REF35300QDBVRQ1 Equivalent & Substitute Parts

Part Overview

The REF35300QDBVRQ1 is a Series Voltage Reference IC from Texas Instruments designed for automotive applications. It provides a fixed 3V output with exceptional precision (±0.05% tolerance) and ultra-low quiescent current (650 nA). The device is qualified to AEC-Q100 automotive standards and operates across the extended temperature range of -40°C to 125°C. This part is actively produced and widely used in automotive power management circuits requiring stable voltage references with minimal power consumption.

Substitute parts are identified when they maintain identical electrical performance specifications while differing only in packaging format or minor performance enhancements that do not affect core functionality.

Substiute Parts

REF35300QDBVRQ1

Texas InstrumentsIn Stock: 894REF35300QDBVRQ1 Datasheet

Current PartRFQ

REF35300QDBVR

Texas InstrumentsIn Stock: 2294REF35300QDBVR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The REF35300QDBVRQ1 and REF35300QDBVR are parametric equivalents within the REF35300 series. Substitution is valid based on the following criteria:

Identical Electrical Parameters:

• Fixed 3V output voltage
• ±0.05% output tolerance
• 10 mA maximum output current
• 2.6 µA quiescent current
• 3.25V to 6V input voltage range
• -40°C to 125°C operating temperature range
• SOT-23-6 package pinout compatibility

Allowable Variation:

• Temperature coefficient: REF35300QDBVRQ1 specifies 15 ppm/°C; REF35300QDBVR specifies 12 ppm/°C. The substitute exhibits superior temperature stability, making it functionally interchangeable.

Packaging Difference:

• REF35300QDBVRQ1: Tape & Reel (TR) format
• REF35300QDBVR: Cut Tape (CT) & Digi-Reel® format

Both parts maintain identical electrical performance and automotive qualification status.

Parameter Comparison

Engineering Selection Recommendations

Both the REF35300QDBVRQ1 and REF35300QDBVR are active, AEC-Q100 qualified automotive-grade voltage reference ICs suitable for direct substitution in circuit designs. Selection between these parts should be based on procurement and supply chain requirements:

REF35300QDBVRQ1 is specified when designs require Tape & Reel packaging for high-volume automated assembly processes.

REF35300QDBVR is specified when Cut Tape or Digi-Reel® packaging is preferred for lower-volume production, prototype builds, or when inventory management favors smaller package quantities.

The superior temperature coefficient of REF35300QDBVR (12 ppm/°C versus 15 ppm/°C) provides enhanced long-term stability across the automotive operating temperature range, making it the preferred choice for applications with stringent temperature drift requirements. However, both parts meet the ±0.05% tolerance specification and maintain identical electrical performance in all other parameters.

Frequently Asked Questions (FAQ)

Q: Can REF35300QDBVR replace REF35300QDBVRQ1 in an existing design?

A: Yes. Both parts are electrically identical with the same output voltage, tolerance, quiescent current, input range, and operating temperature specifications. The only difference is packaging format (Tape & Reel versus Cut Tape & Digi-Reel®). No circuit modifications are required.

Q: What is the significance of the temperature coefficient difference?

A: REF35300QDBVR has a temperature coefficient of 12 ppm/°C compared to 15 ppm/°C for REF35300QDBVRQ1. This means the substitute exhibits slightly better output voltage stability across temperature variations. For most automotive applications, both specifications are acceptable; however, designs with tight voltage regulation requirements may benefit from the lower coefficient.

Q: Are both parts AEC-Q100 qualified?

A: Yes. Both REF35300QDBVRQ1 and REF35300QDBVR carry AEC-Q100 automotive qualification and are suitable for automotive-grade applications operating from -40°C to 125°C.

Q: What packaging formats are available?

A: REF35300QDBVRQ1 is supplied in Tape & Reel (TR) format for high-volume automated pick-and-place assembly. REF35300QDBVR is supplied in Cut Tape (CT) and Digi-Reel® formats, which are suitable for lower-volume production or manual assembly processes.

Q: Do both parts have the same pinout?

A: Yes. Both parts use the SOT-23-6 package with identical pinout and are direct pin-for-pin replacements.

Q: What is the current availability status?

A: Both parts are actively produced by Texas Instruments. REF35300QDBVRQ1 has 849 pieces in stock; REF35300QDBVR has 2200 pieces in stock.