LM4120IM5X-5.0 Equivalent & Substitute Parts

Part Overview

The LM4120IM5X-5.0 is a Series Voltage Reference IC with fixed 5V output, designed for precision power management applications requiring stable reference voltages. This component features ±0.5% output tolerance and operates across a -40°C to 85°C temperature range in a surface-mount SOT-23-5 package.

The LM4120IM5X-5.0 is classified as Obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this voltage reference topology.

Substiute Parts

LM4120IM5X-5.0

Texas InstrumentsIn Stock: 3364LM4120IM5X-5.0 Datasheet

Current PartRFQ

LM4120IM5-5.0/NOPB

National SemiconductorIn Stock: 3089LM4120IM5-5.0/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LM4120IM5X-5.0 are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Critical Matching Parameters:

• Output Voltage: 5V (Fixed)
• Output Current: 5 mA
• Tolerance: ±0.5%
• Temperature Coefficient: 50 ppm/°C
• Noise Specifications: 20 µVp-p (0.1Hz to 10Hz) and 36 µVp-p (10Hz to 10kHz)
• Input Voltage Range: 2V ~ 12V
• Supply Current: 275 µA
• Operating Temperature Range: -40°C ~ 85°C (TA)
• Package / Case: SC-74A, SOT-753
• Supplier Device Package: SOT-23-5
• Mounting Type: Surface Mount

The LM4120IM5-5.0/NOPB meets all specified electrical and mechanical parameters, making it a parametric equivalent for the obsolete LM4120IM5X-5.0.

Parameter Comparison

Engineering Selection Recommendations

The LM4120IM5-5.0/NOPB is a direct parametric equivalent to the obsolete LM4120IM5X-5.0. All electrical specifications, mechanical dimensions, and thermal characteristics are identical. The substitute part carries Active product status, ensuring continued availability and supply chain support.

The LM4120IM5X-5.0 is RoHS non-compliant, while compliance status for the substitute part is not specified in available documentation. Design teams should verify RoHS compliance requirements against project specifications before final component selection.

Both parts share identical packaging (SOT-23-5), pinout configuration, and thermal performance characteristics, enabling direct board-level substitution without circuit redesign.

Frequently Asked Questions (FAQ)

Q: Can the LM4120IM5-5.0/NOPB be used as a direct replacement for the LM4120IM5X-5.0?

A: Yes. The LM4120IM5-5.0/NOPB meets all electrical and mechanical specifications of the LM4120IM5X-5.0, including output voltage, tolerance, temperature coefficient, noise performance, and package configuration. Direct substitution is supported without circuit modification.

Q: What is the difference between the LM4120IM5X-5.0 and LM4120IM5-5.0/NOPB?

A: The primary difference is product status. The LM4120IM5X-5.0 is Obsolete, while the LM4120IM5-5.0/NOPB is Active. All electrical and mechanical parameters are identical. The "/NOPB" suffix indicates lead-free (Pb-free) packaging compliance.

Q: Are there any package or pinout differences between these parts?

A: No. Both parts use the SOT-23-5 package with SC-74A and SOT-753 case designations. Pinout and physical dimensions are identical, supporting direct PCB-level substitution.

Q: What is the temperature coefficient specification, and why is it important?

A: Both parts specify 50 ppm/°C temperature coefficient. This parameter defines the output voltage drift per degree Celsius change in operating temperature. Identical specifications ensure equivalent thermal stability across the -40°C to 85°C operating range.

Q: Can these parts be used interchangeably in high-precision applications?

A: Yes. Both parts maintain ±0.5% output tolerance and identical noise specifications (20 µVp-p from 0.1Hz to 10Hz, 36 µVp-p from 10Hz to 10kHz), supporting equivalent performance in precision voltage reference applications.

Q: What is the maximum output current for these voltage reference ICs?

A: Both parts are rated for 5 mA maximum output current. Applications requiring higher output current must employ external buffering or alternative reference topologies.