BD3570FP-E2 Equivalent & Substitute Parts

Part Overview

The BD3570FP-E2 is a linear voltage regulator IC manufactured by Rohm Semiconductor, designed to deliver a fixed 3.3V output at 500mA in a TO-252-3 (DPAK) surface mount package. This device is classified as Not For New Designs, indicating it has reached end-of-life status. Finding equivalent or substitute parts is necessary for ongoing production support, maintenance applications, and design transitions to active alternatives that maintain electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Manufacturer Part Number	BD3570FP-E2
Manufacturer	Rohm Semiconductor
Output Voltage (Fixed)	3.3V
Output Current	500mA
Input Voltage (Max)	36V
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63
Mounting Type	Surface Mount
Operating Temperature	-40°C ~ 125°C
Protection Features	Over Current, Over Temperature
RoHS Status	ROHS3 Compliant
Product Status	Not For New Designs

Substitute Part Grouping Explanation

Substitution of the BD3570FP-E2 is determined by the following critical parameters:

Electrical Compatibility Requirements:

Fixed output voltage of 3.3V
Output current capability of 500mA or greater
Maximum input voltage of 26V or higher
Operating temperature range of -40°C to 125°C or wider
Protection features including Over Current and Over Temperature

Mechanical Compatibility Requirements:

TO-252-3 (DPAK) package with identical pin configuration
Surface mount technology
RoHS3 compliance

Substitute parts are grouped into two categories:

Direct Current Capacity Substitutes (500mA): Parts with 500mA output current matching the original specification
Reduced Current Capacity Substitutes (50mA–400mA): Parts with lower output current suitable for applications not requiring full 500mA capacity

Parameter Comparison

Parameter	BD3570FP-E2	TL760M33QKVURQ1	TLE42744DV33ATMA1	NCV4274ADT33RKG	LM2936QDT-3.3/NOPB	SM72238TD-3.3/NOPB
Manufacturer	Rohm Semiconductor	Texas Instruments	Infineon Technologies	onsemi	Texas Instruments	Texas Instruments
Output Voltage	3.3V	3.3V	3.3V	3.3V	3.3V	3.3V
Output Current	500mA	500mA	400mA	400mA	50mA	100mA
Input Voltage (Max)	36V	26V	40V	40V	40V	30V
Quiescent Current (Iq)	30 µA	15 mA	220 µA	250 µA	15 µA	140 µA
Dropout Voltage	Not specified	0.5V @ 500mA	0.5V @ 250mA	1.27V @ 250mA	0.4V @ 50mA	0.6V @ 100mA
Package	TO-252-3	TO-252-3	TO-252-3	TO-252-3	TO-252-3	TO-252-3
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 150°C	-40°C ~ 150°C	-40°C ~ 125°C	-40°C ~ 125°C
Product Status	Not For New Designs	Last Time Buy	Active	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
AEC-Q100 Qualified	No	Yes	Yes	Yes	Yes	No

Engineering Selection Recommendations

For 500mA Output Current Applications:

TL760M33QKVURQ1 (Texas Instruments) is the primary substitute for direct 500mA replacement. It maintains identical output current and TO-252-3 packaging. However, its maximum input voltage is limited to 26V compared to the BD3570FP-E2's 36V. This part is in Last Time Buy status. AEC-Q100 qualification is available for automotive applications.

For 400mA Output Current Applications:

TLE42744DV33ATMA1 (Infineon Technologies) and NCV4274ADT33RKG (onsemi) both provide 400mA output current with TO-252-3 packaging. TLE42744DV33ATMA1 is Active and AEC-Q100 qualified with extended operating temperature to 150°C. NCV4274ADT33RKG is Obsolete status. Both support 40V maximum input voltage.

For Lower Current Applications (≤100mA):

LM2936QDT-3.3/NOPB (Texas Instruments) provides 50mA output with Active status and AEC-Q100 qualification. SM72238TD-3.3/NOPB (Texas Instruments) provides 100mA output with Active status. Both are suitable for applications not requiring full 500mA capacity.

Compliance Considerations:

All substitute parts maintain ROHS3 compliance. For automotive applications requiring AEC-Q100 qualification, TL760M33QKVURQ1, TLE42744DV33ATMA1, LM2936QDT-3.3/NOPB, and LM2936QDTX-3.3/NOPB are qualified options.

Frequently Asked Questions (FAQ)

Q: Can TL760M33QKVURQ1 directly replace BD3570FP-E2 in all applications?

A: TL760M33QKVURQ1 provides identical 500mA output current and TO-252-3 packaging. However, its maximum input voltage is 26V versus the BD3570FP-E2's 36V. Substitution is valid only if your input voltage does not exceed 26V.

Q: What is the difference between TLE42744DV33ATMA1 and NCV4274ADT33RKG?

A: Both provide 400mA output in TO-252-3 packaging at 3.3V. TLE42744DV33ATMA1 is Active with AEC-Q100 qualification and 150°C maximum operating temperature. NCV4274ADT33RKG is Obsolete. TLE42744DV33ATMA1 is the preferred choice for new designs.

Q: Are LM2936 variants suitable replacements for 500mA applications?

A: LM2936 variants (LM2936DT-3.3/NOPB, LM2936DTX-3.3/NOPB, LM2936QDT-3.3/NOPB, LM2936QDTX-3.3/NOPB) provide only 50mA output current. They are not suitable for applications requiring 500mA. Use these only if your application current requirement is 50mA or less.

Q: What is the significance of "Last Time Buy" status for TL760M33QKVURQ1?

A: Last Time Buy indicates this part will be discontinued. While currently available, long-term supply cannot be guaranteed. For new designs or long-term production, consider TLE42744DV33ATMA1 (Active status) as the preferred alternative.

Q: Do all substitute parts have identical pin configurations?

A: Yes. All substitute parts use TO-252-3 (DPAK) packaging with identical pin configuration: Pin 1 (Input), Pin 2 (Ground), Pin 3 (Output). Direct PCB footprint compatibility is maintained.

Q: Which substitute offers the best thermal performance?

A: TLE42744DV33ATMA1 and NCV4274ADT33RKG support extended operating temperature to 150°C compared to 125°C for other options. TLE42744DV33ATMA1 is the active, qualified choice.

Q: Is RoHS3 compliance maintained across all substitutes?

A: Yes. All listed substitute parts maintain ROHS3 compliance, matching the BD3570FP-E2 specification.

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