LP3470IM5-4.8/NOPB Equivalent & Substitute Parts

Part Overview

The LP3470IM5-4.8/NOPB is a single-channel power supply supervisor IC manufactured by Texas Instruments, designed for power-on reset and simple reset applications. This device features an open drain output, active low reset, and a fixed 4.8V threshold voltage. The part is classified as Not For New Designs, indicating it has been superseded in Texas Instruments' product portfolio. Finding equivalent and substitute parts is necessary for ongoing maintenance, legacy system support, and design continuity where the original specification remains applicable.

Substiute Parts

LP3470IM5-4.8/NOPB

Texas InstrumentsIn Stock: 734LP3470IM5-4.8/NOPB Datasheet

Current PartRFQ

TPS389001DSER

Texas InstrumentsIn Stock: 131480TPS389001DSER Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LP3470IM5-4.8/NOPB is determined by the following critical parameters:

• Functional Type: Single-channel power supply supervisor with simple reset/power-on reset capability
• Output Configuration: Open drain or open collector output with active low reset logic
• Voltage Monitoring: Single voltage threshold monitoring
• Electrical Compatibility: Threshold voltage, reset timeout, and output characteristics must match or be compatible with the application circuit
• Environmental Specifications: Operating temperature range and compliance certifications (RoHS3, REACH)
• Package Compatibility: Surface mount packaging suitable for the target PCB layout

The TPS389001DSER qualifies as a substitute based on matching functional category, output type, reset logic, and compliance standards. However, the TPS389001DSER features an adjustable/selectable voltage threshold and an extended operating temperature range (-40°C to 125°C), providing additional design flexibility while maintaining core supervisor functionality.

Parameter Comparison

Engineering Selection Recommendations

The TPS389001DSER is the manufacturer-recommended substitute for the LP3470IM5-4.8/NOPB. Both devices are Texas Instruments products with identical RoHS3 and REACH compliance status, ensuring regulatory alignment. The TPS389001DSER carries Active product status, confirming ongoing manufacturer support and availability.

Key considerations for selection:

• Voltage Threshold: The LP3470IM5-4.8/NOPB provides a fixed 4.8V threshold. The TPS389001DSER offers adjustable/selectable threshold capability, allowing configuration to match the original 4.8V specification or alternative thresholds as required by the application.
• Temperature Range: The TPS389001DSER extends the upper operating temperature limit to 125°C, compared to 85°C for the LP3470IM5-4.8/NOPB. This provides enhanced thermal margin for high-temperature environments.
• Package Transition: The TPS389001DSER uses a 6-WSON package versus the SOT-23-5 package of the original part. PCB layout modification is required to accommodate the different footprint.
• Reset Timeout: The LP3470IM5-4.8/NOPB specifies a 1ms minimum reset timeout. The TPS389001DSER does not provide this parameter in the available data; circuit validation is necessary to confirm timing compatibility.

Frequently Asked Questions (FAQ)

Q: Can the TPS389001DSER directly replace the LP3470IM5-4.8/NOPB without circuit modification?

A: Functional substitution is possible if the adjustable threshold of the TPS389001DSER is configured to 4.8V and the reset timeout specification of the TPS389001DSER meets application requirements. However, the package change from SOT-23-5 to 6-WSON requires PCB layout modification.

Q: What is the primary difference between these two supervisor ICs?

A: The LP3470IM5-4.8/NOPB features a fixed 4.8V threshold, while the TPS389001DSER provides an adjustable/selectable threshold. Both devices perform single-channel power supply supervision with open drain output and active low reset logic.

Q: Is the TPS389001DSER suitable for applications requiring the exact 1ms reset timeout of the LP3470IM5-4.8/NOPB?

A: The reset timeout specification for the TPS389001DSER is not provided in the available technical parameters. Application-specific validation is required to confirm timing compatibility before deployment.

Q: Are there compliance or regulatory differences between these parts?

A: Both the LP3470IM5-4.8/NOPB and TPS389001DSER are ROHS3 compliant and REACH unaffected, with identical MSL ratings of 1 (Unlimited). No compliance barriers exist for substitution.

Q: What packaging considerations apply when switching from LP3470IM5-4.8/NOPB to TPS389001DSER?

A: The LP3470IM5-4.8/NOPB uses SOT-23-5 packaging (SC-74A, SOT-753), while the TPS389001DSER uses 6-WSON (1.5x1.5) packaging. Different PCB footprints, land patterns, and assembly processes apply. Design files and manufacturing documentation must be updated accordingly.