LM2832YSD Buck Switching Regulator IC Equivalent & Substitute Parts

Part Overview

The LM2832YSD 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 adjustable output voltage ranging from 0.6V to 4.5V and an input voltage range of 3V to 5.5V. The LM2832YSD is classified as obsolete, making identification of active equivalent and substitute parts essential for new designs and production continuity.

Substiute Parts

LM2832YSD

Texas InstrumentsIn Stock: 2061LM2832YSD Datasheet

Current PartRFQ

LM2832YSD/NOPB

Texas InstrumentsIn Stock: 1756LM2832YSD/NOPB Datasheet

DirectRFQ

ST1S09IPUR

STMicroelectronicsIn Stock: 6799ST1S09IPUR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LM2832YSD are identified based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

• Topology & Function: Step-down (buck) switching regulator topology
• Output Configuration: Positive adjustable output
• Output Current Rating: 2A minimum
• Package Compatibility: 6-pin surface mount with exposed pad
• Input Voltage Range: Minimum 3V to 5.5V maximum
• Output Voltage Adjustability: Minimum 0.6V to 4.5V maximum

Two substitute parts meet these criteria: LM2832YSD/NOPB (direct Texas Instruments equivalent with improved compliance status) and ST1S09IPUR (manufacturer-recommended alternative from STMicroelectronics with enhanced specifications).

Parameter Comparison

Engineering Selection Recommendations

LM2832YSD/NOPB is the direct equivalent from Texas Instruments. This part maintains identical electrical specifications and package footprint while offering active product status and ROHS3 compliance. The LM2832YSD/NOPB is supplied in Tape & Reel packaging and is recommended for designs requiring exact form-fit-function replacement with improved regulatory compliance.

ST1S09IPUR is the manufacturer-recommended alternative from STMicroelectronics. This part provides broader input voltage range (2.7V to 6V), extended output voltage range (0.8V to 5.22V), and includes integrated synchronous rectification for improved efficiency. The ST1S09IPUR operates at higher switching frequency (1.5MHz) and features superior moisture sensitivity rating (MSL 1). However, the operating temperature range is narrower (-30°C to 85°C) and the package variant (6-VDFN) requires PCB layout verification for pin compatibility. Both substitute parts maintain 2A output current and positive adjustable output configuration.

Frequently Asked Questions (FAQ)

Q: Can LM2832YSD/NOPB be used as a direct replacement for LM2832YSD?

A: Yes. LM2832YSD/NOPB is the active production equivalent with identical electrical specifications, output voltage range (0.6V to 4.5V), input voltage range (3V to 5.5V), 2A output current, and 6-WDFN package. The primary difference is product status (active vs. obsolete) and RoHS compliance (ROHS3 vs. non-compliant). No circuit modifications are required.

Q: What are the key differences between LM2832YSD and ST1S09IPUR?

A: Both devices function as 2A buck regulators with positive adjustable outputs and 6-pin exposed pad packages. ST1S09IPUR offers wider input voltage range (2.7V to 6V vs. 3V to 5.5V), higher switching frequency (1.5MHz vs. 550kHz), integrated synchronous rectification, and superior moisture sensitivity rating (MSL 1 vs. MSL 3). The ST1S09IPUR has narrower operating temperature range (-30°C to 85°C vs. -40°C to 125°C) and uses 6-VDFN package variant instead of 6-WDFN.

Q: Are package footprints identical between all three parts?

A: LM2832YSD and LM2832YSD/NOPB use 6-WDFN Exposed Pad (3x3mm). ST1S09IPUR uses 6-VDFN Exposed Pad (3x3mm). While both are 6-pin exposed pad packages with identical 3x3mm dimensions, pin assignments and pad layouts may differ. PCB layout verification is required before substituting ST1S09IPUR.

Q: Which substitute part is recommended for new designs?

A: Selection depends on application requirements. For exact replacement with improved compliance, use LM2832YSD/NOPB. For applications requiring extended input voltage range, higher efficiency, or superior moisture resistance, use ST1S09IPUR with layout verification.

Q: What is the impact of different switching frequencies?

A: LM2832YSD and LM2832YSD/NOPB operate at 550kHz, while ST1S09IPUR operates at 1.5MHz. Higher switching frequency reduces output filter component size but may increase EMI considerations. Circuit design and PCB layout must account for the selected switching frequency.

Q: Are there temperature range limitations when substituting ST1S09IPUR?

A: ST1S09IPUR operating temperature range is -30°C to 85°C (TJ), compared to -40°C to 125°C for LM2832YSD variants. Applications requiring operation below -30°C or above 85°C must use LM2832YSD or LM2832YSD/NOPB.