LM2936DT-5.0 Equivalent & Substitute Parts

Part Overview

The LM2936DT-5.0 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 5V output at 50mA in a TO-252-3 surface mount package. This device is classified as Last Time Buy, indicating end-of-life status. Substitute parts are necessary to maintain design continuity and ensure long-term component availability for new production runs and field replacements.

Key Parameters

Parameter	LM2936DT-5.0
Manufacturer	Texas Instruments
Output Voltage (Fixed)	5V
Output Current	50mA
Input Voltage (Max)	40V
Dropout Voltage (Max)	0.4V @ 50mA
Quiescent Current	9 µA
Package	TO-252-3 (DPAK)
Operating Temperature	-40°C ~ 125°C (TJ)
Protection Features	Over Temperature, Reverse Polarity, Short Circuit
Product Status	Last Time Buy
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

Output voltage matching at 5V fixed
Output current capability equal to or greater than 50mA
Package compatibility with TO-252-3 (DPAK)
Input voltage rating of 36V or higher
Operating temperature range covering -40°C to 125°C
Surface mount mounting type
RoHS3 compliance

Substitute parts are grouped into two categories: direct replacements with identical 50mA output current, and higher-capacity alternatives with 100mA or greater output current that maintain electrical and mechanical compatibility.

Parameter Comparison

Part Number	Manufacturer	Output Current	Input Voltage (Max)	Dropout Voltage	Quiescent Current	Package	Product Status	RoHS Status
LM2936DT-5.0	Texas Instruments	50mA	40V	0.4V @ 50mA	9 µA	TO-252-3	Last Time Buy	ROHS3
LM2936DT-5.0/NOPB	Texas Instruments	50mA	40V	0.4V @ 50mA	9 µA	TO-252-3	Active	ROHS3
BD3571YFP-ME2	Rohm Semiconductor	500mA	36V	0.48V @ 200mA	50 µA	TO-252-3	Active	ROHS3
BD3571FP-E2	Rohm Semiconductor	500mA	36V	0.48V @ 200mA	30 µA	TO-252-3	Not For New Designs	ROHS3
IFX25001TFV50ATMA1	Infineon Technologies	400mA	40V	0.5V @ 250mA	220 µA	TO-252-3	Obsolete	ROHS3
LM2931ADT-5.0RKG	onsemi	100mA	26V	0.6V @ 100mA	1 mA	TO-252-3	Active	ROHS3
LM2931DT-5.0G	onsemi	100mA	26V	0.6V @ 100mA	1 mA	TO-252-3	Active	ROHS3
MC7805BDTRKG	onsemi	1A	35V	2V @ 1A (Typ)	8 mA	TO-252-3	Active	ROHS3
MC7805BDTG	onsemi	1A	35V	2V @ 1A (Typ)	8 mA	TO-252-3	Active	ROHS3
MC7805CDTRKG	onsemi	1A	35V	2V @ 1A (Typ)	6.5 mA	TO-252-3	Active	ROHS3
MC7805CDTG	onsemi	1A	35V	2V @ 1A (Typ)	6.5 mA	TO-252-3	Active	ROHS3

Engineering Selection Recommendations

Direct Replacement (Identical Specifications)

LM2936DT-5.0/NOPB is the primary substitute for LM2936DT-5.0. Both devices share identical electrical specifications with 50mA output current and 0.4V dropout voltage. The key difference is product status: LM2936DT-5.0/NOPB is Active, ensuring continued availability and manufacturing support. Both are ROHS3 compliant with MSL-1 moisture sensitivity rating.

Higher-Capacity Alternatives

BD3571YFP-ME2 from Rohm Semiconductor provides 500mA output current in the same TO-252-3 package with Active product status. This device is suitable for applications requiring higher current capacity while maintaining 5V fixed output and -40°C to 125°C operating range. Input voltage rating is 36V, which is acceptable for most applications requiring 40V maximum input.

LM2931ADT-5.0RKG and LM2931DT-5.0G from onsemi offer 100mA output current with improved PSRR of 90dB at 120Hz compared to the original 60dB specification. Both are Active products with ROHS3 compliance. Input voltage rating is limited to 26V, restricting use in applications requiring higher input voltage tolerance.

MC7805 series devices (MC7805BDTRKG, MC7805BDTG, MC7805CDTRKG, MC7805CDTG) from onsemi deliver 1A output current in TO-252-3 packages with Active product status. These are suitable for applications requiring significantly higher current capacity. Operating temperature range for MC7805CDTRKG and MC7805CDTG is 0°C to 125°C, which does not cover the full -40°C lower limit of the original device.

Parts to Avoid

IFX25001TFV50ATMA1 is classified as Obsolete and should not be selected for new designs. BD3571FP-E2 is marked Not For New Designs and is not recommended for production use.

Frequently Asked Questions (FAQ)

Q: Can LM2936DT-5.0/NOPB be used as a direct replacement?

A: Yes. LM2936DT-5.0/NOPB is electrically and mechanically identical to LM2936DT-5.0 with the same 50mA output current, 0.4V dropout voltage, and TO-252-3 package. The primary advantage is Active product status, ensuring continued supply.

Q: What is the difference between the MC7805 variants?

A: MC7805BDTRKG and MC7805BDTG are identical except for packaging: BDTRKG is Cut Tape & Digi-Reel format, while BDTG is Tube format. MC7805CDTRKG and MC7805CDTG are similar variants with improved PSRR (83dB vs 68dB) and lower quiescent current (6.5mA vs 8mA). All deliver 1A output current.

Q: Can I use a higher-current substitute like BD3571YFP-ME2 or MC7805BDTRKG?

A: Yes, higher-current devices are electrically compatible substitutes. The 500mA and 1A output ratings provide additional design margin. However, verify that your PCB layout and thermal management accommodate the potentially higher quiescent current and power dissipation characteristics of these alternatives.

Q: What is the input voltage limitation for LM2931 devices?

A: LM2931ADT-5.0RKG and LM2931DT-5.0G are rated for maximum 26V input, compared to 40V for the original LM2936DT-5.0. These devices are suitable only for applications with input voltages not exceeding 26V.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and suitable for applications requiring RoHS compliance.

Q: What is the operating temperature range difference for MC7805CDTRKG?

A: MC7805CDTRKG operates from 0°C to 125°C, whereas LM2936DT-5.0 operates from -40°C to 125°C. The MC7805CDTRKG does not support the full lower temperature range and should not be used in applications requiring -40°C operation.

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