KA7552A Equivalent & Substitute Parts

Part Overview

The KA7552A is a Regulator Positive Output DC-DC Controller IC manufactured by onsemi in an 8-DIP through-hole package. This component functions as a transistor driver for positive output regulation topologies with a single output phase. The KA7552A is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity. Alternative parts must maintain functional equivalence in power management applications while accommodating modern packaging and availability constraints.

Substiute Parts

KA7552A

onsemiIn Stock: 40119KA7552A Datasheet

Current PartRFQ

NCP1252ADR2G

onsemiIn Stock: 160440NCP1252ADR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the KA7552A is determined by the following critical parameters:

• Manufacturer Origin: onsemi maintains design continuity and supply chain reliability
• Functional Category: Power Management (PMIC) classification ensures application compatibility
• Output Configuration: Positive output regulation capability
• Supply Voltage Range: Operating range of 8.7V ~ 30V establishes input compatibility
• Package Compatibility: Through-hole 8-DIP form factor or surface-mount equivalent with functional pin mapping
• Regulatory Compliance: ROHS3 compliance and REACH unaffected status

The NCP1252ADR2G qualifies as a substitute based on shared manufacturer origin (onsemi), identical regulatory compliance (ROHS3, REACH unaffected), compatible supply voltage range (9V ~ 28V overlaps with 8.7V ~ 30V), and equivalent 8-pin package configuration (8-SOIC surface mount). While the NCP1252ADR2G employs a different topology (Flyback, Forward) and mounting method (surface mount), it provides functional equivalence for DC-DC control applications within the specified electrical parameters.

Parameter Comparison

Engineering Selection Recommendations

The NCP1252ADR2G is an active product from onsemi with current manufacturing support and inventory availability (160,400 pcs in stock), addressing the obsolescence status of the KA7552A. Both components maintain ROHS3 compliance and REACH unaffected certification, ensuring regulatory alignment for new designs and production transitions.

The primary design consideration is the transition from through-hole 8-DIP mounting to surface-mount 8-SOIC packaging. This change requires PCB layout modification but provides advantages in board density and automated assembly compatibility. The NCP1252ADR2G operates across a slightly narrower supply voltage range (9V ~ 28V versus 8.7V ~ 30V) and supports an extended operating temperature range (-25°C ~ 125°C junction temperature versus -25°C ~ 85°C ambient), offering improved thermal performance margins in demanding applications.

Frequently Asked Questions (FAQ)

Q: Can the NCP1252ADR2G directly replace the KA7552A without circuit modifications?

A: Pin-to-pin replacement is not possible due to different package types (8-DIP through-hole versus 8-SOIC surface mount). PCB redesign is required. Functional equivalence exists within the specified electrical parameters, but circuit topology and control feature differences may require application-level validation.

Q: What is the impact of the supply voltage range difference (8.7V ~ 30V versus 9V ~ 28V)?

A: The NCP1252ADR2G operates within a narrower range. Applications requiring operation below 9V or above 28V cannot use this substitute. Verify your design's supply voltage requirements against the NCP1252ADR2G specification before selection.

Q: Why is the NCP1252ADR2G classified as a substitute despite different topologies?

A: Both components function as DC-DC controller ICs within the Power Management (PMIC) category from onsemi. The substitute meets the core electrical parameters (supply voltage, pin count, regulatory compliance) that define functional equivalence for this product category. Application-specific topology requirements must be evaluated independently.

Q: Is the extended operating temperature range of the NCP1252ADR2G beneficial?

A: The NCP1252ADR2G supports -25°C ~ 125°C (junction temperature) compared to the KA7552A's -25°C ~ 85°C (ambient temperature). This provides additional thermal margin and may improve reliability in high-temperature environments, though it does not change the minimum operating temperature.

Q: What are the packaging and supply chain implications of switching to the NCP1252ADR2G?

A: The NCP1252ADR2G is available in Cut Tape (CT) and Digi-Reel packaging with 160,400 pcs in current stock, compared to the KA7552A's obsolete status. Surface-mount components integrate with modern automated assembly processes, potentially reducing production costs despite requiring PCB layout changes.