TPS7B4253QDDARQ1

Texas Instruments TPS7B4253QDDARQ1 – Automotive 300‑mA Voltage‑Tracking LDO with 4‑mV Tolerance

The Texas Instruments TPS7B4253QDDARQ1 is an AEC‑Q100 automotive‑qualified, low‑dropout (LDO) voltage‑tracking regulator designed for modern vehicle electronics. It delivers up to 300 mA while tightly tracking a reference rail with a 4‑mV tracking tolerance. Housed in an 8‑pin SO PowerPAD (DDA) package for efficient thermal performance, this device is well suited for ECUs, body electronics, infotainment, and sensor/MCU supplies that must follow a master supply precisely.

This article consolidates the essential sourcing, design, and compliance details for the TPS7B4253QDDARQ1 so engineers, buyers, and program managers can make quick, confident decisions.

Why engineers choose TPS7B4253QDDARQ1

• Voltage‑tracking LDO with 4‑mV tracking tolerance for precise rail alignment
• 300‑mA output capability for point‑of‑load rails in space‑constrained modules
• Automotive‑qualified (AEC‑Q100) for confidence in on‑vehicle deployments
• Integrated current limit and thermal shutdown for robust fault protection
• Compact 8‑pin SO PowerPAD (DDA) package; surface‑mount friendly

Key specifications

• Manufacturer / Brand: Texas Instruments
• MPN: TPS7B4253QDDARQ1
• Series: TPS7B425x‑Q1
• Category: Linear Regulators (LDO)
• Regulator type: Low‑Dropout (LDO), Voltage Tracking
• Topology: Adjustable / Tracking
• Output current: 300 mA
• Tracking tolerance: 4 mV
• Automotive qualification: AEC‑Q100
• Package code: DDA (SO PowerPAD‑8, 8‑SOIC with exposed pad)
• Pin count: 8
• Mounting type: Surface mount
• Packaging: Tape & Reel (TR)
• Junction temperature range: −40°C to +150°C
• Integrated protection: Current limit, Thermal shutdown

Notes on unspecified parameters:

• Input voltage range: Not specified in provided data
• Dropout voltage: Not specified in provided data
• Quiescent current: Not specified in provided data
• Output noise/PSRR: Not specified in provided data

Refer to the official TI datasheet for full electrical characteristics.

How the voltage‑tracking feature adds value

Tight rail correlation is critical in many automotive systems—particularly when powering sensitive sensors, MCUs, or communication transceivers that need to follow a reference (for example, a primary logic rail). The TPS7B4253QDDARQ1 tracks a designated reference supply within 4 mV, helping to:

• Maintain safe and predictable headroom between dependent rails
• Simplify sequencing strategies without complex power management ICs
• Reduce risk of brownout conditions caused by unexpected rail deltas
• Improve system stability in dynamic load conditions common in vehicle environments

In practice, this means designers can confidently align a downstream rail to a master supply and keep tolerances tight across temperature and operating states, provided the system is implemented per the datasheet guidelines.

Applications

• Automotive power rails requiring voltage tracking
• Electronic control units (ECUs)
• Body electronics and comfort modules
• Infotainment and telematics
• Sensor and MCU supplies where a rail must follow a reference supply closely

These use cases benefit from the device’s ability to track a defined reference while supplying up to 300 mA, offering a compact, thermally capable solution for localized regulation.

Package, layout, and thermal considerations

• Package: DDA (SO PowerPAD‑8, 8‑SOIC with exposed thermal pad)
• Mounting: Surface mount
• Pin count: 8

Design guidance:

• The exposed PowerPAD enhances heat dissipation. For best thermal performance, follow TI’s recommended PCB footprint and solder the pad to an appropriate copper area (typically tied to a low‑impedance reference as directed by the datasheet).
• Place local input and output capacitors close to the device pins as recommended in the datasheet to minimize impedance and improve transient behavior.
• Observe reference‑tracking pin connections and filtering exactly as shown in TI’s application circuits to achieve the specified 4‑mV tracking tolerance.

Note: Always consult the official TI layout recommendations in the datasheet for pad design, via stitching, and thermal analysis guidance.

Protection and reliability features

Automotive electronics demand predictable behavior under fault conditions. The TPS7B4253QDDARQ1 integrates:

• Current limit protection: Helps protect the LDO and the system during overloads or short‑circuit events.
• Thermal shutdown: Shuts down the device when the junction temperature exceeds safe limits, improving overall system reliability.

These protections reduce the need for external safeguards and support faster qualification cycles in automotive designs.

Lifecycle and sourcing

• Lifecycle status: Active (per TI product page reference)
• Replacements: None listed in provided data
• Approved alternates: Not provided; policy note indicates using only AEC‑Q100 qualified alternates for automotive designs
• Inventory status: Not specified for supply chain; check authorized channels and TI’s product page for current availability
• Pricing: By request; varies by volume and region

Sourcing checklist:

• Verify the exact orderable: TPS7B4253QDDARQ1
• Package: DDA (SO PowerPAD‑8)
• Packaging: Tape & Reel (TR)
• Compliance: AEC‑Q100, RoHS compliant
• Operating temperature: −40°C to +150°C (junction)
• Electrical needs: 300‑mA output, 4‑mV tracking tolerance

Tip: For automotive programs requiring PPAP, coordinate early with TI or franchised distributors to align documentation with your APQP milestones.

Compliance and environmental

• Automotive qualification: AEC‑Q100 (Automotive); PPAP available (per TI)
• RoHS: RoHS compliant; lead‑free

These certifications help streamline component approval and BOM compliance for global automotive platforms. Always retain the latest certificates and test reports in your project quality files.

Ordering information at a glance

• MPN: TPS7B4253QDDARQ1
• Series: TPS7B425x‑Q1
• Package / case: DDA (SO PowerPAD‑8, 8‑SOIC with exposed pad)
• Mounting: Surface mount
• Pin count: 8
• Packaging: Tape & Reel (TR)

For full orderable options, consult the Texas Instruments product page.

Design‑in considerations

When designing with the TPS7B4253QDDARQ1:

• Reference tracking: Ensure the chosen reference rail meets the datasheet’s requirements (voltage range, stability, and tolerance) so the LDO can maintain the 4‑mV tracking specification.
• Decoupling: Use low‑ESR capacitors as specified by TI for input/output stability. Keep traces short and wide to reduce parasitics.
• Thermal: Estimate power dissipation based on load and headroom to size the copper area on the PowerPAD appropriately and maintain safe junction temperatures up to 150°C.
• Transients: Validate response to load steps relevant to your ECU or sensor domain. Confirm regulation and tracking across the operating temperature range.

Because specific component values, startup behavior, and pin functions are application‑dependent, always refer to TI’s datasheet design examples and recommended operating conditions.

Frequently asked questions (FAQs)

Q: What distinguishes TPS7B4253‑Q1 from TPS7B4250‑Q1?
A: TPS7B4253‑Q1 provides adjustable voltage tracking with a 4‑mV tracking tolerance, while TPS7B4250‑Q1 is a fixed‑output LDO variant in the same family.

Q: Is the TPS7B4253QDDARQ1 suitable for automotive applications?
A: Yes. It is AEC‑Q100 automotive‑qualified and intended for automotive power rails that require tight tracking to a reference voltage.

Q: What is the maximum output current?
A: 300 mA, according to the provided specifications.

Q: What is the tracking accuracy?
A: 4 mV tracking tolerance.

Q: What is the operating junction temperature range?
A: −40°C to +150°C (junction), per the provided data.

Q: Does it include protection features?
A: Yes. It integrates current limit and thermal shutdown.

Q: Is PPAP available?
A: Per the compliance notes, PPAP is available. Coordinate with TI or authorized distributors for program documentation.

Q: Is the device RoHS compliant?
A: Yes. It is lead‑free and RoHS compliant.

Q: Are there recommended alternates?
A: None are listed in the provided data. For automotive designs, use only AEC‑Q100 qualified alternates if substitution is necessary.

Q: Where can I find the full electrical specifications and application guidance?
A: Refer to TI’s official datasheet and product page linked below.

Resources

• Datasheet: https://www.ti.com/lit/ds/symlink/tps7b4253-q1.pdf
• Product page: https://www.ti.com/product/TPS7B4253-Q1

Summary

The Texas Instruments TPS7B4253QDDARQ1 is a robust, automotive‑qualified voltage‑tracking LDO that delivers up to 300 mA with an exceptional 4‑mV tracking tolerance. Its compact SO PowerPAD‑8 package, integrated protection features, and AEC‑Q100 qualification make it a strong fit for ECUs, body electronics, infotainment, and sensor/MCU domains that must closely follow a reference supply. With RoHS compliance, wide junction temperature capability, and TI’s established automotive pedigree, the TPS7B4253QDDARQ1 streamlines both design‑in and sourcing for safety‑ and reliability‑conscious vehicle platforms.

For complete electrical details, recommended circuits, and layout guidance, consult the official TI datasheet and product page before finalizing your design.