LM2830ZSD Equivalent & Substitute Parts

Part Overview

The LM2830ZSD is a buck switching regulator IC from Texas Instruments designed for positive adjustable output applications. It delivers 1A output current with an adjustable voltage range from 0.6V to 4.5V, operating from a 3V to 5.5V input supply. The device is classified as obsolete, which necessitates identification of equivalent and substitute components for new designs or production continuity.

Substiute Parts

LM2830ZSD

Texas InstrumentsIn Stock: 1192LM2830ZSD Datasheet

Current PartRFQ

LM2830ZSD/NOPB

Texas InstrumentsIn Stock: 4175LM2830ZSD/NOPB Datasheet

DirectRFQ

ST1S09IPUR

STMicroelectronicsIn Stock: 6799ST1S09IPUR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LM2830ZSD is determined by the following critical parameters: buck topology, positive adjustable output configuration, package compatibility (6-WDFN Exposed Pad), and electrical performance within specified ranges. The substitute parts are grouped into two categories:

Direct Equivalent (Same Manufacturer): LM2830ZSD/NOPB maintains identical electrical specifications and package form factor, differing only in packaging format (Tape & Reel) and product status (Active vs. Obsolete).

Functional Substitute (Alternative Manufacturer): ST1S09IPUR provides buck regulation with positive adjustable output in a compatible 6-VDFN package. While output current capability is higher (2A vs. 1A) and certain electrical parameters differ, the core functionality and package footprint remain compatible for applications within the LM2830ZSD's operational envelope.

Parameter Comparison

Engineering Selection Recommendations

LM2830ZSD/NOPB is the primary substitute for the obsolete LM2830ZSD. It provides identical electrical performance and package compatibility while offering active product status and ROHS3 compliance. The only distinction is packaging format (Tape & Reel vs. bulk), making this the direct replacement for production continuity.

ST1S09IPUR serves as a functional alternative for applications requiring enhanced performance margins. It offers higher output current capability (2A), wider input voltage range (2.7V to 6V), integrated synchronous rectification, and superior moisture sensitivity rating (MSL 1). However, the lower operating temperature maximum (-30°C vs. -40°C) and different package designation (6-VDFN vs. 6-WDFN) require design verification for thermal and layout compatibility.

Frequently Asked Questions (FAQ)

Q: Can LM2830ZSD/NOPB be used as a direct replacement for LM2830ZSD?

A: Yes. LM2830ZSD/NOPB is electrically and mechanically identical to LM2830ZSD. The difference is packaging format (Tape & Reel) and active product status. No design changes are required.

Q: Is ST1S09IPUR compatible with LM2830ZSD applications?

A: ST1S09IPUR is functionally compatible for buck regulation applications within the LM2830ZSD's voltage and current specifications. However, design verification is necessary due to differences in switching frequency (1.5MHz vs. 3MHz), output voltage minimum (0.8V vs. 0.6V), and operating temperature range (-30°C to 85°C vs. -40°C to 125°C).

Q: What are the package differences between LM2830ZSD and ST1S09IPUR?

A: Both use 6-pin DFN packages with exposed pads in 3x3mm form factor. LM2830ZSD uses 6-WDFN; ST1S09IPUR uses 6-VDFN. Physical footprints are compatible, but pin assignments and thermal characteristics may differ. PCB layout review is required.

Q: Why is RoHS compliance important for this substitution?

A: The original LM2830ZSD is RoHS non-compliant. Both substitute parts (LM2830ZSD/NOPB and ST1S09IPUR) are ROHS3 compliant, meeting current environmental and regulatory requirements for new designs and production.

Q: What is the significance of the synchronous rectifier in ST1S09IPUR?

A: ST1S09IPUR includes an integrated synchronous rectifier, which improves efficiency by reducing conduction losses compared to the LM2830ZSD's non-synchronous design. This results in lower heat generation and potentially improved performance in power-sensitive applications.

Q: How does moisture sensitivity affect component selection?

A: LM2830ZSD and LM2830ZSD/NOPB have MSL 3 (168-hour limit), requiring controlled storage and handling. ST1S09IPUR has MSL 1 (unlimited), offering greater flexibility in storage and manufacturing environments without moisture bake-out requirements.