ISL78307FBECZ Equivalent & Substitute Parts

Part Overview

The ISL78307FBECZ is a linear voltage regulator IC from Renesas Electronics Corporation designed for positive adjustable output applications. This device delivers 50mA output current in an 8-SOIC package with exposed pad and is qualified to automotive grade (AEC-Q100). The part is currently listed as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

ISL78307FBECZ

Renesas Electronics CorporationIn Stock: 882ISL78307FBECZ Datasheet

Current PartRFQ

ISL78301FVECZ

Renesas Electronics CorporationIn Stock: 2058ISL78301FVECZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ISL78307FBECZ is determined by the following critical parameters:

• Output configuration (positive adjustable)
• Input voltage rating (40V maximum)
• Output voltage range (2.5V to 12V adjustable)
• Automotive grade qualification (AEC-Q100)
• Operating temperature range (-40°C to 125°C)
• Control features (Enable function)
• Protection features (Over Current, Over Temperature)
• RoHS3 compliance

The ISL78301FVECZ qualifies as a manufacturer-recommended substitute. While it operates in a different package format (14-HTSSOP versus 8-SOIC), it maintains electrical compatibility across all critical parameters. The substitute provides higher output current capability (150mA versus 50mA), which represents an enhancement rather than a limitation for applications designed around the original 50mA specification.

Parameter Comparison

Engineering Selection Recommendations

The ISL78301FVECZ is the manufacturer-recommended substitute for the obsolete ISL78307FBECZ. Both devices maintain identical automotive qualification (AEC-Q100) and operating temperature specifications. The substitute is currently in active production status, ensuring long-term availability and supply chain continuity.

Primary design consideration is package footprint change from 8-SOIC to 14-HTSSOP. PCB layout modification is required to accommodate the different pin configuration and package dimensions. The electrical performance of the ISL78301FVECZ exceeds the original specification, with improved PSRR (66dB versus 58dB at 100Hz) and higher output current capability (150mA versus 50mA).

Both parts maintain ROHS3 compliance and REACH unaffected status, supporting regulatory requirements for automotive applications.

Frequently Asked Questions (FAQ)

Q: Can the ISL78301FVECZ directly replace the ISL78307FBECZ without circuit modification?

A: Electrical substitution is valid. However, PCB layout modification is required due to package format change from 8-SOIC-EP to 14-HTSSOP. Pin assignments differ between the two packages.

Q: What is the primary reason for substitution?

A: The ISL78307FBECZ is obsolete. The ISL78301FVECZ is the manufacturer-recommended active alternative that maintains electrical compatibility across all critical parameters.

Q: Are there any performance differences between these parts?

A: The ISL78301FVECZ provides enhanced performance: PSRR improves from 58dB to 66dB at 100Hz, and output current capability increases from 50mA to 150mA. These represent improvements for applications designed around the original 50mA specification.

Q: Do both parts meet automotive qualification requirements?

A: Yes. Both the ISL78307FBECZ and ISL78301FVECZ are qualified to AEC-Q100 automotive grade and operate across the identical temperature range (-40°C to 125°C).

Q: What packaging differences exist between these parts?

A: ISL78307FBECZ uses 8-SOIC (0.154", 3.90mm width) with exposed pad. ISL78301FVECZ uses 14-HTSSOP (0.173", 4.40mm width) with exposed pad. Pin count and physical dimensions differ significantly.

Q: Are regulatory compliance statuses identical?

A: Yes. Both parts are ROHS3 compliant and REACH unaffected, maintaining identical regulatory status for automotive applications.