LP2992IM5X-2.5 Equivalent & Substitute Parts

Part Overview

The LP2992IM5X-2.5 is a linear voltage regulator IC from Texas Instruments, delivering a fixed 2.5V output at 250mA in a SOT-23-5 surface mount package. This part is classified as Obsolete, making identification of equivalent and substitute components essential for ongoing design support and production continuity. 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 2.5V regulation.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Output Voltage (Fixed)	2.5V
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
Control Features	Enable

Substitute Part Grouping Explanation

Substitution eligibility for the LP2992IM5X-2.5 is determined by the following critical parameters:

Output Voltage: Must be fixed at 2.5V
Package Type: Must be SOT-23-5 (SC-74A, SOT-753)
Input Voltage Rating: Maximum 16V or higher
Output Current Capability: Minimum 250mA (equal or greater)
Dropout Voltage: Maximum 0.85V @ rated current or lower
Operating Temperature Range: -40°C to 125°C minimum
Protection Features: Over-current and over-temperature protection required
Mounting Type: Surface mount only

Parametric equivalents maintain identical electrical specifications across all critical parameters. Manufacturer-recommended alternatives may vary in specific characteristics (such as quiescent current or maximum supply current) while remaining functionally compatible within the application envelope.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Dropout Voltage (Max)	Quiescent Current	Product Status	RoHS Status
LP2992IM5X-2.5	Texas Instruments	2.5V	250mA	0.85V @ 250mA	95 µA	Obsolete	Non-compliant
LP2992AIM5-2.5	Texas Instruments	2.5V	250mA	0.85V @ 250mA	95 µA	Last Time Buy	ROHS3 Compliant
LP2992AIM5-2.5/NOPB	Texas Instruments	2.5V	250mA	0.85V @ 250mA	95 µA	Active	ROHS3 Compliant
LP2992IM5-2.5	Texas Instruments	2.5V	250mA	0.85V @ 250mA	95 µA	Last Time Buy	ROHS3 Compliant
LP2992IM5-2.5/NOPB	Texas Instruments	2.5V	250mA	0.85V @ 250mA	95 µA	Last Time Buy	ROHS3 Compliant
LP2992IM5X-2.5/NOPB	Texas Instruments	2.5V	250mA	0.85V @ 250mA	95 µA	Last Time Buy	ROHS3 Compliant
LD2985BM25R	STMicroelectronics	2.5V	150mA	0.575V @ 150mA	150 µA	Active	ROHS3 Compliant
SPX3819M5-L-2-5/TR	MaxLinear, Inc.	2.5V	500mA	0.7V @ 500mA	8 µA	Active	RoHS Compliant

Engineering Selection Recommendations

Direct Parametric Equivalents (Texas Instruments LP2992 Series)

LP2992AIM5-2.5/NOPB is the primary recommended substitute. This part maintains identical electrical specifications to the LP2992IM5X-2.5 while offering Active product status and ROHS3 compliance. The /NOPB designation indicates lead-free, halogen-free manufacturing, meeting modern environmental standards.

LP2992IM5-2.5/NOPB and LP2992IM5X-2.5/NOPB are functionally equivalent alternatives with Last Time Buy status. These parts provide identical performance characteristics and are suitable for applications where long-term availability is not critical.

Manufacturer-Recommended Alternatives

LD2985BM25R (STMicroelectronics) is an Active product with identical output voltage and package. This part delivers lower output current (150mA versus 250mA) and exhibits superior dropout voltage performance (0.575V @ 150mA). Selection is appropriate only for applications requiring maximum 150mA output current.

SPX3819M5-L-2-5/TR (MaxLinear, Inc.) is an Active product offering higher output current capability (500mA) with superior quiescent current performance (8 µA versus 95 µA). This part is suitable for applications requiring higher current delivery or lower standby power consumption. Dropout voltage is 0.7V @ 500mA.

Compliance Considerations

All recommended substitutes except the original LP2992IM5X-2.5 are ROHS3 compliant, meeting current environmental regulations. For new designs or production requiring regulatory compliance, LP2992AIM5-2.5/NOPB is the optimal selection.

Frequently Asked Questions (FAQ)

Q: Can LP2992AIM5-2.5/NOPB directly replace LP2992IM5X-2.5 in existing designs?

A: Yes. Both parts deliver identical electrical specifications: 2.5V fixed output, 250mA maximum output current, 0.85V maximum dropout voltage at 250mA, and identical SOT-23-5 packaging. No circuit modifications are required.

Q: What is the difference between LP2992IM5-2.5 and LP2992AIM5-2.5?

A: Both parts are electrically identical. The "A" designation in LP2992AIM5-2.5 indicates a different manufacturing grade or qualification level. Electrical performance, package, and pin configuration are identical.

Q: Why would I select LD2985BM25R over LP2992AIM5-2.5/NOPB?

A: LD2985BM25R is appropriate only if your application requires maximum 150mA output current. This part offers superior dropout voltage (0.575V @ 150mA) and is currently in Active production status. For applications requiring 250mA output, this part is unsuitable.

Q: Is SPX3819M5-L-2-5/TR a suitable replacement for 250mA applications?

A: Yes, SPX3819M5-L-2-5/TR is functionally compatible. It delivers 500mA output current capability, exceeding the 250mA requirement. The lower quiescent current (8 µA) provides power efficiency benefits. Dropout voltage is 0.7V @ 500mA, slightly lower than the original 0.85V specification.

Q: What does the /NOPB suffix indicate?

A: /NOPB designates lead-free, halogen-free (RoHS compliant) manufacturing. This suffix is standard for current production parts and indicates compliance with environmental regulations.

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

A: Yes. All listed substitutes use SOT-23-5 (SC-74A, SOT-753) surface mount packaging with identical pin configuration and footprint compatibility.

Q: Which substitute has the best long-term availability?

A: LP2992AIM5-2.5/NOPB and SPX3819M5-L-2-5/TR both carry Active product status, indicating ongoing production and long-term availability. Parts with Last Time Buy status have limited production windows.

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