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MP1540DJ-LF-Z Equivalent & Substitute Parts
Part Overview
The MP1540DJ-LF-Z is a boost switching regulator IC from Monolithic Power Systems designed for step-up voltage conversion applications. This component provides positive adjustable output voltage ranging from 3V to 18V with a maximum output current of 200mA, operating from a 2.5V to 6V input supply. The device is housed in a SOT-23-5 thin package suitable for space-constrained surface mount applications.
The MP1540DJ-LF-Z is currently listed as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this regulator.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Function | Step-Up (Boost) |
| Output Configuration | Positive |
| Output Type | Adjustable |
| Number of Outputs | 1 |
| Voltage - Input (Min) | 2.5V |
| Voltage - Input (Max) | 6V |
| Voltage - Output (Min/Fixed) | 3V |
| Voltage - Output (Max) | 18V |
| Current - Output | 200mA |
| Frequency - Switching | 1.3MHz |
| Synchronous Rectifier | No |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Package / Case | SOT-23-5 Thin, TSOT-23-5 |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitute parts for the MP1540DJ-LF-Z are identified based on strict electrical and mechanical parameter matching. The primary substitution criteria are:
- Identical boost converter topology with positive adjustable output configuration
- Matching input voltage range (2.5V to 6V minimum and maximum)
- Matching output voltage range (3V minimum to 18V maximum)
- Identical output current rating (200mA)
- Identical switching frequency (1.3MHz)
- Identical package type (SOT-23-5 Thin, TSOT-23-5)
- Identical operating temperature range (-40°C to 85°C)
- Compliance with ROHS3 and REACH requirements
The MP1540DJ-LF-P meets all these criteria and is classified as a direct manufacturer substitute. The difference between these part numbers relates to packaging format and product status rather than electrical specifications.
Parameter Comparison
| Parameter | MP1540DJ-LF-Z | MP1540DJ-LF-P |
|---|---|---|
| Manufacturer | Monolithic Power Systems | Monolithic Power Systems Inc. |
| Function | Step-Up | Step-Up |
| Output Configuration | Positive | Positive |
| Topology | Boost | Boost |
| Output Type | Adjustable | Adjustable |
| Number of Outputs | 1 | 1 |
| Voltage - Input (Min) | 2.5V | 2.5V |
| Voltage - Input (Max) | 6V | 6V |
| Voltage - Output (Min/Fixed) | 3V | 3V |
| Voltage - Output (Max) | 18V | 18V |
| Current - Output | 200mA | 200mA |
| Frequency - Switching | 1.3MHz | 1.3MHz |
| Synchronous Rectifier | No | No |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Package / Case | SOT-23-5 Thin, TSOT-23-5 | SOT-23-5 Thin, TSOT-23-5 |
| Mounting Type | Surface Mount | Surface Mount |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) |
| Product Status | Obsolete | Active |
| Packaging Format | Cut Tape (CT) & Digi-Reel® | Cut Tape (CT) & Digi-Reel® |
Engineering Selection Recommendations
The MP1540DJ-LF-P is the direct substitute for the MP1540DJ-LF-Z. Both parts share identical electrical specifications, thermal characteristics, and package configurations. The primary distinction is product status: the MP1540DJ-LF-Z is obsolete while the MP1540DJ-LF-P maintains active status with current manufacturing support.
Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for new designs and production continuity. The MP1540DJ-LF-P is the recommended selection for new applications and ongoing production due to its active product status and confirmed availability.
Frequently Asked Questions (FAQ)
Q: Can the MP1540DJ-LF-P be used as a direct replacement for the MP1540DJ-LF-Z?
A: Yes. The MP1540DJ-LF-P is electrically and mechanically identical to the MP1540DJ-LF-Z. All electrical parameters, thermal specifications, and package dimensions are equivalent. The primary difference is product status and supply availability.
Q: What is the difference between the MP1540DJ-LF-Z and MP1540DJ-LF-P part numbers?
A: The difference relates to packaging format designation and product lifecycle status. The MP1540DJ-LF-Z is obsolete, while the MP1540DJ-LF-P is active. Both are supplied in Cut Tape and Digi-Reel formats with identical component specifications.
Q: Are there any PCB layout or schematic modifications required when switching from MP1540DJ-LF-Z to MP1540DJ-LF-P?
A: No modifications are required. Both parts use the identical SOT-23-5 thin package with the same pinout, electrical characteristics, and operating parameters. Existing designs require no changes.
Q: What are the key electrical parameters that define substitution compatibility for this boost regulator?
A: Substitution compatibility is determined by input voltage range (2.5V to 6V), output voltage range (3V to 18V), output current (200mA), switching frequency (1.3MHz), package type (SOT-23-5 Thin), and operating temperature range (-40°C to 85°C).
Q: Is the MP1540DJ-LF-P suitable for applications requiring ROHS3 compliance?
A: Yes. The MP1540DJ-LF-P is ROHS3 compliant and REACH unaffected, meeting regulatory requirements for restricted substance compliance.
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