TPS77018DBVT Equivalent & Substitute Parts

Part Overview

The TPS77018DBVT is a linear voltage regulator IC from Texas Instruments, delivering a fixed 1.8V output at 50mA in a SOT-23-5 surface mount package. This part is classified as obsolete, making substitute components necessary for new designs and ongoing production requirements. The device features enable control, over-current protection, over-temperature protection, and reverse polarity protection, operating across the industrial temperature range of -40°C to 125°C.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Output Voltage (Fixed)	1.8V
Output Current	50mA
Input Voltage (Max)	10V
Quiescent Current	28 µA
PSRR	60dB (1kHz)
Package	SOT-23-5 (SC-74A)
Operating Temperature	-40°C to 125°C
Control Features	Enable
Protection Features	Over Current, Over Temperature, Reverse Polarity
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the TPS77018DBVT is determined by the following critical parameters: fixed output voltage of 1.8V, surface mount SOT-23-5 package compatibility, positive output configuration, enable control feature, and compliance certifications (ROHS3, REACH Unaffected). Output current capacity, quiescent current, PSRR performance, and maximum input voltage are secondary parameters that define substitution categories.

Substitute parts are grouped into three categories:

Category 1: Parametric Equivalents (Identical Specifications) Parts with matching 50mA output current, 10V maximum input voltage, 28 µA quiescent current, and identical protection features. These provide direct replacement capability.

Category 2: Manufacturer Recommended Upgrades (Enhanced Performance) Parts with higher output current capacity (150mA–200mA) while maintaining 1.8V fixed output, SOT-23-5 package, and enable control. These support higher load requirements with improved performance metrics.

Category 3: Cross-Manufacturer Alternatives (Different Package Variants) Parts from alternative manufacturers (ABLIC Inc., Torex Semiconductor Ltd) with 1.8V fixed output and SOT-23-5 or SOT-25-5 packages, offering different quiescent current and PSRR characteristics.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Input Voltage (Max)	Quiescent Current	PSRR (1kHz)	Package	Status
TPS77018DBVT	Texas Instruments	1.8V	50mA	10V	28 µA	60dB	SOT-23-5	Obsolete
TPS77018DBVR	Texas Instruments	1.8V	50mA	10V	28 µA	60dB	SOT-23-5	Active
TPS79018DBVR	Texas Instruments	1.8V	50mA	10V	28 µA	85dB	SOT-23-5	Active
TPS79018DBVT	Texas Instruments	1.8V	50mA	10V	28 µA	85dB	SOT-23-5	Active
TPS7A2418DBVR	Texas Instruments	1.8V	200mA	18V	4.5 µA	75dB ~ 62dB	SOT-23-5	Active
S-1200B18-M5T1U	ABLIC Inc.	1.8V	150mA	10V	1 µA	70dB	SOT-23-5	Active
S-L2980A18MC-TF-U	ABLIC Inc.	1.8V	150mA	10V	1 µA	70dB	SOT-23-5	Active
XC6204B182MR-G	Torex Semiconductor Ltd	1.8V	150mA	10V	120 µA	70dB	SOT-25-5	Active
XC6209B182MR-G	Torex Semiconductor Ltd	1.8V	150mA	10V	50 µA	70dB	SOT-25-5	Active
XC6209F182MR-G	Torex Semiconductor Ltd	1.8V	300mA	10V	50 µA	70dB	SOT-25-5	Active

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): TPS77018DBVR, TPS79018DBVR, and TPS79018DBVT are active-status alternatives from Texas Instruments with identical electrical specifications to the obsolete TPS77018DBVT. TPS79018DBVR and TPS79018DBVT offer improved PSRR performance (85dB versus 60dB) while maintaining all other parameters. All three parts are ROHS3 compliant and REACH unaffected, meeting the same compliance requirements as the original part.

For Enhanced Current Capacity: TPS7A2418DBVR supports 200mA output current with reduced quiescent current (4.5 µA) and higher maximum input voltage (18V). This part is suitable for applications requiring higher load capacity while maintaining the same 1.8V output and SOT-23-5 package footprint. Product status is active with full compliance certifications.

For Cross-Manufacturer Alternatives: ABLIC Inc. parts (S-1200B18-M5T1U, S-L2980A18MC-TF-U) provide 150mA output current with significantly lower quiescent current (1 µA) in SOT-23-5 packages. These are active products with ROHS3 compliance. Torex Semiconductor Ltd parts (XC6204B182MR-G, XC6209B182MR-G, XC6209F182MR-G) offer 150mA to 300mA output current in SOT-25-5 packages, requiring PCB layout adjustment but providing active product status and full compliance.

Frequently Asked Questions (FAQ)

Q: Can TPS77018DBVR directly replace TPS77018DBVT? A: Yes. TPS77018DBVR is a parametric equivalent with identical output voltage (1.8V), output current (50mA), input voltage rating (10V), quiescent current (28 µA), and package (SOT-23-5). The primary difference is packaging format (Cut Tape & Digi-Reel versus Tape & Reel) and active product status versus obsolete status.

Q: What is the difference between TPS79018DBVR and TPS77018DBVT? A: Both deliver 1.8V at 50mA in SOT-23-5 packages with identical quiescent current (28 µA). TPS79018DBVR offers superior PSRR performance (85dB versus 60dB at 1kHz) and is an active product. All other electrical and mechanical specifications remain identical.

Q: Can I use TPS7A2418DBVR if my application only requires 50mA? A: Yes. TPS7A2418DBVR is rated for 200mA output current, so it operates safely at 50mA loads. The part offers lower quiescent current (4.5 µA versus 28 µA) and higher maximum input voltage (18V versus 10V), providing additional design margin. The SOT-23-5 package footprint is identical.

Q: What is the package difference between SOT-23-5 and SOT-25-5? A: SOT-23-5 (SC-74A) and SOT-25-5 (SC-74A) are both five-pin surface mount packages with different physical dimensions and pin spacing. SOT-25-5 is slightly larger. PCB layout and footprint must be verified before substituting Torex parts (XC6204, XC6209 series) which use SOT-25-5 packaging.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All substitute parts listed are ROHS3 compliant and REACH unaffected, matching the compliance status of the original TPS77018DBVT.

Q: Which substitute offers the lowest quiescent current? A: ABLIC Inc. parts (S-1200B18-M5T1U and S-L2980A18MC-TF-U) offer the lowest quiescent current at 1 µA, compared to 28 µA for the original part. These are beneficial for battery-powered or low-power standby applications.

Q: Can I use a higher current-rated part in a 50mA application? A: Yes. Parts rated for 150mA or 200mA output current operate safely at lower loads. Higher current ratings do not affect voltage regulation accuracy or output voltage stability at reduced load currents.

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