LP2985ITP-5.0/NOPB Equivalent & Substitute Parts

Part Overview

The LP2985ITP-5.0/NOPB is a linear voltage regulator IC from Texas Instruments designed for positive fixed 5V output at 150mA capacity in a 5-DSBGA package. This component is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. The part delivers regulated 5V output with integrated protection features including over-current, over-temperature, and short-circuit protection, suitable for low-power applications requiring compact surface-mount solutions.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	5V
Output Current	150mA
Input Voltage (Max)	16V
Dropout Voltage (Max)	0.58V @ 150mA
Quiescent Current	95 µA
PSRR	45dB (1kHz)
Protection Features	Over Current, Over Temperature, Short Circuit
Operating Temperature Range	-40°C ~ 125°C
Package Type	5-DSBGA
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the LP2985ITP-5.0/NOPB are selected based on electrical and mechanical compatibility within the following criteria:

Critical Matching Parameters:

Fixed output voltage of 5V
Output current capability of 150mA minimum
Maximum input voltage of 14V or higher
Positive output configuration
Single regulator output
Surface-mount technology
Enable control feature
Over-current and over-temperature protection
ROHS3 compliance

Package Consideration: The original 5-DSBGA package is obsolete. Substitute parts utilize SOT-23-5 packaging, which is functionally equivalent but requires PCB layout modification. Both packages are surface-mount with comparable footprint dimensions suitable for compact applications.

Parameter Comparison

Parameter	LP2985ITP-5.0/NOPB	LP2985AIM5X-5.0/NOPB	LK112M50TR
Manufacturer	Texas Instruments	Texas Instruments	STMicroelectronics
Output Voltage	5V	5V	5V
Output Current	150mA	150mA	150mA
Input Voltage (Max)	16V	16V	14V
Dropout Voltage (Max)	0.58V @ 150mA	0.58V @ 150mA	0.35V @ 150mA
Quiescent Current	95 µA	95 µA	250 µA
PSRR	45dB (1kHz)	45dB (1kHz)	55dB (400Hz)
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-30°C ~ 125°C
Package	5-DSBGA	SOT-23-5	SOT-23-5
Product Status	Obsolete	Active	Active
Protection Features	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

LP2985AIM5X-5.0/NOPB (Texas Instruments): This is the manufacturer-recommended substitute from Texas Instruments. It maintains identical electrical specifications to the original LP2985ITP-5.0/NOPB, including dropout voltage, quiescent current, and PSRR characteristics. The part is in active production status with substantial inventory availability (27,990 pcs). The transition from 5-DSBGA to SOT-23-5 packaging requires PCB redesign but provides superior long-term supply chain stability. ROHS3 compliance and identical operating temperature range ensure direct functional replacement.

LK112M50TR (STMicroelectronics): This STMicroelectronics alternative meets all core electrical requirements with 150mA output current and 5V fixed output. The part demonstrates superior dropout voltage performance (0.35V vs 0.58V) and higher PSRR (55dB at 400Hz vs 45dB at 1kHz). However, quiescent current is elevated at 250 µA compared to 95 µA, and maximum input voltage is limited to 14V versus 16V. Operating temperature minimum is -30°C rather than -40°C. This part is suitable for applications where lower dropout voltage provides design advantages and the higher quiescent current is acceptable. Active production status and high inventory (41,176 pcs) support availability.

Frequently Asked Questions (FAQ)

Q: Can LP2985AIM5X-5.0/NOPB directly replace LP2985ITP-5.0/NOPB without circuit modification?

A: Electrical specifications are identical, enabling direct functional replacement. However, package change from 5-DSBGA to SOT-23-5 requires PCB layout modification. Pin assignments and electrical connections remain compatible.

Q: What are the key differences between LP2985AIM5X-5.0/NOPB and LK112M50TR?

A: Both deliver 150mA at 5V output. LP2985AIM5X-5.0/NOPB maintains identical specifications to the original part. LK112M50TR offers lower dropout voltage (0.35V vs 0.58V) but has higher quiescent current (250 µA vs 95 µA), lower maximum input voltage (14V vs 16V), and narrower operating temperature range (-30°C to 125°C vs -40°C to 125°C).

Q: Is the SOT-23-5 package suitable for my application if the original used 5-DSBGA?

A: SOT-23-5 is a standard surface-mount package with comparable thermal and electrical performance. PCB footprint and layout differ, requiring design modification. Both packages support the same electrical specifications and current ratings.

Q: Are both substitute parts ROHS3 compliant?

A: Yes. LP2985AIM5X-5.0/NOPB and LK112M50TR are both ROHS3 compliant, matching the original part's environmental certification status.

Q: Which substitute part should I select for new designs?

A: LP2985AIM5X-5.0/NOPB is the manufacturer-recommended choice, providing identical electrical performance and active production status. LK112M50TR is suitable if lower dropout voltage is a design requirement and higher quiescent current is acceptable.

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