LP3470IM5-4.38/NOPB Equivalent & Substitute Parts

Part Overview

The LP3470IM5-4.38/NOPB is a single-channel power supply supervisor IC manufactured by Texas Instruments, designed for power-on reset and voltage monitoring applications. This device features an open drain output, active low reset, and a fixed 4.38V threshold voltage. The part is classified as "Not For New Designs," indicating it has reached end-of-life status. Identifying equivalent and substitute parts is necessary to support legacy system maintenance and to enable new designs to utilize current, actively supported alternatives.

Substiute Parts

LP3470IM5-4.38/NOPB

Texas InstrumentsIn Stock: 2212LP3470IM5-4.38/NOPB Datasheet

Current PartRFQ

TPS389001DSER

Texas InstrumentsIn Stock: 131480TPS389001DSER Datasheet

MFR RecommendedRFQ

LP3470IM5-4.38

Texas InstrumentsIn Stock: 5519LP3470IM5-4.38 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LP3470IM5-4.38/NOPB are identified based on the following critical parameters:

• Functional Type: Simple Reset/Power-On Reset supervisor with single-channel voltage monitoring
• Output Configuration: Open Drain or Open Collector output
• Reset Logic: Active Low
• Voltage Monitoring Capability: Single channel
• Compliance: ROHS3 Compliant, REACH Unaffected
• Mounting: Surface Mount technology

The LP3470IM5-4.38 (parametric equivalent) maintains identical electrical specifications and package format, differing only in product status (Obsolete vs. Not For New Designs). The TPS389001DSER represents a functional substitute with adjustable voltage threshold capability, expanded operating temperature range, and active product status, though it requires a different package footprint (6-WSON vs. SOT-23-5).

Parameter Comparison

Engineering Selection Recommendations

For Legacy System Maintenance: The LP3470IM5-4.38 (parametric equivalent) provides direct replacement capability with identical electrical and mechanical specifications. Both parts maintain ROHS3 compliance and unlimited moisture sensitivity rating, ensuring regulatory compatibility with existing designs.

For New Designs: The TPS389001DSER is the recommended selection due to its Active product status, extended operating temperature range (-40°C to 125°C), and adjustable voltage threshold capability. This part eliminates obsolescence risk and provides design flexibility for threshold voltage configuration. The transition from SOT-23-5 to 6-WSON packaging requires PCB layout modification but offers improved thermal performance and smaller footprint.

Compliance Considerations: All three parts maintain ROHS3 compliance and REACH Unaffected status, ensuring regulatory alignment across legacy and current designs.

Frequently Asked Questions (FAQ)

Q: Can the LP3470IM5-4.38 be used as a direct replacement for the LP3470IM5-4.38/NOPB?

A: Yes. The LP3470IM5-4.38 is a parametric equivalent with identical voltage threshold (4.38V), output configuration (open drain), reset logic (active low), and package format (SOT-23-5). The primary difference is product status classification.

Q: What are the key differences between the LP3470IM5-4.38/NOPB and TPS389001DSER?

A: The TPS389001DSER offers adjustable voltage threshold selection versus the fixed 4.38V threshold of the LP3470IM5-4.38/NOPB. The TPS389001DSER also provides an extended operating temperature range (125°C maximum vs. 85°C) and Active product status. The package format differs: TPS389001DSER uses 6-WSON (1.5x1.5) versus SOT-23-5 for the LP3470IM5-4.38/NOPB.

Q: Is the TPS389001DSER suitable for applications requiring a fixed 4.38V threshold?

A: The TPS389001DSER features adjustable/selectable voltage threshold capability, allowing configuration to 4.38V through external component selection. Verification of threshold accuracy and settling time is required during design validation.

Q: What packaging considerations apply when transitioning from LP3470IM5-4.38/NOPB to TPS389001DSER?

A: The transition requires PCB layout modification due to package format change from SOT-23-5 (5-pin) to 6-WSON (1.5x1.5). Pin assignment and signal routing must be re-evaluated. The 6-WSON package provides improved thermal characteristics and reduced board area.

Q: Are all substitute parts RoHS and REACH compliant?

A: Yes. The LP3470IM5-4.38/NOPB, LP3470IM5-4.38, and TPS389001DSER are all ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements.