LM2936MPX-3.0 Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The LM2936MPX-3.0 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 3V output at 50mA in SOT-223-4 surface mount packaging. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The LM2936 series provides ultra-low quiescent current operation suitable for battery-powered and low-power applications requiring stable 3V regulation with integrated protection features.

Key Parameters

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

Substitute Part Grouping Explanation

Substitute parts for the LM2936MPX-3.0 are classified based on strict electrical and mechanical parameter matching. All substitute candidates maintain identical specifications across the following critical parameters:

Output voltage: 3V fixed
Output current capability: 50mA
Input voltage rating: 40V maximum
Dropout voltage: 0.4V @ 50mA
Quiescent current: 15 µA
Protection features: Over Temperature, Reverse Polarity, Short Circuit
Operating temperature range: -40°C ~ 125°C
Package type: SOT-223-4
Mounting: Surface Mount

Substitutes are differentiated by product status (Active vs. Obsolete), packaging format (Bulk, Cut Tape, Tape & Reel), manufacturer designation, and compliance certifications. All listed substitutes are parametrically equivalent and pin-compatible.

Parameter Comparison

Part Number	Manufacturer	Product Status	Output Voltage	Output Current	Dropout Voltage	Quiescent Current	Package	Packaging Format	RoHS Status	Automotive Grade
LM2936MPX-3.0	Texas Instruments	Obsolete	3V	50mA	0.4V @ 50mA	15 µA	SOT-223-4	—	Non-compliant	No
LM2936MPX-3.0/NOPB	National Semiconductor	Active	3V	50mA	0.4V @ 50mA	15 µA	SOT-223-4	Bulk	—	No
LM2936MP-3.0/NOPB	Texas Instruments	Active	3V	50mA	0.4V @ 50mA	15 µA	SOT-223-4	Cut Tape & Digi-Reel / Tape & Reel	ROHS3 Compliant	No
LM2936QMP-3.0/NOPB	Texas Instruments	Active	3V	50mA	0.4V @ 50mA	15 µA	SOT-223-4	Tape & Reel	ROHS3 Compliant	Yes (AEC-Q100)
LM2936QMPX-3.0/NOPB	Texas Instruments	Active	3V	50mA	0.4V @ 50mA	15 µA	SOT-223-4	Tape & Reel	ROHS3 Compliant	Yes (AEC-Q100)

Engineering Selection Recommendations

For applications requiring the LM2936MPX-3.0, the following selection criteria apply:

Active Product Status Priority: LM2936MP-3.0/NOPB, LM2936QMP-3.0/NOPB, and LM2936QMPX-3.0/NOPB are all active products with ongoing manufacturer support, making them preferred over the obsolete original part.

RoHS Compliance: LM2936MP-3.0/NOPB, LM2936QMP-3.0/NOPB, and LM2936QMPX-3.0/NOPB are ROHS3 compliant, suitable for applications with environmental or regulatory compliance requirements.

Automotive Applications: LM2936QMP-3.0/NOPB and LM2936QMPX-3.0/NOPB carry AEC-Q100 automotive qualification, required for automotive-grade designs.

Packaging Format: Selection between Cut Tape, Digi-Reel, Tape & Reel, or Bulk depends on production volume and assembly line requirements. All formats maintain identical electrical performance.

Manufacturer Continuity: Texas Instruments variants (LM2936MP-3.0/NOPB, LM2936QMP-3.0/NOPB, LM2936QMPX-3.0/NOPB) provide direct manufacturer support. National Semiconductor variant (LM2936MPX-3.0/NOPB) is also active but represents a secondary source option.

Frequently Asked Questions (FAQ)

Q: Can LM2936MP-3.0/NOPB directly replace LM2936MPX-3.0?

A: Yes. Both parts are parametrically equivalent with identical electrical specifications, output voltage, current rating, dropout voltage, quiescent current, and SOT-223-4 packaging. The primary difference is product status (Active vs. Obsolete) and RoHS compliance.

Q: What is the difference between LM2936QMP-3.0/NOPB and LM2936QMPX-3.0/NOPB?

A: Both parts are electrically identical with AEC-Q100 automotive qualification and ROHS3 compliance. The difference lies in packaging format and inventory availability. Selection depends on production requirements and supply chain considerations.

Q: Are automotive-grade variants (LM2936QMP-3.0/NOPB, LM2936QMPX-3.0/NOPB) suitable for non-automotive applications?

A: Yes. Automotive-grade parts meet or exceed standard industrial specifications and are fully compatible with non-automotive designs. AEC-Q100 qualification indicates enhanced reliability testing and quality assurance.

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

A: No. Packaging format is a logistics and assembly consideration only. All formats contain identical die and electrical characteristics. Selection is based on production volume, assembly equipment compatibility, and supply chain requirements.

Q: Is the National Semiconductor LM2936MPX-3.0/NOPB equivalent to Texas Instruments variants?

A: Yes. The National Semiconductor part is parametrically equivalent with identical electrical specifications and SOT-223-4 packaging. It represents an alternative active source for the LM2936 3V regulator.

Q: What protection features are included in all LM2936 variants?

A: All listed parts include Over Temperature protection, Reverse Polarity protection, and Short Circuit protection. These features are consistent across all substitute options.

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