KA723D Linear Voltage Regulator IC Equivalent & Substitute Parts

Part Overview

The KA723D is a linear voltage regulator IC manufactured by onsemi, designed for positive adjustable output applications with 150mA current capability in a 14-SOIC package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The KA723D provides adjustable output voltage regulation from 2V to 37V with integrated current limiting protection, suitable for applications requiring precision voltage regulation in compact surface-mount form factors.

Substiute Parts

KA723D

onsemiIn Stock: 1858KA723D Datasheet

Current PartRFQ

UA723CD

Texas InstrumentsIn Stock: 1931UA723CD Datasheet

DirectRFQ

UA723CDR

Texas InstrumentsIn Stock: 9251UA723CDR Datasheet

DirectRFQ

UA723CNSR

Texas InstrumentsIn Stock: 4463UA723CNSR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the KA723D are qualified based on the following critical parameters that determine functional equivalence:

Electrical Equivalence Criteria:

• Output Configuration: Positive
• Output Type: Adjustable
• Voltage - Input (Max): 40V
• Voltage - Output (Min/Fixed): 2V
• Voltage - Output (Max): 37V
• Current - Output: 150mA
• Control Features: Current Limit
• Operating Temperature: 0°C ~ 70°C

Mechanical Equivalence Criteria:

• Package / Case: 14-SOIC form factor
• Mounting Type: Surface Mount

The substitute parts identified maintain full electrical and mechanical compatibility with the KA723D. Variations in packaging format (Tube, Cut Tape, Tape & Reel) and package width dimensions represent different distribution and assembly options rather than functional differences. The UA723CNSR variant features a 14-SO package with 5.30mm width compared to the standard 3.90mm width, which may require PCB layout verification for pin-to-pin compatibility despite maintaining the same pin count and electrical specifications.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: UA723CD (Texas Instruments)

The UA723CD is the recommended direct substitute for the KA723D. This part maintains identical electrical specifications and the standard 14-SOIC package footprint (3.90mm width). The UA723CD carries Active product status with ROHS3 compliance certification, ensuring long-term availability and regulatory alignment for new designs and production continuity.

Alternative Substitute: UA723CDR (Texas Instruments)

The UA723CDR provides equivalent electrical and mechanical specifications to the KA723D with identical package dimensions. This part is designated Last Time Buy status, indicating limited future availability. The UA723CDR is suitable for immediate replacement applications where existing inventory can be secured, but should not be selected for new long-term production planning.

Package Variant: UA723CNSR (Texas Instruments)

The UA723CNSR maintains full electrical equivalence with the KA723D but features a wider 14-SO package body (5.30mm width versus 3.90mm). This variant is Active status with ROHS3 compliance. PCB layout verification is required before selection, as the increased package width may affect board routing and component placement in space-constrained designs.

Frequently Asked Questions (FAQ)

Q: Can UA723CD be used as a direct replacement for KA723D without PCB modifications?

A: Yes. The UA723CD maintains identical electrical specifications and the standard 14-SOIC package footprint (0.154" width, 3.90mm). Pin configuration and electrical performance are fully compatible. No circuit modifications are required.

Q: What is the difference between UA723CD, UA723CDR, and UA723CNSR?

A: All three parts share identical electrical specifications and current output capability (150mA). The differences are: UA723CD uses Tube packaging, UA723CDR uses Cut Tape packaging, and UA723CNSR uses Tape & Reel packaging. Additionally, UA723CNSR features a wider package body (5.30mm versus 3.90mm), which may require PCB layout review.

Q: Why is UA723CDR marked as Last Time Buy?

A: Last Time Buy status indicates that Texas Instruments has announced end-of-life for this part number. Existing inventory is available, but future production will not occur. For new designs requiring long-term component availability, UA723CD (Active status) is the preferred selection.

Q: Are there any compliance differences between KA723D and the Texas Instruments substitutes?

A: The Texas Instruments substitutes (UA723CD, UA723CDR, UA723CNSR) are certified ROHS3 compliant. The KA723D compliance status is not specified in available documentation. Both manufacturers' parts are REACH Unaffected and carry EAR99 ECCN classification.

Q: Can UA723CNSR be used if space is limited on the PCB?

A: The UA723CNSR has a wider package body (5.30mm) compared to the standard 3.90mm width of KA723D and UA723CD. If PCB space is constrained, UA723CD is the better choice. UA723CNSR should only be selected if the wider package dimension has been verified as compatible with your board layout.

Q: What is the quiescent current specification for these regulators?

A: The KA723D specifies quiescent current (Iq) at 2mA. This parameter ensures low standby power consumption in battery-powered or low-power applications.