LP2985IM5X-2.8 Equivalent & Substitute Parts

Part Overview

The LP2985IM5X-2.8 is a linear voltage regulator IC from Texas Instruments, delivering a fixed positive output of 2.8V at 150mA in a surface-mount SOT-23-5 package. This device is classified as Obsolete, indicating it has reached end-of-life status. Finding equivalent and substitute parts is necessary for ongoing production support, design updates, and inventory management when the original part becomes unavailable.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Output Voltage (Fixed)	2.8V
Output Current	150mA
Input Voltage (Max)	16V
Voltage Dropout (Max)	0.58V @ 150mA
Quiescent Current	95 µA
Package Type	SOT-23-5 (SC-74A, SOT-753)
Operating Temperature Range	-40°C ~ 125°C
Control Features	Enable
Protection Features	Over Current, Over Temperature, Short Circuit
PSRR	45dB (1kHz)

Substitute Part Grouping Explanation

Substitute parts for the LP2985IM5X-2.8 are grouped into two categories based on substitution criteria:

Parametric Equivalents (Texas Instruments LP2985 Series)

These parts share identical electrical specifications with the main part: 2.8V fixed output, 150mA output current, 16V maximum input voltage, 0.58V dropout voltage at 150mA, 95 µA quiescent current, and SOT-23-5 packaging. Differences exist only in product status and packaging format (Tape & Reel vs. Cut Tape). These parts are direct functional replacements.

Included parts: LP2985-28DBVR, LP2985-28DBVT, LP2985A-28DBVR, LP2985A-28DBVT, LP2985AIM5-2.8, LP2985AIM5X-2.8/NOPB, LP2985IM5-2.8/NOPB, LP2985IM5X-2.8/NOPB

Manufacturer-Recommended Alternatives (Cross-Manufacturer)

These parts provide functional equivalence with minor parameter variations acceptable for most applications. LD2985BM28R (STMicroelectronics) maintains the same output voltage, current rating, and package but has slightly higher quiescent current (150 µA vs. 95 µA) and maximum supply current (4 mA vs. 2.5 mA). LT1761ES5-2.8#TRMPBF (Analog Devices) operates at a lower output current rating (100mA vs. 150mA) and lower dropout voltage (0.45V @ 100mA), with enhanced PSRR (65dB @ 120Hz) and additional reverse polarity protection.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Input Voltage (Max)	Dropout Voltage	Quiescent Current	Package	Product Status	RoHS Status
LP2985IM5X-2.8	Texas Instruments	2.8V	150mA	16V	0.58V @ 150mA	95 µA	SOT-23-5	Obsolete	RoHS non-compliant
LP2985-28DBVR	Texas Instruments	2.8V	150mA	16V	0.58V @ 150mA	95 µA	SOT-23-5	Active	ROHS3 Compliant
LP2985-28DBVT	Texas Instruments	2.8V	150mA	16V	0.58V @ 150mA	95 µA	SOT-23-5	Obsolete	ROHS3 Compliant
LP2985A-28DBVR	Texas Instruments	2.8V	150mA	16V	0.58V @ 150mA	95 µA	SOT-23-5	Last Time Buy	ROHS3 Compliant
LP2985A-28DBVT	Texas Instruments	2.8V	150mA	16V	0.58V @ 150mA	95 µA	SOT-23-5	Obsolete	ROHS3 Compliant
LP2985AIM5-2.8	Texas Instruments	2.8V	150mA	16V	0.58V @ 150mA	95 µA	SOT-23-5	Not For New Designs	RoHS non-compliant
LP2985AIM5X-2.8/NOPB	Texas Instruments	2.8V	150mA	16V	0.58V @ 150mA	95 µA	SOT-23-5	Active	ROHS3 Compliant
LP2985IM5-2.8/NOPB	Texas Instruments	2.8V	150mA	16V	0.58V @ 150mA	95 µA	SOT-23-5	Active	ROHS3 Compliant
LP2985IM5X-2.8/NOPB	Texas Instruments	2.8V	150mA	16V	0.58V @ 150mA	95 µA	SOT-23-5	Active	ROHS3 Compliant
LD2985BM28R	STMicroelectronics	2.8V	150mA	16V	0.575V @ 150mA	150 µA	SOT-23-5	Active	ROHS3 Compliant
LT1761ES5-2.8#TRMPBF	Analog Devices Inc.	2.8V	100mA	20V	0.45V @ 100mA	Not specified	TSOT-23-5	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications)

LP2985-28DBVR is the primary recommended substitute. It maintains all electrical parameters of the LP2985IM5X-2.8 while offering Active product status and ROHS3 compliance. This part is available in Tape & Reel packaging and provides the most straightforward migration path with no design modifications required.

LP2985IM5-2.8/NOPB and LP2985IM5X-2.8/NOPB are alternative Texas Instruments options with Active status and ROHS3 compliance, suitable for new production runs.

For RoHS Compliance Upgrade

If RoHS compliance is a requirement, LP2985-28DBVR, LP2985A-28DBVR, LP2985AIM5X-2.8/NOPB, LP2985IM5-2.8/NOPB, and LP2985IM5X-2.8/NOPB all meet ROHS3 standards while maintaining identical electrical specifications.

For Cross-Manufacturer Alternatives

LD2985BM28R (STMicroelectronics) is suitable when Texas Instruments parts are unavailable. The 55 µA increase in quiescent current and 1.5 mA increase in maximum supply current are negligible for most applications. Active product status ensures long-term availability.

LT1761ES5-2.8#TRMPBF (Analog Devices) is applicable only for applications requiring 100mA or less output current. The lower dropout voltage and enhanced PSRR provide performance advantages in noise-sensitive circuits. The higher maximum input voltage (20V vs. 16V) offers additional design margin.

Frequently Asked Questions (FAQ)

Q: Can LP2985-28DBVR be used as a direct replacement for LP2985IM5X-2.8?

A: Yes. Both parts deliver identical electrical performance: 2.8V fixed output, 150mA output current, 0.58V dropout voltage at 150mA, 95 µA quiescent current, and SOT-23-5 packaging. The primary difference is product status (Active vs. Obsolete) and RoHS compliance (ROHS3 vs. non-compliant). No circuit modifications are required.

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

A: Both parts are electrically identical. The difference is packaging format: DBVR indicates Tape & Reel (TR) packaging, while DBVT indicates Tape & Reel (TR) as well. Consult the supplier device package specification for exact reel configuration and quantity per reel.

Q: Can LD2985BM28R replace LP2985IM5X-2.8 in all applications?

A: LD2985BM28R is functionally equivalent for most applications. The quiescent current is 150 µA versus 95 µA, and maximum supply current is 4 mA versus 2.5 mA. These differences are acceptable in applications where power consumption is not critical. The dropout voltage is nearly identical (0.575V vs. 0.58V). Verify that the increased quiescent current does not impact your specific application's power budget.

Q: Is LT1761ES5-2.8#TRMPBF a suitable substitute?

A: LT1761ES5-2.8#TRMPBF is suitable only for applications requiring 100mA or less output current. The LP2985IM5X-2.8 is rated for 150mA, so this part cannot be used if your circuit draws more than 100mA. The lower dropout voltage (0.45V @ 100mA) and higher PSRR (65dB @ 120Hz) provide performance benefits for noise-sensitive applications within the 100mA limit.

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

A: Yes. All listed substitutes use SOT-23-5 packaging (designated as SC-74A or SOT-753 in some datasheets). LT1761ES5-2.8#TRMPBF uses TSOT-23-5 (thin variant), which is mechanically and electrically compatible with standard SOT-23-5 footprints.

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

A: LP2985-28DBVR, LP2985IM5-2.8/NOPB, and LP2985IM5X-2.8/NOPB all carry Active product status from Texas Instruments, ensuring continued production and supply. LD2985BM28R and LT1761ES5-2.8#TRMPBF are also Active from their respective manufacturers.

Q: Do all substitutes meet RoHS requirements?

A: Most substitutes are ROHS3 compliant. The exceptions are LP2985IM5X-2.8 (original part, RoHS non-compliant) and LP2985AIM5-2.8 (RoHS non-compliant). For RoHS-compliant designs, select from LP2985-28DBVR, LP2985-28DBVT, LP2985A-28DBVR, LP2985A-28DBVT, LP2985AIM5X-2.8/NOPB, LP2985IM5-2.8/NOPB, LP2985IM5X-2.8/NOPB, LD2985BM28R, or LT1761ES5-2.8#TRMPBF.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message