LP2985-28DBVRE4 Equivalent & Substitute Parts

Part Overview

The LP2985-28DBVRE4 is a linear voltage regulator IC from Texas Instruments, delivering a fixed 2.8V output at 150mA in a SOT-23-5 surface mount package. This part is classified as Obsolete, making equivalent and substitute parts necessary for ongoing production and design continuity. 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 2.8V rails.

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 for the LP2985-28DBVRE4 is determined by strict equivalence across the following critical parameters: fixed output voltage of 2.8V, output current capability of 150mA, maximum input voltage of 16V, SOT-23-5 package compatibility, and operating temperature range of -40°C to 125°C. All substitute parts must maintain these electrical and mechanical specifications to ensure direct functional replacement without circuit redesign.

Substitute parts are grouped into three categories:

Manufacturer Recommended (Texas Instruments): LP2985AIM5X-2.8/NOPB and LP2985IM5-2.8/NOPB represent active production alternatives with identical electrical specifications and improved product status.

Parametric Equivalents (Texas Instruments): LP2985-28DBVR, LP2985-28DBVT, LP2985A-28DBVR, LP2985A-28DBVT, LP2985AIM5-2.8, and LP2985IM5X-2.8/NOPB maintain full electrical and package compatibility with varying product status and packaging formats.

Cross-Manufacturer Alternatives: LD2985BM28R (STMicroelectronics) and MIC5205-2.8YM5-TR (Microchip Technology) provide functional equivalence with minor parameter variations within acceptable tolerances for this application class.

Parameter Comparison

Part Number	Manufacturer	Product Status	Output Voltage	Output Current	Dropout Voltage	Quiescent Current	Package	Packaging Type	RoHS Status
LP2985-28DBVRE4	Texas Instruments	Obsolete	2.8V	150mA	0.58V @ 150mA	95 µA	SOT-23-5	Digi-Reel	ROHS3 Compliant
LP2985AIM5X-2.8/NOPB	Texas Instruments	Active	2.8V	150mA	0.58V @ 150mA	95 µA	SOT-23-5	Tape & Reel	ROHS3 Compliant
LP2985IM5-2.8/NOPB	Texas Instruments	Active	2.8V	150mA	0.58V @ 150mA	95 µA	SOT-23-5	Tape & Reel	ROHS3 Compliant
LP2985-28DBVR	Texas Instruments	Active	2.8V	150mA	0.58V @ 150mA	95 µA	SOT-23-5	Tape & Reel	ROHS3 Compliant
LP2985-28DBVT	Texas Instruments	Obsolete	2.8V	150mA	0.58V @ 150mA	95 µA	SOT-23-5	Tape & Reel	ROHS3 Compliant
LP2985A-28DBVR	Texas Instruments	Last Time Buy	2.8V	150mA	0.58V @ 150mA	95 µA	SOT-23-5	Cut Tape	ROHS3 Compliant
LP2985A-28DBVT	Texas Instruments	Obsolete	2.8V	150mA	0.58V @ 150mA	95 µA	SOT-23-5	Tape & Reel	ROHS3 Compliant
LP2985AIM5-2.8	Texas Instruments	Not For New Designs	2.8V	150mA	0.58V @ 150mA	95 µA	SOT-23-5	Tape & Reel	RoHS non-compliant
LP2985IM5X-2.8/NOPB	Texas Instruments	Active	2.8V	150mA	0.58V @ 150mA	95 µA	SOT-23-5	Tape & Reel	ROHS3 Compliant
LD2985BM28R	STMicroelectronics	Active	2.8V	150mA	0.575V @ 150mA	150 µA	SOT-23-5	Tape & Reel	ROHS3 Compliant
MIC5205-2.8YM5-TR	Microchip Technology	Active	2.8V	150mA	0.35V @ 150mA	150 µA	SOT-23-5	Cut Tape & Digi-Reel	ROHS3 Compliant

Engineering Selection Recommendations

For new production designs, select from active product status parts: LP2985AIM5X-2.8/NOPB, LP2985IM5-2.8/NOPB, LP2985-28DBVR, LD2985BM28R, or MIC5205-2.8YM5-TR. All are ROHS3 compliant and currently manufactured.

For existing designs requiring direct replacement of LP2985-28DBVRE4, LP2985-28DBVR provides identical electrical specifications and active product status from the same manufacturer, ensuring design continuity with no circuit modifications required.

LP2985AIM5X-2.8/NOPB and LP2985IM5-2.8/NOPB are manufacturer-recommended alternatives with active status and full ROHS3 compliance, offering improved long-term availability.

Avoid LP2985AIM5-2.8 due to RoHS non-compliance status. LP2985A-28DBVR and LP2985A-28DBVT are approaching end-of-life and should not be selected for new designs.

Cross-manufacturer alternatives LD2985BM28R and MIC5205-2.8YM5-TR are functionally equivalent with active product status. MIC5205-2.8YM5-TR offers superior dropout voltage performance (0.35V vs 0.58V), beneficial for applications with tight input voltage margins.

Frequently Asked Questions (FAQ)

Q: Can LP2985-28DBVR directly replace LP2985-28DBVRE4?

A: Yes. Both parts share identical electrical specifications: 2.8V fixed output, 150mA output current, 0.58V dropout voltage at 150mA, 95µA quiescent current, and SOT-23-5 package. The primary difference is product status (Active vs Obsolete) and packaging format. No circuit modifications are required.

Q: What is the difference between LP2985AIM5X-2.8/NOPB and LP2985IM5-2.8/NOPB?

A: Both are active Texas Instruments products with identical electrical specifications and ROHS3 compliance. The difference lies in internal die revision (indicated by the "A" designation in the first part number). Both are suitable for new designs and provide equivalent performance.

Q: Is LD2985BM28R from STMicroelectronics a suitable replacement?

A: Yes, LD2985BM28R is functionally equivalent with identical output voltage, current rating, and package. Minor differences include quiescent current (150µA vs 95µA) and dropout voltage (0.575V vs 0.58V), which are within acceptable tolerances for most applications. The part is ROHS3 compliant and actively manufactured.

Q: How does MIC5205-2.8YM5-TR compare to the LP2985 series?

A: MIC5205-2.8YM5-TR maintains the same 2.8V output, 150mA current rating, and SOT-23-5 package. Key advantages include lower dropout voltage (0.35V vs 0.58V) and reverse polarity protection. Quiescent current is slightly higher at 150µA. This part is ideal for applications requiring lower dropout performance.

Q: Why should LP2985AIM5-2.8 be avoided?

A: LP2985AIM5-2.8 is marked as RoHS non-compliant and carries a "Not For New Designs" status. While electrically equivalent, regulatory and supply chain considerations make it unsuitable for new production.

Q: Are all substitute parts available in SOT-23-5 package?

A: Yes. All listed substitute parts use the SOT-23-5 (SC-74A) package, ensuring mechanical and pin compatibility. Packaging formats (Tape & Reel, Cut Tape, Digi-Reel) vary but do not affect electrical performance or PCB mounting.

Q: What packaging format should be selected for automated assembly?

A: Tape & Reel (TR) format is standard for automated pick-and-place assembly. LP2985AIM5X-2.8/NOPB, LP2985IM5-2.8/NOPB, LP2985-28DBVR, LP2985-28DBVT, LP2985A-28DBVT, LP2985AIM5-2.8, LP2985IM5X-2.8/NOPB, and LD2985BM28R are available in Tape & Reel format. MIC5205-2.8YM5-TR is available in Cut Tape & Digi-Reel format.

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