NCP459FCT2G Equivalent & Substitute Parts

Part Overview

The NCP459FCT2G is a Power Management Integrated Circuit (PMIC) functioning as a power switch/driver with 1:1 N-Channel configuration, rated for 4.5A maximum output current. This component is classified as Obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design support and procurement continuity. The part operates across a load voltage range of 0.75V to 5.5V with typical on-resistance of 11mOhm and includes load discharge functionality.

Substiute Parts

NCP459FCT2G

onsemiIn Stock: 1393NCP459FCT2G Datasheet

Current PartRFQ

NCP451AFCT2G

onsemiIn Stock: 71230NCP451AFCT2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the NCP459FCT2G is determined by the following critical parameters:

• Functional Configuration: 1:1 ratio, High Side, N-Channel output with General Purpose switch type
• Electrical Performance: Load voltage range 0.75V ~ 5.5V, Non-Inverting input interface, Load Discharge feature
• Current Rating: Maximum output current capability
• Thermal Characteristics: Operating temperature range -40°C ~ 85°C
• Physical Form Factor: Surface Mount technology with WLCSP packaging
• Compliance: ROHS3 compliance and MSL rating

The NCP451AFCT2G qualifies as a substitute based on matching functional configuration, electrical operating parameters, thermal range, surface mount technology, and compliance certifications. Differences in current rating and on-resistance represent trade-offs within the General Purpose power switch category.

Parameter Comparison

Engineering Selection Recommendations

The NCP451AFCT2G is the manufacturer-recommended substitute for the obsolete NCP459FCT2G. Both components maintain ROHS3 compliance and MSL Level 1 rating, ensuring equivalent environmental and regulatory standing. The substitute part carries Active product status, providing long-term availability and supply chain stability compared to the Obsolete main part.

Design considerations for substitution include current capacity reduction from 4.5A to 3A and package footprint change from 8-WLCSP to 6-WLCSP. The NCP451AFCT2G introduces Slew Rate Controlled functionality as an additional feature. Applications requiring the full 4.5A output current of the original part require evaluation of alternative solutions outside this substitute relationship.

Frequently Asked Questions (FAQ)

Q: Can NCP451AFCT2G directly replace NCP459FCT2G in existing designs?

A: Direct replacement requires verification that application current requirements do not exceed 3A maximum output. Both parts share identical load voltage range (0.75V ~ 5.5V), operating temperature range (-40°C ~ 85°C), and output configuration (High Side N-Channel 1:1). Package footprint differs: NCP459FCT2G uses 8-WLCSP while NCP451AFCT2G uses 6-WLCSP, necessitating PCB layout modification.

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

A: Maximum output current differs: NCP459FCT2G rated at 4.5A versus NCP451AFCT2G at 3A. On-resistance specifications are comparable (11mOhm typical versus 12mOhm typical). The NCP451AFCT2G includes Slew Rate Controlled feature not present in the main part. Both maintain identical load voltage operating range and thermal specifications.

Q: Are there compliance or certification differences?

A: Both parts maintain identical compliance status: ROHS3 compliant, MSL Level 1 (Unlimited), REACH Unaffected, and ECCN EAR99 classification. No regulatory or environmental differences exist between the two components.

Q: What packaging considerations apply to substitution?

A: The NCP459FCT2G uses 8-WFBGA WLCSP packaging while the NCP451AFCT2G uses 6-UFBGA WLCSP packaging. Both employ surface mount technology and wafer-level chip-scale packaging. PCB layout redesign is required due to different package dimensions and pin configurations.