CS5203A-3GDPSR3 Equivalent & Substitute Parts

Part Overview

The CS5203A-3GDPSR3 is a linear voltage regulator IC from onsemi, designed to deliver a fixed 3.3V output at 3A in a D2PAK-3 surface mount package. This device is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing production support and design continuity. The part operates across an input voltage range up to 17V with integrated over-current and over-temperature protection features.

Substiute Parts

CS5203A-3GDPSR3

onsemiIn Stock: 897CS5203A-3GDPSR3 Datasheet

Current PartRFQ

LD1085D2M33R

STMicroelectronicsIn Stock: 6828LD1085D2M33R Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CS5203A-3GDPSR3 is determined by the following critical parameters:

• Fixed output voltage of 3.3V
• Minimum output current capability of 3A
• D2PAK-3 package compatibility
• Input voltage rating sufficient for application requirements
• Matching protection features (over-current and over-temperature)

The LD1085D2M33R from STMicroelectronics meets these core substitution criteria. Both devices deliver 3.3V at 3A in identical D2PAK-3 packaging with equivalent protection mechanisms. Differences in input voltage rating, dropout voltage, and operating temperature range do not preclude substitution when the application requirements fall within the substitute part's specifications.

Parameter Comparison

Engineering Selection Recommendations

The LD1085D2M33R is a direct functional substitute for the CS5203A-3GDPSR3 based on matching output specifications and package compatibility. The substitute part offers the following advantages:

• Active product status ensures long-term availability and supply chain continuity
• ROHS3 compliance supports modern manufacturing and environmental standards
• Extended operating temperature range (-40°C ~ 125°C) provides broader application flexibility
• Higher input voltage rating (30V vs. 17V) accommodates wider input supply variations
• Improved moisture sensitivity level (MSL 1 vs. MSL 2) reduces handling constraints

The LD1085D2M33R operates within the same D2PAK-3 package footprint, enabling direct PCB-level substitution without layout modifications. Pin configuration and thermal characteristics remain equivalent.

Frequently Asked Questions (FAQ)

Q: Can the LD1085D2M33R replace the CS5203A-3GDPSR3 in existing designs?

A: Yes. Both devices deliver 3.3V at 3A in D2PAK-3 packaging with identical pin configurations and thermal dissipation characteristics. Direct substitution is possible without PCB redesign.

Q: What are the key differences between these parts?

A: The primary differences are product status (obsolete vs. active), input voltage rating (17V vs. 30V), dropout voltage (1.15V vs. 1.5V), and operating temperature range (0°C–70°C vs. -40°C–125°C). The LD1085D2M33R also provides ROHS3 compliance and improved moisture sensitivity rating.

Q: Does the higher input voltage rating of the LD1085D2M33R affect compatibility?

A: No. A higher input voltage rating does not compromise compatibility. The substitute part operates safely across the original part's input voltage range and extends capability to higher voltages if needed.

Q: Are there thermal or PCB layout considerations for substitution?

A: Both parts use identical D2PAK-3 packaging with matching thermal characteristics. Existing thermal management and PCB layouts require no modification.

Q: What is the impact of the different dropout voltages?

A: The LD1085D2M33R has a maximum dropout of 1.5V compared to 1.15V for the original part. This difference is relevant only in applications with minimal input-to-output voltage margins. For standard applications with adequate headroom, this difference is not significant.

Q: Does the extended operating temperature range of the LD1085D2M33R affect selection?

A: The extended range (-40°C to 125°C) is a superset of the original part's range (0°C to 70°C). This provides additional flexibility for applications requiring broader temperature operation without introducing compatibility issues.