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

Part Overview

The MPQ20051DQ-LF-Z 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. The device is currently in active production status with 10,100 units in stock. Substitute parts are necessary to accommodate different packaging formats (Tape & Reel versus Cut Tape), automotive-grade qualifications (AEC-Q100), and varying quiescent current specifications across the product family.

Substiute Parts

MPQ20051DQ-LF-Z

Monolithic Power Systems Inc.In Stock: 10113MPQ20051DQ-LF-Z Datasheet

Current PartRFQ

MP20051DQ-LF-P

Monolithic Power Systems Inc.In Stock: 2395MP20051DQ-LF-P Datasheet

Parametric EquivalentRFQ

MP20051DQ-LF-Z

Monolithic Power Systems Inc.In Stock: 25436MP20051DQ-LF-Z Datasheet

Parametric EquivalentRFQ

MPQ20051DQ-AEC1-LF-P

Monolithic Power Systems Inc.In Stock: 1656MPQ20051DQ-AEC1-LF-P Datasheet

Parametric EquivalentRFQ

MPQ20051DQ-AEC1-LF-Z

Monolithic Power Systems Inc.In Stock: 55386MPQ20051DQ-AEC1-LF-Z Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution within this product family is determined by the following allowed parameters:

Base Product Designation: All substitute parts share the same base product number (MPQ20051 or MP20051), indicating identical core functionality and electrical performance.

Packaging Format: Substitutes differ in distribution packaging—Cut Tape (CT) & Digi-Reel® versus Tape & Reel (TR)—without affecting component performance or pinout.

Quiescent Current Specification: Two distinct Iq values exist within the family: 200 µA (MPQ20051 series) and 600 µA (MP20051 series). These represent different internal design variants but maintain identical output specifications and protection features.

Automotive Qualification: The AEC-Q100 designation identifies automotive-grade variants (MPQ20051DQ-AEC1-LF-Z and MPQ20051DQ-AEC1-LF-P) suitable for automotive applications, while non-AEC variants serve general industrial applications.

Compliance & Certifications: All variants maintain ROHS3 compliance, MSL 1 rating, and identical electrical protection features, ensuring functional interchangeability within the specified parameter constraints.

Parameter Comparison

Engineering Selection Recommendations

For General Industrial Applications: Select MPQ20051DQ-LF-Z (primary part) or MP20051DQ-LF-Z based on packaging requirements and inventory availability. Both maintain identical electrical specifications and ROHS3 compliance. The choice between these variants depends solely on distribution packaging format and quiescent current tolerance in the application circuit.

For Automotive Applications: Select MPQ20051DQ-AEC1-LF-Z or MPQ20051DQ-AEC1-LF-P. These variants carry AEC-Q100 qualification, meeting automotive industry reliability and qualification standards. MPQ20051DQ-AEC1-LF-Z offers superior inventory availability (55,300 units) compared to the Tape & Reel variant.

For Tape & Reel Packaging Requirements: MP20051DQ-LF-P and MPQ20051DQ-AEC1-LF-P are available in Tape & Reel format. Selection between these depends on automotive qualification necessity and quiescent current specification tolerance.

Compliance Verification: All listed substitutes maintain ROHS3 compliance, MSL 1 rating, and identical protection features (Over Current, Over Temperature, UVLO). No additional qualification testing is required when substituting between variants within this family.

Frequently Asked Questions (FAQ)

Q: Can I substitute MPQ20051DQ-LF-Z with MP20051DQ-LF-Z?

A: Yes. Both parts deliver identical output current (1A), input voltage range (5.5V max), dropout voltage (0.28V @ 1A), and protection features. The primary difference is quiescent current: MPQ20051DQ-LF-Z specifies 200 µA while MP20051DQ-LF-Z specifies 600 µA. Substitution is valid if your application tolerates the higher quiescent current specification.

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

A: These are distribution packaging formats only. Cut Tape & Digi-Reel® provides individual component strips suitable for manual or semi-automated assembly. Tape & Reel provides continuous reel format for high-volume automated pick-and-place assembly. The component itself and its electrical performance remain identical.

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

A: Yes. Automotive-grade parts exceed industrial reliability requirements and maintain all specified electrical parameters. Using AEC-Q100 qualified parts in industrial applications introduces no compatibility issues and may provide enhanced reliability margin.

Q: Can I use MP20051DQ-LF-P (600 µA Iq) as a direct replacement for MPQ20051DQ-LF-Z (200 µA Iq)?

A: Electrical substitution is valid if your circuit design accommodates the higher quiescent current. The 400 µA difference affects standby power consumption and thermal performance. Verify that your power budget and thermal design account for this specification change before implementation.

Q: Do all variants maintain the same protection features?

A: Yes. All listed substitutes include identical protection: Over Current, Over Temperature, and Under Voltage Lockout (UVLO). No functional protection differences exist between variants.

Q: What is the MSL rating and why does it matter?

A: All variants carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity limitations. Components can be stored indefinitely without desiccant packaging or time-to-reflow restrictions, simplifying inventory management and supply chain handling.