LM4050BEM3-10 Equivalent & Substitute Parts

Part Overview

The LM4050BEM3-10 is a shunt voltage reference IC manufactured by Texas Instruments, designed for precision voltage reference applications requiring fixed 10V output. This component belongs to the Power Management (PMIC) category and is packaged in SOT-23-3 surface mount configuration. The main part number is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Reference Type	Shunt
Output Type	Fixed
Voltage - Output (Min/Fixed)	10V
Current - Output	15 mA
Tolerance	±0.2%
Temperature Coefficient	50ppm/°C
Noise - 10Hz to 10kHz	150µVrms
Current - Cathode	110 µA (main part)
Operating Temperature	-40°C ~ 125°C (TA)
Package / Case	TO-236-3, SC-59, SOT-23-3
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution for the LM4050BEM3-10 is determined by strict equivalence across the following critical parameters:

Reference Type: Shunt
Output Type: Fixed
Voltage - Output: 10V
Current - Output: 15 mA
Tolerance: ±0.2%
Temperature Coefficient: 50ppm/°C
Noise - 10Hz to 10kHz: 150µVrms
Operating Temperature: -40°C ~ 125°C
Package / Case: SOT-23-3

All substitute parts listed maintain these electrical and mechanical specifications. Variations in product status, packaging format (bulk vs. tape & reel), RoHS compliance, and cathode current within acceptable ranges do not affect functional substitutability.

Parameter Comparison

Part Number	Manufacturer	Product Status	Voltage Output	Current Output	Tolerance	Temp Coeff	Cathode Current	Package	RoHS Status	Packaging Format
LM4050BEM3-10	Texas Instruments	Obsolete	10V	15 mA	±0.2%	50ppm/°C	110 µA	SOT-23-3	Non-compliant	Bulk
LM4050BEM3-10/NOPB	Texas Instruments	Active	10V	15 mA	±0.2%	50ppm/°C	110 µA	SOT-23-3	ROHS3 Compliant	Tape & Reel
LM4050BEM3X-10/NOPB	National Semiconductor	Active	10V	15 mA	±0.2%	50ppm/°C	110 µA	SOT-23-3	Not specified	Bulk
LM4050QBEM3-10/NOPB	Texas Instruments	Last Time Buy	10V	15 mA	±0.2%	50ppm/°C	110 µA	SOT-23-3	ROHS3 Compliant	Tape & Reel
LM4050QBIM3-10/NOPB	Texas Instruments	Last Time Buy	10V	15 mA	±0.2%	50ppm/°C	103 µA	SOT-23-3	ROHS3 Compliant	Tape & Reel
TL4050B10QDBZR	Texas Instruments	Active	10V	15 mA	±0.2%	50ppm/°C	110 µA	SOT-23-3	ROHS3 Compliant	Tape & Reel
TL4050B10QDBZT	Texas Instruments	Active	10V	15 mA	±0.2%	50ppm/°C	110 µA	SOT-23-3	ROHS3 Compliant	Tape & Reel

Engineering Selection Recommendations

For designs currently using the obsolete LM4050BEM3-10, the following selection criteria apply:

Primary Recommendation: LM4050BEM3-10/NOPB is the direct functional equivalent with active product status and ROHS3 compliance. This part maintains identical electrical specifications and SOT-23-3 packaging while offering improved compliance posture.

Alternative for Automotive Applications: LM4050QBEM3-10/NOPB provides automotive-grade qualification (AEC-Q100) with Last Time Buy status. This variant is suitable for automotive and high-reliability applications requiring certified components.

Secondary Alternatives: TL4050B10QDBZR and TL4050B10QDBZT are active Texas Instruments products with identical electrical parameters and ROHS3 compliance. These represent alternative product lines within the same manufacturer ecosystem.

Legacy Compatibility: LM4050BEM3X-10/NOPB (National Semiconductor) and LM4050QBIM3-10/NOPB maintain full electrical equivalence. The latter includes automotive qualification but carries Last Time Buy status.

Selection should prioritize active product status for long-term supply assurance and ROHS3 compliance for regulatory alignment.

Frequently Asked Questions (FAQ)

Q: Can LM4050BEM3-10/NOPB directly replace the obsolete LM4050BEM3-10?

A: Yes. Both parts are electrically and mechanically identical. The primary difference is product status (active vs. obsolete) and packaging format (tape & reel vs. bulk). The /NOPB designation indicates lead-free, ROHS3-compliant manufacturing.

Q: What is the difference between LM4050QBEM3-10/NOPB and LM4050QBIM3-10/NOPB?

A: Both are automotive-qualified variants with AEC-Q100 certification. The primary difference is cathode current: LM4050QBEM3-10/NOPB specifies 110 µA while LM4050QBIM3-10/NOPB specifies 103 µA. Both maintain the same output voltage, tolerance, and temperature coefficient.

Q: Are TL4050B10QDBZR and TL4050B10QDBZT interchangeable?

A: Yes. Both are active Texas Instruments products with identical electrical specifications, ROHS3 compliance, and SOT-23-3 packaging. The difference lies in packaging format designation only.

Q: Does the cathode current variation between parts affect substitutability?

A: No. The cathode current specification (103 µA to 110 µA) falls within acceptable operating ranges for shunt voltage reference applications. This parameter does not determine functional substitutability for the defined output voltage, tolerance, and temperature coefficient.

Q: Which substitute part offers the best long-term availability?

A: TL4050B10QDBZR and TL4050B10QDBZT carry active product status, indicating ongoing production and supply. LM4050BEM3-10/NOPB also maintains active status. Parts designated Last Time Buy (LM4050QBEM3-10/NOPB and LM4050QBIM3-10/NOPB) have limited production windows.

Q: Is ROHS3 compliance required for my application?

A: ROHS3 compliance is mandatory for products sold in the European Union and many other regulated markets. All active substitute parts listed carry ROHS3 compliance. The original LM4050BEM3-10 is non-compliant and should not be used in new designs targeting regulated markets.

Q: Can I mix packaging formats (bulk vs. tape & reel) in production?

A: Packaging format selection depends on assembly process requirements. Tape & reel format is standard for automated pick-and-place assembly. Bulk packaging is suitable for manual assembly or lower-volume applications. Electrical performance is identical regardless of packaging format.

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