LM2937ES-5.0 Equivalent & Substitute Parts

Part Overview

The LM2937ES-5.0 is a linear voltage regulator IC from Texas Instruments, delivering a fixed 5V output at 500mA in a TO-263 (DDPAK-3) surface mount package. This device is classified as Last Time Buy, indicating end-of-life status. Finding equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain flexibility, and support long-term production requirements for applications requiring 5V regulation in compact form factors.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	5V
Output Current	500mA
Input Voltage (Max)	26V
Voltage Dropout (Max)	1V @ 500mA
Quiescent Current	10 mA
Operating Temperature Range	-40°C to 125°C
Package Type	TO-263 (DDPAK-3)
Protection Features	Mirror-Image Insertion, Over Temperature, Short Circuit, Transient Voltage
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the LM2937ES-5.0 is determined by the following critical parameters:

Fixed 5V output voltage
Output current capability (500mA minimum)
Maximum input voltage tolerance (26V or higher)
TO-263 package compatibility (mechanical and thermal)
Operating temperature range (-40°C to 125°C)
RoHS3 compliance and REACH unaffected status

Substitute parts are grouped into two categories:

Direct Equivalents (Pin-Compatible, Same Current Rating): Parts with identical 500mA output current and TO-263 packaging, suitable for direct replacement without circuit modification.

Higher Current Alternatives (Pin-Compatible, Enhanced Performance): Parts with 750mA, 1A, 1.5A, or 3A output current ratings in TO-263 packaging. These provide increased current headroom and lower dropout voltage while maintaining mechanical and electrical compatibility.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Input Voltage (Max)	Dropout Voltage (Max)	Package	Product Status
LM2937ES-5.0	Texas Instruments	5V	500mA	26V	1V @ 500mA	TO-263 (DDPAK-3)	Last Time Buy
LM2937ES-5.0/NOPB	Texas Instruments	5V	500mA	26V	1V @ 500mA	TO-263 (DDPAK-3)	Active
MIC5237-5.0YU	Microchip Technology	5V	500mA	16V	0.7V @ 500mA	TO-263 (DDPAK-3)	Active
MIC5237-5.0YU-TR	Microchip Technology	5V	500mA	16V	0.7V @ 500mA	TO-263 (DDPAK-3)	Active
MIC2937A-5.0WU	Microchip Technology	5V	750mA	26V	Not specified	TO-263 (DDPAK-3)	Active
MIC2937A-5.0WU-TR	Microchip Technology	5V	750mA	26V	0.75V @ 750mA	TO-263 (DDPAK-3)	Active
MIC29150-5.0WU	Microchip Technology	5V	1.5A	26V	0.6V @ 1.5A	TO-263 (DDPAK-3)	Active
MIC29150-5.0WU-TR	Microchip Technology	5V	1.5A	26V	0.6V @ 1.5A	TO-263 (DDPAK-3)	Active
MIC29300-5.0WU	Microchip Technology	5V	3A	26V	0.6V @ 3A	TO-263 (DDPAK-3)	Active
MIC29300-5.0WU-TR	Microchip Technology	5V	3A	26V	0.6V @ 3A	TO-263 (DDPAK-3)	Active
MC7805ABD2TR4G	onsemi	5V	1A	35V	2V @ 1A (Typ)	D2PAK-3 (TO-263-3)	Active

Engineering Selection Recommendations

For Direct Replacement (Same Current Rating):

LM2937ES-5.0/NOPB from Texas Instruments is the primary direct equivalent. This part maintains identical electrical specifications and packaging while offering Active product status, ensuring continued availability and support. MIC5237-5.0YU and MIC5237-5.0YU-TR from Microchip Technology are functionally equivalent alternatives with improved dropout voltage (0.7V vs 1V), though maximum input voltage is limited to 16V. Both are ROHS3 compliant and Active status.

For Enhanced Performance (Higher Current Capability):

MIC2937A-5.0WU-TR, MIC29150-5.0WU-TR, and MIC29300-5.0WU-TR from Microchip Technology provide 750mA, 1.5A, and 3A output current respectively, all with superior dropout voltage characteristics and Active product status. These are suitable when design margins require higher current capacity or lower thermal dissipation. All maintain 26V maximum input voltage and TO-263 packaging compatibility.

For Extended Input Voltage Range:

MC7805ABD2TR4G from onsemi supports 35V maximum input voltage (vs 26V for LM2937ES-5.0) and delivers 1A output current. This part uses D2PAK-3 packaging (mechanically compatible with TO-263-3) and is Active status. Dropout voltage is higher at 2V typical, requiring thermal management consideration in power-limited applications.

All recommended substitutes maintain ROHS3 compliance, REACH unaffected status, and operating temperature range of -40°C to 125°C.

Frequently Asked Questions (FAQ)

Q: Can MIC5237-5.0YU replace LM2937ES-5.0 directly?

A: Yes, for applications where input voltage does not exceed 16V. Both deliver 500mA at 5V output in TO-263 packaging. MIC5237-5.0YU offers lower dropout voltage (0.7V vs 1V), reducing thermal dissipation. If your design requires the full 26V input range of the original part, use MIC2937A-5.0WU-TR instead.

Q: What is the difference between tube and tape & reel packaging?

A: Tube packaging (YU, WU suffix) is suitable for manual assembly and lower-volume production. Tape & Reel packaging (YU-TR, WU-TR, TR suffix) is optimized for automated pick-and-place assembly and high-volume manufacturing. Electrical specifications are identical; selection depends on assembly process requirements.

Q: Can I use MIC29300-5.0WU-TR (3A) instead of LM2937ES-5.0 (500mA)?

A: Yes. MIC29300-5.0WU-TR is pin-compatible in TO-263 packaging and delivers the same 5V output. The higher 3A current rating provides design margin and lower dropout voltage (0.6V vs 1V), improving efficiency. No circuit modification is required. This substitution is beneficial for applications approaching the 500mA limit or requiring reduced thermal dissipation.

Q: Why is MC7805ABD2TR4G listed as a substitute if it has higher dropout voltage?

A: MC7805ABD2TR4G is included as an alternative for applications requiring extended input voltage tolerance (35V vs 26V). The higher 2V dropout voltage is a trade-off; this part is suitable only when input voltage headroom is available and thermal management is adequate. For standard 26V input designs, Microchip MIC series parts are preferred.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and REACH unaffected, matching the compliance status of LM2937ES-5.0.

Q: What does "Last Time Buy" status mean for LM2937ES-5.0?

A: Last Time Buy indicates Texas Instruments has discontinued this part and set a final order deadline. Existing inventory is available, but no new production will occur. Substitution planning is necessary for long-term production continuity. LM2937ES-5.0/NOPB (Active status) or Microchip alternatives are recommended for new designs.

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