LP2992IM5X-1.5/NOPB Equivalent & Substitute Parts

Part Overview

The LP2992IM5X-1.5/NOPB is a linear voltage regulator IC from Texas Instruments designed for positive fixed 1.5V output at 250mA in a SOT-23-5 surface mount package. This device operates across -40°C to 125°C and includes integrated protection features for over-current, over-temperature, and short-circuit conditions. The part is currently in Last Time Buy status, making identification of equivalent and substitute components essential for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Output Configuration	Positive
Output Type	Fixed
Output Voltage	1.5V
Output Current	250mA
Input Voltage (Max)	16V
Dropout Voltage (Max)	0.85V @ 250mA
Quiescent Current	95 µA
Package	SOT-23-5 (SC-74A)
Operating Temperature	-40°C to 125°C
Protection Features	Over Current, Over Temperature, Short Circuit
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the LP2992IM5X-1.5/NOPB are categorized based on electrical and mechanical compatibility within the allowed parameters for this linear regulator category:

Parametric Equivalents share identical electrical specifications: fixed 1.5V output, 250mA output current, 16V maximum input, 0.85V dropout voltage, SOT-23-5 package, and equivalent protection features. These parts are direct functional replacements with no design modifications required.

Manufacturer Recommended Substitutes may differ in output current capability, output type (adjustable vs. fixed), package format, or quiescent current specifications, but remain compatible within the application's electrical constraints and thermal requirements.

The key parameters determining substitution eligibility are: output voltage (1.5V fixed), output current rating (minimum 250mA), maximum input voltage (16V), package type (SOT-23-5), and operating temperature range (-40°C to 125°C).

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Input Voltage (Max)	Dropout Voltage (Max)	Quiescent Current	Package	Product Status
LP2992IM5X-1.5/NOPB	Texas Instruments	1.5V Fixed	250mA	16V	0.85V @ 250mA	95 µA	SOT-23-5	Last Time Buy
LP2992AIM5-1.5/NOPB	National Semiconductor	1.5V Fixed	250mA	16V	0.85V @ 250mA	95 µA	SOT-23-5	Active
LP2992AIM5X-1.5/NOPB	National Semiconductor	1.5V Fixed	250mA	16V	0.85V @ 250mA	95 µA	SOT-23-5	Active
LP2992IM5-1.5/NOPB	Texas Instruments	1.5V Fixed	250mA	16V	0.85V @ 250mA	95 µA	SOT-23-5	Obsolete
SPX3819M5-L-1-5/TR	MaxLinear, Inc.	1.5V Fixed	500mA	16V	Not Specified	8 µA	SOT-23-5	Active
TPS7A2501DRVR	Texas Instruments	1.24V to 17.66V Adjustable	300mA	18V	0.34V @ 300mA	4.5 µA	6-WSON (2x2)	Active

Engineering Selection Recommendations

For Direct Replacement (No Design Changes): LP2992AIM5-1.5/NOPB and LP2992AIM5X-1.5/NOPB are parametric equivalents with Active product status and identical electrical specifications. Both are ROHS3 compliant and suitable for immediate substitution in existing designs.

For Enhanced Performance: SPX3819M5-L-1-5/TR provides 500mA output current (double the original specification) while maintaining 1.5V fixed output and SOT-23-5 package compatibility. This part is Active and RoHS compliant, offering increased current headroom for applications requiring higher load capacity.

For Advanced Features: TPS7A2501DRVR offers adjustable output voltage (1.24V to 17.66V), lower quiescent current (4.5 µA vs. 95 µA), and Power Good output functionality. However, this part requires a different package (6-WSON vs. SOT-23-5) and design modifications for output voltage configuration.

Avoid: LP2992IM5-1.5/NOPB is marked Obsolete and should not be selected for new designs despite parametric equivalence.

Frequently Asked Questions (FAQ)

Q: Can LP2992AIM5-1.5/NOPB replace LP2992IM5X-1.5/NOPB without PCB modifications? A: Yes. Both parts share identical electrical specifications (1.5V fixed output, 250mA, 16V input maximum, 0.85V dropout) and SOT-23-5 package pinout. No design changes are required.

Q: What is the advantage of using SPX3819M5-L-1-5/TR? A: SPX3819M5-L-1-5/TR maintains the same 1.5V output and SOT-23-5 package but provides 500mA output current versus 250mA. This allows designs to operate with higher load currents or reduced thermal stress at the same current level. The part is Active and RoHS compliant.

Q: Why is TPS7A2501DRVR listed as a substitute if it requires a different package? A: TPS7A2501DRVR is a manufacturer-recommended alternative for applications where adjustable output voltage, lower quiescent current, and Power Good monitoring are beneficial. The 6-WSON package requires PCB layout changes but offers superior performance characteristics. This substitution is appropriate only when design modifications are feasible.

Q: Are all substitute parts ROHS3 compliant? A: LP2992AIM5-1.5/NOPB, LP2992AIM5X-1.5/NOPB, and LP2992IM5-1.5/NOPB are ROHS3 compliant. SPX3819M5-L-1-5/TR is RoHS compliant. TPS7A2501DRVR compliance status is not specified in the provided data.

Q: What is the difference between LP2992AIM5-1.5/NOPB and LP2992AIM5X-1.5/NOPB? A: Both parts are parametrically identical with the same electrical specifications and SOT-23-5 package. The difference lies in packaging format: LP2992AIM5-1.5/NOPB is supplied in Bulk, while LP2992AIM5X-1.5/NOPB is also supplied in Bulk. Both are Active status parts suitable for production use.

Q: Can I use SPX3819M5-L-1-5/TR in a design originally specified for 250mA output? A: Yes. SPX3819M5-L-1-5/TR is backward compatible for applications requiring 250mA or less, as it provides 500mA capability. The higher current rating does not negatively impact designs with lower current requirements. Verify thermal performance remains acceptable in your specific application.

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