REG104GA-5 Equivalent & Substitute Parts

Part Overview

The REG104GA-5 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 5V output applications. This Surface Mount device in SOT-223-6 package delivers 1A output current with a maximum dropout voltage of 0.58V at rated load. The part is classified as Last Time Buy, indicating end-of-life status and the necessity to identify suitable alternatives for ongoing production and maintenance requirements.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Part Number	REG104GA-5
Category	Power Management (PMIC)
Package / Case	SOT-223-6
Output Type	Fixed
Output Voltage	5V
Output Current	1A
Input Voltage (Max)	15V
Dropout Voltage (Max)	0.58V @ 1A
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Product Status	Last Time Buy

Substitute Part Grouping Explanation

Substitute parts for the REG104GA-5 are identified based on the following critical parameters that determine functional compatibility:

Primary Substitution Criteria:

Package compatibility: SOT-223-6 form factor
Output voltage capability: Minimum 5V fixed or adjustable output
Output current rating: Minimum 1A capability
Input voltage tolerance: Support for up to 15V input
Mounting type: Surface Mount
Regulatory compliance: ROHS3 and REACH compliance

Substitute Categories:

Parametric Equivalent (REG104GA-5G4): Identical electrical specifications and package, differing only in product status (Obsolete vs. Last Time Buy).
Functional Upgrade (TL1963ADCQR): Higher output current rating (1.5A), adjustable output configuration, extended input voltage range (20V), and Active product status. Maintains SOT-223-6 package compatibility and can deliver 5V fixed output through external resistor configuration.

Parameter Comparison

Parameter	REG104GA-5	REG104GA-5G4	TL1963ADCQR
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments
Package / Case	SOT-223-6	SOT-223-6	SOT-223-6
Output Type	Fixed	Fixed	Adjustable
Output Voltage	5V	5V	1.21V - 20V
Output Current	1A	1A	1.5A
Input Voltage (Max)	15V	15V	20V
Dropout Voltage (Max)	0.58V @ 1A	0.58V @ 1A	0.55V @ 1.5A
Quiescent Current	0.7 mA	0.7 mA	1 mA
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C
Product Status	Last Time Buy	Obsolete	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

REG104GA-5G4 Selection: This part provides parametric equivalence to the REG104GA-5 with identical electrical performance. However, its Obsolete status makes it unsuitable for new procurement. Use only if existing inventory is available and immediate replacement is not feasible.

TL1963ADCQR Selection: This part is the recommended substitute for new designs and ongoing production. It maintains SOT-223-6 package compatibility and can be configured for fixed 5V output operation. The Active product status ensures long-term availability. The higher output current rating (1.5A) and extended operating temperature range (-40°C ~ 125°C) provide design margin. The adjustable output configuration requires external resistor network implementation to achieve fixed 5V output, but this is a standard design practice. All regulatory compliance requirements (ROHS3, REACH) are met.

Frequently Asked Questions (FAQ)

Q: Can TL1963ADCQR directly replace REG104GA-5 without circuit modifications?

A: The TL1963ADCQR requires external resistor configuration to set output voltage to 5V, whereas REG104GA-5 provides fixed 5V output. Direct pin-for-pin substitution is not possible without adding resistor divider network. Refer to TL1963ADCQR datasheet for resistor selection guidance.

Q: What is the difference between REG104GA-5 and REG104GA-5G4?

A: Both parts are electrically and functionally identical with matching specifications. The difference is product lifecycle status: REG104GA-5 is Last Time Buy while REG104GA-5G4 is Obsolete. Neither should be selected for new designs.

Q: Is the SOT-223-6 package identical across all three parts?

A: Yes, all three parts use the SOT-223-6 Surface Mount package with identical pinout and footprint compatibility.

Q: Does TL1963ADCQR meet the same compliance requirements?

A: Yes, TL1963ADCQR is ROHS3 Compliant and REACH Unaffected, matching the compliance profile of REG104GA-5.

Q: What is the maximum input voltage for each part?

A: REG104GA-5 and REG104GA-5G4 support maximum 15V input. TL1963ADCQR supports maximum 20V input, providing greater design flexibility for higher input voltage applications.

Q: Can REG104GA-5G4 be used as a substitute?

A: REG104GA-5G4 is not recommended due to Obsolete status. TL1963ADCQR is the preferred alternative with Active availability.

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