LP38690SD-2.5 Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The LP38690SD-2.5 is a linear voltage regulator IC from Texas Instruments designed for positive fixed output applications. This device delivers 1A output current at a fixed 2.5V output with a maximum dropout voltage of 1.3V at full load. The main part number (LP38690SD-2.5) is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Substitute parts maintain identical electrical and mechanical specifications while offering improved availability and compliance status.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	2.5V
Output Current	1A
Input Voltage (Max)	10V
Dropout Voltage (Max)	1.3V @ 1A
Quiescent Current	55 µA
PSRR	55dB (120Hz)
Operating Temperature Range	-40°C to 125°C
Package	6-WSON (3x3)
Mounting Type	Surface Mount
Protection Features	Over Temperature

Substitute Part Grouping Explanation

Substitute parts for the LP38690SD-2.5 are qualified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Critical Parameters for Substitution:

Output voltage: 2.5V fixed
Output current capability: 1A minimum
Input voltage rating: 10V maximum
Dropout voltage: 1.3V @ 1A maximum
Package type: 6-WSON (3x3)
Operating temperature range: -40°C to 125°C
Quiescent current: 55 µA
PSRR: 55dB (120Hz)

Parts are grouped into two categories: direct manufacturer equivalents (same manufacturer, different packaging) and parametric equivalents (different manufacturer, identical electrical specifications).

Parameter Comparison

Parameter	LP38690SD-2.5	LP38690SD-2.5/NOPB	LP38692SD-2.5/NOPB
Manufacturer	Texas Instruments	Texas Instruments	National Semiconductor
Product Status	Obsolete	Active	Active
Output Voltage	2.5V	2.5V	2.5V
Output Current	1A	1A	1A
Input Voltage (Max)	10V	10V	10V
Dropout Voltage (Max)	1.3V @ 1A	1.3V @ 1A	1.3V @ 1A
Quiescent Current	55 µA	55 µA	55 µA
PSRR	55dB (120Hz)	55dB (120Hz)	55dB (120Hz)
Operating Temperature	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C
Package	6-WSON (3x3)	6-WSON (3x3)	6-WSON (3x3)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Packaging Option	Tube	Tape & Reel (TR)	Bulk
RoHS Status	Non-compliant	ROHS3 Compliant	Not specified
Protection Features	Over Temperature	Over Temperature	Over Temperature

Engineering Selection Recommendations

LP38690SD-2.5/NOPB (Direct Manufacturer Equivalent)

This part is the primary substitute for the obsolete LP38690SD-2.5. It is manufactured by Texas Instruments and maintains identical electrical specifications and package configuration. The LP38690SD-2.5/NOPB is classified as active product status, ensuring long-term availability and supply chain continuity. This part achieves ROHS3 compliance, meeting current environmental and regulatory requirements. The primary difference is packaging format (Tape & Reel versus tube), which affects handling and assembly processes but does not impact electrical performance or board-level compatibility.

LP38692SD-2.5/NOPB (Parametric Equivalent)

This part from National Semiconductor provides parametric equivalence with identical electrical performance across all critical specifications. The LP38692SD-2.5/NOPB maintains active product status and is available in bulk packaging. This option is suitable for applications where manufacturer flexibility is acceptable and electrical performance requirements are the primary selection criterion. All electrical parameters, thermal characteristics, and package dimensions remain equivalent to the main part number.

Frequently Asked Questions (FAQ)

Q: Can LP38690SD-2.5/NOPB be used as a direct replacement for LP38690SD-2.5?

A: Yes. The LP38690SD-2.5/NOPB is electrically and mechanically identical to LP38690SD-2.5. The primary difference is packaging format (Tape & Reel versus tube) and RoHS compliance status. No circuit modifications are required for substitution.

Q: What is the difference between LP38690SD-2.5/NOPB and LP38692SD-2.5/NOPB?

A: Both parts deliver identical electrical performance and are housed in the same 6-WSON (3x3) package. The primary difference is manufacturer: LP38690SD-2.5/NOPB is from Texas Instruments, while LP38692SD-2.5/NOPB is from National Semiconductor. Both are active products with equivalent specifications.

Q: Does packaging format affect circuit performance?

A: No. Packaging format (tube, Tape & Reel, or bulk) affects handling, storage, and assembly processes but does not impact electrical performance or board-level functionality. All substitute parts maintain identical electrical characteristics regardless of packaging option.

Q: Is RoHS compliance required for my application?

A: RoHS compliance requirements depend on your application and target market. LP38690SD-2.5/NOPB is ROHS3 compliant, while the original LP38690SD-2.5 is non-compliant. If RoHS compliance is mandatory, LP38690SD-2.5/NOPB is the appropriate selection.

Q: Can I mix different substitute parts in the same production run?

A: Yes. All substitute parts maintain identical electrical specifications and package configuration. However, supply chain and traceability documentation should reflect the specific part number used in each production batch.

Q: What is the thermal performance difference between substitute parts?

A: All substitute parts maintain identical thermal characteristics, including operating temperature range (-40°C to 125°C) and thermal protection features. No thermal performance variation exists between the main part and substitute options.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message