TPS73047DBVR Equivalent & Substitute Parts

Part Overview

The TPS73047DBVR is a linear voltage regulator IC from Texas Instruments designed for positive fixed output applications. It delivers 200mA output current with a fixed 4.7V output and operates across an input range up to 5.5V. The device integrates protection features including over-current, over-temperature, reverse polarity, and under-voltage lockout (UVLO) protection. Currently marked as Last Time Buy, alternative components are necessary for new designs and long-term supply assurance.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Package / Case	SC-74A, SOT-753 (SOT-23-5)
Output Configuration	Positive
Output Type	Fixed
Voltage - Output (Fixed)	4.7V
Voltage - Input (Max)	5.5V
Current - Output	200mA
Voltage Dropout (Max)	0.21V @ 200mA
Operating Temperature	-40°C ~ 125°C
RoHS Status	ROHS3 Compliant
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution for the TPS73047DBVR is determined by the following critical parameters:

Parametric Equivalents maintain identical electrical specifications: fixed 4.7V output, 200mA current capacity, 5.5V maximum input voltage, 0.21V dropout voltage, and SOT-23-5 package compatibility. These parts are pin-compatible and functionally interchangeable without circuit modification.

Manufacturer Recommended Alternatives provide functional substitution through adjustable output voltage capability and higher current ratings. While output type differs (adjustable vs. fixed), these parts operate within compatible voltage ranges and package formats, requiring output voltage configuration during implementation.

Key Substitution Criteria:

Package compatibility: SOT-23-5 (SC-74A, SOT-753)
Output configuration: Positive
Maximum input voltage: 5.5V or higher
Minimum output current: 200mA or greater
Operating temperature range: -40°C ~ 125°C
Surface mount technology
RoHS3 compliance

Parameter Comparison

Parameter	TPS73047DBVR (Main)	TPS73047DBVT	TPS78401DBVR	LDK120M-R
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	STMicroelectronics
Product Status	Last Time Buy	Obsolete	Active	Active
Output Type	Fixed (4.7V)	Fixed (4.7V)	Adjustable (1.2V - 5.5V)	Adjustable (0.8V - 5.2V)
Current - Output	200mA	200mA	300mA	200mA
Voltage - Input (Max)	5.5V	5.5V	6V	5.5V
Voltage Dropout (Max)	0.21V @ 200mA	0.21V @ 200mA	0.3V @ 300mA	0.3V @ 200mA
Current - Quiescent (Iq)	250 µA	250 µA	35 µA	60 µA
Package / Case	SC-74A, SOT-753	SC-74A, SOT-753	SC-74A, SOT-753	SC-74A, SOT-753
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount

Engineering Selection Recommendations

TPS73047DBVT is the direct parametric equivalent, maintaining identical electrical performance and fixed 4.7V output. However, this part is marked Obsolete, making it unsuitable for new designs requiring long-term component availability.

TPS78401DBVR is the manufacturer-recommended active alternative from Texas Instruments. It provides higher output current capacity (300mA vs. 200mA) and lower quiescent current (35 µA vs. 250 µA), offering improved efficiency. The adjustable output voltage requires external resistor configuration to set 4.7V output. This part is currently Active with robust inventory availability.

LDK120M-R from STMicroelectronics is an active alternative offering adjustable output voltage (0.8V - 5.2V) and equivalent 200mA current capacity. It features lower quiescent current (60 µA) compared to the main part. Output voltage configuration via external resistors is required. This part maintains SOT-23-5 package compatibility and ROHS3 compliance.

For new designs, TPS78401DBVR is preferred due to Active product status, higher current capability, and improved power efficiency. LDK120M-R provides a cross-manufacturer alternative with equivalent current handling and lower standby power consumption.

Frequently Asked Questions (FAQ)

Q: Can TPS73047DBVT be used as a direct replacement for TPS73047DBVR?

A: TPS73047DBVT is electrically and functionally identical to TPS73047DBVR with the same fixed 4.7V output, 200mA current, and SOT-23-5 package. However, TPS73047DBVT is marked Obsolete, limiting its suitability for production designs requiring sustained component supply.

Q: What is the primary difference between fixed and adjustable output regulators in this comparison?

A: Fixed output regulators (TPS73047DBVR, TPS73047DBVT) deliver a preset 4.7V output without external configuration. Adjustable output regulators (TPS78401DBVR, LDK120M-R) require external resistor networks to set the desired output voltage. For 4.7V applications, adjustable regulators must be configured accordingly.

Q: Is TPS78401DBVR pin-compatible with TPS73047DBVR?

A: Both devices use the SOT-23-5 package (SC-74A, SOT-753) with identical pinout. TPS78401DBVR is pin-compatible and can replace TPS73047DBVR with circuit modifications limited to output voltage setting resistors.

Q: What are the key advantages of LDK120M-R over TPS73047DBVR?

A: LDK120M-R offers lower quiescent current (60 µA vs. 250 µA), reducing standby power consumption. It maintains equivalent 200mA output current and SOT-23-5 package compatibility. As an active product from STMicroelectronics, it provides cross-manufacturer supply diversity.

Q: Can these substitutes handle the same input voltage range?

A: TPS73047DBVR, TPS73047DBVT, and LDK120M-R all accept maximum input voltage of 5.5V. TPS78401DBVR accepts up to 6V, providing slightly higher input voltage tolerance.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. TPS73047DBVR, TPS73047DBVT, TPS78401DBVR, and LDK120M-R are all ROHS3 Compliant with REACH Unaffected status.

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