LP2992AIM5X-3.3 Equivalent & Substitute Parts

Part Overview

The LP2992AIM5X-3.3 is a linear voltage regulator IC from Texas Instruments designed to deliver a fixed 3.3V output at 250mA in a surface-mount SOT-23-5 package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The device provides positive fixed output regulation with integrated protection features including over-current, over-temperature, and short-circuit protection, suitable for low-power applications requiring stable 3.3V rails.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	3.3V
Output Current	250mA
Input Voltage (Max)	16V
Dropout Voltage (Max)	0.85V @ 250mA
Quiescent Current	95 µA
Package Type	SOT-23-5 (SC-74A)
Operating Temperature Range	-40°C to 125°C
Protection Features	Over Current, Over Temperature, Short Circuit
Control Features	Enable
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the LP2992AIM5X-3.3 is determined by the following critical parameters:

Primary Substitution Criteria:

Fixed output voltage of 3.3V
SOT-23-5 package compatibility
Output current capability of 250mA or greater
Maximum input voltage of 16V or greater
Operating temperature range of -40°C to 125°C
Enable control feature
Surface-mount technology

Substitution Categories:

Parametric Equivalents (Texas Instruments LP2992 series): Parts LP2992AIM5-3.3/NOPB, LP2992AIM5X-3.3/NOPB, LP2992IM5-3.3/NOPB, and LP2992IM5X-3.3/NOPB maintain identical electrical specifications and differ only in packaging format (Cut Tape vs. Tape & Reel). These parts are direct replacements with active product status and RoHS3 compliance.

Manufacturer Recommended Alternatives (Higher Current Capability): AP2210K series from Diodes Incorporated and SPX3819M5-L-3-3/TR from MaxLinear provide increased output current (300mA and 500mA respectively) while maintaining 3.3V fixed output and SOT-23-5 packaging. These are suitable for applications requiring higher current delivery.

Manufacturer Recommended Alternatives (Lower Current Capability): LD2985BM33R from STMicroelectronics and SPX5205M5-L-3-3/TR from MaxLinear provide reduced output current (150mA) with improved dropout voltage performance and lower quiescent current, suitable for power-sensitive applications.

Parameter Comparison

Part Number	Manufacturer	Output Current	Input Voltage (Max)	Dropout Voltage (Max)	Quiescent Current	Product Status	RoHS Status	Packaging
LP2992AIM5X-3.3	Texas Instruments	250mA	16V	0.85V @ 250mA	95 µA	Obsolete	Non-compliant	SOT-23-5
LP2992AIM5-3.3/NOPB	Texas Instruments	250mA	16V	0.85V @ 250mA	95 µA	Active	RoHS3 Compliant	SOT-23-5
LP2992AIM5X-3.3/NOPB	Texas Instruments	250mA	16V	0.85V @ 250mA	95 µA	Active	RoHS3 Compliant	SOT-23-5
LP2992IM5-3.3/NOPB	Texas Instruments	250mA	16V	0.85V @ 250mA	95 µA	Active	RoHS3 Compliant	SOT-23-5
LP2992IM5X-3.3/NOPB	Texas Instruments	250mA	16V	0.85V @ 250mA	95 µA	Active	RoHS3 Compliant	SOT-23-5
AP2210K-3.3TRE1	Diodes Incorporated	300mA	13.2V	0.5V @ 300mA	180 µA	Active	RoHS3 Compliant	SOT-23-5
AP2210K-3.3TRG1	Diodes Incorporated	300mA	13.2V	0.5V @ 300mA	180 µA	Active	RoHS3 Compliant	SOT-23-5
LD2985BM33R	STMicroelectronics	150mA	16V	0.575V @ 150mA	150 µA	Active	RoHS3 Compliant	SOT-23-5
SPX3819M5-L-3-3/TR	MaxLinear, Inc.	500mA	16V	0.7V @ 500mA	8 µA	Active	RoHS3 Compliant	SOT-23-5
SPX5205M5-L-3-3/TR	MaxLinear, Inc.	150mA	16V	0.35V @ 150mA	5 µA	Active	RoHS Compliant	SOT-23-5

Engineering Selection Recommendations

Direct Replacement (Parametric Equivalents): LP2992AIM5-3.3/NOPB, LP2992AIM5X-3.3/NOPB, LP2992IM5-3.3/NOPB, and LP2992IM5X-3.3/NOPB are the primary substitutes for the obsolete LP2992AIM5X-3.3. All four parts maintain identical electrical specifications and are available in active product status with RoHS3 compliance. Selection between these variants depends on packaging format requirements: Cut Tape (CT) & Digi-Reel for LP2992AIM5-3.3/NOPB and LP2992IM5-3.3/NOPB, or Tape & Reel (TR) for LP2992AIM5X-3.3/NOPB and LP2992IM5X-3.3/NOPB.

Higher Current Applications: AP2210K-3.3TRE1 and AP2210K-3.3TRG1 from Diodes Incorporated provide 300mA output current with improved dropout voltage (0.5V @ 300mA). These parts are suitable for applications requiring current delivery above 250mA. Note that maximum input voltage is reduced to 13.2V compared to the original 16V specification.

Lower Current, Improved Efficiency: SPX3819M5-L-3-3/TR from MaxLinear delivers 500mA output current with significantly lower quiescent current (8 µA) and maintains 16V maximum input voltage. This part is optimal for applications where higher current capacity and lower standby power consumption are beneficial.

SPX5205M5-L-3-3/TR from MaxLinear provides 150mA output current with the lowest dropout voltage (0.35V @ 150mA) and quiescent current (5 µA). This part is suitable for power-constrained applications with lower current requirements. Operating temperature range is limited to -40°C to 85°C.

LD2985BM33R from STMicroelectronics offers 150mA output current with 16V maximum input voltage and is suitable for applications requiring lower current with full temperature range support.

All recommended substitutes maintain SOT-23-5 packaging, 3.3V fixed output, enable control feature, and active product status with RoHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can I use LP2992AIM5-3.3/NOPB as a direct replacement for LP2992AIM5X-3.3?

A: Yes. Both parts have identical electrical specifications (250mA output, 3.3V fixed, 0.85V dropout @ 250mA, 95 µA quiescent current) and SOT-23-5 packaging. The difference is packaging format: LP2992AIM5-3.3/NOPB is supplied in Cut Tape & Digi-Reel format, while LP2992AIM5X-3.3/NOPB is supplied in Tape & Reel format. Selection depends on your procurement and assembly requirements.

Q: What is the difference between the LP2992 variants (AIM5, IM5, AIM5X, IM5X)?

A: All four variants maintain identical electrical specifications. The designations indicate different temperature grades and packaging formats within the LP2992 series. All active variants (LP2992AIM5-3.3/NOPB, LP2992AIM5X-3.3/NOPB, LP2992IM5-3.3/NOPB, LP2992IM5X-3.3/NOPB) are RoHS3 compliant and suitable as direct replacements for the obsolete LP2992AIM5X-3.3.

Q: Can I use AP2210K-3.3TRE1 if my application requires exactly 250mA?

A: AP2210K-3.3TRE1 provides 300mA output current, which exceeds the 250mA requirement. The part is electrically compatible with 3.3V fixed output and SOT-23-5 packaging. However, the maximum input voltage is 13.2V compared to the original 16V specification. Verify that your input voltage does not exceed 13.2V before selecting this part.

Q: Which substitute offers the best dropout voltage performance?

A: SPX5205M5-L-3-3/TR from MaxLinear provides the lowest dropout voltage at 0.35V @ 150mA. This part is optimal for applications where minimizing voltage drop across the regulator is critical. Note that this part is rated for 150mA output current and -40°C to 85°C operating temperature range.

Q: Are all substitute parts RoHS compliant?

A: All active substitute parts listed are RoHS3 compliant except SPX5205M5-L-3-3/TR, which is RoHS compliant. The original LP2992AIM5X-3.3 is RoHS non-compliant. If RoHS compliance is required for your application, select from the RoHS3 compliant alternatives.

Q: What is the difference between Cut Tape and Tape & Reel packaging?

A: Cut Tape (CT) & Digi-Reel packaging is supplied on continuous tape that can be cut to length for manual assembly or smaller production runs. Tape & Reel (TR) packaging is supplied on full reels for automated pick-and-place assembly in high-volume production. Both formats contain the same component in SOT-23-5 package; selection depends on your assembly process and volume requirements.

Q: Can I use SPX3819M5-L-3-3/TR for applications requiring exactly 250mA?

A: Yes. SPX3819M5-L-3-3/TR provides 500mA output current, which exceeds the 250mA requirement. The part maintains 3.3V fixed output, SOT-23-5 packaging, and 16V maximum input voltage. The significantly lower quiescent current (8 µA vs. 95 µA) makes this part advantageous for battery-powered or power-sensitive applications.

Q: What should I consider when selecting between multiple substitute options?

A: Selection criteria include: (1) output current requirement—choose a part rated for your application's current demand; (2) input voltage range—verify maximum input voltage compatibility; (3) dropout voltage—lower dropout reduces heat dissipation and improves efficiency; (4) quiescent current—lower values reduce standby power consumption; (5) operating temperature range—ensure full -40°C to 125°C coverage if required; (6) packaging format—select based on assembly process (Cut Tape for manual/small volume, Tape & Reel for automated/high volume); (7) compliance requirements—verify RoHS status if mandated.

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