LP2985A-28DBVT Equivalent & Substitute Parts

Part Overview

The LP2985A-28DBVT is a linear voltage regulator IC from Texas Instruments, classified as a positive fixed output Power Management IC (PMIC). It delivers 150mA at a fixed 2.8V output with a maximum input voltage of 16V and dropout voltage of 0.58V at full load. The device integrates over-current, over-temperature, and short-circuit protection with an enable control feature.

The LP2985A-28DBVT carries an Obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support long-term production requirements for applications currently using this regulator.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	2.8V
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 for the LP2985A-28DBVT is determined by the following critical parameters:

Fixed output voltage of 2.8V
Output current capability of 150mA (or higher)
Maximum input voltage of 16V or greater
SOT-23-5 package compatibility
Operating temperature range of -40°C to 125°C
Enable control feature
Protection against over-current, over-temperature, and short-circuit conditions

Parts meeting all these criteria are classified as parametric equivalents. Parts with minor deviations in secondary parameters (quiescent current, PSRR, dropout voltage within acceptable margins) are listed as manufacturer-recommended alternatives when they maintain functional compatibility within the specified electrical envelope.

Parameter Comparison

Part Number	Manufacturer	Status	Output (mA)	Vin (Max)	Vdrop (Max)	Iq (µA)	Package	RoHS
LP2985A-28DBVT	Texas Instruments	Obsolete	150	16V	0.58V @ 150mA	95	SOT-23-5	ROHS3
LP2985-28DBVR	Texas Instruments	Active	150	16V	0.58V @ 150mA	95	SOT-23-5	ROHS3
LP2985-28DBVT	Texas Instruments	Obsolete	150	16V	0.58V @ 150mA	95	SOT-23-5	ROHS3
LP2985A-28DBVR	Texas Instruments	Last Time Buy	150	16V	0.58V @ 150mA	95	SOT-23-5	ROHS3
LP2985AIM5-2.8	Texas Instruments	Not For New Designs	150	16V	0.58V @ 150mA	95	SOT-23-5	Non-compliant
LP2985AIM5X-2.8/NOPB	Texas Instruments	Active	150	16V	0.58V @ 150mA	95	SOT-23-5	ROHS3
LP2985IM5-2.8/NOPB	Texas Instruments	Active	150	16V	0.58V @ 150mA	95	SOT-23-5	ROHS3
LP2985IM5X-2.8/NOPB	Texas Instruments	Active	150	16V	0.58V @ 150mA	95	SOT-23-5	ROHS3
LD2985BM28R	STMicroelectronics	Active	150	16V	0.575V @ 150mA	150	SOT-23-5	ROHS3
NJM2864F28-TE1	Nisshinbo Micro Devices	Active	100	14V	0.1V @ 60mA	180	SOT-23-5	Not specified

Engineering Selection Recommendations

Primary Substitutes (Full Parametric Equivalents):

LP2985-28DBVR and LP2985IM5-2.8/NOPB are the preferred substitutes. Both are Active status parts from Texas Instruments with identical electrical specifications to the LP2985A-28DBVT, ROHS3 compliance, and equivalent inventory availability. LP2985-28DBVR offers the highest stock level (29,300 units) and is recommended for immediate procurement.

Secondary Substitutes (Texas Instruments Family):

LP2985AIM5X-2.8/NOPB and LP2985IM5X-2.8/NOPB maintain full parametric equivalence with Active product status and ROHS3 compliance. These variants are suitable for new designs and long-term supply assurance.

Alternative Manufacturer Substitute:

LD2985BM28R from STMicroelectronics is functionally compatible with marginally higher quiescent current (150 µA vs. 95 µA) and dropout voltage (0.575V vs. 0.58V). It maintains 150mA output capability, 16V maximum input, SOT-23-5 packaging, and ROHS3 compliance. This part is recommended only when Texas Instruments variants are unavailable.

Not Recommended:

LP2985AIM5-2.8 carries RoHS non-compliance and Not For New Designs status. NJM2864F28-TE1 has reduced output current (100mA vs. 150mA) and lower maximum input voltage (14V vs. 16V), making it unsuitable for applications requiring full 150mA delivery.

Frequently Asked Questions (FAQ)

Q: Can LP2985-28DBVR directly replace LP2985A-28DBVT without PCB modifications?

A: Yes. Both parts use identical SOT-23-5 packaging, pin configuration, and electrical specifications. No PCB layout changes are required. The only difference is product status (Active vs. Obsolete) and packaging format (Tape & Reel vs. Tape & Reel).

Q: What is the difference between LP2985A-28DBVT and LP2985-28DBVT?

A: Both are Texas Instruments parts with identical electrical parameters and SOT-23-5 packaging. The primary distinction is product status: LP2985A-28DBVT is Obsolete, while LP2985-28DBVT is also Obsolete but listed separately in the product line. LP2985-28DBVR (Active status) is the recommended upgrade path.

Q: Is LD2985BM28R from STMicroelectronics a suitable replacement?

A: LD2985BM28R is functionally compatible for most applications. It delivers 150mA at 2.8V with 16V maximum input and SOT-23-5 packaging. However, it has higher quiescent current (150 µA vs. 95 µA) and marginally higher dropout voltage (0.575V vs. 0.58V). Use this part only when Texas Instruments equivalents are unavailable and power consumption or dropout performance are not critical constraints.

Q: Why is NJM2864F28-TE1 listed but not recommended?

A: NJM2864F28-TE1 has reduced output current (100mA vs. 150mA) and lower maximum input voltage (14V vs. 16V). It is not suitable for applications requiring the full 150mA output specification of the LP2985A-28DBVT.

Q: What is the difference between tape & reel and cut tape packaging?

A: Tape & Reel (TR) packaging is supplied on continuous carrier tape wound on reels for automated assembly. Cut Tape (CT) packaging is the same component but cut from the reel and supplied in smaller quantities. Both formats use identical SOT-23-5 components with no electrical or functional differences. Selection depends on production volume and assembly equipment compatibility.

Q: Are all listed substitutes ROHS3 compliant?

A: Most are ROHS3 compliant. LP2985AIM5-2.8 is RoHS non-compliant and should not be used in applications requiring RoHS certification. NJM2864F28-TE1 does not specify RoHS status in the provided data. Verify compliance requirements with your procurement or quality department before final part selection.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message