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Texas Instruments TPS78415QDBVRQ1
- Part No.:
- TPS78415QDBVRQ1
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS78415QDBVRQ1.pdf
- Description:
- IC REG LINEAR 1.5V 300MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,944
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Product details
Overview
TPS78415QDBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive LDO voltage regulator delivering 300 mA output with 1.5 V fixed output, 115 mV max dropout at 300 mA, 0.5% typical output accuracy, and 50-dB PSRR up to 100 kHz-designed for powering sensitive analog circuits in head units and instrument clusters.
For engineers reviewing the TPS78415QDBVRQ1 datasheet, TPS78415QDBVRQ1 pinout, TPS78415QDBVRQ1 application, or TPS78415QDBVRQ1 equivalent, this page delivers verified electrical specs, thermal performance data, functional safety documentation support, and validated alternatives for automotive power rail design.
Technical Context
The TPS78415QDBVRQ1 implements a PMOS pass transistor architecture enabling ultra-low dropout and high PSRR across 10 Hz–1 MHz. Its internal 500-µs soft-start and active output discharge circuit ensure controlled power sequencing and rapid load discharge during disable.
It features foldback current limiting (320–420 mA), thermal shutdown (170°C trip), and AEC-Q100-compliant operation from –40°C to +125°C ambient (–40°C to +150°C junction), with input voltage range 1.65 V to 6.0 V supporting post-regulation after DC/DC converters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5 V - matches common low-voltage analog rails (e.g., ADC reference, sensor interface) |
| Max Output Current | 300 mA - sufficient for multi-rail SoC core/peripheral domains in telematics modules |
| Dropout Voltage | 115 mV (max) at 300 mA - enables stable regulation from 1.65 V input (e.g., LiFePO₄ battery or buck converter output) |
| Output Accuracy | ±1.7% over –40°C to +150°C - ensures timing-critical analog subsystems remain within spec across full automotive temperature range |
| PSRR | 50 dB @ 100 kHz - suppresses switching noise from adjacent DC/DC converters feeding RF or audio circuits |
| Quiescent Current | 25 µA (typical) - supports always-on functions (e.g., CAN wake-up logic) without excessive battery drain |
| Enable Threshold | VEN(HI) = 0.85 V (min) - compatible with 1.2-V or 1.8-V logic-level control signals |
Pinout & Package
TPS78415QDBVRQ1 uses the 5-pin SOT-23 (DBV) package (2.90 mm × 1.60 mm), optimized for space-constrained automotive PCBs and compatible with standard reflow profiles. Thermal performance is enhanced via GND pin and board-level copper pour.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Input supply connection | Accepts 1.65–6.0 V; requires ≥0.1 µF ceramic capacitor to GND for stability and transient response |
| 2 - GND | Power ground reference | Must connect directly to low-impedance system ground plane; serves as thermal path and feedback reference |
| 3 - EN | Logic-controlled enable input | Active-high; drives device ON when ≥0.85 V; must not float-tie to IN if unused |
| 4 - NC | No-connect terminal | Internally unconnected; recommended to leave floating or tie to GND for mechanical stability |
| 5 - OUT | Regulated output node | Delivers 1.5 V ±1.7%; requires ≥0.47 µF ceramic capacitor to GND; supports 300-mA load |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation-meets automotive reliability and lifetime requirements |
| Functional Safety-Capable documentation | TI provides FIT rate, failure mode analysis, and diagnostic coverage reports to accelerate ISO 26262 ASIL-B/C system certification |
| Active output discharge | Internal pulldown resistor (~120 Ω) discharges output to GND within microseconds upon disable-prevents floating voltages in downstream circuits |
| Ultra-low quiescent current | 25 µA typical IQ enables >1-year battery life in always-on vehicle modules (e.g., keyless entry receivers) |
| Foldback current limit | Reduces power dissipation during overload by lowering output current as VOUT drops-protects die during sustained short-circuit events |
Applications
| Automotive Head Units | Hybrid Instrument Clusters |
|---|---|
Use Scenario: Powering audio codec, touchscreen controller, and display interface ICs in infotainment systems. IC Role / Device Role / Timing Role: Primary 1.5-V analog rail regulator providing low-noise, high-PSRR supply for precision DACs and ADCs. Use Value: 30-µVRMS output noise and 50-dB PSRR at 100 kHz prevent audible artifacts and measurement errors in audio/video signal chains. | Use Scenario: Supplying microcontroller peripherals, CAN transceivers, and gauge driver ICs in digital dashboards. IC Role / Device Role / Timing Role: Secondary LDO for isolated 1.5-V domain, decoupling MCU core logic from noisy power domains. Use Value: 115-mV dropout enables operation from 1.65-V input-compatible with buck converter outputs tracking battery voltage down to 9 V. |
| Telematics Control Units | DC/DC Converter Post-Regulation |
Use Scenario: Delivering clean 1.5-V supply to GNSS baseband processors and LTE modem RF sections. IC Role / Device Role / Timing Role: Low-noise post-regulator filtering ripple from primary 3.3-V buck stage before sensitive RF front-end stages. Use Value: 60-dB PSRR at 1 kHz and 30-dB PSRR at 1 MHz suppress switching harmonics from upstream converters, improving RF SNR. | Use Scenario: Tightening output voltage tolerance and reducing ripple on switched-mode power supply outputs. IC Role / Device Role / Timing Role: Precision LDO placed after buck converter to meet tight analog rail tolerances (<±2%) under dynamic load. Use Value: ±1.7% accuracy over full temperature range eliminates need for external trimming resistors or calibration in production test. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO voltage regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS78515QWDRBRQ1 | Higher PSRR (65 dB @ 100 kHz), lower IQ (1.4 µA), same 1.5-V fixed output and SOT-23-5 package | Better suited for ultra-low-power always-on nodes (e.g., intrusion detection sensors); lacks active discharge | Select when lowest possible quiescent current and highest PSRR are critical; verify discharge requirement compatibility |
| NCP115ASN150T2G | 1.5-V fixed output, 300-mA rating, but only AEC-Q100 Grade 2 (–40°C to +105°C), no functional safety documentation | Limited to cabin-temperature applications (e.g., non-critical body control modules); no ISO 26262 support | Choose for cost-sensitive, non-safety-critical automotive subsystems where extended temperature range is not required |
Compared with TPS78415QDBVRQ1, TPS78515QWDRBRQ1 offers superior PSRR and nanoamp-level quiescent current but omits active output discharge-critical for fail-safe shutdown behavior. NCP115ASN150T2G provides basic 1.5-V regulation at lower cost but lacks Grade 1 qualification and functional safety assets.
Availability
TPS78415QDBVRQ1 is available at Aetrix Electronics and suitable for automotive head units, hybrid instrument clusters, and telematics control units requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for TPS78415QDBVRQ1 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 leader specializing in analog and embedded processing technologies, with deep expertise in automotive-grade power management ICs.
The TPS784-Q1 product line was engineered specifically for AEC-Q100-compliant automotive subsystems demanding high accuracy, low noise, and functional safety documentation-targeting infotainment, ADAS, and body electronics.
FAQ
What is the maximum input voltage rating for the TPS78415QDBVRQ1?
The TPS78415QDBVRQ1 has an absolute maximum input voltage of 6.5 V, with recommended operating input range from 1.65 V to 6.0 V. Exceeding 6.5 V risks permanent damage. The device's UVLO threshold activates at 1.32–1.6 V (rising), ensuring safe startup only when input is within specification.
Does the TPS78415QDBVRQ1 include active output discharge functionality?
Yes, the TPS78415QDBVRQ1 integrates an active pulldown circuit that discharges the output capacitor rapidly when the EN pin is driven low. This feature prevents floating voltages on downstream circuitry during power-down sequences, enhancing system reliability in automotive applications requiring strict fail-safe behavior.
What is the thermal performance of the TPS78415QDBVRQ1 in its SOT-23 package?
The TPS78415QDBVRQ1 in the DBV (SOT-23-5) package has a junction-to-board thermal resistance (RθJB) of 10.2°C/W and a junction-to-ambient resistance (RθJA) of 170.8°C/W under standard JEDEC conditions. Effective PCB layout-using thermal vias and GND copper pour-is essential to maintain junction temperature ≤150°C at 300 mA load.
Is the TPS78415QDBVRQ1 qualified for functional safety applications per ISO 26262?
The TPS78415QDBVRQ1 is labeled "Functional Safety-Capable" by Texas Instruments, meaning it ships with documentation-including FIT rate, failure mode analysis, and diagnostic coverage reports-to support ISO 26262 ASIL-B or ASIL-C system-level certification. However, final safety validation remains the responsibility of the end-system integrator.
Can the TPS78415QDBVRQ1 be used with ceramic output capacitors smaller than 1 µF?
Yes-the TPS78415QDBVRQ1 is stable with a minimum effective output capacitance of 0.47 µF. While 1 µF is recommended for optimal transient response, designs using 0.47 µF X7R ceramics meet stability requirements and reduce BOM count and board area in space-constrained automotive modules.
TPS78415QDBVRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- 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):
- 1.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.175V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 30 µA
- Current - Supply (Max):
- 43 µA
- PSRR:
- 60dB ~ 30dB (1kHz ~ 1MHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TPS78415QDBVRQ1 FAQ
1.How can I place an order for TPS78415QDBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS78415QDBVRQ1 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 TPS78415QDBVRQ1 reliable?
The price and inventory of TPS78415QDBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS78415QDBVRQ1 is usually 5 days.
3.What payment methods are accepted for TPS78415QDBVRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS78415QDBVRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS78415QDBVRQ1?
TPS78415QDBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS78415QDBVRQ1 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 TPS78415QDBVRQ1?
For technical support, including TPS78415QDBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS78415QDBVRQ1 requirements.
6.How does Aetrix verify that TPS78415QDBVRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS78415QDBVRQ1 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 TPS78415QDBVRQ1 meets industry standards.
7.What is the process for return or replacement of TPS78415QDBVRQ1?
All TPS78415QDBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS78415QDBVRQ1, 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 TPS78415QDBVRQ1 part is unused and in its original packaging.
Return procedure for TPS78415QDBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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