TPS7350QDR Linear Voltage Regulator

Part Overview

The TPS7350QDR is a linear voltage regulator IC from Texas Instruments designed for positive fixed 5V output applications with 500mA current capacity. This device operates in the Power Management (PMIC) category and is packaged in an 8-SOIC surface mount configuration. The part is currently in Last Time Buy status, indicating end-of-life transition. Identifying equivalent substitute parts is necessary to ensure design continuity and maintain supply chain reliability for new production runs and long-term product support.

Substiute Parts

TPS7350QDR

Texas InstrumentsIn Stock: 200118TPS7350QDR Datasheet

Current PartRFQ

TPS7A2650DRVR

Texas InstrumentsIn Stock: 17467TPS7A2650DRVR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The TPS7A2650DRVR qualifies as a functional substitute for the TPS7350QDR based on the following critical parameters:

Matching Electrical Specifications:

• Output voltage: 5V fixed (identical)
• Output current: 500mA (identical)
• Operating temperature range: -40°C ~ 125°C (identical)
• Input voltage compatibility: TPS7A2650DRVR supports up to 18V input, exceeding the TPS7350QDR requirement of 10V maximum
• Voltage dropout: TPS7A2650DRVR at 0.33V @ 500mA is within acceptable tolerance for 5V regulation applications
• RoHS3 compliance: Both parts meet identical environmental standards

Functional Feature Compatibility:

• Both devices provide Enable control functionality
• Both include Over Current and Over Temperature protection
• TPS7A2650DRVR adds Power Good output and UVLO (Under Voltage Lock Out) features, providing enhanced system monitoring capability

Package Consideration: The TPS7A2650DRVR uses 6-WSON (2x2) packaging versus the TPS7350QDR 8-SOIC packaging. This represents a physical footprint change requiring PCB layout modification but maintains surface mount compatibility.

Parameter Comparison

Engineering Selection Recommendations

The TPS7A2650DRVR is suitable as a substitute for the TPS7350QDR in applications requiring 5V, 500mA linear regulation. Selection should be based on the following factors:

Product Status Consideration: The TPS7350QDR is in Last Time Buy status, indicating limited future availability. The TPS7A2650DRVR maintains Active product status with current manufacturing support from Texas Instruments, ensuring long-term supply chain stability.

Compliance Alignment: Both parts maintain identical RoHS3 compliance and REACH unaffected status, satisfying equivalent environmental and regulatory requirements for industrial and commercial applications.

Functional Capability: The TPS7A2650DRVR provides enhanced system integration features through Power Good output and UVLO protection, offering improved fault detection capability compared to the TPS7350QDR Reset function. These additions do not create incompatibility but rather extend monitoring functionality.

Design Integration Factor: PCB layout modification is required due to package footprint change from 8-SOIC to 6-WSON (2x2). This substitution is appropriate for new design implementations or redesign cycles where layout flexibility exists. For existing production designs with fixed PCB layouts, this substitution requires engineering validation and board revision.

Frequently Asked Questions (FAQ)

Q: Can the TPS7A2650DRVR directly replace the TPS7350QDR without circuit modification?

A: The TPS7A2650DRVR provides electrical equivalence for 5V, 500mA regulation. However, the package footprint differs (6-WSON versus 8-SOIC), requiring PCB layout changes. Pin function differences exist: the TPS7A2650DRVR provides Power Good output instead of Reset, and UVLO protection instead of Reverse Polarity protection. Circuit schematic review is necessary to confirm compatibility with existing control and protection logic.

Q: What is the impact of the higher voltage dropout specification on the TPS7A2650DRVR?

A: The TPS7A2650DRVR specifies 0.33V dropout at 500mA versus 0.23V for the TPS7350QDR. This 0.10V difference is negligible for 5V regulation applications and does not affect output voltage accuracy or system performance in standard power supply designs.

Q: Does the TPS7A2650DRVR support the same input voltage range?

A: The TPS7A2650DRVR supports input voltages up to 18V, exceeding the TPS7350QDR maximum of 10V. This provides greater design flexibility for applications with variable input sources. Both devices operate identically within the 10V input specification of the original design.

Q: What are the implications of the lower quiescent current in the TPS7A2650DRVR?

A: The TPS7A2650DRVR quiescent current of 4.5 µA is significantly lower than the TPS7350QDR supply current of 550 µA. This reduction improves battery-powered and low-power standby applications, providing enhanced efficiency without affecting active regulation performance.

Q: How do the control features differ between these parts?

A: The TPS7350QDR provides Enable and Reset functions. The TPS7A2650DRVR provides Enable and Power Good output. The Power Good signal indicates when the output voltage is within regulation, replacing the Reset function. Applications using Reset for system initialization require circuit redesign to utilize Power Good signaling or alternative reset generation methods.

Q: Is the TPS7A2650DRVR suitable for designs requiring Reverse Polarity protection?

A: The TPS7350QDR includes integrated Reverse Polarity protection. The TPS7A2650DRVR does not specify this feature but includes UVLO (Under Voltage Lock Out) protection. Applications requiring Reverse Polarity protection must implement external protection circuitry when substituting with the TPS7A2650DRVR.