LP2985-50DBVTG4 Equivalent & Substitute Parts

Part Overview

The LP2985-50DBVTG4 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 5V 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 design support and procurement. The device provides regulated 5V output with integrated protection features including over-current, over-temperature, and short-circuit protection, suitable for low-power applications requiring stable voltage regulation.

Key Parameters

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

Substitute Part Grouping Explanation

Substitute parts for the LP2985-50DBVTG4 are categorized based on the following substitution criteria:

Direct Parametric Equivalents (150mA Output Current): Parts maintaining identical electrical specifications including 5V fixed output, 150mA output current, 0.58V dropout voltage, and SOT-23-5 packaging. These parts are pin-compatible and functionally interchangeable.

Manufacturer Recommended Alternatives (150mA Output Current): Active production variants from Texas Instruments with identical electrical performance but different packaging codes or tape/reel configurations.

Higher Current Alternatives (250mA Output Current): LP2992 series regulators providing increased output current capability (250mA) while maintaining 5V fixed output, SOT-23-5 packaging, and identical control/protection features. These are suitable for applications requiring higher current delivery.

Key Substitution Parameters:

Output voltage: 5V fixed
Package type: SOT-23-5 (SC-74A)
Mounting: Surface mount
Protection features: Over current, over temperature, short circuit
Control features: Enable function
Operating temperature range: -40°C to 125°C

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Input Voltage (Max)	Dropout Voltage	Quiescent Current	Package	Product Status	Inventory
LP2985-50DBVTG4	Texas Instruments	5V	150mA	16V	0.58V @ 150mA	95 µA	SOT-23-5	Discontinued	640 Pcs
LP2985-50DBVT	Texas Instruments	5V	150mA	16V	0.58V @ 150mA	95 µA	SOT-23-5	Active	2000 Pcs
LP2985-50DBVR	Texas Instruments	5V	150mA	16V	0.58V @ 150mA	95 µA	SOT-23-5	Active	32100 Pcs
LP2985A-50DBVR	Texas Instruments	5V	150mA	16V	0.58V @ 150mA	95 µA	SOT-23-5	Active	80100 Pcs
LP2985A-50DBVT	Texas Instruments	5V	150mA	16V	0.58V @ 150mA	95 µA	SOT-23-5	Active	9800 Pcs
LP2985AIM5-5.0/NOPB	Texas Instruments	5V	150mA	16V	0.58V @ 150mA	95 µA	SOT-23-5	Active	25200 Pcs
LP2985AIM5X-5.0/NOPB	Texas Instruments	5V	150mA	16V	0.58V @ 150mA	95 µA	SOT-23-5	Active	27990 Pcs
LP2992AIM5-5.0/NOPB	Texas Instruments	5V	250mA	16V	0.85V @ 250mA	95 µA	SOT-23-5	Active	17348 Pcs
LP2992AIM5X-5.0/NOPB	Texas Instruments	5V	250mA	16V	0.85V @ 250mA	95 µA	SOT-23-5	Active	6380 Pcs
LP2992IM5-5.0/NOPB	Texas Instruments	5V	250mA	16V	0.85V @ 250mA	95 µA	SOT-23-5	Active	1218 Pcs

Engineering Selection Recommendations

For Direct Replacement (150mA Applications):

LP2985A-50DBVR and LP2985AIM5X-5.0/NOPB are recommended as primary substitutes. Both are active production parts with ROHS3 compliance and REACH unaffected status. LP2985A-50DBVR offers the highest inventory availability (80100 Pcs) with cut tape and digi-reel packaging options. LP2985AIM5X-5.0/NOPB provides equivalent performance with 27990 Pcs in stock.

LP2985-50DBVT is an active manufacturer-recommended alternative with 2000 Pcs available, suitable for applications where specific packaging configurations are required.

For Higher Current Applications (250mA):

LP2992AIM5-5.0/NOPB and LP2992AIM5X-5.0/NOPB are suitable upgrades when application requirements exceed 150mA output current. Both maintain 5V fixed output and SOT-23-5 packaging with active product status and full compliance certifications. LP2992AIM5-5.0/NOPB has 17348 Pcs in stock.

Compliance Considerations:

All recommended active substitutes maintain ROHS3 compliance and REACH unaffected status. LP2985AIM5-5.0 is marked as Last Time Buy with RoHS non-compliant and REACH affected status, limiting its suitability for new designs.

Frequently Asked Questions (FAQ)

Q: Can LP2992 series parts replace LP2985 in existing designs?

A: LP2992 series parts are pin-compatible and functionally compatible in SOT-23-5 packaging. The primary difference is increased output current capability (250mA vs 150mA) and slightly higher dropout voltage (0.85V vs 0.58V @ rated current). They are suitable replacements for applications not requiring the lower dropout voltage specification of the LP2985.

Q: What is the difference between LP2985-50DBVR and LP2985-50DBVT packaging codes?

A: Both parts are identical in electrical specifications and SOT-23-5 package type. The suffix difference indicates different tape and reel configurations. DBVR denotes cut tape and digi-reel packaging, while DBVT indicates alternative packaging configuration. Selection depends on procurement and assembly requirements.

Q: Are LP2985AIM5X-5.0/NOPB and LP2985AIM5-5.0/NOPB interchangeable?

A: Both parts are electrically identical with 5V fixed output and 150mA current rating in SOT-23-5 packaging. LP2985AIM5X-5.0/NOPB is active production with ROHS3 compliance. LP2985AIM5-5.0/NOPB is marked Last Time Buy with RoHS non-compliant status. For new designs, LP2985AIM5X-5.0/NOPB is recommended.

Q: What does the /NOPB suffix indicate?

A: The /NOPB suffix indicates "No Plumbum" (lead-free) packaging, confirming RoHS compliance. Parts with this designation meet lead-free soldering requirements and environmental regulations.

Q: Can I use LP2985A variants as direct replacements for LP2985 variants?

A: Yes. LP2985A variants are functionally equivalent to LP2985 variants with identical electrical specifications, output voltage, current rating, and SOT-23-5 packaging. The "A" designation indicates an improved or updated version of the base LP2985 design, maintaining full compatibility.

Q: What is the significance of the 0.58V dropout voltage specification?

A: Dropout voltage determines the minimum input-to-output voltage differential required for proper regulation. At 0.58V dropout with 5V output, the minimum input voltage is approximately 5.58V. Applications with input voltages close to the output voltage should verify dropout voltage compatibility before substitution.

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