LP2985A-28DBVR Equivalent & Substitute Parts

Part Overview

The LP2985A-28DBVR is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. This device delivers a fixed 2.8V output at 150mA in a surface-mount SOT-23-5 package. The part is currently in Last Time Buy status, indicating end-of-life production. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain flexibility, and support long-term product availability for applications requiring this specific voltage regulation function.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	2.8V
Output Current	150mA
Input Voltage (Max)	16V
Voltage Dropout (Max)	0.58V @ 150mA
Quiescent Current (Iq)	95 µA
PSRR	45dB (1kHz)
Operating Temperature Range	-40°C ~ 125°C
Package / Case	SC-74A, SOT-753 (SOT-23-5)
Protection Features	Over Current, Over Temperature, Short Circuit
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the LP2985A-28DBVR is determined by the following critical parameters:

Fixed output voltage of 2.8V
Minimum output current capability of 150mA
Maximum input voltage of 16V or greater
SOT-23-5 package compatibility
Operating temperature range of -40°C to 125°C
Surface-mount mounting type

Parts are grouped into three categories: Texas Instruments direct equivalents (same manufacturer, identical electrical specifications), cross-manufacturer equivalents (different manufacturer, matching electrical specifications), and parametric equivalents with minor variations in quiescent current or dropout voltage that remain functionally compatible within the specified operating parameters.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Dropout (Max)	Iq (Max)	Product Status	RoHS Status	Packaging
LP2985A-28DBVR	Texas Instruments	2.8V	150mA	0.58V @ 150mA	95 µA	Last Time Buy	ROHS3 Compliant	Cut Tape (CT)
LP2985IM5-2.8/NOPB	Texas Instruments	2.8V	150mA	0.58V @ 150mA	95 µA	Active	ROHS3 Compliant	Tape & Reel (TR)
LP2985-28DBVR	Texas Instruments	2.8V	150mA	0.58V @ 150mA	95 µA	Active	ROHS3 Compliant	Tape & Reel (TR)
LP2985-28DBVT	Texas Instruments	2.8V	150mA	0.58V @ 150mA	95 µA	Obsolete	ROHS3 Compliant	Tape & Reel (TR)
LP2985A-28DBVT	Texas Instruments	2.8V	150mA	0.58V @ 150mA	95 µA	Obsolete	ROHS3 Compliant	Tape & Reel (TR)
LP2985AIM5-2.8	Texas Instruments	2.8V	150mA	0.58V @ 150mA	95 µA	Not For New Designs	RoHS non-compliant	Tape & Reel (TR)
LP2985AIM5X-2.8/NOPB	Texas Instruments	2.8V	150mA	0.58V @ 150mA	95 µA	Active	ROHS3 Compliant	Tape & Reel (TR)
LP2985IM5X-2.8/NOPB	Texas Instruments	2.8V	150mA	0.58V @ 150mA	95 µA	Active	ROHS3 Compliant	Tape & Reel (TR)
LD2985BM28R	STMicroelectronics	2.8V	150mA	0.575V @ 150mA	150 µA	Active	ROHS3 Compliant	Tape & Reel (TR)
MIC5205-2.8YM5-TR	Microchip Technology	2.8V	150mA	0.35V @ 150mA	150 µA	Active	ROHS3 Compliant	Cut Tape (CT) & Digi-Reel®
MIC5207-2.8YM5-TR	Microchip Technology	2.8V	180mA	0.4V @ 150mA	170 µA	Active	ROHS3 Compliant	Tape & Reel (TR)

Engineering Selection Recommendations

Primary Recommendation (Direct Replacement): LP2985IM5-2.8/NOPB is the preferred substitute for LP2985A-28DBVR. Both parts are manufactured by Texas Instruments with identical electrical specifications, matching output voltage, current rating, dropout voltage, and quiescent current. The primary difference is packaging format: LP2985IM5-2.8/NOPB is supplied in Tape & Reel (TR) format versus the original Cut Tape (CT) format. Both are ROHS3 compliant and currently in Active product status, ensuring long-term availability.

Secondary Recommendations (Texas Instruments Variants): LP2985AIM5X-2.8/NOPB and LP2985IM5X-2.8/NOPB are functionally equivalent alternatives, both in Active status with ROHS3 compliance. These variants offer identical electrical performance and are suitable for new designs.

Cross-Manufacturer Alternatives: LD2985BM28R (STMicroelectronics) and MIC5205-2.8YM5-TR (Microchip Technology) are parametric equivalents with identical output voltage and current ratings. Both are ROHS3 compliant and in Active status. Minor differences exist: LD2985BM28R has slightly higher quiescent current (150 µA vs. 95 µA) and marginally higher dropout voltage (0.575V vs. 0.58V). MIC5205-2.8YM5-TR features lower dropout voltage (0.35V) and higher quiescent current (150 µA), with enhanced PSRR performance (75dB at 100Hz).

Higher Current Alternative: MIC5207-2.8YM5-TR provides 180mA output current capability, exceeding the 150mA requirement. This part is suitable only if the application can accommodate the higher quiescent current (170 µA) and different PSRR specification.

Parts to Avoid: LP2985AIM5-2.8 is marked "Not For New Designs" and is RoHS non-compliant. LP2985-28DBVT and LP2985A-28DBVT are obsolete and should not be selected for new applications.

Frequently Asked Questions (FAQ)

Q: Can LP2985IM5-2.8/NOPB directly replace LP2985A-28DBVR in existing designs? A: Yes. Both parts deliver identical electrical performance: 2.8V fixed output, 150mA current, 0.58V dropout voltage, and 95 µA quiescent current. The only difference is packaging format (Tape & Reel vs. Cut Tape). PCB layout and circuit design require no modification.

Q: What is the difference between Cut Tape (CT) and Tape & Reel (TR) packaging? A: Cut Tape is supplied as individual strips cut to specific lengths, typically for lower-volume or manual assembly operations. Tape & Reel is continuous reel format optimized for automated pick-and-place assembly. Both formats contain identical components; the difference is in supply and handling method.

Q: Are cross-manufacturer parts (STMicroelectronics, Microchip) fully compatible? A: LD2985BM28R and MIC5205-2.8YM5-TR are parametrically equivalent and functionally compatible. All critical specifications (output voltage, current rating, package, temperature range) match the original part. Minor variations in quiescent current and dropout voltage fall within acceptable operating margins for most applications. Verify specific application requirements before selection.

Q: Why does MIC5207-2.8YM5-TR have higher output current (180mA)? A: MIC5207-2.8YM5-TR is a higher-performance variant in the Microchip MIC5207 series. The 180mA rating provides additional design margin. This part is suitable only if the application can tolerate the increased quiescent current (170 µA vs. 95 µA) and different PSRR characteristics.

Q: Is ROHS3 compliance mandatory for substitution? A: ROHS3 compliance is required for new designs and applications subject to EU environmental regulations. LP2985AIM5-2.8 is RoHS non-compliant and should not be used in new applications. All recommended substitutes are ROHS3 compliant.

Q: What does "Last Time Buy" status mean for LP2985A-28DBVR? A: Last Time Buy indicates the manufacturer has announced end-of-life production. Existing inventory may be available, but no new manufacturing runs are planned. Substitution to an Active-status part (such as LP2985IM5-2.8/NOPB) is recommended for long-term supply security.

Q: Can I use parts marked "Obsolete" or "Not For New Designs"? A: These parts should be avoided for new designs. Obsolete parts have no guaranteed future availability. Parts marked "Not For New Designs" may have compliance or performance limitations. Select only Active-status parts for new applications.

Q: Do all substitute parts use the same SOT-23-5 package? A: Yes. All listed substitutes use the SC-74A / SOT-753 package designation, which is the SOT-23-5 physical form factor. PCB footprints are identical across all parts.

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