LM2936MP-3.0 Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The LM2936MP-3.0 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 3V output applications with 50mA current capacity in SOT-223-4 surface mount packaging. This part is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity. The LM2936 series provides ultra-low quiescent current operation suitable for battery-powered and low-power applications requiring stable 3V regulation across an input range up to 40V.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	3V
Output Current	50mA
Input Voltage (Max)	40V
Voltage Dropout (Max)	0.4V @ 50mA
Quiescent Current	15 µA
PSRR	60dB (120Hz)
Operating Temperature Range	-40°C ~ 125°C (TJ)
Package Type	SOT-223-4 (TO-261-4, TO-261AA)
Protection Features	Over Temperature, Reverse Polarity, Short Circuit
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitute parts for the LM2936MP-3.0 are qualified based on identical electrical and mechanical parameters: fixed 3V output, 50mA output current, 40V maximum input voltage, 0.4V maximum dropout voltage at 50mA, 15 µA quiescent current, 60dB PSRR at 120Hz, SOT-223-4 package, and identical protection features (Over Temperature, Reverse Polarity, Short Circuit). All substitutes maintain the same operating temperature range of -40°C to 125°C and surface mount configuration.

The primary distinction among substitutes is product status and compliance certification. The main part (LM2936MP-3.0) is obsolete with RoHS non-compliant status. Active alternatives include standard commercial grade parts and automotive-qualified variants with AEC-Q100 certification and ROHS3 compliance. Packaging configurations vary between Cut Tape, Tape & Reel, and Bulk options to accommodate different procurement and assembly requirements.

Parameter Comparison

Part Number	Manufacturer	Product Status	Output Voltage	Output Current	Input Voltage (Max)	Dropout Voltage (Max)	Quiescent Current	Package	RoHS Status	Automotive Grade
LM2936MP-3.0	Texas Instruments	Obsolete	3V	50mA	40V	0.4V @ 50mA	15 µA	SOT-223-4	Non-compliant	No
LM2936MP-3.0/NOPB	Texas Instruments	Active	3V	50mA	40V	0.4V @ 50mA	15 µA	SOT-223-4	ROHS3 Compliant	No
LM2936MPX-3.0/NOPB	National Semiconductor	Active	3V	50mA	40V	0.4V @ 50mA	15 µA	SOT-223-4	Not specified	No
LM2936QMP-3.0/NOPB	Texas Instruments	Active	3V	50mA	40V	0.4V @ 50mA	15 µA	SOT-223-4	ROHS3 Compliant	Yes (AEC-Q100)
LM2936QMPX-3.0/NOPB	Texas Instruments	Active	3V	50mA	40V	0.4V @ 50mA	15 µA	SOT-223-4	ROHS3 Compliant	Yes (AEC-Q100)

Engineering Selection Recommendations

For applications requiring direct replacement of the obsolete LM2936MP-3.0, the LM2936MP-3.0/NOPB provides identical electrical performance with active product status and ROHS3 compliance. This variant is suitable for general commercial applications where automotive qualification is not required.

For designs requiring automotive-grade components, both LM2936QMP-3.0/NOPB and LM2936QMPX-3.0/NOPB meet AEC-Q100 qualification standards with ROHS3 compliance. These variants are appropriate for automotive and mission-critical applications where reliability certification is specified.

The LM2936MPX-3.0/NOPB from National Semiconductor offers an active alternative with identical electrical specifications. Selection between Texas Instruments and National Semiconductor variants depends on existing supply chain relationships and procurement preferences, as all electrical and mechanical parameters remain equivalent.

Packaging format selection (Cut Tape, Tape & Reel, or Bulk) should align with assembly volume and inventory management requirements without affecting electrical performance or compatibility.

Frequently Asked Questions (FAQ)

Q: Can LM2936MP-3.0/NOPB directly replace the obsolete LM2936MP-3.0?

A: Yes. The LM2936MP-3.0/NOPB maintains identical electrical specifications (3V output, 50mA current, 0.4V dropout, 15 µA quiescent current) and SOT-223-4 package configuration. The primary difference is active product status and ROHS3 compliance versus the obsolete non-compliant original.

Q: What is the difference between commercial and automotive-qualified variants?

A: The LM2936QMP-3.0/NOPB and LM2936QMPX-3.0/NOPB variants include AEC-Q100 automotive qualification certification, indicating compliance with automotive reliability and testing standards. All electrical parameters remain identical to commercial variants. Automotive grades are required for automotive applications or designs with automotive-level reliability specifications.

Q: Are all substitute parts compatible with the same PCB layout?

A: Yes. All substitute parts use identical SOT-223-4 packaging (TO-261-4, TO-261AA case outline), ensuring pin-for-pin compatibility and identical PCB footprint requirements. No layout modifications are necessary when substituting between listed variants.

Q: Does packaging format (Cut Tape, Tape & Reel, Bulk) affect electrical performance?

A: No. Packaging format affects only procurement, handling, and assembly logistics. Electrical specifications, performance characteristics, and reliability remain identical regardless of packaging configuration selected.

Q: Which substitute should be selected for new designs?

A: For new commercial designs, LM2936MP-3.0/NOPB is recommended as the primary choice due to active status and ROHS3 compliance. For automotive applications, LM2936QMP-3.0/NOPB or LM2936QMPX-3.0/NOPB are required to meet automotive qualification standards.

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