LP2992IM5-3.3 Equivalent & Substitute Parts

Part Overview

The LP2992IM5-3.3 is a linear voltage regulator IC from Texas Instruments, delivering a fixed 3.3V output at 250mA in a SOT-23-5 surface mount 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 configuration with integrated protection features including over-current, over-temperature, and short-circuit protection, suitable for low-power applications requiring stable 3.3V regulation.

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	SOT-23-5 (SC-74A)
Operating Temperature	-40°C ~ 125°C
Protection Features	Over Current, Over Temperature, Short Circuit

Substitute Part Grouping Explanation

Substitution for the LP2992IM5-3.3 is determined by the following critical parameters:

Output voltage fixed at 3.3V
Output current capability of 250mA or greater
Maximum input voltage of 16V or greater
SOT-23-5 package compatibility
Surface mount mounting type
Operating temperature range of -40°C to 125°C or compatible subset
Positive fixed output configuration

Substitute parts are grouped into two 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 package format. These differ only in product status (active vs. obsolete) and packaging format (cut tape vs. tape & reel).

Manufacturer Recommended Alternatives: Parts from Diodes Incorporated (AP2210K series), Rohm Semiconductor (BD00GA3WNUX-TR), STMicroelectronics (LD2985BM33R), and MaxLinear (SPX3819M5-L-3-3/TR, SPX5205M5-L-3-3/TR) provide functional equivalence with variations in output current, dropout voltage, quiescent current, and operating temperature ranges.

Parameter Comparison

Part Number	Manufacturer	Product Status	Output Current	Input Voltage (Max)	Dropout Voltage (Max)	Quiescent Current	Operating Temp	Package
LP2992IM5-3.3	Texas Instruments	Obsolete	250mA	16V	0.85V @ 250mA	95 µA	-40°C ~ 125°C	SOT-23-5
LP2992AIM5-3.3/NOPB	Texas Instruments	Active	250mA	16V	0.85V @ 250mA	95 µA	-40°C ~ 125°C	SOT-23-5
LP2992AIM5X-3.3/NOPB	Texas Instruments	Active	250mA	16V	0.85V @ 250mA	95 µA	-40°C ~ 125°C	SOT-23-5
LP2992IM5-3.3/NOPB	Texas Instruments	Active	250mA	16V	0.85V @ 250mA	95 µA	-40°C ~ 125°C	SOT-23-5
LP2992IM5X-3.3/NOPB	Texas Instruments	Active	250mA	16V	0.85V @ 250mA	95 µA	-40°C ~ 125°C	SOT-23-5
AP2210K-3.3TRE1	Diodes Incorporated	Active	300mA	13.2V	0.5V @ 300mA	180 µA	-40°C ~ 125°C	SOT-23-5
AP2210K-3.3TRG1	Diodes Incorporated	Active	300mA	13.2V	0.5V @ 300mA	180 µA	-40°C ~ 125°C	SOT-23-5
LD2985BM33R	STMicroelectronics	Active	150mA	16V	0.575V @ 150mA	150 µA	-40°C ~ 125°C	SOT-23-5
SPX3819M5-L-3-3/TR	MaxLinear, Inc.	Active	500mA	16V	0.7V @ 500mA	8 µA	-40°C ~ 125°C	SOT-23-5
SPX5205M5-L-3-3/TR	MaxLinear, Inc.	Active	150mA	16V	0.35V @ 150mA	5 µA	-40°C ~ 85°C	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 direct replacements with active product status. All maintain identical electrical performance and are ROHS3 compliant. Selection between these variants depends on packaging format requirements: cut tape (CT) or tape & reel (TR).

Higher Current Capability: AP2210K-3.3TRE1 and AP2210K-3.3TRG1 from Diodes Incorporated provide 300mA output current with improved dropout voltage (0.5V). These are suitable for applications requiring higher current delivery. Maximum input voltage is 13.2V, which is lower than the original part. Both are ROHS3 compliant and active products.

Lower Current Applications: LD2985BM33R from STMicroelectronics and SPX5205M5-L-3-3/TR from MaxLinear provide 150mA output current. LD2985BM33R maintains the full -40°C to 125°C temperature range. SPX5205M5-L-3-3/TR offers superior dropout voltage (0.35V) and lower quiescent current (5 µA) but operates only to 85°C maximum.

Higher Current with Enhanced Performance: SPX3819M5-L-3-3/TR from MaxLinear delivers 500mA output current with 0.7V dropout voltage and exceptionally low quiescent current (8 µA). This part maintains the full -40°C to 125°C operating range and 16V maximum input voltage.

All recommended substitutes are ROHS3 compliant, REACH unaffected, and classified as active products with established supply availability.

Frequently Asked Questions (FAQ)

Q: Can LP2992AIM5-3.3/NOPB be used as a direct replacement for LP2992IM5-3.3?

A: Yes. LP2992AIM5-3.3/NOPB is a parametric equivalent with identical electrical specifications, output voltage, current rating, and package format. The primary difference is product status (active vs. obsolete) and packaging format designation.

Q: What is the difference between LP2992IM5X-3.3/NOPB and LP2992IM5-3.3/NOPB?

A: Both parts are parametric equivalents with identical electrical performance. The "X" designation indicates extended temperature or processing variation. Electrical specifications, output voltage, current rating, and package remain the same.

Q: Can AP2210K-3.3TRE1 replace LP2992IM5-3.3 in all applications?

A: AP2210K-3.3TRE1 provides higher output current (300mA vs. 250mA) and lower dropout voltage (0.5V vs. 0.85V). However, maximum input voltage is 13.2V compared to 16V. Verify input voltage requirements before substitution. The part is pin-compatible in SOT-23-5 package.

Q: Why would I choose SPX5205M5-L-3-3/TR over LP2992IM5-3.3?

A: SPX5205M5-L-3-3/TR offers superior dropout voltage (0.35V) and extremely low quiescent current (5 µA), beneficial for battery-powered or low-power applications. However, output current is limited to 150mA and operating temperature maximum is 85°C. Select based on current requirements and temperature range.

Q: Is SPX3819M5-L-3-3/TR suitable for LP2992IM5-3.3 replacement?

A: SPX3819M5-L-3-3/TR is functionally compatible with higher output current capability (500mA), lower quiescent current (8 µA), and identical input voltage rating (16V). It maintains the full -40°C to 125°C operating range. Use when higher current delivery is required.

Q: Are all substitute parts available in the same packaging format?

A: All substitute parts use SOT-23-5 package (SC-74A). Packaging format (cut tape vs. tape & reel) varies by part number. Verify specific packaging designation when ordering.

Q: What compliance certifications apply to these substitute parts?

A: All listed substitute parts are ROHS3 compliant and REACH unaffected. Moisture sensitivity level is MSL 1 (unlimited) for all parts except AP2210K-3.3TRG1 (MSL 3, 168 hours).

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