REG104GA-A Equivalent & Substitute Parts

Part Overview

The REG104GA-A 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 Last Time Buy, indicating end-of-life status. The product requires alternative components for new designs or when inventory becomes unavailable. Substitute parts must maintain compatibility across output configuration, adjustable voltage range, current capacity, and thermal operating specifications.

Key Parameters

Parameter	REG104GA-A
Manufacturer	Texas Instruments
Output Configuration	Positive Adjustable
Current - Output	1A
Voltage - Input (Max)	15V
Voltage - Output (Min/Fixed)	1.295V
Voltage - Output (Max)	5.5V
Voltage Dropout (Max)	0.48V @ 1A
Package / Case	SOT-223-6
Operating Temperature	-40°C ~ 85°C
Product Status	Last Time Buy

Substitute Part Grouping Explanation

Substitution eligibility for the REG104GA-A is determined by the following critical parameters:

Output Configuration: Must be Positive Adjustable
Number of Regulators: Must be 1
Mounting Type: Must be Surface Mount
Output Type: Must be Adjustable
RoHS Status: Must be ROHS3 Compliant
Current - Output: Must support minimum 1A
Voltage - Output Range: Must accommodate the required adjustable voltage window
Package compatibility: SOT-223-6 preferred; alternative packages acceptable if pinout and thermal characteristics are equivalent

The substitute parts identified below meet these core electrical and mechanical requirements while offering improved product status or enhanced performance characteristics.

Parameter Comparison

Parameter	REG104GA-A	TL1963ADCQR	BD00GC0WEFJ-E2
Manufacturer	Texas Instruments	Texas Instruments	Rohm Semiconductor
Output Configuration	Positive	Positive	Positive
Output Type	Adjustable	Adjustable	Adjustable
Number of Regulators	1	1	1
Current - Output	1A	1.5A	1A
Voltage - Input (Max)	15V	20V	14V
Voltage - Output (Min/Fixed)	1.295V	1.21V	1.5V
Voltage - Output (Max)	5.5V	20V	13V
Voltage Dropout (Max)	0.48V @ 1A	0.55V @ 1.5A	0.92V @ 1A
Operating Temperature	-40°C ~ 85°C	-40°C ~ 125°C	-25°C ~ 85°C
Package / Case	SOT-223-6	SOT-223-6	8-SOIC (0.154", 3.90mm Width) Exposed Pad
Product Status	Last Time Buy	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	2 (1 Year)	2 (1 Year)	1 (Unlimited)

Engineering Selection Recommendations

TL1963ADCQR is the primary substitute for REG104GA-A. Both devices are manufactured by Texas Instruments and share identical SOT-223-6 packaging. The TL1963ADCQR maintains Active product status, ensuring long-term availability and supply chain stability. This part offers enhanced specifications including higher maximum input voltage (20V vs. 15V), increased output current capability (1.5A vs. 1A), and extended operating temperature range (-40°C ~ 125°C vs. -40°C ~ 85°C). The TL1963ADCQR is directly compatible with existing PCB layouts designed for REG104GA-A.

BD00GC0WEFJ-E2 from Rohm Semiconductor is an alternative substitute that maintains 1A output current matching the original specification. This part is Active and offers superior moisture sensitivity rating (MSL 1 vs. MSL 2). However, the BD00GC0WEFJ-E2 uses an 8-HTSOP-J package rather than SOT-223-6, requiring PCB layout modification. The higher dropout voltage (0.92V @ 1A vs. 0.48V @ 1A) and narrower operating temperature range (-25°C ~ 85°C) should be evaluated against application requirements.

Frequently Asked Questions (FAQ)

Q: Can TL1963ADCQR directly replace REG104GA-A without PCB modifications?

A: Yes. Both parts use SOT-223-6 packaging with identical pinout and footprint. No PCB layout changes are required. The TL1963ADCQR is pin-compatible and functionally compatible with REG104GA-A.

Q: What are the key differences between TL1963ADCQR and REG104GA-A?

A: The TL1963ADCQR offers higher maximum input voltage (20V vs. 15V), increased output current (1.5A vs. 1A), lower quiescent current (1 mA vs. 0.7 mA), and extended operating temperature range (-40°C ~ 125°C vs. -40°C ~ 85°C). Both maintain adjustable output configuration and ROHS3 compliance.

Q: Why does BD00GC0WEFJ-E2 have a different package?

A: BD00GC0WEFJ-E2 uses 8-HTSOP-J packaging, which is a different form factor from SOT-223-6. This package change requires PCB redesign and cannot be used as a direct drop-in replacement.

Q: Is BD00GC0WEFJ-E2 suitable for applications requiring extended temperature operation?

A: No. BD00GC0WEFJ-E2 operates from -25°C ~ 85°C, which is narrower than REG104GA-A (-40°C ~ 85°C). Applications requiring -40°C operation must use TL1963ADCQR or REG104GA-A.

Q: What is the impact of higher dropout voltage in BD00GC0WEFJ-E2?

A: BD00GC0WEFJ-E2 exhibits 0.92V dropout at 1A compared to 0.48V for REG104GA-A. This higher dropout voltage requires greater input-to-output voltage differential and may increase power dissipation in current-limited applications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. REG104GA-A, TL1963ADCQR, and BD00GC0WEFJ-E2 are all ROHS3 compliant and REACH unaffected.

Q: Which substitute offers the best long-term availability?

A: TL1963ADCQR is recommended for new designs. It maintains Active product status from Texas Instruments, ensuring continued manufacturing and supply chain support. REG104GA-A is Last Time Buy, indicating production discontinuation.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message