LX7175CLD-TR Equivalent & Substitute Parts

Part Overview

The LX7175CLD-TR is a buck switching regulator IC manufactured by Microchip Technology, classified as a Power Management (PMIC) component. This device functions as a step-down converter with positive adjustable output, delivering 3.5A maximum output current across a single output channel. The part is currently listed as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design requirements and production continuity.

Substiute Parts

LX7175CLD-TR

Microchip TechnologyIn Stock: 1967LX7175CLD-TR Datasheet

Current PartRFQ

LX7165-01CSP-TR

Microchip TechnologyIn Stock: 3877LX7165-01CSP-TR Datasheet

SimilarRFQ

LX7167ACLD-TR

Microchip TechnologyIn Stock: 3250LX7167ACLD-TR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LX7175CLD-TR is determined by alignment across the following critical parameters:

Topology & Function: All substitute parts must operate as buck (step-down) switching regulators with positive output configuration and single output channel.

Input Voltage Range: Substitute parts must accept the same input voltage window of 3V to 5.5V to ensure compatibility with source power supplies.

Output Voltage Range: Substitute parts must support adjustable output voltage capability within or overlapping the 0.8V to 3.3V range of the main part.

Output Current Capacity: Substitute parts must deliver sufficient current output to meet or exceed the 3.5A requirement of the original design.

Synchronous Rectification: All substitute parts include integrated synchronous rectifier functionality, maintaining efficiency characteristics of the original design.

Mounting & Package: Substitute parts utilize surface mount technology with exposed pad packages suitable for thermal management in compact form factors.

Regulatory Compliance: All parts maintain REACH Unaffected status and EAR99 ECCN classification, ensuring consistent regulatory treatment.

The LX7165-01CSP-TR and LX7167ACLD-TR are identified as equivalent substitutes based on these parameters, though with specific trade-offs in current capacity, package form factor, and output voltage range.

Parameter Comparison

Engineering Selection Recommendations

LX7165-01CSP-TR Selection Criteria:

The LX7165-01CSP-TR is an active product with higher output current capacity (5A versus 3.5A), providing design margin for applications requiring maximum current delivery. This part operates at 1.875MHz switching frequency and features programmable output voltage configuration. The 20-WLCSP package offers superior thermal characteristics compared to the 10-DFN package of the main part. Operating temperature range is 0°C to 85°C, which is narrower than the main part's -10°C to 85°C range. This substitute is suitable for designs where higher current capacity and improved thermal management are prioritized, and where the narrower operating temperature range is acceptable.

LX7167ACLD-TR Selection Criteria:

The LX7167ACLD-TR is an active product with adjustable output voltage configuration matching the main part's flexibility. This part operates at 3MHz switching frequency and features an 8-WFDFN package with smaller footprint (2x2 versus 3x3). Output current capacity is 2.4A, which is lower than the main part's 3.5A specification. The maximum output voltage extends to 5V, providing broader output voltage range capability. Operating temperature range matches the main part at -10°C to 85°C. This substitute is suitable for designs where compact package size and extended output voltage range are required, provided that the 2.4A current limit is sufficient for the application.

Both substitute parts maintain active product status, ensuring long-term availability and supply chain continuity. Both comply with REACH regulations and carry EAR99 ECCN classification, matching the regulatory profile of the obsolete main part.

Frequently Asked Questions (FAQ)

Q: Can the LX7165-01CSP-TR directly replace the LX7175CLD-TR in existing designs?

A: The LX7165-01CSP-TR shares the same input voltage range (3V to 5.5V), output voltage range (0.6V to 3.3V), and synchronous rectifier architecture. However, the package changes from 10-DFN (3x3) to 20-WLCSP, requiring PCB layout modifications. The output type changes from adjustable to programmable (fixed), which may require design changes if voltage adjustment capability is essential. The higher current capacity (5A) provides design margin. Thermal characteristics improve due to the larger package footprint.

Q: Can the LX7167ACLD-TR directly replace the LX7175CLD-TR in existing designs?

A: The LX7167ACLD-TR shares adjustable output voltage configuration, input voltage range (3V to 5.5V), and operating temperature range (-10°C to 85°C) with the main part. The package changes from 10-DFN (3x3) to 8-DFN (2x2), reducing footprint but potentially affecting thermal performance. The output current capacity is lower at 2.4A versus 3.5A, which may be limiting for high-current applications. The maximum output voltage extends to 5V, providing additional flexibility. PCB layout modifications are required due to package change.

Q: What are the key differences in output voltage capability between these parts?

A: The LX7175CLD-TR provides adjustable output from 0.8V to 3.3V. The LX7165-01CSP-TR provides programmable output at 0.6V or 0.9V fixed, with maximum 3.3V. The LX7167ACLD-TR provides adjustable output from 0.6V to 5V, offering the broadest range. Selection depends on whether fixed or adjustable output is required and the specific voltage levels needed by the application.

Q: How do switching frequencies differ among these parts?

A: The LX7175CLD-TR operates at 1.4MHz. The LX7165-01CSP-TR operates at 1.875MHz. The LX7167ACLD-TR operates at 3MHz. Higher switching frequencies reduce output filter component size but increase switching losses. The choice depends on application requirements for EMI performance, component size, and efficiency.

Q: What are the package implications for PCB design?

A: The LX7175CLD-TR uses 10-DFN (3x3) package. The LX7165-01CSP-TR uses 20-WLCSP, which is a larger package with more pins and improved thermal characteristics. The LX7167ACLD-TR uses 8-DFN (2x2), which is the smallest package with reduced footprint. Package selection affects PCB layout, thermal management strategy, and component placement density. All packages include exposed pads for thermal dissipation.

Q: Are there operating temperature range considerations for substitution?

A: The LX7175CLD-TR and LX7167ACLD-TR both operate from -10°C to 85°C. The LX7165-01CSP-TR operates from 0°C to 85°C, with a narrower lower temperature limit. Applications requiring operation below 0°C must use either the main part or the LX7167ACLD-TR. Applications operating only above 0°C can use any of the three parts.

Q: Do all substitute parts maintain the same regulatory compliance?

A: All parts, including the main part and both substitutes, maintain REACH Unaffected status and EAR99 ECCN classification. All parts have Moisture Sensitivity Level 1 (Unlimited). Regulatory treatment is consistent across all three parts, with no additional compliance considerations required for substitution.

Q: What is the current capacity trade-off between substitutes?

A: The LX7165-01CSP-TR provides 5A output current, exceeding the main part's 3.5A by 43%. The LX7167ACLD-TR provides 2.4A output current, which is 31% lower than the main part. Applications requiring the full 3.5A capacity must use either the main part or the LX7165-01CSP-TR. Applications with lower current requirements can use the LX7167ACLD-TR, which offers a smaller package footprint.