LP3988IMF-2.85/NOPB Equivalent & Substitute Parts

Part Overview

The LP3988IMF-2.85/NOPB is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) device. It delivers a fixed positive output of 2.85V at 150mA with integrated enable and power good control features, along with over-temperature and short-circuit protection. The device operates across -40°C to 125°C and is housed in a SOT-23-5 surface-mount package.

This part is currently listed as obsolete. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain flexibility, and support ongoing production or maintenance requirements for systems utilizing this regulator.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	2.85V
Output Current	150mA
Input Voltage (Max)	6V
Voltage Dropout (Max)	0.15V @ 150mA
Quiescent Current	120 µA
PSRR	65dB ~ 45dB (1kHz ~ 10kHz)
Control Features	Enable, Power Good
Protection Features	Over Temperature, Short Circuit
Operating Temperature Range	-40°C to 125°C
Package	SOT-23-5 (SC-74A)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the LP3988IMF-2.85/NOPB are grouped based on strict parametric equivalence across the following criteria:

Primary Equivalence Parameters:

Fixed output voltage of 2.85V
Output current rating of 150mA
Maximum input voltage of 6V
SOT-23-5 package family (SOT-23-5 or TSOT-23-5)
Operating temperature range of -40°C to 125°C
RoHS3 compliance and REACH unaffected status

Grouping Categories:

Group 1: Texas Instruments Direct Equivalents (Active Status) Parts LP3988IMFX-2.85/NOPB and LP3988QMFX-2P85 maintain identical electrical specifications to the main part, with the primary distinction being product status (active vs. obsolete) and packaging format (standard vs. automotive-qualified). These represent the most direct substitutes with no performance trade-offs.

Group 2: Microchip Technology Cross-Manufacturer Equivalents (Active Status) Parts MIC5256-2.85YD5-TR and MIC5256-2.85YM5-TR are functionally equivalent across core parameters but originate from a different manufacturer. These parts maintain the same output voltage, current rating, and package compatibility. Minor differences exist in dropout voltage (0.25V vs. 0.15V) and quiescent current (150 µA vs. 120 µA), which remain within acceptable operational margins for most applications.

Parameter Comparison

Parameter	LP3988IMF-2.85/NOPB	LP3988IMFX-2.85/NOPB	LP3988QMFX-2P85	MIC5256-2.85YD5-TR	MIC5256-2.85YM5-TR
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Microchip Technology	Microchip Technology
Output Voltage	2.85V	2.85V	2.85V	2.85V	2.85V
Output Current	150mA	150mA	150mA	150mA	150mA
Input Voltage (Max)	6V	6V	6V	6V	6V
Voltage Dropout (Max)	0.15V @ 150mA	0.15V @ 150mA	0.15V @ 150mA	0.25V @ 150mA	0.25V @ 150mA
Quiescent Current	120 µA	120 µA	120 µA	150 µA	150 µA
PSRR	65dB ~ 45dB (1kHz ~ 10kHz)	65dB ~ 45dB (1kHz ~ 10kHz)	65dB ~ 45dB (1kHz ~ 10kHz)	60dB ~ 45dB (10Hz ~ 10kHz)	60dB ~ 45dB (10Hz ~ 10kHz)
Control Features	Enable, Power Good	Enable, Power Good	Enable, Power Good	Enable	Enable
Protection Features	Over Temperature, Short Circuit	Over Temperature, Short Circuit	Over Temperature, Short Circuit	Over Current, Over Temperature, UVLO	Over Current, Over Temperature, UVLO
Operating Temperature	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C
Package	SOT-23-5	SOT-23-5	SOT-23-5	TSOT-23-5	SOT-23-5
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Preferred): LP3988IMFX-2.85/NOPB is the primary substitute. It maintains identical electrical performance and specifications while offering active product status and higher inventory availability (6615 units). This part is suitable for all applications currently using the obsolete LP3988IMF-2.85/NOPB without design modification.

For Automotive Applications: LP3988QMFX-2P85 is qualified to AEC-Q100 automotive standards and carries active product status. This variant is appropriate for automotive-grade designs requiring regulatory compliance and long-term supply assurance.

For Cross-Manufacturer Flexibility: MIC5256-2.85YM5-TR (SOT-23-5 package) provides functional equivalence from Microchip Technology with active product status. This option is suitable when supply chain diversification is required. The slightly higher dropout voltage (0.25V vs. 0.15V) and quiescent current (150 µA vs. 120 µA) remain within acceptable operational margins for most applications.

MIC5256-2.85YD5-TR (TSOT-23-5 package) offers the same electrical performance as the MIC5256-2.85YM5-TR variant but in a thin SOT-23-5 package format, providing space optimization for compact designs.

All substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory continuity with the original part.

Frequently Asked Questions (FAQ)

Q: Can LP3988IMFX-2.85/NOPB be used as a direct replacement for LP3988IMF-2.85/NOPB?

A: Yes. LP3988IMFX-2.85/NOPB is a parametric equivalent with identical electrical specifications, output voltage, current rating, dropout voltage, and protection features. The primary difference is product status (active vs. obsolete) and packaging format (Tape & Reel). No design modifications are required.

Q: What is the difference between LP3988QMFX-2P85 and LP3988IMFX-2.85/NOPB?

A: Both parts are electrically identical. LP3988QMFX-2P85 carries AEC-Q100 automotive qualification, making it suitable for automotive applications requiring regulatory compliance. Select this variant if your application demands automotive-grade components.

Q: Can Microchip MIC5256 parts replace Texas Instruments LP3988 parts?

A: Yes, with minor operational considerations. MIC5256-2.85YM5-TR and MIC5256-2.85YD5-TR maintain the same output voltage, current rating, and package compatibility. The MIC5256 series exhibits slightly higher dropout voltage (0.25V vs. 0.15V) and quiescent current (150 µA vs. 120 µA). These differences are acceptable for most applications but should be verified against your specific power budget and thermal requirements.

Q: What is the difference between MIC5256-2.85YD5-TR and MIC5256-2.85YM5-TR?

A: Both parts are electrically identical. The primary difference is package format: MIC5256-2.85YD5-TR uses TSOT-23-5 (thin SOT-23-5), while MIC5256-2.85YM5-TR uses standard SOT-23-5. Select the TSOT-23-5 variant if space constraints require a thinner package profile.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory continuity with the original LP3988IMF-2.85/NOPB.

Q: Which substitute part offers the best inventory availability?

A: LP3988IMFX-2.85/NOPB offers the highest inventory availability at 6615 units in stock, followed by MIC5256-2.85YM5-TR at 910 units and LP3988QMFX-2P85 at 2350 units.

Q: Can I use these substitutes in existing PCB designs without layout modifications?

A: Yes. All substitute parts use SOT-23-5 or TSOT-23-5 packages with identical pinout and footprint compatibility. No PCB layout changes are required for electrical substitution. TSOT-23-5 variants (MIC5256-2.85YD5-TR) have reduced package height but maintain footprint compatibility.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message