CS5203-3GDPR3 Equivalent & Substitute Parts

Part Overview

The CS5203-3GDPR3 is a linear voltage regulator IC manufactured by onsemi, designed to deliver a fixed 3.3V output at 3A in a D2PAK-3 surface mount package. This positive fixed output regulator integrates over-current and over-temperature protection features, making it suitable for applications requiring stable 3.3V power distribution with moderate current demands.

The CS5203-3GDPR3 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or maintenance of systems utilizing this component.

Substiute Parts

CS5203-3GDPR3

onsemiIn Stock: 8962CS5203-3GDPR3 Datasheet

Current PartRFQ

LT1587CM-3.3#PBF

Analog Devices Inc.In Stock: 1120LT1587CM-3.3#PBF Datasheet

DirectRFQ

LT1587CM-3.3#TRPBF

Analog Devices Inc.In Stock: 1683LT1587CM-3.3#TRPBF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CS5203-3GDPR3 are qualified based on the following critical parameters:

• Fixed output voltage of 3.3V
• Output current capability of 3A minimum
• Maximum input voltage of 7V or greater
• D2PAK-3 package compatibility (TO-263-4 form factor)
• Surface mount technology
• Integrated over-current and over-temperature protection

The LT1587CM-3.3#PBF and LT1587CM-3.3#TRPBF, both manufactured by Analog Devices Inc., meet these substitution criteria. Both variants are electrically and mechanically equivalent, differing only in packaging format (Tube versus Cut Tape & Digi-Reel®). These parts maintain the same output voltage, current rating, input voltage specification, and package footprint as the original CS5203-3GDPR3.

Parameter Comparison

Engineering Selection Recommendations

Both LT1587CM-3.3#PBF and LT1587CM-3.3#TRPBF are direct functional equivalents to the CS5203-3GDPR3. The Analog Devices LT1587 series offers improved specifications in several areas: lower dropout voltage (1.3V versus 1.4V), extended operating temperature range (0°C ~ 125°C versus 0°C ~ 70°C), additional short-circuit protection, and ROHS3 compliance.

Selection between the two Analog Devices variants depends on procurement and assembly requirements. The LT1587CM-3.3#PBF is supplied in Tube packaging, while the LT1587CM-3.3#TRPBF is supplied in Cut Tape & Digi-Reel® format. Both maintain identical electrical performance and package footprint compatibility.

Frequently Asked Questions (FAQ)

Q: Are the LT1587CM-3.3 variants pin-compatible with the CS5203-3GDPR3?

A: Yes. Both the LT1587CM-3.3#PBF and LT1587CM-3.3#TRPBF use the D2PAK-3 (DDPAK-3) package, which is mechanically and electrically compatible with the original CS5203-3GDPR3 D2PAK-3 package. Pin assignments and footprints are identical.

Q: What is the difference between LT1587CM-3.3#PBF and LT1587CM-3.3#TRPBF?

A: The two parts are electrically identical. The difference is in packaging format: LT1587CM-3.3#PBF is supplied in Tube packaging, while LT1587CM-3.3#TRPBF is supplied in Cut Tape & Digi-Reel® format. Selection depends on your assembly process and procurement workflow.

Q: Can I use the LT1587CM-3.3 in applications requiring operation above 70°C?

A: Yes. The LT1587CM-3.3 variants support operating temperatures up to 125°C, compared to the CS5203-3GDPR3 maximum of 70°C. This extended range provides greater thermal margin for demanding applications.

Q: Does the LT1587CM-3.3 provide better protection than the original part?

A: The LT1587CM-3.3 includes short-circuit protection in addition to the over-current and over-temperature protection present in the CS5203-3GDPR3, offering enhanced circuit protection.

Q: Are there any compliance differences between the original and substitute parts?

A: Yes. The LT1587CM-3.3 variants are ROHS3 compliant with MSL 1 (unlimited shelf life), while the CS5203-3GDPR3 is RoHS non-compliant with MSL 2 (1 year shelf life). For new designs or compliance-sensitive applications, the Analog Devices substitutes are preferred.