LP2985-33DBVRG4 Equivalent & Substitute Parts

Part Overview

The LP2985-33DBVRG4 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 3.3V output at 150mA in a SOT-23-5 surface mount package. This part is discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing production and design requirements. The device provides integrated protection features including over-current, over-temperature, and short-circuit protection, with an enable control feature for power management applications.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	3.3V
Output Current	150mA
Input Voltage (Max)	16V
Dropout Voltage @ 150mA	0.58V
Quiescent Current	95 µA
Package	SOT-23-5 (SC-74A)
Operating Temperature	-40°C to 125°C
Protection Features	Over Current, Over Temperature, Short Circuit
Control Features	Enable
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the LP2985-33DBVRG4 is determined by the following critical parameters:

Output voltage specification (3.3V fixed)
Output current capability (minimum 150mA)
Package type (SOT-23-5)
Input voltage rating (16V maximum)
Protection and control features (Enable, Over Current, Over Temperature, Short Circuit)
Operating temperature range (-40°C to 125°C)
RoHS3 compliance

Substitute parts are grouped into two categories:

MFR Recommended Substitutes: Parts with identical electrical specifications and active product status, offering direct replacement capability.

Parametric Equivalents: Parts with matching core specifications but different product status or minor parameter variations, suitable for applications where the original part is unavailable.

Parameter Comparison

Part Number	Manufacturer	Output Current	Dropout Voltage	Quiescent Current	Package	Product Status	Inventory
LP2985-33DBVRG4	Texas Instruments	150mA	0.58V @ 150mA	95 µA	SOT-23-5	Discontinued at DiGi Electronics	2100 Pcs
LP2985AIM5-3.3/NOPB	Texas Instruments	150mA	0.58V @ 150mA	95 µA	SOT-23-5	Active	25100 Pcs
LP2985IM5-3.3/NOPB	Texas Instruments	150mA	0.58V @ 150mA	95 µA	SOT-23-5	Active	16043 Pcs
LP2992AIM5-3.3/NOPB	Texas Instruments	250mA	0.85V @ 250mA	95 µA	SOT-23-5	Active	29700 Pcs
LP2992AIM5X-3.3/NOPB	Texas Instruments	250mA	0.85V @ 250mA	95 µA	SOT-23-5	Active	23113 Pcs
LP2992IM5-3.3/NOPB	Texas Instruments	250mA	0.85V @ 250mA	95 µA	SOT-23-5	Active	18800 Pcs
LP2992IM5X-3.3/NOPB	Texas Instruments	250mA	0.85V @ 250mA	95 µA	SOT-23-5	Active	18900 Pcs
LP2985-33DBVR	Texas Instruments	150mA	0.58V @ 150mA	95 µA	SOT-23-5	Active	55200 Pcs
LP2985-33DBVRE4	Texas Instruments	150mA	0.58V @ 150mA	95 µA	SOT-23-5	Discontinued at DiGi Electronics	2290 Pcs
LP2985-33DBVT	Texas Instruments	150mA	0.575V @ 150mA	125 µA	SOT-23-5	Active	3330 Pcs
LP2985A-33DBVR	Texas Instruments	150mA	0.58V @ 150mA	95 µA	SOT-23-5	Active	56200 Pcs

Engineering Selection Recommendations

For direct replacement of the LP2985-33DBVRG4, select from the MFR Recommended Substitutes with active product status:

Primary Recommendation: LP2985A-33DBVR or LP2985AIM5-3.3/NOPB. Both parts maintain identical electrical specifications (150mA output, 0.58V dropout, 95µA quiescent current) and are actively manufactured by Texas Instruments with ROHS3 compliance and unlimited moisture sensitivity rating.

Secondary Recommendation: LP2985IM5-3.3/NOPB provides equivalent performance with active status and substantial inventory availability.

Higher Current Alternative: LP2992 series parts (LP2992AIM5-3.3/NOPB, LP2992IM5-3.3/NOPB) support 250mA output current in the same SOT-23-5 package. These are suitable for applications requiring higher current capacity while maintaining 3.3V output and identical protection features. Note the increased dropout voltage (0.85V @ 250mA) and quiescent current (95µA).

Parametric Equivalent: LP2985-33DBVR offers identical specifications to the original part with active product status and highest inventory availability (55200 Pcs), making it the most accessible option for sustained supply.

All recommended substitutes maintain ROHS3 compliance, unlimited MSL rating, and identical protection features (Over Current, Over Temperature, Short Circuit) with Enable control functionality.

Frequently Asked Questions (FAQ)

Q: Can LP2985AIM5-3.3/NOPB directly replace LP2985-33DBVRG4?

A: Yes. Both parts share identical electrical specifications: 3.3V fixed output, 150mA current, 0.58V dropout voltage, 95µA quiescent current, SOT-23-5 package, and identical protection features. The primary difference is product status—LP2985AIM5-3.3/NOPB is actively manufactured while LP2985-33DBVRG4 is discontinued.

Q: What is the difference between LP2985 and LP2992 series?

A: The LP2992 series supports higher output current (250mA vs. 150mA) in the same SOT-23-5 package. This results in increased dropout voltage (0.85V @ 250mA vs. 0.58V @ 150mA). LP2992 is suitable for applications requiring higher current capacity; LP2985 is appropriate for 150mA or lower current requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and unlimited moisture sensitivity level (MSL 1), matching the original part's environmental and regulatory certifications.

Q: What packaging options are available?

A: All substitute parts use SOT-23-5 (SC-74A) surface mount package. Packaging format varies between Cut Tape (CT) & Digi-Reel and Tape & Reel (TR) options depending on the specific part number. Verify packaging format with your supplier for procurement requirements.

Q: Can I use LP2985-33DBVT as a substitute?

A: LP2985-33DBVT is parametrically equivalent with active product status. However, it has slightly higher quiescent current (125µA vs. 95µA) and marginally lower dropout voltage (0.575V vs. 0.58V). It is suitable for applications where these minor variations are acceptable.

Q: Which substitute has the best inventory availability?

A: LP2985A-33DBVR and LP2985-33DBVR offer the highest inventory levels (56200 Pcs and 55200 Pcs respectively) with active product status and identical electrical specifications to the original part.

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