LM2832XSD Buck Switching Regulator IC Equivalent & Substitute Parts

Part Overview

The LM2832XSD is a buck switching regulator IC manufactured by Texas Instruments, designed for positive adjustable output applications with 2A output current capability. This device operates as a step-down converter with a single adjustable output, suitable for power management applications requiring input voltages between 3V and 5.5V.

The LM2832XSD is classified as obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production requirements for applications currently utilizing this component.

Substiute Parts

LM2832XSD

Texas InstrumentsIn Stock: 30456LM2832XSD Datasheet

Current PartRFQ

LM2832XSD/NOPB

Texas InstrumentsIn Stock: 2065LM2832XSD/NOPB Datasheet

DirectRFQ

ST1S09IPUR

STMicroelectronicsIn Stock: 6799ST1S09IPUR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LM2832XSD are identified based on functional equivalence within the following critical parameters:

Functional Equivalence Criteria:

• Function: Step-Down (Buck) topology
• Output Configuration: Positive adjustable output
• Number of Outputs: Single output
• Output Current: 2A capability
• Mounting Type: Surface Mount
• Package Form Factor: 6-pin DFN/WSON with exposed pad (3x3mm footprint)

Allowed Parameter Variations:

• Input voltage range may extend beyond the original specification
• Output voltage range may extend beyond the original specification
• Switching frequency may vary within industry-standard ranges (1.5MHz to 1.6MHz)
• Operating temperature range may differ
• Synchronous rectifier presence is not a disqualifying factor
• RoHS compliance status may differ

Substitute Categories:

Direct Equivalent (Packaging Variant): LM2832XSD/NOPB - Identical electrical specifications with different packaging format (Tape & Reel vs. standard packaging).

Functional Equivalent (Cross-Manufacturer): ST1S09IPUR - Meets core functional requirements with allowable parameter variations in input/output voltage ranges, switching frequency, and temperature operating range.

Parameter Comparison

Engineering Selection Recommendations

LM2832XSD/NOPB is the primary direct substitute for LM2832XSD. Both devices share identical electrical specifications and package form factor. The LM2832XSD/NOPB maintains active product status with ROHS3 compliance, addressing the obsolescence of the original part while preserving full electrical and mechanical compatibility. This substitute is suitable for direct replacement in existing designs without circuit modification.

ST1S09IPUR is a functional equivalent from STMicroelectronics suitable for applications where the extended input voltage range (2.7V to 6V) and higher maximum output voltage (5.22V) provide design flexibility. The ST1S09IPUR includes an integrated synchronous rectifier, which may improve efficiency in certain applications. This device maintains active product status and ROHS3 compliance. The operating temperature range is narrower (-30°C to 85°C) compared to the original specification. The 6-VDFN package is mechanically compatible with the 6-WSON footprint for surface mount applications.

Selection between these substitutes depends on supply chain availability, compliance requirements, and specific application voltage and temperature constraints.

Frequently Asked Questions (FAQ)

Q: Can LM2832XSD/NOPB be used as a direct replacement for LM2832XSD?

A: Yes. LM2832XSD/NOPB is a direct equivalent with identical electrical specifications, output current rating, switching frequency, and package form factor. The primary difference is packaging format (Tape & Reel). Both devices are pin-compatible and require no circuit modifications.

Q: What are the key differences between LM2832XSD and ST1S09IPUR?

A: The ST1S09IPUR extends the input voltage range to 2.7V minimum and 6V maximum, compared to 3V to 5.5V for the LM2832XSD. The output voltage range extends to 5.22V maximum. The ST1S09IPUR includes a synchronous rectifier, while the LM2832XSD does not. Operating temperature range is -30°C to 85°C for the ST1S09IPUR versus -40°C to 125°C for the LM2832XSD. Both maintain 2A output current and 1.5MHz to 1.6MHz switching frequency.

Q: Are the package footprints compatible between LM2832XSD and ST1S09IPUR?

A: Both devices use 6-pin DFN packages with 3x3mm footprints and exposed pads. The LM2832XSD uses 6-WSON packaging while the ST1S09IPUR uses 6-VDFN packaging. These packages are mechanically compatible for surface mount PCB assembly, though pin configuration must be verified against device datasheets.

Q: What is the impact of the ST1S09IPUR's narrower operating temperature range?

A: The ST1S09IPUR operates from -30°C to 85°C, compared to -40°C to 125°C for the LM2832XSD. Applications requiring operation below -30°C or above 85°C must use the LM2832XSD or LM2832XSD/NOPB. Applications within the -30°C to 85°C range are unaffected.

Q: Does the presence of a synchronous rectifier in ST1S09IPUR affect circuit design?

A: The integrated synchronous rectifier in the ST1S09IPUR is an internal design feature that improves efficiency. No external circuit modifications are required. The device functions as a drop-in replacement from a circuit design perspective, though efficiency characteristics may differ.

Q: What is the significance of RoHS compliance differences?

A: The original LM2832XSD is RoHS non-compliant. Both substitute parts (LM2832XSD/NOPB and ST1S09IPUR) are ROHS3 compliant. For applications subject to RoHS regulations or customer requirements, the substitute parts satisfy compliance requirements.

Q: How does the moisture sensitivity level (MSL) affect component handling?

A: The LM2832XSD and LM2832XSD/NOPB have MSL 3 rating (168 hours), requiring controlled storage and handling. The ST1S09IPUR has MSL 1 rating (unlimited), allowing indefinite storage without moisture control measures. MSL 1 components offer simplified supply chain and storage management.