LP2985AIM5-5.0 Equivalent & Substitute Parts

Part Overview

The LP2985AIM5-5.0 is a linear voltage regulator IC from Texas Instruments, delivering a fixed 5V output at 150mA in a SOT-23-5 surface mount package. This device is classified as Last Time Buy, indicating discontinued production with limited inventory availability. The part integrates over-current, over-temperature, and short-circuit protection with an enable control feature, operating across the industrial temperature range of -40°C to 125°C. Alternative equivalent parts are necessary due to inventory constraints and product lifecycle status.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	5V
Output Current	150mA
Input Voltage (Max)	16V
Dropout Voltage (Max)	0.58V @ 150mA
Quiescent Current	95 µA
PSRR	45dB (1kHz)
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 is determined by strict parametric equivalence across electrical and mechanical specifications. All substitute parts must maintain identical output voltage (5V fixed), output current capability (150mA), input voltage rating (16V maximum), dropout voltage performance (0.58V @ 150mA), quiescent current (95 µA), PSRR (45dB at 1kHz), package format (SOT-23-5), operating temperature range (-40°C to 125°C), and protection feature set (over-current, over-temperature, short-circuit). Control features (Enable) must be present. Mounting type must be surface mount.

Texas Instruments LP2985 variants meeting these criteria are classified as parametric equivalents. The STMicroelectronics LD2985BM50R is classified as manufacturer-recommended equivalent, with minor variations in quiescent current (150 µA vs. 95 µA) and maximum supply current (4 mA vs. 2.5 mA), but maintains all critical electrical performance parameters and identical package specifications.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Dropout Voltage	Quiescent Current	PSRR	Package	Product Status	RoHS Status	Inventory
LP2985AIM5-5.0	Texas Instruments	5V	150mA	0.58V @ 150mA	95 µA	45dB (1kHz)	SOT-23-5	Last Time Buy	RoHS Non-Compliant	2046 Pcs
LP2985-50DBVR	Texas Instruments	5V	150mA	0.58V @ 150mA	95 µA	45dB (1kHz)	SOT-23-5	Active	ROHS3 Compliant	32100 Pcs
LP2985-50DBVT	Texas Instruments	5V	150mA	0.58V @ 150mA	95 µA	45dB (1kHz)	SOT-23-5	Active	ROHS3 Compliant	2000 Pcs
LP2985A-50DBVR	Texas Instruments	5V	150mA	0.58V @ 150mA	95 µA	45dB (1kHz)	SOT-23-5	Active	ROHS3 Compliant	80100 Pcs
LP2985A-50DBVT	Texas Instruments	5V	150mA	0.58V @ 150mA	95 µA	45dB (1kHz)	SOT-23-5	Active	ROHS3 Compliant	9800 Pcs
LP2985AIM5-5.0/NOPB	Texas Instruments	5V	150mA	0.58V @ 150mA	95 µA	45dB (1kHz)	SOT-23-5	Active	ROHS3 Compliant	25200 Pcs
LP2985AIM5X-5.0/NOPB	Texas Instruments	5V	150mA	0.58V @ 150mA	95 µA	45dB (1kHz)	SOT-23-5	Active	ROHS3 Compliant	26400 Pcs
LP2985IM5-5.0	Texas Instruments	5V	150mA	0.58V @ 150mA	95 µA	45dB (1kHz)	SOT-23-5	Last Time Buy	ROHS3 Compliant	2305 Pcs
LP2985IM5-5.0/NOPB	Texas Instruments	5V	150mA	0.58V @ 150mA	95 µA	45dB (1kHz)	SOT-23-5	Active	ROHS3 Compliant	23400 Pcs
LP2985IM5X-5.0/NOPB	Texas Instruments	5V	150mA	0.58V @ 150mA	95 µA	45dB (1kHz)	SOT-23-5	Active	ROHS3 Compliant	26400 Pcs
LD2985BM50R	STMicroelectronics	5V	150mA	0.575V @ 150mA	150 µA	45dB (1kHz)	SOT-23-5	Active	ROHS3 Compliant	20200 Pcs

Engineering Selection Recommendations

For new designs and long-term production requirements, LP2985A-50DBVR is the primary selection, offering Active product status, ROHS3 compliance, and the highest inventory level (80100 pcs). This variant eliminates lifecycle risk associated with Last Time Buy designations.

LP2985AIM5-5.0/NOPB and LP2985AIM5X-5.0/NOPB provide direct parametric equivalence with Active status and substantial inventory (25200 and 26400 pcs respectively), suitable for immediate procurement needs.

For applications where REACH compliance is non-critical, LP2985IM5-5.0/NOPB maintains full electrical equivalence with 23400 pcs available inventory and Active status.

The STMicroelectronics LD2985BM50R serves as a cross-manufacturer alternative with identical package and output specifications. Minor variations in quiescent current (150 µA vs. 95 µA) and maximum supply current (4 mA vs. 2.5 mA) are within acceptable tolerance for most applications. This option provides supply chain diversification with 20200 pcs inventory and ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can LP2985-50DBVR directly replace LP2985AIM5-5.0 in existing designs?

A: Yes. Both parts maintain identical electrical specifications: 5V fixed output, 150mA current capability, 0.58V dropout voltage, 95 µA quiescent current, and SOT-23-5 package. The primary difference is product status (Active vs. Last Time Buy) and RoHS compliance (ROHS3 vs. non-compliant).

Q: What is the difference between LP2985AIM5-5.0 and LP2985AIM5-5.0/NOPB?

A: The /NOPB suffix indicates lead-free, RoHS3-compliant manufacturing. Electrical and mechanical specifications are identical. The /NOPB variant is Active status with higher inventory availability.

Q: Is LD2985BM50R from STMicroelectronics a suitable substitute?

A: Yes, for most applications. The LD2985BM50R maintains identical 5V output, 150mA current, SOT-23-5 package, and operating temperature range. Quiescent current is 150 µA (vs. 95 µA) and maximum supply current is 4 mA (vs. 2.5 mA). These differences are minor and do not affect functionality in standard applications.

Q: Why are there multiple LP2985 variants with different suffixes?

A: Suffixes indicate packaging format (tape & reel vs. cut tape), temperature grade, and RoHS compliance status. All variants with identical base specifications (LP2985-50, LP2985A-50, LP2985IM5-5.0) are electrically equivalent and interchangeable at the circuit level.

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

A: LP2985A-50DBVR with 80100 pcs inventory and Active product status provides the strongest long-term supply assurance. LP2985AIM5-5.0/NOPB and LP2985AIM5X-5.0/NOPB are secondary options with 25200 and 26400 pcs respectively.

Q: Are all substitute parts RoHS3 compliant?

A: All Texas Instruments LP2985 variants listed are ROHS3 compliant except the original LP2985AIM5-5.0 (RoHS non-compliant). The STMicroelectronics LD2985BM50R is ROHS3 compliant.

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