REG104GA-AG4 Equivalent & Substitute Parts

Part Overview

The REG104GA-AG4 is a linear voltage regulator IC from Texas Instruments designed for positive adjustable output applications. This Surface Mount device delivers 1A output current in a compact SOT-223-6 package and is classified as Obsolete. Due to its obsolete status, identifying equivalent and substitute parts is essential for design continuity and procurement planning. Substitute parts must maintain electrical compatibility across voltage ratings, current capacity, and thermal performance while meeting the same regulatory compliance standards.

Substiute Parts

REG104GA-AG4

Texas InstrumentsIn Stock: 21677REG104GA-AG4 Datasheet

Current PartRFQ

REG104GA-A

Texas InstrumentsIn Stock: 4914REG104GA-A Datasheet

MFR RecommendedRFQ

TL1963ADCQR

Texas InstrumentsIn Stock: 3617TL1963ADCQR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the REG104GA-AG4 are qualified based on the following electrical and mechanical parameters:

Primary Compatibility Criteria:

• Package / Case: SOT-223-6 (Surface Mount)
• Output Configuration: Positive Adjustable
• Voltage - Input (Max): ≥ 15V
• Voltage - Output Range: Minimum ≤ 1.295V, Maximum ≥ 5.5V
• Current - Output: ≥ 1A
• Voltage Dropout: ≤ 0.48V @ rated current
• Operating Temperature: Minimum ≤ -40°C, Maximum ≥ 85°C
• RoHS Compliance: ROHS3 Compliant

Substitute Categories:

Category 1: Direct Equivalent (REG104GA-A) Identical electrical specifications with different product status and packaging. Maintains all voltage, current, and thermal parameters. Suitable for direct replacement in existing designs.

Category 2: Enhanced Performance Substitute (TL1963ADCQR) Higher output current capacity (1.5A vs 1A) and extended input voltage range (20V vs 15V). Broader output voltage range and improved operating temperature ceiling. Requires verification of circuit design margins but provides superior performance headroom.

Parameter Comparison

Engineering Selection Recommendations

REG104GA-A Selection Criteria: REG104GA-A is the primary substitute for REG104GA-AG4. Both parts share identical electrical specifications and are manufactured by Texas Instruments in the same SOT-223-6 package. REG104GA-A carries Last Time Buy status, indicating limited availability. This part is suitable for designs requiring exact parameter matching and is recommended for immediate procurement if long-term supply is required.

TL1963ADCQR Selection Criteria: TL1963ADCQR is an enhanced substitute with Active product status, ensuring long-term availability. This part exceeds the electrical requirements of REG104GA-AG4 across multiple parameters: higher output current (1.5A), extended input voltage rating (20V), and broader output voltage range (1.21V to 20V). TL1963ADCQR also provides extended operating temperature range (-40°C to 125°C) and includes Reverse Polarity protection. Selection of TL1963ADCQR is appropriate for new designs or redesigns where enhanced performance margins are beneficial. All three parts maintain ROHS3 compliance and equivalent regulatory certifications.

Frequently Asked Questions (FAQ)

Q: Can REG104GA-A be used as a direct replacement for REG104GA-AG4? A: Yes. REG104GA-A is electrically and mechanically identical to REG104GA-AG4. Both parts deliver 1A output current, support adjustable positive output from 1.295V to 5.5V, and are packaged in SOT-223-6. The primary difference is product status: REG104GA-AG4 is Obsolete while REG104GA-A is Last Time Buy.

Q: What are the advantages of using TL1963ADCQR instead of REG104GA-AG4? A: TL1963ADCQR provides three key advantages: (1) Active product status ensures ongoing availability, (2) higher output current capacity of 1.5A versus 1A, and (3) extended input voltage rating of 20V versus 15V. Additionally, TL1963ADCQR supports output voltages up to 20V and includes Reverse Polarity protection. These enhancements provide greater design flexibility and system robustness.

Q: Are all three parts pin-compatible? A: All three parts use the SOT-223-6 package. Pin compatibility must be verified against specific pinout documentation, as package designation alone does not guarantee identical pin assignments.

Q: What is the difference in quiescent current between these parts? A: REG104GA-AG4 and REG104GA-A both draw 0.7 mA quiescent current. TL1963ADCQR draws 1 mA quiescent current, a 0.3 mA increase. This difference is negligible in most applications but should be considered in ultra-low-power designs.

Q: Do all substitute parts meet the same compliance standards? A: Yes. REG104GA-AG4, REG104GA-A, and TL1963ADCQR are all ROHS3 Compliant and REACH Unaffected. All parts carry identical regulatory certifications (ECCN: EAR99, HTSUS: 8542.39.0001).

Q: Which part should be selected for new designs? A: TL1963ADCQR is recommended for new designs due to its Active product status and enhanced electrical specifications. This ensures long-term supply availability and provides superior performance margins across voltage, current, and temperature parameters.