TLV75518PDBVR Equivalent & Substitute Parts

Part Overview

The TLV75518PDBVR is a linear voltage regulator IC manufactured by Texas Instruments, designed for positive fixed output applications. This active product delivers 1.8V at 500mA output with a maximum dropout voltage of 0.4V, housed in a SOT-23-5 surface mount package. The device includes enable control and protection features for over-current and over-temperature conditions, making it suitable for low-power supply applications requiring stable voltage regulation.

Substitute parts become necessary when the primary component faces inventory constraints, extended lead times, or when design flexibility permits alternative voltage outputs or package configurations while maintaining functional compatibility within system requirements.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Output Voltage (Fixed)	1.8V
Output Current	500mA
Input Voltage (Max)	5.5V
Dropout Voltage (Max)	0.4V @ 500mA
Quiescent Current	31 µA
Package Type	SOT-23-5
Operating Temperature	-40°C ~ 125°C
Protection Features	Over Current, Over Temperature
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the TLV75518PDBVR is determined by the following critical parameters:

Output Current Capability: Minimum 500mA required for direct substitution
Input Voltage Range: Maximum 5.5V or higher to accommodate input specifications
Package Compatibility: SOT-23-5 or equivalent surface mount packages
Protection Features: Over-current and over-temperature protection mandatory
Output Configuration: Positive fixed output only
RoHS Compliance: ROHS3 Compliant status required

The three substitute parts listed meet these core criteria with variations in output voltage levels (0.9V, 1.0V, 1.2V), quiescent current performance, and package form factors. Each substitute maintains the 500mA output current capability and positive fixed output configuration, with all parts offering active product status and ROHS3 compliance.

Parameter Comparison

Parameter	TLV75518PDBVR	RT9013-12GB	RT9078-10GJ5	RT9081A-09GQZA(2)
Manufacturer	Texas Instruments	Richtek USA Inc.	Richtek USA Inc.	Richtek USA Inc.
Output Voltage (Fixed)	1.8V	1.2V	1.0V	0.9V
Output Current	500mA	500mA	300mA	500mA
Input Voltage (Max)	5.5V	5.5V	5.5V	5.5V
Dropout Voltage (Max)	0.4V @ 500mA	0.4V @ 500mA	0.96V @ 300mA	0.25V @ 500mA
Quiescent Current	31 µA	50 µA	4 µA	110 µA
Package Type	SOT-23-5	SOT-23-5	TSOT-23-5	6-ZADFN (1.2x1.2)
Operating Temperature	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 85°C
Protection Features	Over Current, Over Temperature	Over Current, Over Temperature	Over Current, Over Temperature	Current Limit, Thermal Shutdown, UVLO
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

All substitute parts maintain active product status and ROHS3 compliance, ensuring regulatory alignment with the original TLV75518PDBVR specification.

RT9013-12GB provides the closest functional match with identical 500mA output current and 0.4V dropout voltage at rated current. This part operates within a reduced temperature range (-40°C ~ 85°C) compared to the original specification. Package compatibility remains at SOT-23-5 level.

RT9078-10GJ5 offers the lowest quiescent current at 4 µA, beneficial for battery-powered applications. However, output current is limited to 300mA, making this part suitable only for applications not requiring the full 500mA capability. Operating temperature range matches the original at -40°C ~ 125°C. Package form factor is TSOT-23-5 (thin variant).

RT9081A-09GQZA(2) delivers the lowest dropout voltage at 0.25V @ 500mA and includes additional protection features (UVLO). This part maintains 500mA output current capability but operates within a reduced temperature range (-40°C ~ 85°C). Package configuration changes to 6-ZADFN, requiring PCB layout modification.

Frequently Asked Questions (FAQ)

Q: Can RT9078-10GJ5 directly replace TLV75518PDBVR in all applications?

A: No. The RT9078-10GJ5 is limited to 300mA output current versus the 500mA requirement of the original part. Substitution is valid only for applications drawing less than 300mA from the regulator output.

Q: What are the package compatibility considerations?

A: TLV75518PDBVR and RT9013-12GB both use SOT-23-5 packages with identical pinouts, allowing direct PCB substitution. RT9078-10GJ5 uses TSOT-23-5 (thin variant), which may fit SOT-23-5 footprints but requires verification. RT9081A-09GQZA(2) uses 6-ZADFN package, requiring complete PCB layout redesign.

Q: How do output voltage differences affect substitution?

A: Output voltage selection depends on downstream circuit requirements. The TLV75518PDBVR provides 1.8V; substitutes offer 1.2V, 1.0V, or 0.9V. Substitution is valid only when the application circuit is designed to operate at the substitute part's output voltage level.

Q: Which substitute offers the best thermal performance?

A: RT9081A-09GQZA(2) provides the lowest dropout voltage at 0.25V @ 500mA, resulting in minimal heat dissipation. However, operating temperature range is limited to -40°C ~ 85°C versus the original -40°C ~ 125°C specification.

Q: Are all substitutes suitable for high-temperature applications?

A: TLV75518PDBVR and RT9078-10GJ5 both support -40°C ~ 125°C operating range. RT9013-12GB and RT9081A-09GQZA(2) are limited to -40°C ~ 85°C, making them unsuitable for applications requiring operation above 85°C.

Q: What is the quiescent current impact of each substitute?

A: Original part draws 31 µA. RT9013-12GB draws 50 µA (61% higher), RT9078-10GJ5 draws 4 µA (87% lower), and RT9081A-09GQZA(2) draws 110 µA (255% higher). Selection depends on standby power consumption requirements.

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