MP8903DJ-2.5-LF-Z Equivalent & Substitute Parts

Part Overview

The MP8903DJ-2.5-LF-Z is a linear voltage regulator IC from Monolithic Power Systems Inc., classified as a Power Management (PMIC) component. This device functions as a positive adjustable (fixed) output regulator with 150mA output current capability in a TSOT-23-5 surface mount package. The part is designated as "Not For New Designs," indicating it has reached end-of-life status. Finding equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support existing production requirements.

Key Parameters

Parameter	Value
Manufacturer	Monolithic Power Systems Inc.
Category	Power Management (PMIC)
Output Configuration	Positive
Output Type	Adjustable (Fixed)
Number of Regulators	1
Voltage - Input (Max)	6.5V
Voltage - Output (Min/Fixed)	1.25V (2.5V)
Voltage - Output (Max)	5V
Voltage Dropout (Max)	0.125V @ 150mA
Current - Output	150mA
Operating Temperature	-40°C ~ 85°C
Package / Case	SOT-23-5 Thin, TSOT-23-5
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the MP8903DJ-2.5-LF-Z are identified based on strict electrical and mechanical parameter matching within the allowed specifications for linear voltage regulators. The substitution criteria are:

Identical output configuration (Positive)
Identical output type (Adjustable/Fixed)
Identical number of regulators (1)
Matching voltage specifications: Input (Max) 6.5V, Output (Min/Fixed) 1.25V (2.5V), Output (Max) 5V
Matching current output rating (150mA)
Identical operating temperature range (-40°C ~ 85°C)
Identical package type (SOT-23-5 Thin, TSOT-23-5)
Identical mounting type (Surface Mount)
Matching RoHS compliance status (ROHS3 Compliant)

The MP8801DJ-2.5-LF-P and MP8801DJ-2.5-LF-Z meet all these criteria and are classified as parametric equivalents. The primary difference between these substitutes is packaging format: MP8801DJ-2.5-LF-P is supplied in Tape & Reel (TR) format, while MP8801DJ-2.5-LF-Z is supplied in Cut Tape (CT) & Digi-Reel® format.

Parameter Comparison

Parameter	MP8903DJ-2.5-LF-Z (Main)	MP8801DJ-2.5-LF-P (Substitute)	MP8801DJ-2.5-LF-Z (Substitute)
Manufacturer	Monolithic Power Systems Inc.	Monolithic Power Systems Inc.	Monolithic Power Systems Inc.
Product Status	Not For New Designs	Active	Active
Output Configuration	Positive	Positive	Positive
Output Type	Adjustable (Fixed)	Adjustable (Fixed)	Adjustable (Fixed)
Number of Regulators	1	1	1
Voltage - Input (Max)	6.5V	6.5V	6.5V
Voltage - Output (Min/Fixed)	1.25V (2.5V)	1.25V (2.5V)	1.25V (2.5V)
Voltage - Output (Max)	5V	5V	5V
Voltage Dropout (Max)	0.125V @ 150mA	0.125V @ 150mA (Typ)	0.125V @ 150mA (Typ)
Current - Output	150mA	150mA	150mA
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	SOT-23-5 Thin, TSOT-23-5	SOT-23-5 Thin, TSOT-23-5	SOT-23-5 Thin, TSOT-23-5
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Packaging Format	Tape & Reel (TR)	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Both MP8801DJ-2.5-LF-P and MP8801DJ-2.5-LF-Z are direct substitutes for the MP8903DJ-2.5-LF-Z. The MP8801 series parts carry "Active" product status, ensuring ongoing manufacturer support and supply availability, in contrast to the "Not For New Designs" status of the MP8903DJ-2.5-LF-Z.

Selection between the two MP8801 variants depends on packaging requirements:

MP8801DJ-2.5-LF-P: Use when Tape & Reel (TR) packaging is required for automated assembly processes.
MP8801DJ-2.5-LF-Z: Use when Cut Tape (CT) & Digi-Reel® packaging is acceptable or preferred for lower-volume applications or mixed component sourcing.

Both substitutes maintain identical electrical specifications, thermal performance, and regulatory compliance (ROHS3 Compliant, REACH Unaffected, EAR99 classification). The MP8801 variants demonstrate improved PSRR performance (70dB ~ 30dB at 1kHz ~ 1MHz) compared to the main part (50dB ~ 20dB), and include specified quiescent current (150 µA), providing enhanced performance characteristics for power management applications.

Frequently Asked Questions (FAQ)

Q: Can MP8801DJ-2.5-LF-P and MP8801DJ-2.5-LF-Z be used interchangeably with MP8903DJ-2.5-LF-Z?

A: Yes. Both MP8801 variants are parametric equivalents with identical electrical specifications, voltage ratings, current output, operating temperature range, and package type (SOT-23-5). The only difference is packaging format (Tape & Reel vs. Cut Tape & Digi-Reel®).

Q: What is the difference between MP8801DJ-2.5-LF-P and MP8801DJ-2.5-LF-Z?

A: The electrical and functional specifications are identical. The difference is in packaging format: MP8801DJ-2.5-LF-P uses Tape & Reel (TR) packaging, while MP8801DJ-2.5-LF-Z uses Cut Tape (CT) & Digi-Reel® packaging. Selection depends on assembly equipment compatibility and procurement volume requirements.

Q: Why is the MP8903DJ-2.5-LF-Z marked "Not For New Designs"?

A: This designation indicates the part has reached end-of-life status. Monolithic Power Systems Inc. recommends using the MP8801 series for new designs. Existing inventory of MP8903DJ-2.5-LF-Z remains available for legacy system support.

Q: Are the substitute parts ROHS3 compliant?

A: Yes. Both MP8801DJ-2.5-LF-P and MP8801DJ-2.5-LF-Z are ROHS3 Compliant with Moisture Sensitivity Level (MSL) 1 (Unlimited), matching the compliance profile of the main part.

Q: What are the key parameters that determine substitutability?

A: Substitutability is determined by matching: output configuration (Positive), output type (Adjustable/Fixed), number of regulators (1), voltage specifications (Input Max 6.5V, Output Min/Fixed 1.25V/2.5V, Output Max 5V), current output (150mA), operating temperature range (-40°C ~ 85°C), package type (SOT-23-5), and mounting type (Surface Mount).

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