REG104GA-2.5 Equivalent & Substitute Parts

Part Overview

The REG104GA-2.5 is a linear voltage regulator IC from Texas Instruments designed for positive fixed output applications. This Surface Mount device delivers 1A output current with a fixed 2.5V output and operates across a -40°C to 85°C temperature range. The part is classified as Last Time Buy, indicating end-of-life status. Identifying equivalent and substitute parts is essential for design continuity, long-term supply chain planning, and ensuring project viability when original inventory becomes unavailable.

Substiute Parts

REG104GA-2.5

Texas InstrumentsIn Stock: 1734REG104GA-2.5 Datasheet

Current PartRFQ

TL1963ADCQR

Texas InstrumentsIn Stock: 3617TL1963ADCQR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the REG104GA-2.5 is determined by the following critical parameters:

• Package Compatibility: Both parts must use SOT-223-6 Surface Mount packaging to ensure PCB layout compatibility without redesign.
• Output Configuration: Positive output regulators only.
• Voltage Output Range: The substitute must support the required 2.5V fixed output or provide adjustable output capability that includes 2.5V within its operating range.
• Current Rating: The substitute must deliver at least 1A output current to meet or exceed the original specification.
• Input Voltage Tolerance: The substitute must accept the maximum input voltage of 15V or higher.
• Thermal Performance: Operating temperature range must cover the application requirements.
• Regulatory Compliance: RoHS3 compliance and REACH status must be maintained.

The TL1963ADCQR qualifies as a substitute based on these parameters. Although it features adjustable output (versus fixed), its minimum output voltage of 1.21V and maximum of 20V encompass the 2.5V requirement. The higher current rating (1.5A), improved input voltage tolerance (20V max), and extended temperature range (-40°C to 125°C) provide enhanced performance margins.

Parameter Comparison

Engineering Selection Recommendations

The TL1963ADCQR is suitable as a substitute for the REG104GA-2.5 based on the following engineering criteria:

• Product Status: The TL1963ADCQR maintains Active status, ensuring continued availability and long-term supply chain reliability, whereas the REG104GA-2.5 is Last Time Buy.
• Regulatory Compliance: Both parts maintain ROHS3 compliance and REACH Unaffected status, satisfying environmental and regulatory requirements.
• Package Compatibility: Identical SOT-223-6 Surface Mount packaging eliminates PCB redesign requirements.
• Performance Enhancement: The TL1963ADCQR provides higher current capacity (1.5A vs. 1A), extended input voltage range (20V vs. 15V), and broader operating temperature range (-40°C to 125°C vs. -40°C to 85°C).
• Output Configuration Difference: The adjustable output of the TL1963ADCQR requires external resistor network configuration to establish 2.5V output, whereas the REG104GA-2.5 provides fixed 2.5V output without external components.

Selection of the TL1963ADCQR requires circuit design modification to implement the adjustable output network but provides superior performance margins and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the TL1963ADCQR directly replace the REG104GA-2.5 without circuit modification?

A: No. The REG104GA-2.5 provides fixed 2.5V output, while the TL1963ADCQR requires external resistor divider network configuration to set output voltage. PCB layout modification is necessary to accommodate the feedback network components.

Q: Are the packages physically identical?

A: Yes. Both parts use SOT-223-6 Surface Mount packaging with identical pin configuration and footprint, allowing direct PCB placement without redesign.

Q: What is the advantage of the TL1963ADCQR over the REG104GA-2.5?

A: The TL1963ADCQR offers higher output current (1.5A vs. 1A), higher maximum input voltage (20V vs. 15V), extended operating temperature range (125°C vs. 85°C maximum), and Active product status ensuring long-term availability.

Q: Does the TL1963ADCQR maintain the same regulatory compliance?

A: Yes. Both parts are ROHS3 compliant and REACH Unaffected, maintaining identical environmental and regulatory certification status.

Q: What external components are required to configure the TL1963ADCQR for 2.5V output?

A: The TL1963ADCQR requires a resistor feedback network connected to the feedback pin to establish the 2.5V output voltage. Specific resistor values depend on the reference voltage and desired output. Consult the TL1963ADCQR datasheet for feedback network design calculations.

Q: Is the quiescent current difference significant?

A: The TL1963ADCQR quiescent current is 1 mA versus 0.7 mA for the REG104GA-2.5. This 0.3 mA difference is negligible in most applications but should be evaluated for ultra-low-power designs.