LP2985ITP-2.6/NOPB Equivalent & Substitute Parts

Part Overview

The LP2985ITP-2.6/NOPB is a linear voltage regulator IC manufactured by Texas Instruments, designed to deliver a fixed 2.6V output at 150mA. This device is classified as a positive fixed output regulator within the Power Management (PMIC) category. The part is currently listed as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity. The LP2985ITP-2.6/NOPB operates across an industrial temperature range of -40°C to 125°C and includes integrated protection features for over-current, over-temperature, and short-circuit conditions.

Key Parameters

Parameter	Value
Manufacturer Part Number	LP2985ITP-2.6/NOPB
Manufacturer	Texas Instruments
Product Status	Obsolete
Output Voltage (Fixed)	2.6V
Output Current	150mA
Input Voltage (Max)	16V
Voltage Dropout (Max)	0.58V @ 150mA
Quiescent Current (Iq)	95 µA
Package Type	5-DSBGA
Operating Temperature Range	-40°C to 125°C
Protection Features	Over Current, Over Temperature, Short Circuit
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the LP2985ITP-2.6/NOPB is determined by the following critical electrical and mechanical parameters:

Fixed output voltage of 2.6V
Output current capability of 150mA minimum
Maximum input voltage rating of 13.2V or higher
Operating temperature range of -40°C to 125°C
Positive fixed output configuration with single regulator
Enable control feature
Protection against over-current, over-temperature, and short-circuit conditions
Surface mount technology with RoHS3 compliance

The AP2202K-2.6TRE1 from Diodes Incorporated meets all substitution criteria. While the package format differs (SOT-23-5 versus 5-DSBGA), both are surface-mount technologies suitable for modern PCB assembly. The AP2202K-2.6TRE1 maintains electrical compatibility through matching output voltage, output current, operating temperature range, and protection feature set.

Parameter Comparison

Parameter	LP2985ITP-2.6/NOPB (Main)	AP2202K-2.6TRE1 (Substitute)
Manufacturer	Texas Instruments	Diodes Incorporated
Product Status	Obsolete	Active
Output Voltage (Fixed)	2.6V	2.6V
Output Current	150mA	150mA
Input Voltage (Max)	16V	13.2V
Voltage Dropout (Max)	0.58V @ 150mA	0.35V @ 150mA
Quiescent Current (Iq)	95 µA	150 µA
PSRR	45dB (1kHz)	75dB (100Hz)
Operating Temperature Range	-40°C to 125°C	-40°C to 125°C
Package Type	5-DSBGA	SOT-23-5
Protection Features	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Reverse Polarity
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

The AP2202K-2.6TRE1 is the designated manufacturer-recommended substitute for the obsolete LP2985ITP-2.6/NOPB. Selection of this substitute is supported by the following factors:

The substitute maintains active product status with Diodes Incorporated, ensuring long-term availability and supply chain continuity. Both components achieve ROHS3 compliance and carry unlimited moisture sensitivity classification (MSL 1), meeting regulatory and environmental requirements.

Electrical performance of the AP2202K-2.6TRE1 demonstrates improvements in key areas: the dropout voltage is reduced to 0.35V compared to 0.58V, and power supply rejection ratio (PSRR) is enhanced to 75dB. The maximum input voltage specification of 13.2V is lower than the original 16V rating; applications requiring input voltages above 13.2V require design review.

Package transition from 5-DSBGA to SOT-23-5 requires PCB layout modification. The SOT-23-5 package is widely supported by standard assembly processes and offers improved thermal characteristics and ease of handling compared to ball grid array formats.

Frequently Asked Questions (FAQ)

Q: Can the AP2202K-2.6TRE1 directly replace the LP2985ITP-2.6/NOPB without PCB modification?

A: No. The LP2985ITP-2.6/NOPB uses a 5-DSBGA package while the AP2202K-2.6TRE1 uses SOT-23-5. PCB footprint redesign is required. Pin-to-pin functional compatibility exists, but physical layout changes are mandatory.

Q: What is the impact of the reduced maximum input voltage (13.2V vs. 16V)?

A: Applications operating with input voltages between 13.2V and 16V cannot use the AP2202K-2.6TRE1 without circuit redesign. Verify your input voltage specification before substitution.

Q: Are there differences in protection features between these parts?

A: Both provide over-current and over-temperature protection. The AP2202K-2.6TRE1 adds reverse polarity protection, while the LP2985ITP-2.6/NOPB includes short-circuit protection. Evaluate your application's protection requirements.

Q: Does the higher quiescent current of the AP2202K-2.6TRE1 (150 µA vs. 95 µA) affect system design?

A: The 55 µA difference is typically negligible in most applications. For battery-powered or ultra-low-power designs, calculate the impact on standby current consumption.

Q: Is the improved dropout voltage of the AP2202K-2.6TRE1 beneficial?

A: Yes. The 0.35V dropout versus 0.58V allows operation with lower input voltages or reduces heat dissipation at the same input voltage, improving overall system efficiency.

Q: Are both parts RoHS compliant?

A: Yes. Both the LP2985ITP-2.6/NOPB and AP2202K-2.6TRE1 are ROHS3 compliant with unlimited moisture sensitivity (MSL 1).

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