TPS73630DBVT Linear Voltage Regulator 3V 400mA Equivalent & Substitute Parts

Part Overview

The TPS73630DBVT is a linear voltage regulator IC from Texas Instruments designed for positive fixed 3V output at 400mA in a SOT-23-5 surface mount package. This device is classified as Last Time Buy, indicating discontinued production. Finding equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications requiring 3V regulated power with 400mA output capability.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	3V
Output Current	400mA
Input Voltage (Max)	5.5V
Voltage Dropout (Max)	0.2V @ 400mA
Quiescent Current	550 µA
Package Type	SOT-23-5 (SC-74A, SOT-753)
Operating Temperature Range	-40°C to 125°C
Protection Features	Over Current, Over Temperature, Reverse Polarity
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the TPS73630DBVT is determined by the following critical parameters:

Output voltage fixed at 3V
Input voltage maximum of 5.5V
SOT-23-5 package compatibility
Operating temperature range of -40°C to 125°C
ROHS3 compliance and REACH unaffected status

Substitute parts are grouped into two categories based on output current capability:

Direct Parametric Equivalent: TPS73630DBVR matches all electrical specifications and differs only in product status (Active vs. Last Time Buy).

Functional Equivalents with Current Derating: MIC5305-3.0YD5-TR (150mA), MIC5319-3.0YD5-TR (500mA), and RT9193-30GB (300mA) provide the same 3V output and package form factor but with different output current ratings and dropout voltage characteristics.

Parameter Comparison

Parameter	TPS73630DBVT	TPS73630DBVR	MIC5305-3.0YD5-TR	MIC5319-3.0YD5-TR	RT9193-30GB
Manufacturer	Texas Instruments	Texas Instruments	Microchip Technology	Microchip Technology	Richtek USA Inc.
Output Voltage	3V	3V	3V	3V	3V
Output Current	400mA	400mA	150mA	500mA	300mA
Input Voltage (Max)	5.5V	5.5V	5.5V	5.5V	5.5V
Voltage Dropout (Max)	0.2V @ 400mA	0.2V @ 400mA	0.85V @ 150mA	0.4V @ 500mA	0.3V @ 300mA
Quiescent Current	550 µA	550 µA	150 µA	150 µA	130 µA
Package	SOT-23-5	SOT-23-5	TSOT-23-5	TSOT-23-5	SOT-23-5
Operating Temperature	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C
Product Status	Last Time Buy	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

TPS73630DBVR is the primary substitute for the TPS73630DBVT. Both parts are manufactured by Texas Instruments with identical electrical specifications and package form factor. The TPS73630DBVR maintains Active product status, ensuring long-term availability and supply chain stability. This part is recommended for direct replacement in existing designs without modification.

MIC5319-3.0YD5-TR is suitable for applications where output current requirements do not exceed 500mA. This Microchip Technology device provides superior quiescent current performance (150 µA vs. 550 µA) and improved dropout voltage characteristics at rated current (0.4V @ 500mA). The TSOT-23-5 package is mechanically compatible with SOT-23-5 footprints. This part is recommended for new designs or redesigns where lower power consumption is beneficial.

RT9193-30GB is appropriate for applications requiring 300mA or less output current. The Richtek device offers lower quiescent current (130 µA) and moderate dropout voltage (0.3V @ 300mA). All regulatory compliance certifications match the original part. This option is recommended when current requirements are limited to 300mA or below.

MIC5305-3.0YD5-TR is limited to 150mA output current and exhibits higher dropout voltage (0.85V @ 150mA). This part is suitable only for low-current applications and is not recommended as a general substitute for the 400mA-rated TPS73630DBVT.

All substitute parts maintain ROHS3 compliance, REACH unaffected status, and identical operating temperature ranges, ensuring regulatory and environmental compatibility with the original design.

Frequently Asked Questions (FAQ)

Q: Can TPS73630DBVR be used as a direct replacement for TPS73630DBVT?

A: Yes. The TPS73630DBVR is a parametric equivalent with identical electrical specifications, output current rating (400mA), dropout voltage (0.2V @ 400mA), and package type (SOT-23-5). The only difference is product status; TPS73630DBVR is Active while TPS73630DBVT is Last Time Buy. No circuit modifications are required.

Q: What is the difference between SOT-23-5 and TSOT-23-5 packages?

A: Both packages are mechanically and electrically compatible for PCB footprint purposes. SOT-23-5 and TSOT-23-5 (thin variant) share the same pin configuration and spacing. The primary difference is package thickness; TSOT-23-5 is a thinner version. Existing SOT-23-5 footprints will accommodate TSOT-23-5 components without modification.

Q: Can MIC5319-3.0YD5-TR replace TPS73630DBVT in a 400mA application?

A: MIC5319-3.0YD5-TR is rated for 500mA maximum output current, which exceeds the 400mA requirement of the original design. However, the dropout voltage is 0.4V @ 500mA, compared to 0.2V @ 400mA for the TPS73630DBVT. If the application operates at or near 400mA, verify that the higher dropout voltage does not compromise system performance. The part is suitable for applications where 400mA is within its operating range.

Q: Why does MIC5305-3.0YD5-TR have higher dropout voltage than other substitutes?

A: MIC5305-3.0YD5-TR is rated for 150mA maximum output current. Dropout voltage specifications are measured at the device's rated current; therefore, the 0.85V dropout at 150mA reflects the electrical characteristics of a lower-current regulator design. This part is not suitable for applications requiring 400mA output.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed (TPS73630DBVR, MIC5305-3.0YD5-TR, MIC5319-3.0YD5-TR, and RT9193-30GB) are ROHS3 compliant and REACH unaffected, matching the regulatory status of the original TPS73630DBVT.

Q: What is the impact of lower quiescent current in substitute parts?

A: Lower quiescent current reduces standby power consumption. MIC5319-3.0YD5-TR and MIC5305-3.0YD5-TR both feature 150 µA quiescent current compared to 550 µA in the TPS73630DBVT. RT9193-30GB offers 130 µA. In battery-powered or low-power applications, this reduction can extend operating time. In line-powered applications, the impact is negligible.

Q: Can these parts be used interchangeably in the same PCB design?

A: TPS73630DBVR can be used interchangeably with TPS73630DBVT without any design changes. MIC5319-3.0YD5-TR and RT9193-30GB require verification that output current requirements do not exceed their respective ratings (500mA and 300mA). MIC5305-3.0YD5-TR is limited to 150mA and is not suitable for 400mA applications. All parts use SOT-23-5 or compatible TSOT-23-5 packages and share identical pin configurations.

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