MP20043DGT-B-LF-Z Equivalent & Substitute Parts

Part Overview

The MP20043DGT-B-LF-Z is a linear voltage regulator IC from Monolithic Power Systems designed for positive programmable output applications. This dual-output PMIC delivers 300mA per channel in an 8-TQFN (2x2) surface mount package. The part is classified as "Not For New Designs," indicating end-of-life status. Identifying equivalent substitute parts is necessary for ongoing production support, legacy system maintenance, and design continuity where this regulator is currently deployed.

Key Parameters

Parameter	Value
Manufacturer Part Number	MP20043DGT-B-LF-Z
Manufacturer	Monolithic Power Systems
Category	Power Management (PMIC)
Package / Case	8-VFDFN Exposed Pad
Supplier Device Package	8-TQFN (2x2)
Output Configuration	Positive
Number of Regulators	2
Current - Output	300mA, 300mA
Voltage - Input (Max)	5.5V
Voltage - Output (Min/Fixed)	1.2V, 1.8V
Voltage - Output (Max)	3.3V, 3.3V
Voltage Dropout (Max)	0.28V @ 300mA
Operating Temperature	-40°C ~ 125°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the MP20043DGT-B-LF-Z is determined by the following critical parameters:

Physical package compatibility: 8-TQFN (2x2) form factor with 8-VFDFN exposed pad configuration
Dual-output architecture: Two independent 300mA regulators
Output configuration: Positive polarity
Input voltage tolerance: Maximum 5.5V or higher
Output voltage range: Coverage of 1.2V to 3.3V across both channels
Dropout voltage performance: 0.28V or lower at 300mA
Surface mount mounting type
Operating temperature range: -40°C to 125°C minimum
RoHS3 compliance and MSL Level 1 rating

The MP20043DGT-B-LF-Z features programmable output voltages. Substitute parts identified are fixed-output variants from the same manufacturer base product family (MP20041 series), which maintain electrical and mechanical compatibility while offering alternative fixed voltage configurations.

Parameter Comparison

Parameter	MP20043DGT-B-LF-Z (Main)	MP20041DGT-GJ-LF-P	MP20041DGT-MS-LF-Z
Manufacturer	Monolithic Power Systems	Monolithic Power Systems Inc.	Monolithic Power Systems Inc.
Package / Case	8-VFDFN Exposed Pad	8-VFDFN Exposed Pad	8-VFDFN Exposed Pad
Supplier Device Package	8-TQFN (2x2)	8-TQFN (2x2)	8-TQFN (2x2)
Output Configuration	Positive	Positive	Positive
Number of Regulators	2	2	2
Current - Output	300mA, 300mA	300mA, 300mA	300mA, 300mA
Voltage - Input (Max)	5.5V	6V	6V
Voltage - Output (Min/Fixed)	1.2V, 1.8V	1.8V, 2.5V	2.8V, 3.3V
Voltage Dropout (Max)	0.28V @ 300mA	0.22V @ 300mA (Typ)	0.22V @ 300mA (Typ)
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Control Features	Enable	Enable	Enable
Protection Features	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature	Over Current, Over Temperature
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Not For New Designs	Active	Active

Engineering Selection Recommendations

The MP20043DGT-B-LF-Z is end-of-life and not recommended for new designs. Both substitute parts—MP20041DGT-GJ-LF-P and MP20041DGT-MS-LF-Z—carry Active product status and are suitable for ongoing production and new applications.

Selection between the two substitutes depends on required output voltage levels:

MP20041DGT-GJ-LF-P provides fixed outputs of 1.8V and 2.5V, suitable for applications requiring lower voltage rails
MP20041DGT-MS-LF-Z provides fixed outputs of 2.8V and 3.3V, suitable for standard logic and I/O supply applications

Both substitutes offer improved dropout voltage performance (0.22V typical versus 0.28V maximum on the main part) and maintain full RoHS3 compliance and MSL Level 1 rating. The trade-off is the transition from programmable to fixed output configuration; applications requiring voltage programmability must retain the MP20043DGT-B-LF-Z or implement external voltage selection circuitry.

Frequently Asked Questions (FAQ)

Q: Can MP20041DGT-GJ-LF-P or MP20041DGT-MS-LF-Z be used as direct pin-for-pin replacements?

A: Yes. Both substitute parts share identical 8-TQFN (2x2) package geometry and pinout compatibility. PCB layout modifications are not required for physical substitution.

Q: What is the primary difference between the main part and the substitutes?

A: The MP20043DGT-B-LF-Z features programmable output voltages across a 1.2V to 3.3V range. The MP20041 series substitutes provide fixed output voltage pairs. Applications must verify that the fixed voltage outputs of the selected substitute match system requirements.

Q: Which substitute should be selected for a design requiring 1.8V and 2.5V outputs?

A: MP20041DGT-GJ-LF-P is the appropriate choice, as it provides these exact fixed output voltages.

Q: Which substitute should be selected for a design requiring 2.8V and 3.3V outputs?

A: MP20041DGT-MS-LF-Z is the appropriate choice, as it provides these exact fixed output voltages.

Q: Are there compliance or regulatory differences between the main part and substitutes?

A: No. All three parts are ROHS3 compliant, carry MSL Level 1 rating, and share identical REACH and ECCN classifications.

Q: What is the inventory status of the substitute parts?

A: MP20041DGT-GJ-LF-P has 2700 pieces in stock. MP20041DGT-MS-LF-Z has 5400 pieces in stock. Both are available as new original components.

Q: Can the MP20043DGT-B-LF-Z be used indefinitely in production?

A: The part is classified as "Not For New Designs," indicating limited long-term availability. Transition to an active substitute part is recommended for designs entering production or requiring extended supply assurance.

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