-Whisker formation

θ<sub>JA</sub> and Ψ<sub>JT</sub>

Five Steps for Successful Thermal Design of IC

Calculating Junction Temperature from Inrush Current

Compliance with the ELV directive

Thermal Calculation for Linear Regulator

How to Use the Thermal Resistance and Thermal Characteristics Parameters

Basics of Thermal Resistance and Heat Dissipation

BD4271FP2-C Data Sheet

Impedance Characteristics of Bypass Capacitor

How to Use the Two-Resistor Model

Power Source ON/OFF Characteristics for Linear Regulator

Overview of ROHM's Simulation Models(for ICs and Discrete Semiconductors)

Solder Joint Rate and Thermal Resistance of Exposed Pad

Reverse Voltage Protection

Design Guide and Example of Stencil for Exposed Pad

Basics of Linear Regulators

How to Select Reverse Current Protection Diodes for LDO Regulators

PCB Layout Thermal Design Guide

Factory Information

Connecting LDOs in Parallel

Six Steps for Successful Thermal Design of LDO Regulator ICs

Method for Calculating Junction Temperature from Transient Thermal Resistance Data

Measurement Method for Phase Margin with Frequency Response Analyzer (FRA)

What Is Thermal Design

Thermal Resistance

Power Supply Sequence Circuit with General Purpose Power Supply IC

Suppression Method of Switching Noise Using Linear Regulator and Low Pass Filter

Judgment Criteria of Thermal Evaluation

Technical Data Sheet EN

BD4271 Series