TPS75315QPWPREP Equivalent & Substitute Parts

Part Overview

The TPS75315QPWPREP is a linear voltage regulator IC from Texas Instruments designed for positive fixed output applications. It delivers 1.5A output current with a fixed 1.5V output and operates across an input range up to 5V. The device integrates protection features including over-current, over-temperature, and reverse polarity protection, along with control features such as enable, power good, and reset output functions.

The TPS75315QPWPREP is classified as obsolete. Identifying suitable substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term product availability for applications currently using this regulator.

Substiute Parts

TPS75315QPWPREP

Texas InstrumentsIn Stock: 1004TPS75315QPWPREP Datasheet

Current PartRFQ

TPS75215QPWPR

Texas InstrumentsIn Stock: 3067TPS75215QPWPR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TPS75315QPWPREP is determined by the following critical parameters:

• Output Voltage (Fixed): Must remain 1.5V to maintain circuit compatibility
• Output Configuration: Must be positive fixed output
• Package / Case: Must be 20-PowerTSSOP to ensure PCB footprint compatibility
• Control Features: Must include Enable, Power Good, and Reset Output functions
• Protection Features: Must include Over Current, Over Temperature, and Reverse Polarity protection
• Operating Temperature Range: Must support -40°C ~ 125°C
• Mounting Type: Must be Surface Mount
• Compliance: Must maintain ROHS3 compliance and MSL 2 rating

The TPS75215QPWPR qualifies as a manufacturer-recommended substitute. While it increases output current capability to 2A and maximum input voltage to 5.5V, these enhancements are compatible with applications designed for the TPS75315QPWPREP, as they represent improved specifications within the same functional category and package.

Parameter Comparison

Engineering Selection Recommendations

The TPS75215QPWPR is the manufacturer-recommended substitute for the obsolete TPS75315QPWPREP. Selection of this substitute is supported by the following factors:

• Product Status: The TPS75215QPWPR maintains active product status, ensuring ongoing availability and supply chain support compared to the obsolete TPS75315QPWPREP.
• Compliance Alignment: Both devices maintain identical ROHS3 compliance and MSL 2 ratings, ensuring regulatory and environmental compatibility.
• Functional Equivalence: The substitute retains all critical control and protection features, identical output voltage, and matching package specifications.
• Enhanced Specifications: The TPS75215QPWPR provides increased output current (2A vs. 1.5A) and higher maximum input voltage (5.5V vs. 5V), representing specification improvements that do not compromise backward compatibility.
• Inventory Availability: The TPS75215QPWPR is available in significantly higher quantities (3048 Pcs) compared to the obsolete part, supporting production continuity.

Frequently Asked Questions (FAQ)

Q: Can the TPS75215QPWPR directly replace the TPS75315QPWPREP without PCB modifications?

A: Yes. Both devices use the identical 20-PowerTSSOP package with matching pinout and footprint dimensions (0.173", 4.40mm Width). No PCB layout changes are required for mechanical or electrical integration.

Q: What is the impact of the increased output current rating (2A vs. 1.5A)?

A: The TPS75215QPWPR's higher current rating is a specification enhancement. Applications designed for 1.5A operation will function within the substitute's rated capability. Thermal management and PCB trace sizing should be evaluated based on actual application current draw, not the device rating.

Q: Are there differences in control or protection functionality?

A: No. Both devices provide identical control features (Enable, Power Good, Reset Output) and protection features (Over Current, Over Temperature, Reverse Polarity). Functional behavior in these areas is equivalent.

Q: What is the significance of the PSRR difference (63dB vs. 60dB)?

A: The 3dB difference in Power Supply Rejection Ratio at 100Hz is marginal. Both devices provide adequate noise rejection for typical 1.5V regulated output applications. This difference does not affect functional compatibility.

Q: Does the increased maximum input voltage (5.5V vs. 5V) affect circuit design?

A: No. The higher input voltage rating of the TPS75215QPWPR is a specification enhancement. Applications operating at or below 5V input will function identically. The substitute provides additional margin for input voltage variations.

Q: Are compliance certifications identical between the two devices?

A: Yes. Both the TPS75315QPWPREP and TPS75215QPWPR maintain ROHS3 compliance, identical MSL 2 ratings, and equivalent environmental certifications. No compliance-related design changes are necessary.

Q: What is the recommended approach for design transition?

A: Update component specifications to the TPS75215QPWPR part number. Verify that application current requirements do not exceed 2A and input voltage does not exceed 5.5V. No circuit topology or PCB layout modifications are required. Thermal analysis should be performed based on actual application operating conditions.