TPS79516DCQ Equivalent & Substitute Parts

Part Overview

The TPS79516DCQ is a linear voltage regulator IC from Texas Instruments designed for positive fixed output applications. It delivers 500mA output current with a fixed 1.6V output and operates across an input range up to 5.5V. The device integrates protection features including over-current, over-temperature, reverse polarity, and under-voltage lockout (UVLO) protection. Currently in Last Time Buy status, this part requires identification of suitable alternatives for ongoing design support and procurement continuity.

Substiute Parts

TPS79516DCQ

Texas InstrumentsIn Stock: 2271TPS79516DCQ Datasheet

Current PartRFQ

TLV75801PDBVR

Texas InstrumentsIn Stock: 52276TLV75801PDBVR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TPS79516DCQ is determined by the following critical parameters:

• Output Current Rating: Minimum 500mA to maintain system performance
• Output Configuration: Positive output topology
• Operating Temperature Range: -40°C to 125°C minimum
• Regulatory Compliance: ROHS3 and REACH compliance required
• Mounting Type: Surface mount technology
• Protection Features: Over-current, over-temperature, and UVLO protection

The TLV75801PDBVR qualifies as a functional substitute based on matching output current capability (500mA), positive output configuration, identical operating temperature range, and equivalent protection feature set. While the TLV75801PDBVR features adjustable output voltage (0.55V to 5.5V) compared to the fixed 1.6V output of the TPS79516DCQ, it can be configured to deliver the required 1.6V output through external resistor networks. The package form factor differs (SOT-23-5 versus SOT-223-6), requiring PCB layout modification.

Parameter Comparison

Engineering Selection Recommendations

The TLV75801PDBVR is an active product with extended availability, addressing the Last Time Buy status of the TPS79516DCQ. Both devices maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements. The TLV75801PDBVR offers superior quiescent current performance (35 µA versus 385 µA), reducing standby power consumption in battery-powered applications. The improved moisture sensitivity level (MSL 1 versus MSL 2) provides extended shelf life without moisture bake-out requirements.

Design migration requires external resistor configuration on the TLV75801PDBVR to establish the 1.6V fixed output and PCB layout adjustment for the smaller SOT-23-5 package footprint. The TLV75801PDBVR's higher maximum input voltage (6V versus 5.5V) provides additional input margin.

Frequently Asked Questions (FAQ)

Q: Can the TLV75801PDBVR directly replace the TPS79516DCQ without circuit modification?

A: No. The TLV75801PDBVR requires external resistor divider configuration to set the 1.6V output voltage. The TPS79516DCQ provides fixed 1.6V output without external components. PCB layout modification is necessary due to package differences (SOT-23-5 versus SOT-223-6).

Q: What are the key electrical differences between these devices?

A: The primary differences are output type (fixed versus adjustable), quiescent current (385 µA versus 35 µA), and maximum input voltage (5.5V versus 6V). Both maintain 500mA output current and identical operating temperature range.

Q: Are both devices compliant with environmental and regulatory standards?

A: Yes. Both the TPS79516DCQ and TLV75801PDBVR are ROHS3 compliant and REACH unaffected, meeting current environmental regulations.

Q: How does the package change affect PCB design?

A: The TPS79516DCQ uses SOT-223-6 packaging while the TLV75801PDBVR uses SOT-23-5. The SOT-23-5 package is smaller, requiring PCB footprint redesign and potential routing adjustments. Pin assignments differ between packages.

Q: What is the impact of the quiescent current difference?

A: The TLV75801PDBVR's lower quiescent current (35 µA) reduces standby power consumption by approximately 91% compared to the TPS79516DCQ (385 µA), beneficial for battery-powered or low-power standby applications.

Q: Does the TLV75801PDBVR provide reverse polarity protection?

A: The TLV75801PDBVR provides over-current, over-temperature, and UVLO protection. Reverse polarity protection is not listed in the provided specifications. The TPS79516DCQ explicitly includes reverse polarity protection.