LP2985IM5X-4.0/NOPB Equivalent & Substitute Parts

Part Overview

The LP2985IM5X-4.0/NOPB is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. This positive fixed output regulator delivers 150mA at 4V output with a maximum input voltage of 16V and operates across the industrial temperature range of -40°C to 125°C. The device is in active product status and features integrated protection against overcurrent, overtemperature, and short circuit conditions. Substitute parts are identified when equivalent electrical performance, output configuration, and mechanical compatibility are maintained within the specified parameter tolerances.

Key Parameters

Parameter	Value
Output Configuration	Positive
Output Type	Fixed
Voltage - Output (Min/Fixed)	4V
Voltage - Input (Max)	16V
Current - Output	150mA
Voltage Dropout (Max)	0.58V @ 150mA
Operating Temperature	-40°C ~ 125°C
Package / Case	SC-74A, SOT-753
Mounting Type	Surface Mount
Control Features	Enable
Protection Features	Over Current, Over Temperature, Short Circuit

Substitute Part Grouping Explanation

Substitute parts for the LP2985IM5X-4.0/NOPB are classified based on electrical parameter equivalence and mechanical compatibility. The primary substitution criteria are:

Parametric Equivalents (Texas Instruments LP2985 Series):

LP2985AIM5-4.0/NOPB
LP2985AIM5X-4.0/NOPB
LP2985IM5-4.0/NOPB

These parts maintain identical electrical specifications: 4V fixed output, 150mA output current, 16V maximum input voltage, 0.58V maximum dropout voltage, 95µA quiescent current, and equivalent protection features. Differences exist only in packaging format (Cut Tape vs. Tape & Reel) and temperature grade designation (A-grade vs. standard grade). All operate within -40°C to 125°C and are housed in SC-74A/SOT-753 packages.

Manufacturer Recommended Equivalent (Microchip Technology):

MIC5205-4.0YM5-TR

This cross-manufacturer substitute maintains the same output voltage (4V), output current (150mA), input voltage rating (16V), operating temperature range (-40°C to 125°C), and package format (SC-74A/SOT-753). The MIC5205 series provides equivalent functional performance with identical control and protection feature sets.

Parameter Comparison

Parameter	LP2985IM5X-4.0/NOPB	LP2985AIM5-4.0/NOPB	LP2985AIM5X-4.0/NOPB	LP2985IM5-4.0/NOPB	MIC5205-4.0YM5-TR
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Microchip Technology
Output Voltage (Fixed)	4V	4V	4V	4V	4V
Output Current	150mA	150mA	150mA	150mA	150mA
Input Voltage (Max)	16V	16V	16V	16V	16V
Dropout Voltage (Max)	0.58V @ 150mA	0.58V @ 150mA	0.58V @ 150mA	0.58V @ 150mA	0.35V @ 150mA
Quiescent Current	95µA	95µA	95µA	95µA	150µA
PSRR	45dB (1kHz)	45dB (1kHz)	45dB (1kHz)	45dB (1kHz)	75dB (100Hz)
Protection Features	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Reverse Polarity
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Package / Case	SC-74A, SOT-753	SC-74A, SOT-753	SC-74A, SOT-753	SC-74A, SOT-753	SC-74A, SOT-753
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All listed substitute parts maintain active product status and ROHS3 compliance, ensuring long-term availability and regulatory conformance for industrial applications.

Texas Instruments LP2985 Series Substitutes: The LP2985AIM5-4.0/NOPB, LP2985AIM5X-4.0/NOPB, and LP2985IM5-4.0/NOPB are direct parametric equivalents with identical electrical performance. Selection among these variants depends on packaging requirements: Cut Tape (CT) & Digi-Reel format for LP2985AIM5-4.0/NOPB and LP2985IM5-4.0/NOPB, or Tape & Reel (TR) format for LP2985AIM5X-4.0/NOPB. The A-grade designation in LP2985AIM5 variants indicates tighter manufacturing tolerances compared to standard grade parts.

Microchip Technology MIC5205-4.0YM5-TR: This cross-manufacturer substitute provides equivalent functional performance with measurable improvements in dropout voltage (0.35V versus 0.58V) and power supply rejection ratio (75dB at 100Hz versus 45dB at 1kHz). The MIC5205 includes reverse polarity protection in addition to standard overcurrent and overtemperature protection. Quiescent current is higher at 150µA compared to 95µA for LP2985 variants. This substitute is suitable for applications where lower dropout voltage or enhanced noise rejection provides system-level benefits.

Frequently Asked Questions (FAQ)

Q: Can LP2985AIM5-4.0/NOPB replace LP2985IM5X-4.0/NOPB in production?

A: Yes, both parts deliver identical electrical performance at 4V, 150mA output with 0.58V maximum dropout voltage. The primary difference is packaging format: LP2985AIM5-4.0/NOPB is supplied in Cut Tape & Digi-Reel format, while LP2985IM5X-4.0/NOPB is supplied in Tape & Reel format. Selection depends on assembly line equipment compatibility and procurement logistics.

Q: What are the key differences between LP2985 and MIC5205-4.0YM5-TR?

A: Both regulators provide 4V fixed output at 150mA with identical input voltage ratings and operating temperature ranges. The MIC5205 offers lower dropout voltage (0.35V versus 0.58V) and higher PSRR (75dB versus 45dB), beneficial for noise-sensitive applications. The MIC5205 includes reverse polarity protection, while quiescent current is 150µA compared to 95µA for LP2985 variants. These differences may impact power budget and noise performance in specific circuit designs.

Q: Are all substitute parts available in the same package?

A: Yes, all listed substitute parts use the SC-74A/SOT-753 surface mount package, ensuring mechanical and electrical compatibility on PCB layouts designed for the LP2985IM5X-4.0/NOPB.

Q: Do substitute parts maintain the same compliance certifications?

A: All substitute parts are ROHS3 compliant with MSL rating of 1 (Unlimited), matching the compliance profile of the LP2985IM5X-4.0/NOPB. REACH status is unaffected for all variants.

Q: Which substitute should be selected for lowest power consumption?

A: The LP2985 series variants (LP2985AIM5-4.0/NOPB, LP2985AIM5X-4.0/NOPB, LP2985IM5-4.0/NOPB) provide the lowest quiescent current at 95µA. The MIC5205-4.0YM5-TR operates at 150µA quiescent current, resulting in higher standby power consumption.

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