My Inquiry
My Account
Texas Instruments TPS78411QWDRBRQ1
- Part No.:
- TPS78411QWDRBRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
TPS78411QWDRBRQ1.pdf
- Description:
- AUTOMOTIVE, 300-MA, LOW-IQ, HIGH
- Quantity:
- Payment:
- Shipping:
Inventory:2,467
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS78411QWDRBRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive LDO voltage regulator delivering 300 mA output current with 115 mV max dropout at 3.3 VOUT, ±1.7% output accuracy over –40°C to +150°C junction temperature, and 50-dB PSRR up to 100 kHz-designed for powering noise-sensitive analog circuits in automotive head units and instrument clusters.
For engineers reviewing the TPS78411QWDRBRQ1 datasheet, TPS78411QWDRBRQ1 pinout, TPS78411QWDRBRQ1 application, or TPS78411QWDRBRQ1 equivalent, key selection criteria include ultra-low quiescent current (25 µA typ), active output discharge, functional safety documentation support, and wettable flank VSON-8 packaging for automated optical inspection in automotive production.
Technical Context
The TPS78411QWDRBRQ1 implements a PMOS pass transistor architecture enabling ultra-low dropout and high PSRR across wide load and line conditions. Its internal 500-µs soft-start limits inrush current during power-up, while foldback current limiting reduces thermal stress under sustained overload.
Functional safety capability is supported by TI's FIT rate data, failure mode analysis, and diagnostic coverage documentation-enabling integration into ASIL-B systems without requiring external monitoring circuitry for basic fault detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output current | 300 mA continuous-supports microcontroller cores, CAN transceivers, and ADCs in automotive ECUs |
| Dropout voltage | 115 mV max at 300 mA and 3.3 VOUT-enables regulation from 3.3 V input down to 3.185 V output, preserving headroom in low-voltage battery scenarios |
| Output accuracy | ±1.7% over –40°C to +150°C-ensures stable reference for precision sensors and high-resolution DACs |
| PSRR | 50 dB at 100 kHz-suppresses switching noise from adjacent DC/DC converters feeding sensitive RF or audio subsystems |
| IQ | 25 µA typical-extends battery runtime in always-on automotive modules such as telematics wake-up circuits |
| Enable threshold | VEN(HI) = 0.85 V min-compatible with 1.2-V and 1.8-V logic-level control signals without level-shifting |
| Soft-start time | 500 µs internal-reduces required input capacitance and eliminates need for external timing components |
Pinout & Package
TPS78411QWDRBRQ1 uses the 3.00 mm × 3.00 mm wettable flank VSON-8 package (DRB), optimized for automated optical inspection and thermal performance in automotive PCB assemblies. The exposed thermal pad is electrically connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Regulated output | Delivers stable 1.1 V output; requires ≥0.47 µF ceramic capacitor to ground for stability |
| 2 - NC | No-connect | Not internally bonded; connect to GND for improved thermal dissipation |
| 3 - NC | No-connect | Not internally bonded; connect to GND for improved thermal dissipation |
| 4 - NC | No-connect | Not internally bonded; connect to GND for improved thermal dissipation |
| 5 - GND | Ground reference | Primary return path for load current and internal bias; must be low-impedance connection to system GND plane |
| 6 - EN | Enable control | Active-high logic input; drives device ON when ≥0.85 V, OFF when ≤0.425 V; must not float |
| 7 - NC | No-connect | Not internally bonded; connect to GND for improved thermal dissipation |
| 8 - IN | Input supply | Accepts 1.65 V to 6.0 V; requires ≥0.1 µF ceramic capacitor to GND placed adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for operation from –40°C to +125°C ambient, supporting under-hood and dashboard applications |
| Active output discharge | Internal pulldown circuit discharges output within microseconds upon disable-prevents floating rails and ensures clean power sequencing |
| Functional safety documentation | TI provides FIT rate, FMEA, and diagnostic coverage reports-accelerating ISO 26262 ASIL-B system certification |
| Ultra-low dropout | 115 mV max at full 300 mA load enables use with buck converter outputs as low as 3.185 V for 3.3 V rail generation |
| Low-noise regulation | 30 µVRMS output noise (10 Hz–100 kHz) preserves signal integrity in precision analog front-ends |
Applications
| Automotive Head Units | Hybrid Instrument Clusters |
|---|---|
Use Scenario: Powering DSP, touchscreen controller, and audio codec in infotainment head units with strict EMI and thermal constraints. IC Role / Device Role / Timing Role: Primary post-regulator supplying clean 1.1 V to low-power SoC domains and 3.3 V to interface peripherals. Use Value: 50-dB PSRR at 100 kHz suppresses switching noise from upstream DC/DC converters, eliminating audible artifacts in audio output. | Use Scenario: Supplying display driver ICs and microcontroller peripherals in digital instrument clusters with dual-display redundancy. IC Role / Device Role / Timing Role: Low-quiescent-current LDO providing 1.1 V core voltage for real-time MCU operation during vehicle sleep mode. Use Value: 25 µA typical IQ minimizes parasitic drain on 12-V battery, extending safe parking duration beyond 30 days. |
| Telematics Control Units | DC/DC Converter Post-Regulation |
Use Scenario: Regulating auxiliary rails for LTE/C-V2X modems and GNSS receivers in TCUs where RF sensitivity demands ultra-low noise. IC Role / Device Role / Timing Role: Noise-filtering LDO placed after buck converter to isolate RF sections from power supply ripple. Use Value: 30 µVRMS output noise prevents degradation of GNSS carrier-to-noise ratio (C/N0) below 38 dB-Hz. | Use Scenario: Tight-tolerance post-regulation of 3.3 V or 5.0 V rails generated by wide-input buck controllers in multi-rail automotive power architectures. IC Role / Device Role / Timing Role: Precision LDO correcting residual line/load regulation error of primary DC/DC stage. Use Value: ±1.7% output accuracy over temperature ensures consistent ADC reference voltage and sensor excitation levels across full vehicle operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7B8711QKVURQ1 | Higher IQ (35 µA typ), lower PSRR (40 dB @ 100 kHz), no active discharge | Lacks active output discharge and has reduced noise rejection-less suitable for fast power sequencing or RF-sensitive loads | Select when cost optimization outweighs need for ultra-low noise or controlled shutdown discharge |
| TLV73311PQDBVRQ1 | Lower output current (300 mA same), higher dropout (250 mV @ 300 mA), no functional safety documentation | Not AEC-Q100 certified for Grade 1; lacks FIT/FMEA support-requires additional validation for ASIL-B systems | Select only for non-safety-critical body electronics where qualification overhead is prohibitive |
Compared with TPS7B8711QKVURQ1 and TLV73311PQDBVRQ1, the TPS78411QWDRBRQ1 uniquely combines Grade 1 AEC-Q100 qualification, functional safety documentation, active output discharge, and 50-dB PSRR-making it the only choice for ASIL-B-compliant, noise-sensitive, fast-sequencing automotive LDO applications.
Availability
TPS78411QWDRBRQ1 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 production lifecycles.
Supply support for TPS78411QWDRBRQ1 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, embedded processing, and automotive-grade power management solutions.
The TPS784-Q1 product line delivers high-accuracy, low-noise, AEC-Q100-qualified LDOs for functional safety–enabled automotive subsystems-including infotainment, ADAS, and body electronics.
FAQ
What is the maximum dropout voltage specification for TPS78411QWDRBRQ1 at full 300-mA load?
The TPS78411QWDRBRQ1 has a maximum dropout voltage of 115 mV at 300 mA output current and 3.3 V output voltage, measured under conditions where VOUT = 0.95 × VOUT(nom). This value is specified for the DRB (VSON-8) package and applies across the full –40°C to +150°C junction temperature range.
Does TPS78411QWDRBRQ1 support adjustable output voltage configurations?
No, TPS78411QWDRBRQ1 is a fixed-output 1.1-V variant. It does not include a feedback (FB) pin and is not configurable via external resistors. Adjustable versions of the TPS784-Q1 family use different part numbers (e.g., TPS78412QWDRBRQ1 for 1.2 V adjustable) and feature distinct pinouts with FB functionality.
How does the active output discharge function operate in TPS78411QWDRBRQ1?
When the EN pin is driven low, TPS78411QWDRBRQ1 activates an internal pulldown circuit between OUT and GND, discharging the output capacitor rapidly. The pulldown resistance is 120 Ω at 3.3 V input, ensuring sub-millisecond discharge of typical 1-µF output capacitors-critical for preventing back-powering and enabling deterministic power-down sequencing.
Is TPS78411QWDRBRQ1 qualified for ASIL-B functional safety applications?
Yes, TPS78411QWDRBRQ1 is functional safety-capable with documented FIT rate, failure mode analysis, and diagnostic coverage metrics provided by Texas Instruments. While the device itself is not ASIL-B certified, its safety documentation supports integration into ASIL-B systems per ISO 26262, enabling reuse in safety-related automotive designs without requalification.
What thermal performance can be expected from TPS78411QWDRBRQ1 in the VSON-8 package?
In the wettable flank VSON-8 (DRB) package, TPS78411QWDRBRQ1 achieves a junction-to-board thermal resistance (RθJB) of 34.3°C/W and junction-to-ambient (RθJA) of 61.8°C/W with standard JEDEC 2-layer board layout. With proper GND plane connectivity to the thermal pad, it sustains 300 mA continuous output at +125°C ambient without thermal shutdown.
TPS78411QWDRBRQ1 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):
- 1.1V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.775V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 40 µA
- Current - Supply (Max):
- -
- 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, Wettable Flank
- Supplier Device Package:
- 8-SON (3x3)
TPS78411QWDRBRQ1 FAQ
1.How can I place an order for TPS78411QWDRBRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS78411QWDRBRQ1 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 TPS78411QWDRBRQ1 reliable?
The price and inventory of TPS78411QWDRBRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS78411QWDRBRQ1 is usually 5 days.
3.What payment methods are accepted for TPS78411QWDRBRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS78411QWDRBRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS78411QWDRBRQ1?
TPS78411QWDRBRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS78411QWDRBRQ1 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 TPS78411QWDRBRQ1?
For technical support, including TPS78411QWDRBRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS78411QWDRBRQ1 requirements.
6.How does Aetrix verify that TPS78411QWDRBRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS78411QWDRBRQ1 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 TPS78411QWDRBRQ1 meets industry standards.
7.What is the process for return or replacement of TPS78411QWDRBRQ1?
All TPS78411QWDRBRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS78411QWDRBRQ1, 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 TPS78411QWDRBRQ1 part is unused and in its original packaging.
Return procedure for TPS78411QWDRBRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS78411QWDRBRQ1 Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
