LM2936MP-3.3 Equivalent & Substitute Parts

Part Overview

The LM2936MP-3.3 is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. It delivers a fixed positive 3.3V output at 50mA in a SOT-223-4 surface mount package. The main part is currently in Last Time Buy status, indicating end-of-life production. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications requiring this voltage regulation function.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	3.3V
Output Current	50mA
Input Voltage (Max)	40V
Voltage Dropout (Max)	0.4V @ 50mA
Quiescent Current	15 µA
Package	SOT-223-4
Operating Temperature Range	-40°C ~ 125°C
Protection Features	Over Temperature, Reverse Polarity, Short Circuit
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the LM2936MP-3.3 are classified into two categories based on electrical and mechanical compatibility:

Parametric Equivalents (Texas Instruments LM2936 Series): These parts maintain identical electrical specifications including 3.3V fixed output, 50mA output current, 40V maximum input voltage, 0.4V dropout voltage, and SOT-223-4 packaging. Differences exist only in packaging format (Cut Tape vs. Tape & Reel) and product status (Active vs. Last Time Buy). Parts in this category are direct functional replacements with no design modifications required.

Manufacturer Recommended Alternatives (onsemi NCV Series): These parts share the same output voltage (3.3V), package family (SOT-223), and protection features, but differ in output current capability and other electrical parameters. Selection from this category requires design review to confirm compatibility with application current requirements.

Key parameters determining substitution eligibility:

Output voltage: 3.3V (fixed)
Package type: SOT-223-4 or SOT-223
Protection features: Over Temperature, Reverse Polarity, Short Circuit
RoHS3 compliance
Operating temperature range compatibility

Parameter Comparison

Part Number	Manufacturer	Output Current	Input Voltage (Max)	Dropout Voltage (Max)	Quiescent Current	Operating Temp	Packaging	Product Status
LM2936MP-3.3	Texas Instruments	50mA	40V	0.4V @ 50mA	15 µA	-40°C ~ 125°C	Cut Tape	Last Time Buy
LM2936MP-3.3/NOPB	Texas Instruments	50mA	40V	0.4V @ 50mA	15 µA	-40°C ~ 125°C	Cut Tape	Active
LM2936MPX-3.3/NOPB	Texas Instruments	50mA	40V	0.4V @ 50mA	15 µA	-40°C ~ 125°C	Cut Tape	Active
LM2936QMP-3.3/NOPB	Texas Instruments	50mA	40V	0.4V @ 50mA	15 µA	-40°C ~ 125°C	Tape & Reel	Active
LM2936QMPX-3.3/NOPB	Texas Instruments	50mA	40V	0.4V @ 50mA	15 µA	-40°C ~ 125°C	Tape & Reel	Active
NCV8664CST33T3G	onsemi	150mA	45V	Not specified	29 µA	-40°C ~ 150°C	Cut Tape	Active
NCV4274AST33T3G	onsemi	400mA	40V	1.27V @ 250mA	250 µA	-40°C ~ 150°C	Cut Tape	Active

Engineering Selection Recommendations

For Direct Replacement (No Design Changes): Select from the Texas Instruments LM2936 series parametric equivalents: LM2936MP-3.3/NOPB, LM2936MPX-3.3/NOPB, LM2936QMP-3.3/NOPB, or LM2936QMPX-3.3/NOPB. All maintain identical electrical performance and are ROHS3 compliant with Active product status. Choose based on packaging preference: Cut Tape variants for lower volume applications, Tape & Reel variants for automated assembly. The automotive-qualified variants (QMP and QMPX) include AEC-Q100 certification if required by application standards.

For Applications Requiring Higher Output Current: The onsemi NCV8664CST33T3G provides 150mA output current with improved PSRR (67dB vs. 60dB) and extended operating temperature range (-40°C ~ 150°C). This part is suitable for designs where the 50mA limit of the LM2936MP-3.3 is insufficient. The NCV4274AST33T3G offers 400mA output current for higher power applications, though it exhibits higher dropout voltage (1.27V @ 250mA) and quiescent current (250 µA) compared to the original part.

Compliance Considerations: All substitute parts maintain ROHS3 compliance and are manufactured by established semiconductor suppliers with Active product status, ensuring long-term availability and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can I use LM2936QMP-3.3/NOPB as a direct replacement for LM2936MP-3.3?

A: Yes. Both parts are electrically identical with 50mA output current, 3.3V fixed output, and SOT-223-4 packaging. The difference is packaging format: LM2936MP-3.3 uses Cut Tape, while LM2936QMP-3.3/NOPB uses Tape & Reel. Select based on your assembly process requirements.

Q: What is the difference between the automotive-qualified variants (QMP/QMPX) and standard variants (MP/MPX)?

A: The automotive-qualified variants (LM2936QMP-3.3/NOPB and LM2936QMPX-3.3/NOPB) include AEC-Q100 certification, meeting automotive industry reliability standards. Electrical specifications remain identical. Use automotive variants only if your application requires AEC-Q100 compliance.

Q: Can I substitute NCV8664CST33T3G for LM2936MP-3.3 without circuit modifications?

A: NCV8664CST33T3G is electrically compatible for the 3.3V output and SOT-223 package, but provides 150mA output current versus 50mA. No circuit modifications are required if your application current demand does not exceed 50mA. However, the higher quiescent current (29 µA vs. 15 µA) may affect low-power standby performance.

Q: Why is NCV4274AST33T3G listed as a substitute if it has higher dropout voltage?

A: NCV4274AST33T3G is listed as a manufacturer-recommended alternative for applications requiring higher output current (400mA). The 1.27V dropout voltage at 250mA is higher than the LM2936MP-3.3 (0.4V @ 50mA), requiring design review to confirm input voltage headroom is sufficient for your application.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, ensuring compatibility with environmental and regulatory requirements.

Q: What packaging options are available for the LM2936 series?

A: Texas Instruments LM2936 series is available in two packaging formats: Cut Tape (CT) for lower volume or manual assembly applications, and Tape & Reel (TR) for automated high-volume production. Electrical specifications are identical across both formats.

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