TPS70918DBVR Equivalent & Substitute Parts

Part Overview

The TPS70918DBVR is a linear voltage regulator IC from Texas Instruments designed for positive fixed 1.8V output at 150mA in a SOT-23-5 surface mount package. This active product operates across -40°C to 125°C and includes comprehensive protection features including over current, over temperature, reverse current, and under voltage lockout (UVLO). The device is currently in stock with 4400 units available in Cut Tape and Digi-Reel packaging. Equivalent and substitute parts are identified based on matching electrical specifications, output configuration, and mechanical compatibility within the same package class.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	1.8V
Output Current	150mA
Input Voltage (Max)	30V
Output Configuration	Positive Fixed
Package / Case	SC-74A, SOT-753 (SOT-23-5)
Mounting Type	Surface Mount
Operating Temperature Range	-40°C to 125°C
Protection Features	Over Current, Over Temperature, Reverse Current, UVLO
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the TPS70918DBVR is determined by the following critical parameters: fixed 1.8V output voltage, 150mA output current capability, positive output configuration, SOT-23-5 package compatibility, and surface mount mounting type. All identified substitutes maintain these core electrical and mechanical specifications. Packaging format differences (Cut Tape vs. Tape & Reel) do not affect functional equivalence. The TPS70918DBVT and TPS70918QDBVRQ1 are parametric equivalents from Texas Instruments with identical electrical performance. The LD39015M18R from STMicroelectronics is a manufacturer-recommended alternative that meets the same output specifications and package requirements, though with different input voltage maximum and quiescent current characteristics.

Parameter Comparison

Parameter	TPS70918DBVR	TPS70918DBVT	TPS70918QDBVRQ1	LD39015M18R
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	STMicroelectronics
Output Voltage (Fixed)	1.8V	1.8V	1.8V	1.8V
Output Current	150mA	150mA	150mA	150mA
Input Voltage (Max)	30V	30V	30V	5.5V
Output Configuration	Positive Fixed	Positive Fixed	Positive Fixed	Positive Fixed
Quiescent Current (Iq)	2.05 µA	2.05 µA	2.05 µA	50 µA
Package / Case	SC-74A, SOT-753	SC-74A, SOT-753	SC-74A, SOT-753	SC-74A, SOT-753
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C
Product Status	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Automotive Grade	Standard	Standard	AEC-Q100	Standard

Engineering Selection Recommendations

The TPS70918DBVT serves as a direct parametric equivalent to the TPS70918DBVR with identical electrical specifications and differs only in packaging format (Tape & Reel vs. Cut Tape). Both are active products from Texas Instruments with ROHS3 compliance and unlimited moisture sensitivity level rating.

The TPS70918QDBVRQ1 is an automotive-qualified variant (AEC-Q100) of the TPS70918 series, maintaining identical electrical performance while meeting automotive industry standards. This part is suitable for applications requiring automotive-grade components.

The LD39015M18R from STMicroelectronics is a manufacturer-recommended substitute that delivers the same 1.8V fixed output at 150mA in the identical SOT-23-5 package. However, this device has a maximum input voltage of 5.5V compared to 30V for the TPS70918 series, and exhibits higher quiescent current (50 µA vs. 2.05 µA). Selection of the LD39015M18R requires verification that the application input voltage does not exceed 5.5V and that the higher quiescent current is acceptable for the intended use case.

Frequently Asked Questions (FAQ)

Q: Can TPS70918DBVT replace TPS70918DBVR directly? A: Yes. The TPS70918DBVT is a parametric equivalent with identical electrical specifications. The only difference is packaging format: TPS70918DBVR is supplied in Cut Tape and Digi-Reel, while TPS70918DBVT is supplied in Tape & Reel. Both are suitable for the same circuit applications.

Q: What is the difference between TPS70918DBVR and TPS70918QDBVRQ1? A: The TPS70918QDBVRQ1 is automotive-qualified to AEC-Q100 standard, making it suitable for automotive applications. Electrical specifications are identical. Standard TPS70918DBVR is appropriate for non-automotive applications.

Q: Can LD39015M18R be used as a substitute in all applications? A: The LD39015M18R matches the 1.8V output, 150mA current, and SOT-23-5 package. However, its maximum input voltage is limited to 5.5V versus 30V for TPS70918 devices. Applications with input voltages exceeding 5.5V cannot use the LD39015M18R. Additionally, the higher quiescent current (50 µA vs. 2.05 µA) may impact battery-powered or ultra-low-power applications.

Q: Are all substitute parts RoHS compliant? A: Yes. All listed substitutes—TPS70918DBVT, TPS70918QDBVRQ1, and LD39015M18R—are ROHS3 compliant.

Q: Do packaging differences affect circuit compatibility? A: No. Cut Tape (CT), Digi-Reel, and Tape & Reel packaging formats contain identical components. Packaging differences affect only procurement and handling; the electrical and mechanical specifications of the IC itself remain unchanged.

Q: What protection features are included in these regulators? A: TPS70918 series devices include over current, over temperature, reverse current, and under voltage lockout (UVLO) protection. The LD39015M18R includes over current and over temperature protection.

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