RT2558-33GSP Equivalent & Substitute Parts

Part Overview

The RT2558-33GSP is a linear voltage regulator IC from Richtek USA Inc. designed for positive fixed 3.3V output applications with 100mA current capacity. This Surface Mount device operates across -40°C to 85°C and features integrated over-current and over-temperature protection. The part is currently discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing production and maintenance applications.

Substiute Parts

RT2558-33GSP

Richtek USA Inc.In Stock: 879RT2558-33GSP Datasheet

Current PartRFQ

RT2560Q-33GSP

Richtek USA Inc.In Stock: 1762RT2560Q-33GSP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RT2558-33GSP are identified based on strict electrical and mechanical parameter matching:

Critical Matching Parameters:

• Output voltage: 3.3V fixed
• Output current capacity: 100mA
• Input voltage maximum: 36V
• Voltage dropout: 0.55V @ 10mA
• Package type: 8-SOIC with Exposed Pad
• Protection features: Over Current and Over Temperature
• Operating temperature range: -40°C ~ 85°C
• RoHS compliance: ROHS3 Compliant

The RT2560Q-33GSP meets all electrical specifications and mechanical requirements for direct substitution. Both devices share identical output voltage, current rating, input voltage tolerance, dropout voltage, package configuration, and protection mechanisms.

Parameter Comparison

Engineering Selection Recommendations

The RT2560Q-33GSP is the direct substitute for the discontinued RT2558-33GSP. Both devices are manufactured by Richtek USA Inc. and share identical electrical specifications and package configuration.

The RT2560Q-33GSP offers additional advantages: it maintains active product status with higher inventory availability, includes Automotive grade qualification with AEC-Q100 certification, and is supplied in Tape & Reel packaging format suitable for automated assembly processes. The quiescent current difference of 1.5 µA is negligible for most applications and does not affect functional compatibility.

Selection of the RT2560Q-33GSP is appropriate for all applications previously using the RT2558-33GSP without circuit modification or re-qualification, provided the automotive-grade specification does not conflict with existing procurement requirements.

Frequently Asked Questions (FAQ)

Q: Can RT2560Q-33GSP directly replace RT2558-33GSP without circuit changes?

A: Yes. Both devices have identical output voltage (3.3V), output current (100mA), input voltage rating (36V maximum), voltage dropout (0.55V @ 10mA), operating temperature range (-40°C ~ 85°C), and package configuration (8-SOIC with Exposed Pad). No circuit modifications are required.

Q: What is the difference in quiescent current between these parts?

A: The RT2558-33GSP has a quiescent current of 4.6 µA, while the RT2560Q-33GSP has 5 µA. This 1.5 µA difference is negligible in most applications and does not affect functional compatibility or circuit performance.

Q: Why does RT2560Q-33GSP have Automotive grade and AEC-Q100 qualification?

A: The RT2560Q-33GSP is qualified for automotive applications per AEC-Q100 standards. This qualification indicates the device meets additional reliability and testing requirements for automotive environments. Standard-grade applications can use this part without issue.

Q: Are the packages identical?

A: Yes. Both devices use the 8-SOIC (0.154", 3.90mm Width) Exposed Pad package. The only packaging difference is that RT2560Q-33GSP is supplied in Tape & Reel format while RT2558-33GSP uses standard packaging. This does not affect the component itself or PCB assembly compatibility.

Q: Is RT2560Q-33GSP RoHS compliant?

A: Yes. The RT2560Q-33GSP is ROHS3 compliant, matching the compliance status of the RT2558-33GSP.