NCP500SQL25T1G Equivalent & Substitute Parts

Part Overview

The NCP500SQL25T1G is a linear voltage regulator IC from onsemi designed for positive fixed output applications. It delivers 150mA at a fixed 2.5V output with a maximum dropout voltage of 0.27V at full load. The device is housed in a 6-VDFN package with exposed pad and includes integrated over-current and over-temperature protection.

This part is classified as obsolete. Identifying suitable substitute components is necessary to maintain design continuity and ensure availability for new production runs or system updates.

Substiute Parts

NCP500SQL25T1G

onsemiIn Stock: 847NCP500SQL25T1G Datasheet

Current PartRFQ

NCP718ASNADJT1G

onsemiIn Stock: 37915NCP718ASNADJT1G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the NCP500SQL25T1G requires evaluation based on the following critical parameters:

Output Voltage Compatibility: The NCP500SQL25T1G provides a fixed 2.5V output. Substitute parts must deliver the same fixed output voltage or provide adjustable output capability that can be configured to 2.5V.

Current Delivery: The original part supplies 150mA maximum output current. Substitute parts must meet or exceed this current rating to ensure adequate power delivery to the load.

Input Voltage Range: The NCP500SQL25T1G accepts input voltages up to 6V. Substitute parts must support this maximum input specification.

Dropout Voltage: The original part exhibits 0.27V dropout at 150mA. Substitute parts with lower dropout voltage provide improved efficiency and thermal performance.

Package Compatibility: The 6-VDFN package is surface-mount. Substitute parts may use different packages if the application circuit board can accommodate the alternative footprint.

Product Status and Compliance: The original part is obsolete. Active substitute parts ensure long-term availability and continued support. Both parts must maintain ROHS3 compliance and equivalent environmental certifications.

Parameter Comparison

Engineering Selection Recommendations

The NCP718ASNADJT1G is an active substitute for the obsolete NCP500SQL25T1G. Both devices are manufactured by onsemi and maintain equivalent environmental compliance certifications (ROHS3, REACH Unaffected, EAR99).

Advantages of the NCP718ASNADJT1G:

• Active product status ensures continued availability and manufacturing support
• Higher output current capability (300mA vs. 150mA) provides design margin
• Extended input voltage range (24V vs. 6V) accommodates broader supply specifications
• Wider operating temperature range (-40°C ~ 125°C vs. -40°C ~ 85°C)
• Adjustable output voltage (1.2V - 5V) allows configuration to 2.5V fixed output

Design Considerations:

• The NCP718ASNADJT1G uses TSOT-23-5 package versus the 6-VDFN package of the original part. Circuit board layout modification is required.
• Dropout voltage is higher (0.49V @ 300mA vs. 0.27V @ 150mA). Verify thermal performance in the target application.
• Quiescent current is higher (8 µA vs. 1 µA). Evaluate impact on battery-powered or ultra-low-power applications.
• The adjustable output requires external resistor network configuration to set 2.5V output. Reference the NCP718 datasheet for resistor selection.

Frequently Asked Questions (FAQ)

Q: Can the NCP718ASNADJT1G directly replace the NCP500SQL25T1G without circuit modifications?

A: No. The NCP718ASNADJT1G uses a different package (TSOT-23-5 vs. 6-VDFN) and requires external resistors to configure the adjustable output to 2.5V. Circuit board layout and schematic changes are necessary.

Q: What output voltage does the NCP718ASNADJT1G deliver if used as a direct pin-for-pin substitute?

A: The NCP718ASNADJT1G is an adjustable regulator. Without external resistor configuration, the output voltage is not defined. Proper resistor network design is required to achieve 2.5V output.

Q: Is the higher dropout voltage of the NCP718ASNADJT1G a concern?

A: The NCP718ASNADJT1G exhibits 0.49V dropout at 300mA compared to 0.27V for the original part. For applications with tight input-to-output voltage margins or high thermal constraints, verify that the increased dropout voltage remains acceptable.

Q: Does the NCP718ASNADJT1G support the same operating temperature range?

A: No. The NCP718ASNADJT1G operates from -40°C to 125°C (junction temperature), while the original part operates from -40°C to 85°C (ambient temperature). The substitute provides a wider temperature range suitable for extended industrial applications.

Q: Are both parts RoHS compliant?

A: Yes. Both the NCP500SQL25T1G and NCP718ASNADJT1G are ROHS3 compliant with MSL rating of 1 (unlimited moisture sensitivity level).

Q: What is the primary reason to substitute the NCP500SQL25T1G?

A: The NCP500SQL25T1G is classified as obsolete. The NCP718ASNADJT1G is an active product with guaranteed long-term availability, manufacturing support, and continued compliance with environmental regulations.