TPS73615DCQ Equivalent & Substitute Parts

Part Overview

The TPS73615DCQ is a linear voltage regulator IC from Texas Instruments designed for positive fixed 1.5V output at 400mA in SOT-223-6 surface mount packaging. This device is classified as Last Time Buy, indicating end-of-life status and limited availability. Finding equivalent substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term production requirements for applications utilizing this regulator.

Substiute Parts

TPS73615DCQ

Texas InstrumentsIn Stock: 998TPS73615DCQ Datasheet

Current PartRFQ

TLV75515PDBVR

Texas InstrumentsIn Stock: 6268TLV75515PDBVR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TPS73615DCQ is determined by the following critical parameters:

• Fixed output voltage of 1.5V
• Output current capability of 400mA or greater
• Maximum input voltage of 5.5V or greater
• Surface mount technology with compatible pinout
• Operating temperature range of -40°C to 125°C or wider
• RoHS3 compliance and REACH unaffected status

The TLV75515PDBVR meets these substitution criteria through equivalent output voltage, higher output current capability (500mA), matching input voltage specification, compatible surface mount packaging, and identical compliance certifications. Package differences (SOT-223-6 to SOT-23-5) require PCB layout modification but do not affect electrical functionality.

Parameter Comparison

Engineering Selection Recommendations

The TLV75515PDBVR is a direct functional substitute for the TPS73615DCQ based on product status and compliance alignment. The TPS73615DCQ's Last Time Buy status makes the active-status TLV75515PDBVR the appropriate long-term alternative. Both devices maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory continuity.

The TLV75515PDBVR provides superior quiescent current performance (31 µA versus 550 µA), resulting in lower standby power consumption. The higher output current rating (500mA versus 400mA) provides additional design margin for applications operating at or near the original 400mA specification.

Package transition from SOT-223-6 to SOT-23-5 requires PCB layout redesign. The SOT-23-5 package is smaller and more compact, potentially enabling space optimization in revised designs. Voltage dropout increases from 0.2V to 0.425V at rated current; thermal and input voltage margin analysis is required for applications with tight input voltage specifications.

Frequently Asked Questions (FAQ)

Q: Can the TLV75515PDBVR directly replace the TPS73615DCQ without PCB modification?

A: No. The TPS73615DCQ uses SOT-223-6 packaging while the TLV75515PDBVR uses SOT-23-5 packaging. Pinout and footprint differences require PCB layout redesign. However, electrical functionality is compatible.

Q: What is the impact of the increased voltage dropout in the TLV75515PDBVR?

A: The TLV75515PDBVR has a maximum dropout of 0.425V at 500mA compared to 0.2V at 400mA for the TPS73615DCQ. For applications with input voltages near the 5.5V maximum, verify that the higher dropout does not compromise output voltage regulation or system performance.

Q: Does the TLV75515PDBVR meet the same compliance requirements?

A: Yes. Both devices are ROHS3 compliant and REACH unaffected, maintaining identical regulatory status.

Q: Why is the quiescent current significantly lower in the TLV75515PDBVR?

A: The TLV75515PDBVR incorporates more advanced power management circuitry, reducing standby current from 550 µA to 31 µA. This is a performance improvement for battery-powered or low-power applications.

Q: Is the higher output current of the TLV75515PDBVR (500mA vs 400mA) a concern?

A: No. Higher output current capability provides additional design margin and does not negatively impact applications designed for 400mA operation. The device will not exceed the required current unless the application demands it.