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Texas Instruments TPS78425BQWDRBRQ1
- Part No.:
- TPS78425BQWDRBRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
TPS78425BQWDRBRQ1.pdf
- Description:
- AUTOMOTIVE, 300-MA, LOW-IQ, HIGH
- Quantity:
- Payment:
- Shipping:
Inventory:9,579
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Product details
Overview
TPS78425BQWDRBRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive LDO voltage regulator delivering 300 mA output with 0.65 V fixed output, 115 mV max dropout at 300 mA (3.3 VOUT), ±1.7% output accuracy over –40°C to +150°C, and 50-dB PSRR up to 100 kHz - used for powering infotainment SoCs and analog sensor rails in head units.
For engineers reviewing the TPS78425BQWDRBRQ1 datasheet, TPS78425BQWDRBRQ1 pinout, TPS78425BQWDRBRQ1 application, or TPS78425BQWDRBRQ1 equivalent, key selection criteria include its wettable-flank VSON-8 package, functional safety documentation support, ultra-low 25 µA quiescent current, active output discharge, and 500-µs internal soft-start for reduced inrush in automotive power sequencing.
Technical Context
The TPS78425BQWDRBRQ1 implements a PMOS pass transistor architecture enabling ultra-low dropout and high PSRR across wide load and temperature ranges. Its foldback current limit and thermal shutdown (170°C) provide robust fault protection during overload or ambient stress.
It integrates an enable input with logic-level thresholds (VEN(HI) = 0.85 V min), internal feedback reference (1.2 V nominal), and active pulldown circuitry for rapid output discharge when disabled - all qualified per AEC-Q100 for automotive junction temperatures from –40°C to +150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 0.65 V - supports low-voltage core rails for modern automotive processors and FPGAs. |
| Max Output Current | 300 mA - sufficient for post-regulation of intermediate power domains in telematics and instrument clusters. |
| Dropout Voltage | 115 mV max at 300 mA (for VOUT ≥ 2.5 V) - enables operation from 0.765 V input when regulating 0.65 V output. |
| Output Accuracy | ±1.7% over –40°C to +150°C - ensures stable voltage margining for safety-critical timing and ADC reference circuits. |
| PSRR | 50 dB at 100 kHz - suppresses switching noise from upstream DC/DC converters feeding sensitive analog subsystems. |
| Quiescent Current | 25 µA typical - minimizes standby power loss in always-on automotive modules like remote keyless entry receivers. |
| Enable Threshold | VEN(HI) ≥ 0.85 V - compatible with 1.2-V or 1.8-V logic I/O without level-shifting in domain-powered systems. |
Pinout & Package
TPS78425BQWDRBRQ1 uses the 3.00 mm × 3.00 mm wettable flank VSON-8 (DRB) package with exposed thermal pad electrically tied to GND. Pin 1 is OUT; pin 5 is GND; pin 6 is EN; pins 2, 3, 4, and 7 are NC; pin 8 is IN.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Regulated output | Delivers stable 0.65 V to load; requires ≥0.47 µF ceramic capacitor to ground for stability. |
| 5 (GND) | Power ground | Reference node for regulation and thermal path; must connect to large PCB ground plane via thermal pad. |
| 6 (EN) | Enable control input | Logic-high (>0.85 V) enables regulator; logic-low (<0.425 V) disables with active pulldown. |
| 8 (IN) | Input supply | Accepts 1.65 V–6.0 V input; requires ≥0.1 µF ceramic capacitor close to pin for transient immunity. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 | Qualified for –40°C to +125°C ambient (TJ up to +150°C), meeting automotive reliability and qualification requirements. |
| Active Output Discharge | Internal pulldown resistor (~120 Ω at 3.3 V) rapidly discharges output capacitance upon disable, preventing floating rail issues. |
| 500-µs Soft-Start | Internally controlled ramp reduces inrush current, allowing smaller input capacitors and easing system power-up sequencing. |
| Functional Safety Support | Documentation available (FIT rate, failure modes, diagnostic coverage) to aid ISO 26262 ASIL-B system design. |
| Foldback Current Limit | Reduces output current under short-circuit conditions to limit power dissipation and prevent thermal runaway. |
Applications
| Automotive Head Units | Hybrid Instrument Clusters |
|---|---|
Use Scenario: Powering DSP, audio codec, and display interface ICs in centralized infotainment systems. IC Role / Device Role / Timing Role: Post-regulator supplying clean 0.65 V core voltage to low-power SoC domains. Use Value: 50-dB PSRR at 100 kHz suppresses noise from adjacent buck converters, preserving audio SNR and display timing integrity. | Use Scenario: Delivering stable voltage to microcontroller cores and CAN transceivers in digital gauge clusters. IC Role / Device Role / Timing Role: Low-quiescent-current LDO enabling always-on functionality while meeting ASIL-B voltage monitoring requirements. Use Value: 25 µA IQ and ±1.7% accuracy ensure reliable boot and runtime operation across full automotive temperature range. |
| Telematics Control Units | DC/DC Converter Post-Regulation |
Use Scenario: Supplying GPS/GNSS baseband processors and cellular modem RF sections requiring ultra-low noise. IC Role / Device Role / Timing Role: Noise-sensitive analog rail generator with active discharge for fast power-state transitions. Use Value: 30 µVRMS output noise (10 Hz–100 kHz) and 500-µs soft-start minimize RF interference and startup glitches. | Use Scenario: Tight-regulation stage after high-efficiency buck converter to meet tight voltage tolerance for FPGA I/O banks. IC Role / Device Role / Timing Role: Precision low-dropout buffer correcting residual ripple and load-induced droop. Use Value: 115 mV dropout at 300 mA allows operation with minimal input–output differential, improving overall system efficiency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7B8733QKVURQ1 | 3.3 V fixed output, 450 mA rating, higher IQ (30 µA), no active discharge | Designed for mid-rail supplies (e.g., MCU I/O), not sub-1 V core rails | Select when 3.3 V output and higher current are required; avoid for 0.65 V core regulation. |
| TLV733065PDQNR | 0.65 V fixed output, 300 mA, non-automotive grade (no AEC-Q100), 17 µA IQ | Lacks automotive qualification, thermal shutdown, and functional safety documentation | Use only in non-automotive industrial or consumer designs where AEC-Q100 is not mandated. |
Compared with TPS78425BQWDRBRQ1, the TPS7B8733QKVURQ1 provides higher current but lacks 0.65 V output and active discharge, while TLV733065PDQNR matches output voltage and current but omits automotive qualification and safety features critical for vehicle deployment.
Availability
TPS78425BQWDRBRQ1 is available at Aetrix Electronics and suitable for automotive head units, hybrid instrument clusters, and telematics control units requiring stable component supply with AEC-Q100 compliance and long-term production support.
Supply support for TPS78425BQWDRBRQ1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor company specializing in analog and embedded processing technologies, with leadership in automotive-grade power management ICs.
The TPS784-Q1 product line delivers high-accuracy, low-noise LDOs for safety-critical automotive subsystems, emphasizing AEC-Q100 qualification, functional safety documentation, and ultra-low dropout performance.
FAQ
What is the output voltage of the TPS78425BQWDRBRQ1?
The TPS78425BQWDRBRQ1 provides a fixed 0.65 V output voltage optimized for low-voltage core rails in automotive processors and FPGAs. This value is factory-trimmed and does not require external resistors, ensuring consistent regulation across temperature and load conditions within ±1.7% accuracy over –40°C to +150°C junction range.
Does the TPS78425BQWDRBRQ1 support automotive qualification?
Yes, the TPS78425BQWDRBRQ1 is AEC-Q100 qualified for Grade 1 automotive applications, with operating ambient temperature from –40°C to +125°C and junction temperature up to +150°C. It includes functional safety documentation and meets stringent automotive reliability, ESD (±2 kV HBM), and thermal performance requirements.
What package type does the TPS78425BQWDRBRQ1 use?
The TPS78425BQWDRBRQ1 uses the 3.00 mm × 3.00 mm wettable flank VSON-8 (DRB) package with an exposed thermal pad connected to GND. This package supports automated optical inspection (AOI) and improves thermal performance with RθJA = 61.8°C/W, making it suitable for space-constrained automotive PCB layouts.
How does the enable function operate on the TPS78425BQWDRBRQ1?
The EN pin (Pin 6) on the TPS78425BQWDRBRQ1 controls device operation: logic high (≥0.85 V) enables regulation; logic low (≤0.425 V) disables output and activates internal pulldown. The pin must not be left floating - if unused, tie to IN. This enables precise power sequencing in multi-rail automotive systems.
What is the dropout voltage specification for the TPS78425BQWDRBRQ1 at full load?
At 300 mA output current and for VOUT ≥ 2.5 V, the TPS78425BQWDRBRQ1 has a maximum dropout voltage of 115 mV. For its 0.65 V output variant, dropout is specified at 900 mV (0.65 V ≤ VOUT < 0.8 V), enabling operation from inputs as low as 1.55 V while maintaining regulation - critical for battery-backed automotive subsystems.
TPS78425BQWDRBRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-VDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.32V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 40 µA
- Current - Supply (Max):
- -
- PSRR:
- 60dB ~ 30dB (1kHz ~ 1MHz)
- Control Features:
- Current Limit, Enable
- Protection Features:
- Over Current, Over Temperature, UVLO
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 8-SON (3x3)
TPS78425BQWDRBRQ1 FAQ
1.How can I place an order for TPS78425BQWDRBRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS78425BQWDRBRQ1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TPS78425BQWDRBRQ1 reliable?
The price and inventory of TPS78425BQWDRBRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS78425BQWDRBRQ1 is usually 5 days.
3.What payment methods are accepted for TPS78425BQWDRBRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS78425BQWDRBRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS78425BQWDRBRQ1?
TPS78425BQWDRBRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS78425BQWDRBRQ1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TPS78425BQWDRBRQ1?
For technical support, including TPS78425BQWDRBRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS78425BQWDRBRQ1 requirements.
6.How does Aetrix verify that TPS78425BQWDRBRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS78425BQWDRBRQ1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TPS78425BQWDRBRQ1 meets industry standards.
7.What is the process for return or replacement of TPS78425BQWDRBRQ1?
All TPS78425BQWDRBRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS78425BQWDRBRQ1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TPS78425BQWDRBRQ1 part is unused and in its original packaging.
Return procedure for TPS78425BQWDRBRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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