CS5201-3GT3 Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The CS5201-3GT3 is a linear voltage regulator IC manufactured by onsemi, designed to deliver a fixed 3.3V output at 1A maximum current in a TO-220-3 through-hole package. This device is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support, design updates, and procurement continuity. The regulator incorporates over-current and over-temperature protection features suitable for general-purpose power management applications requiring positive fixed voltage regulation.

Substiute Parts

CS5201-3GT3

onsemiIn Stock: 1155CS5201-3GT3 Datasheet

Current PartRFQ

LM2940CT-5.0/NOPB

Texas InstrumentsIn Stock: 20937LM2940CT-5.0/NOPB Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CS5201-3GT3 is determined by the following critical parameters:

• Output Voltage: The substitute must provide a fixed output voltage compatible with the 3.3V requirement or adjustable to 3.3V
• Output Current Capability: Minimum 1A at rated conditions
• Package Type: TO-220-3 through-hole package for direct mechanical and electrical compatibility
• Input Voltage Range: Must accommodate the maximum 7V input specification
• Voltage Dropout: Should not exceed 1.2V @ 1A to maintain regulation within the specified input range
• Protection Features: Over-temperature protection is mandatory; over-current or short-circuit protection is required
• Operating Temperature: Must support at least 0°C ~ 70°C range

The LM2940CT-5.0/NOPB from Texas Instruments meets the mechanical and electrical interface requirements for substitution, though output voltage differs at 5V fixed. This part is suitable only for applications where 5V output is acceptable or where the regulator is used in a voltage divider or post-regulation configuration.

Parameter Comparison

Engineering Selection Recommendations

The LM2940CT-5.0/NOPB is the identified substitute based on matching mechanical interface (TO-220-3 package), electrical output current capability (1A), and protection feature requirements. This part is currently in active production status with ROHS3 compliance, addressing the obsolescence of the CS5201-3GT3.

Critical Consideration: The output voltage difference (5V versus 3.3V) requires circuit-level evaluation. Direct substitution is only valid for applications designed to operate at 5V output. For systems requiring 3.3V output, additional voltage regulation or conversion circuitry must be implemented downstream of the LM2940CT-5.0/NOPB.

The LM2940CT-5.0/NOPB provides superior input voltage tolerance (26V maximum versus 7V), lower dropout voltage (1V versus 1.2V), and extended operating temperature range (0°C ~ 125°C versus 0°C ~ 70°C), making it suitable for more demanding applications when output voltage compatibility is confirmed.

Frequently Asked Questions (FAQ)

Q: Can the LM2940CT-5.0/NOPB directly replace the CS5201-3GT3 in my circuit?

A: Direct replacement is possible only if your circuit is designed to operate at 5V output. The LM2940CT-5.0/NOPB provides fixed 5V output, not 3.3V. If your application requires 3.3V, additional post-regulation or voltage conversion is required.

Q: What are the key differences between these two regulators?

A: The primary differences are output voltage (3.3V versus 5V), input voltage rating (7V versus 26V), dropout voltage (1.2V versus 1V), and product status (obsolete versus active). Both share identical TO-220-3 packaging and 1A output current capability.

Q: Is the LM2940CT-5.0/NOPB RoHS compliant?

A: Yes, the LM2940CT-5.0/NOPB is ROHS3 compliant, whereas the CS5201-3GT3 is RoHS non-compliant. This is relevant for applications subject to RoHS regulations.

Q: What protection features does the LM2940CT-5.0/NOPB provide?

A: The LM2940CT-5.0/NOPB includes over-temperature protection, reverse polarity protection, and short-circuit protection. The CS5201-3GT3 provides over-current and over-temperature protection.

Q: Can I use the LM2940CT-5.0/NOPB with input voltages up to 26V?

A: Yes, the LM2940CT-5.0/NOPB is rated for input voltages up to 26V maximum, compared to 7V for the CS5201-3GT3. This provides greater design flexibility for higher input voltage applications.

Q: What is the operating temperature range difference?

A: The CS5201-3GT3 operates from 0°C to 70°C, while the LM2940CT-5.0/NOPB operates from 0°C to 125°C. The extended range of the LM2940CT-5.0/NOPB allows use in higher-temperature environments.