MP2303DQ-LF-Z Equivalent & Substitute Parts

Part Overview

The MP2303DQ-LF-Z is a buck switching regulator IC manufactured by Monolithic Power Systems Inc., designed for positive adjustable output applications with 3A output current capability. This device operates across a wide input voltage range of 4.75V to 28V and provides adjustable output voltage from 0.8V to 25V. The part is classified as Not For New Designs, indicating it has been superseded in the manufacturer's product roadmap. Finding equivalent or substitute parts is necessary for design continuity, inventory management, and long-term product support when the original part reaches end-of-life status.

Substiute Parts

MP2303DQ-LF-Z

Monolithic Power Systems Inc.In Stock: 16203MP2303DQ-LF-Z Datasheet

Current PartRFQ

TPS54335ADRCT

Texas InstrumentsIn Stock: 3198TPS54335ADRCT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MP2303DQ-LF-Z is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Buck topology with positive adjustable output configuration
• Single output channel
• Output current rating of 3A minimum
• Input voltage range overlap: minimum 4.75V to 28V maximum
• Output voltage adjustability from 0.8V minimum
• Synchronous rectification capability
• Surface mount packaging in 10-pin QFN form factor

Mechanical Compatibility Criteria:

• 10-VFDFN Exposed Pad package footprint
• 3x3mm package dimensions
• Surface mount technology

The TPS54335ADRCT from Texas Instruments meets all substitution criteria. It maintains identical output current (3A), compatible input voltage range (4.5V to 28V), adjustable output voltage starting at 0.8V, synchronous rectification, and equivalent package footprint (10-VSON 3x3mm). The primary differences are the switching frequency range (50kHz to 1.5MHz versus fixed 340kHz) and extended operating temperature range, which represent functional enhancements rather than incompatibilities.

Parameter Comparison

Engineering Selection Recommendations

The TPS54335ADRCT is the qualified substitute for the MP2303DQ-LF-Z based on the following engineering factors:

Product Status Alignment: The MP2303DQ-LF-Z carries a "Not For New Designs" status, indicating manufacturer discontinuation trajectory. The TPS54335ADRCT maintains "Active" product status, ensuring long-term availability and continued manufacturer support.

Compliance & Certification: Both parts maintain ROHS3 compliance and EAR99 ECCN classification, ensuring regulatory consistency. Both are REACH Unaffected, supporting international supply chain requirements.

Electrical Equivalence: The substitute maintains identical 3A output current, 0.8V minimum adjustable output voltage, and 28V maximum input voltage. The TPS54335ADRCT's lower minimum input voltage (4.5V versus 4.75V) and extended maximum output voltage (24V versus 25V) represent minor parameter variations within acceptable engineering tolerance for most applications.

Thermal Performance: The TPS54335ADRCT provides extended operating temperature range (-40°C to 150°C junction temperature versus -40°C to 85°C ambient), offering improved thermal margin in demanding applications.

Packaging & Footprint: Both devices utilize equivalent 10-pin QFN/VSON packages with 3x3mm footprints, ensuring direct PCB layout compatibility without redesign.

Frequently Asked Questions (FAQ)

Q: Can the TPS54335ADRCT be used as a direct replacement for the MP2303DQ-LF-Z without PCB modifications?

A: Yes. Both parts share identical 10-VFDFN Exposed Pad package geometry (3x3mm), enabling direct footprint compatibility. No PCB layout changes are required for mechanical or electrical integration.

Q: What are the key electrical differences between these parts?

A: The primary differences are switching frequency (MP2303DQ-LF-Z fixed at 340kHz versus TPS54335ADRCT programmable 50kHz to 1.5MHz), maximum output voltage (25V versus 24V), and operating temperature range. These differences do not affect substitution suitability for standard buck regulator applications.

Q: Does the TPS54335ADRCT support the same output voltage adjustment range?

A: Yes. Both parts support adjustable output voltage from 0.8V minimum, meeting identical application requirements for low-voltage regulation circuits.

Q: Are there any supply chain or availability considerations?

A: The TPS54335ADRCT maintains Active product status with 3162 units in current inventory, compared to the MP2303DQ-LF-Z's Not For New Designs status. This ensures superior long-term availability and manufacturer support for the substitute part.

Q: What is the impact of the different Moisture Sensitivity Levels (MSL)?

A: The MP2303DQ-LF-Z carries MSL 1 (Unlimited shelf life), while the TPS54335ADRCT carries MSL 2 (1-year shelf life). This requires standard moisture control procedures for the substitute part during storage and handling, consistent with industry practice for MSL 2 components.

Q: Can the switching frequency difference affect circuit performance?

A: The MP2303DQ-LF-Z operates at fixed 340kHz, while the TPS54335ADRCT supports 50kHz to 1.5MHz. The substitute's programmable frequency range provides design flexibility. For applications requiring fixed 340kHz operation, external frequency-setting components can configure the TPS54335ADRCT to this frequency.