TPS73630DBVR Linear Voltage Regulator 3V 400mA Equivalent & Substitute Parts

Part Overview

The TPS73630DBVR is a linear voltage regulator IC from Texas Instruments designed for positive fixed 3V output applications with 400mA current capacity. This Surface Mount device in SOT-23-5 package is currently in Active product status with 4400 units in stock. Alternative equivalent and substitute parts are necessary when the primary part reaches end-of-life, inventory constraints occur, or when design requirements allow for compatible alternatives with different electrical characteristics within acceptable operating parameters.

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)
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 TPS73630DBVR 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 -40°C to 125°C
Output current capacity (400mA primary specification)
Positive output configuration with single regulator
Enable control feature
Over current and over temperature protection

Substitute parts are grouped into two categories: parametric equivalents (identical electrical specifications) and manufacturer-recommended alternatives (compatible but with different current ratings or electrical characteristics). All substitutes maintain the same output voltage, input voltage limits, package form factor, and core protection features.

Parameter Comparison

Parameter	TPS73630DBVR	TPS73630DBVT	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
PSRR	58dB ~ 37dB (100Hz ~ 10kHz)	58dB ~ 37dB (100Hz ~ 10kHz)	85dB ~ 65dB (1kHz ~ 10kHz)	70dB ~ 60dB (1kHz ~ 10kHz)	70dB ~ 50dB (100Hz ~ 10kHz)
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	Active	Last Time Buy	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Inventory Status	4400 Pcs New Original	2700 Pcs New Original	3402 Pcs New Original	20100 Pcs New Original	20100 Pcs New Original

Engineering Selection Recommendations

TPS73630DBVT (Parametric Equivalent): This Texas Instruments part is electrically identical to the TPS73630DBVR with matching 400mA output current, 0.2V dropout voltage, and 550 µA quiescent current. Both parts are ROHS3 compliant and operate across -40°C to 125°C. Selection of TPS73630DBVT is appropriate for direct replacement in existing designs. Note that TPS73630DBVT carries Last Time Buy status, indicating limited future availability.

MIC5305-3.0YD5-TR (Lower Current Alternative): This Microchip Technology part provides 150mA output current with superior PSRR performance (85dB ~ 65dB) and lower quiescent current (150 µA). The higher dropout voltage of 0.85V @ 150mA requires circuit evaluation. Selection is appropriate only for applications requiring less than 150mA output current. TSOT-23-5 package maintains SOT-23-5 form factor compatibility.

MIC5319-3.0YD5-TR (Higher Current Alternative): This Microchip Technology part provides 500mA output current, exceeding the primary part specification. Dropout voltage is 0.4V @ 500mA with 150 µA quiescent current. Selection is appropriate for applications requiring up to 500mA output current. TSOT-23-5 package maintains SOT-23-5 form factor compatibility. Highest inventory availability at 20100 units.

RT9193-30GB (Mid-Range Alternative): This Richtek USA Inc. part provides 300mA output current with 0.3V dropout voltage and 130 µA quiescent current. PSRR performance is 70dB ~ 50dB. Selection is appropriate for applications requiring 300mA or less. Standard SOT-23-5 package. Moisture Sensitivity Level is MSL-3 (168 Hours) compared to MSL-1 for other parts. High inventory availability at 20100 units.

All substitute parts maintain ROHS3 compliance, REACH unaffected status, and identical EAR99 export classification. Selection should be based on specific output current requirements and dropout voltage tolerance of the target application.

Frequently Asked Questions (FAQ)

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

A: Yes. TPS73630DBVT is a parametric equivalent with identical electrical specifications including 400mA output current, 0.2V dropout voltage, and 550 µA quiescent current. Both use SOT-23-5 packaging and operate across -40°C to 125°C. The primary difference is product status; TPS73630DBVT is Last Time Buy while TPS73630DBVR is Active.

Q: Which substitute part has the best power supply rejection ratio (PSRR)?

A: MIC5305-3.0YD5-TR provides the highest PSRR at 85dB ~ 65dB (1kHz ~ 10kHz). However, this part is limited to 150mA output current. For applications requiring higher current capacity, MIC5319-3.0YD5-TR offers 70dB ~ 60dB PSRR with 500mA capability.

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

A: Both package designations refer to the same physical form factor (5-pin small outline transistor). SOT-23-5 and TSOT-23-5 are compatible for PCB layout and assembly purposes. The "T" in TSOT-23-5 indicates a thin variant, but dimensional compatibility is maintained for standard SOT-23-5 footprints.

Q: Can MIC5305-3.0YD5-TR replace TPS73630DBVR in a 400mA application?

A: No. MIC5305-3.0YD5-TR is rated for maximum 150mA output current. Using this part in a 400mA application would exceed its current specification and result in thermal stress and potential device failure. Selection must match or exceed the application's current requirement.

Q: Which substitute part has the lowest quiescent current?

A: RT9193-30GB has the lowest quiescent current at 130 µA, followed by MIC5305-3.0YD5-TR and MIC5319-3.0YD5-TR at 150 µA each. The primary TPS73630DBVR has 550 µA quiescent current. Lower quiescent current is beneficial for battery-powered applications.

Q: Are all substitute parts ROHS3 compliant?

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

Q: What is the significance of MSL-3 rating on RT9193-30GB?

A: RT9193-30GB carries Moisture Sensitivity Level MSL-3 (168 Hours), while other parts are MSL-1 (Unlimited). MSL-3 requires moisture control during storage and handling with a maximum floor life of 168 hours after bag opening. This may impact supply chain logistics compared to MSL-1 parts with unlimited floor life.

Q: Which substitute part has the highest inventory availability?

A: Both MIC5319-3.0YD5-TR and RT9193-30GB have the highest inventory at 20100 units each, compared to 4400 units for TPS73630DBVR and 3402 units for MIC5305-3.0YD5-TR.

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