TPS73018DBVRG4 Equivalent & Substitute Parts

Part Overview

The TPS73018DBVRG4 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 1.8V output at 200mA in a SOT-23-5 surface mount package. This part is discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and procurement. The device provides regulated power with integrated protection features including over-current, over-temperature, reverse polarity, and under-voltage lockout (UVLO) protection.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	1.8V
Output Current	200mA
Input Voltage (Max)	5.5V
Voltage Dropout (Max)	0.21V @ 200mA
Quiescent Current	250 µA
PSRR	68dB (100Hz)
Package	SOT-23-5 (SC-74A)
Operating Temperature	-40°C to 125°C
Protection Features	Over Current, Over Temperature, Reverse Polarity, UVLO

Substitute Part Grouping Explanation

Substitution for the TPS73018DBVRG4 is determined by the following critical parameters: fixed 1.8V output voltage, 200mA minimum output current capability, 5.5V maximum input voltage, SOT-23-5 package compatibility, and identical protection feature set. Parts are grouped into two categories:

Parametric Equivalents maintain identical electrical specifications and are direct replacements with no design modifications required.

Manufacturer Recommended Alternatives provide higher output current capability or enhanced performance characteristics while maintaining the core 1.8V output, SOT-23-5 package, and protection features. These parts require verification of current requirements in the application but are functionally compatible.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Input Voltage (Max)	Quiescent Current	Package	Product Status	Inventory
TPS73018DBVRG4	Texas Instruments	1.8V	200mA	5.5V	250 µA	SOT-23-5	Discontinued	4100 Pcs
TPS73018DBVR	Texas Instruments	1.8V	200mA	5.5V	250 µA	SOT-23-5	Active	15330 Pcs
TPS73018DBVT	Texas Instruments	1.8V	200mA	5.5V	250 µA	SOT-23-5	Active	36400 Pcs
TPS79318DBVREP	Texas Instruments	1.8V	200mA	5.5V	220 µA	SOT-23-5	Active	9982 Pcs
TPS79318DBVRQ1	Texas Instruments	1.8V	200mA	5.5V	220 µA	SOT-23-5	Active	6992 Pcs
TPS79318DBVRG4Q1	Texas Instruments	1.8V	200mA	5.5V	220 µA	SOT-23-5	Last Time Buy	9208 Pcs
MIC5319-1.8YD5-TR	Microchip Technology	1.8V	500mA	5.5V	150 µA	TSOT-23-5	Active	1686 Pcs
RT9193-18GB	Richtek USA Inc.	1.8V	300mA	5.5V	130 µA	SOT-23-5	Active	105300 Pcs

Engineering Selection Recommendations

Direct Replacements (No Design Changes Required):

TPS73018DBVR and TPS73018DBVT are parametric equivalents manufactured by Texas Instruments with identical electrical specifications to the TPS73018DBVRG4. Both parts are in active production status with higher inventory availability. TPS73018DBVT offers the highest stock level at 36400 units.

TPS79318DBVREP and TPS79318DBVRQ1 are Texas Instruments alternatives with marginally lower quiescent current (220 µA vs. 250 µA) and enhanced PSRR performance. TPS79318DBVRQ1 includes AEC-Q100 automotive qualification. Both maintain 200mA output current and are in active production.

Higher Current Alternatives (Design Verification Required):

MIC5319-1.8YD5-TR from Microchip Technology provides 500mA output current in a TSOT-23-5 package with lower quiescent current (150 µA). This part is suitable for applications requiring higher current headroom while maintaining the 1.8V output and SOT-23-5 form factor.

RT9193-18GB from Richtek USA Inc. provides 300mA output current with the lowest quiescent current (130 µA) and highest inventory availability (105300 units). This part is recommended for applications where current margin above 200mA is beneficial.

Frequently Asked Questions (FAQ)

Q: Can I use TPS79318DBVRQ1 as a direct replacement for TPS73018DBVRG4?

A: Yes. Both parts provide 1.8V fixed output at 200mA in SOT-23-5 packages with identical protection features. The TPS79318DBVRQ1 has slightly lower quiescent current and includes AEC-Q100 automotive qualification, making it a compatible substitute.

Q: What is the difference between TPS73018DBVR and TPS73018DBVT?

A: Both are parametric equivalents with identical electrical specifications. The difference is packaging format: TPS73018DBVR is supplied in Cut Tape and Digi-Reel, while TPS73018DBVT is also supplied in Cut Tape and Digi-Reel. TPS73018DBVT has significantly higher inventory availability.

Q: Can I use MIC5319-1.8YD5-TR or RT9193-18GB if my application only requires 200mA?

A: Yes. Both parts are rated for higher output currents (500mA and 300mA respectively) and will operate correctly in applications requiring 200mA or less. The higher current rating provides design margin. Verify that the TSOT-23-5 package for MIC5319-1.8YD5-TR is compatible with your PCB layout, as it differs slightly from standard SOT-23-5.

Q: Why is TPS79318DBVRG4Q1 listed as Last Time Buy?

A: Last Time Buy status indicates the manufacturer is discontinuing this part number. Existing inventory is available, but no future production is planned. For new designs, select from parts with Active status such as TPS79318DBVRQ1 or TPS73018DBVT.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts are RoHS3 compliant and REACH unaffected, matching the compliance status of the TPS73018DBVRG4.

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