TL4051BQDCKT Equivalent & Substitute Parts

Part Overview

The TL4051BQDCKT is a shunt voltage reference IC manufactured by Texas Instruments, designed for precision micropower applications requiring adjustable output voltage. This component operates as an adjustable shunt regulator with a fixed output voltage of 1.212V and maximum output of 10V, delivering 12mA output current with ±0.2% tolerance. The part is packaged in SC-70-5 (5-TSSOP, SOT-353) surface mount configuration.

The TL4051BQDCKT is discontinued at DiGi Electronics. Equivalent and substitute parts are available from active product lines that maintain compatible electrical and mechanical specifications, enabling direct replacement in existing designs.

Substiute Parts

TL4051BQDCKT

Texas InstrumentsIn Stock: 781TL4051BQDCKT Datasheet

Current PartRFQ

LM4041CIM7-ADJ/NOPB

National SemiconductorIn Stock: 15017LM4041CIM7-ADJ/NOPB Datasheet

MFR RecommendedRFQ

LM4041CIM7X-ADJ/NOPB

Texas InstrumentsIn Stock: 3321LM4041CIM7X-ADJ/NOPB Datasheet

MFR RecommendedRFQ

LM4041DIM7-ADJ/NOPB

Texas InstrumentsIn Stock: 8317LM4041DIM7-ADJ/NOPB Datasheet

MFR RecommendedRFQ

LM4041DIM7X-ADJ/NOPB

Texas InstrumentsIn Stock: 6731LM4041DIM7X-ADJ/NOPB Datasheet

MFR RecommendedRFQ

TL4051BQDCKR

Texas InstrumentsIn Stock: 5061TL4051BQDCKR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TL4051BQDCKT is determined by the following critical parameters:

Mechanical Compatibility: All substitute parts must use the SC-70-5 (5-TSSOP, SOT-353) package for direct PCB footprint compatibility.

Electrical Core Requirements: All parts must function as adjustable shunt voltage reference ICs with 12mA output current capability and 10V maximum output voltage.

Tolerance and Temperature Performance: Substitute parts are grouped by tolerance specification (±0.2%, ±0.5%, ±1%) and temperature coefficient (50ppm/°C, 100ppm/°C, 150ppm/°C). Parts with tighter tolerance and lower temperature coefficient provide equivalent or superior performance.

Operating Temperature Range: The TL4051BQDCKT operates from -40°C to 125°C. Substitute parts operating within -40°C to 85°C are acceptable for applications not requiring the extended upper temperature range.

Compliance: All substitute parts maintain ROHS3 compliance and EAR99 export classification.

Parameter Comparison

Engineering Selection Recommendations

Direct Parametric Equivalent: TL4051BQDCKR is the primary substitute, offering identical electrical specifications (1.212V output, ±0.2% tolerance, 50ppm/°C temperature coefficient) and extended operating temperature range (-40°C to 125°C). This part is manufactured by Texas Instruments and maintains active product status with ROHS3 compliance. The only difference is packaging format (Tape & Reel vs. Bulk), which does not affect electrical performance.

Functional Equivalents with Relaxed Tolerance: LM4041CIM7-ADJ/NOPB and LM4041CIM7X-ADJ/NOPB provide functional substitution with ±0.5% tolerance and 100ppm/°C temperature coefficient. These parts are suitable for applications where the relaxed tolerance specification is acceptable. Both maintain 12mA output current and SC-70-5 packaging. Operating temperature is limited to -40°C to 85°C.

Functional Equivalents with Relaxed Tolerance and Temperature Coefficient: LM4041DIM7-ADJ/NOPB and LM4041DIM7X-ADJ/NOPB offer substitution with ±1% tolerance and 150ppm/°C temperature coefficient. These parts are appropriate for applications with less stringent precision requirements. Both maintain 12mA output current and SC-70-5 packaging with active product status and ROHS3 compliance. Operating temperature is limited to -40°C to 85°C.

All substitute parts maintain ROHS3 compliance and EAR99 export classification, ensuring regulatory compatibility with the original design.

Frequently Asked Questions (FAQ)

Q: Can TL4051BQDCKR directly replace TL4051BQDCKT without circuit modification?

A: Yes. TL4051BQDCKR is a parametric equivalent with identical electrical specifications (1.212V output, ±0.2% tolerance, 50ppm/°C temperature coefficient, 12mA output current) and SC-70-5 packaging. The only difference is packaging format (Tape & Reel vs. Bulk), which does not affect circuit performance or PCB layout.

Q: What is the difference between the LM4041 and TL4051 series substitutes?

A: Both series function as adjustable shunt voltage reference ICs in SC-70-5 packaging. The LM4041 series offers multiple tolerance grades (±0.5% and ±1%), while the TL4051BQDCKR maintains the original ±0.2% tolerance specification. Selection depends on application precision requirements.

Q: Are the LM4041 parts with ±0.5% and ±1% tolerance acceptable substitutes?

A: LM4041 parts with relaxed tolerance specifications are acceptable substitutes only if the application design tolerates the increased output voltage variation. The ±0.5% tolerance (LM4041CIM7-ADJ/NOPB, LM4041CIM7X-ADJ/NOPB) and ±1% tolerance (LM4041DIM7-ADJ/NOPB, LM4041DIM7X-ADJ/NOPB) parts maintain identical output current (12mA), package (SC-70-5), and noise performance (20µVrms).

Q: What is the impact of the reduced operating temperature range in LM4041 substitutes?

A: LM4041 parts operate from -40°C to 85°C, compared to the TL4051BQDCKT range of -40°C to 125°C. If the application requires operation above 85°C, use TL4051BQDCKR, which maintains the extended temperature range. For applications operating within -40°C to 85°C, LM4041 parts are fully compatible.

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

A: No. Packaging format affects only supply and handling logistics. Electrical specifications and PCB footprint compatibility remain identical across all packaging options for the same part number base.

Q: Are all substitute parts ROHS3 compliant?

A: TL4051BQDCKR, LM4041CIM7X-ADJ/NOPB, LM4041DIM7-ADJ/NOPB, and LM4041DIM7X-ADJ/NOPB are confirmed ROHS3 compliant. LM4041CIM7-ADJ/NOPB RoHS status is not specified in available documentation.