LM2936QMP-3.3/NOPB Equivalent & Substitute Parts

Part Overview

The LM2936QMP-3.3/NOPB is a linear voltage regulator IC manufactured by Texas Instruments, designed to deliver a fixed 3.3V output at 50mA in a SOT-223-4 surface mount package. This device is classified as Active product status and is qualified to AEC-Q100 automotive standards. The regulator integrates protection features including over temperature, reverse polarity, and short circuit protection, making it suitable for automotive and industrial applications requiring stable 3.3V power delivery from input sources up to 40V.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained across the specified parameter range, allowing for design flexibility, supply chain optimization, or inventory management.

Substiute Parts

LM2936QMP-3.3/NOPB

Texas InstrumentsIn Stock: 1691LM2936QMP-3.3/NOPB Datasheet

Current PartRFQ

LM2936MP-3.3/NOPB

Texas InstrumentsIn Stock: 1000259LM2936MP-3.3/NOPB Datasheet

Parametric EquivalentRFQ

LM2936MPX-3.3/NOPB

Texas InstrumentsIn Stock: 2208LM2936MPX-3.3/NOPB Datasheet

Parametric EquivalentRFQ

MIC5233-3.3YS

Microchip TechnologyIn Stock: 25006MIC5233-3.3YS Datasheet

MFR RecommendedRFQ

MIC5233-3.3YS-TR

Microchip TechnologyIn Stock: 3452MIC5233-3.3YS-TR Datasheet

MFR RecommendedRFQ

NCV8664CST33T3G

onsemiIn Stock: 5197NCV8664CST33T3G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LM2936QMP-3.3/NOPB are classified into two categories based on electrical and mechanical compatibility:

Parametric Equivalents maintain identical electrical specifications across all critical parameters: 3.3V fixed output, 50mA output current, 40V maximum input voltage, 0.4V maximum dropout voltage at 50mA, 15µA quiescent current, SOT-223-4 package, and -40°C to 125°C operating temperature range. These parts are direct functional replacements with no design modifications required.

Manufacturer Recommended Alternatives provide enhanced performance in specific parameters while maintaining 3.3V output voltage and SOT-223 package compatibility. These parts exceed the minimum specifications of the main part in output current capability, input voltage rating, or protection features, allowing for upgraded designs or supply chain flexibility. Compatibility requires verification that the enhanced specifications do not introduce design conflicts in the target application.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Automotive AEC-Q100 Qualified): LM2936MP-3.3/NOPB and LM2936MPX-3.3/NOPB are parametric equivalents to the LM2936QMP-3.3/NOPB. Both maintain identical electrical specifications and SOT-223-4 package compatibility. The primary difference is packaging format: LM2936MP-3.3/NOPB is supplied in Cut Tape and Digi-Reel format, while LM2936MPX-3.3/NOPB is also available in Cut Tape and Digi-Reel format. Both parts are Active product status and ROHS3 compliant. Selection between these two depends on inventory availability and packaging requirements.

For Enhanced Performance (Non-Automotive Applications): NCV8664CST33T3G from onsemi provides increased output current capability (150mA versus 50mA), higher maximum input voltage (45V versus 40V), and extended operating temperature range to 150°C. This part maintains AEC-Q100 automotive qualification and ROHS3 compliance. The SOT-223 package is mechanically compatible with SOT-223-4 footprints. Selection is appropriate when higher current delivery or extended temperature operation is required.

For Cost Optimization (Non-Automotive Applications): MIC5233-3.3YS and MIC5233-3.3YS-TR from Microchip Technology offer 100mA output current capability with 3.3V fixed output. These parts are not AEC-Q100 qualified and have higher moisture sensitivity (MSL 3 versus MSL 1). Maximum input voltage is 36V, which is lower than the main part. Selection is appropriate for non-automotive applications where higher current delivery is beneficial and automotive qualification is not required.

Frequently Asked Questions (FAQ)

Q: Can LM2936MP-3.3/NOPB be used as a direct replacement for LM2936QMP-3.3/NOPB?

A: Yes. LM2936MP-3.3/NOPB is a parametric equivalent with identical electrical specifications: 3.3V output, 50mA current, 40V maximum input, 0.4V dropout voltage, and -40°C to 125°C operating range. The only difference is packaging format (Cut Tape & Digi-Reel versus Tape & Reel). No design modifications are required.

Q: What is the difference between LM2936MP-3.3/NOPB and LM2936MPX-3.3/NOPB?

A: Both parts are parametric equivalents with identical electrical specifications. The difference is in packaging and availability. LM2936MP-3.3/NOPB has higher inventory (1,000,200 pcs), while LM2936MPX-3.3/NOPB has lower inventory (2,118 pcs). Both are supplied in Cut Tape & Digi-Reel format.

Q: Can NCV8664CST33T3G replace LM2936QMP-3.3/NOPB in automotive applications?

A: Yes. NCV8664CST33T3G is AEC-Q100 qualified and maintains 3.3V output with SOT-223 package compatibility. It provides enhanced specifications: 150mA output current (versus 50mA), 45V maximum input (versus 40V), and -40°C to 150°C operating range. Design verification is required to confirm that enhanced specifications do not introduce conflicts.

Q: Why do MIC5233-3.3YS and MIC5233-3.3YS-TR have different moisture sensitivity levels than the main part?

A: MIC5233 series parts have MSL 3 (168 Hours) versus MSL 1 (Unlimited) for the LM2936 series. This indicates stricter moisture handling requirements during storage and assembly. For non-automotive applications, this is acceptable with proper moisture control procedures. For automotive applications requiring AEC-Q100 qualification, the LM2936 or NCV8664 series are preferred.

Q: What is the significance of the SOT-223-3 package used in MIC5233 parts versus SOT-223-4 in the main part?

A: SOT-223-3 has three pins (GND, IN, OUT) while SOT-223-4 has four pins (GND, IN, OUT, NC). Both packages are mechanically compatible with SOT-223-4 PCB footprints. The fourth pin in SOT-223-4 is typically not connected (NC) and does not affect electrical function. MIC5233 parts can be used as substitutes without PCB layout modifications.

Q: Is the higher quiescent current in MIC5233 and NCV8664 parts a concern?

A: MIC5233 series has 30µA quiescent current versus 15µA in LM2936, while NCV8664 has 29µA. For applications with continuous operation, this represents a 2mW increase in standby power consumption at 3.3V output. For battery-powered or low-power applications, this difference may be significant and should be evaluated against total system power budget.

Q: Can these substitute parts be used interchangeably in the same PCB design?

A: LM2936MP-3.3/NOPB and LM2936MPX-3.3/NOPB are direct interchangeable replacements. NCV8664CST33T3G is mechanically compatible but requires design verification due to enhanced specifications. MIC5233 series parts require verification of quiescent current and moisture sensitivity requirements for the target application. PCB footprint compatibility exists across all parts in the SOT-223 family.