MPQ20051DQ-LF-P Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The MPQ20051DQ-LF-P is an active linear voltage regulator IC from Monolithic Power Systems Inc., classified as a Power Management (PMIC) component. This positive adjustable regulator delivers 1A output current in an 8-QFN (3x3) surface mount package and is designed for applications requiring precision voltage regulation with integrated protection features. The part is currently in active production status with 1042 units in stock. Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and regulatory compliance can be maintained across different packaging formats or automotive-grade variants.

Key Parameters

Parameter	Value
Manufacturer	Monolithic Power Systems Inc.
Category	Power Management (PMIC)
Output Configuration	Positive Adjustable
Number of Regulators	1
Voltage - Input (Max)	5.5V
Voltage - Output (Min/Fixed)	0.8V
Voltage - Output (Max)	5V
Voltage Dropout (Max)	0.28V @ 1A
Current - Output	1A
Operating Temperature	-40°C ~ 125°C
Package / Case	8-VDFN Exposed Pad
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the MPQ20051DQ-LF-P is determined by strict equivalence in the following electrical and mechanical parameters:

Output voltage range (0.8V to 5V adjustable)
Maximum output current (1A)
Input voltage rating (5.5V maximum)
Dropout voltage specification (0.28V @ 1A)
Package type (8-VDFN Exposed Pad, 8-QFN 3x3)
Surface mount compatibility
Operating temperature range (-40°C to 125°C)
Protection features (Over Current, Over Temperature, UVLO)
RoHS3 compliance and MSL rating

Substitute parts are grouped into two categories: standard industrial-grade variants and automotive-grade variants with AEC-Q100 qualification. Packaging format differences (Tape & Reel versus Cut Tape & Digi-Reel) do not affect electrical equivalence but impact procurement and handling requirements.

Parameter Comparison

Part Number	Manufacturer	Packaging	Iq (µA)	Inventory (Pcs)	Grade	Qualification	Product Status
MPQ20051DQ-LF-P	Monolithic Power Systems Inc.	Tape & Reel (TR)	200	1042	Industrial	Standard	Active
MP20051DQ-LF-P	Monolithic Power Systems Inc.	Tape & Reel (TR)	600	2302	Industrial	Standard	Active
MP20051DQ-LF-Z	Monolithic Power Systems Inc.	Cut Tape (CT) & Digi-Reel®	600	25400	Industrial	Standard	Active
MPQ20051DQ-AEC1-LF-P	Monolithic Power Systems Inc.	Tape & Reel (TR)	200	1566	Automotive	AEC-Q100	Active
MPQ20051DQ-AEC1-LF-Z	Monolithic Power Systems Inc.	Cut Tape (CT) & Digi-Reel®	200	55300	Automotive	AEC-Q100	Active

Engineering Selection Recommendations

All listed substitute parts maintain active production status and full RoHS3 compliance. Selection between industrial-grade and automotive-grade variants depends on application requirements. Automotive-grade parts (MPQ20051DQ-AEC1-LF-P and MPQ20051DQ-AEC1-LF-Z) carry AEC-Q100 qualification and are suitable for automotive and high-reliability applications. Industrial-grade parts (MP20051DQ-LF-P and MP20051DQ-LF-Z) are appropriate for standard commercial applications.

Quiescent current differences exist between part variants: the MPQ20051DQ series exhibits 200 µA Iq, while the MP20051DQ series exhibits 600 µA Iq. This parameter difference does not affect substitution eligibility but should be considered for power-sensitive applications.

Packaging format selection (Tape & Reel versus Cut Tape & Digi-Reel) is determined by procurement and assembly requirements. Cut Tape & Digi-Reel packaging (MP20051DQ-LF-Z and MPQ20051DQ-AEC1-LF-Z variants) offers higher inventory availability.

Frequently Asked Questions (FAQ)

Q: Can MP20051DQ-LF-P be used as a direct replacement for MPQ20051DQ-LF-P?

A: Yes, MP20051DQ-LF-P is electrically equivalent. Both parts share identical voltage ratings, output current, dropout voltage, and package specifications. The primary difference is quiescent current (600 µA versus 200 µA), which does not prevent substitution but should be evaluated for power budget impact.

Q: What is the difference between Tape & Reel and Cut Tape & Digi-Reel packaging?

A: Tape & Reel (TR) packaging is supplied on continuous tape for automated assembly lines. Cut Tape (CT) & Digi-Reel® packaging provides individual tape segments and is suitable for lower-volume or mixed-component orders. Both formats contain identical components; the difference is in delivery and handling format only.

Q: Are automotive-grade variants (AEC-Q100) compatible with industrial applications?

A: Yes. Automotive-grade parts with AEC-Q100 qualification exceed industrial-grade requirements and are fully compatible with industrial applications. They may be used as upgrades for enhanced reliability.

Q: Can industrial-grade parts be used in automotive applications?

A: Industrial-grade parts do not carry AEC-Q100 qualification and are not recommended for automotive applications where this certification is required by design or regulatory standards.

Q: Does the 8-QFN (3x3) package remain consistent across all substitute parts?

A: Yes. All listed substitute parts use the 8-VDFN Exposed Pad package in 8-QFN (3x3) form factor, ensuring mechanical and thermal compatibility.

Q: What protection features are included in all substitute parts?

A: All substitute parts include Over Current protection, Over Temperature protection, and Under Voltage Lockout (UVLO) functionality.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message