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Texas Instruments TPS389050QDSERQ1
- Part No.:
- TPS389050QDSERQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 6-WFDFN
- Datasheet:
-
TPS389050QDSERQ1.pdf
- Description:
- TPS3890-Q1 - AUTOMOTIVE LOW-QUIE
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TPS389050QDSERQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-grade voltage supervisor IC that monitors 5.0 V system rails with ±1% threshold accuracy (VITN = 4.80 V, VITP = 4.828 V), asserts an open-drain RESET signal on undervoltage or manual reset assertion, and supports user-programmable delay from 25 µs to 30 s via external CT capacitor - deployed in infotainment head units and ADAS camera power sequencing.
For engineers reviewing the TPS389050QDSERQ1 datasheet, TPS389050QDSERQ1 pinout, TPS389050QDSERQ1 application, or TPS389050QDSERQ1 equivalent, key selection criteria include its 2.1 µA quiescent current, –40°C to +125°C operating range, WSON-6 package, 1.5 mm × 1.5 mm footprint, and precision hysteresis for noise-immune rail monitoring in safety-critical automotive subsystems.
Technical Context
The TPS389050QDSERQ1 implements a precision bandgap reference and comparator architecture to achieve ±1% threshold accuracy across –40°C to +125°C, with fixed 5.0 V nominal detection (VITN = 4.80 V, VITP = 4.828 V) and 0.575% typical hysteresis. Its CT pin uses a 1.15 µA internal current source charging a user-supplied capacitor to set the rising-edge RESET delay time.
It operates from 1.5 V to 5.5 V supply (VDD), accepts SENSE inputs up to 5.5 V independent of VDD, features MR input with 0.25 × VDD logic-low threshold, and drives RESET as an open-drain output requiring external pullup - supporting multi-rail monitoring and compatibility with diverse microcontroller reset inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Threshold | 5.0 V - factory-set fixed detection point for 5 V supply rails |
| Threshold Accuracy | ±1% max - ensures reliable reset assertion/deassertion across temperature and voltage |
| Quiescent Current | 2.1 µA typical - enables always-on monitoring in battery-backed automotive modules |
| RESET Delay Range | 25 µs to 30 s - programmable via external capacitor on CT pin for system-specific timing |
| Operating Temp | –40°C to +125°C - qualified per AEC-Q100 Grade 1 for under-hood and cockpit applications |
| Package | WSON-6 (1.5 mm × 1.5 mm) - space-constrained PCB layout with thermal pad for automotive reliability |
| Output Type | Open-drain RESET - allows level-shifting pullup to any rail ≤5.5 V, compatible with diverse MCU reset inputs |
Pinout & Package
TPS389050QDSERQ1 is housed in a thermally enhanced 6-pin WSON package (1.5 mm × 1.5 mm body, 0.5 mm pitch) with exposed thermal pad for improved heat dissipation in automotive environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: SENSE | Monitor input | Connects directly to 5.0 V rail; asserts RESET when voltage drops below 4.80 V |
| 2: GND | Ground reference | System ground return for internal reference and comparator; must be low-impedance |
| 3: MR | Manual reset input | Active-low logic input; driving low forces immediate RESET assertion regardless of SENSE |
| 4: VDD | Supply input | Power source (1.5–5.5 V); powers internal circuitry and sets MR logic thresholds |
| 5: CT | Delay timing terminal | Connects to ground-referenced capacitor; sets RESET deassertion delay via 1.15 µA charge current |
| 6: RESET | Open-drain output | Drives low during fault; requires external pullup (10 kΩ–1 MΩ) to target reset rail voltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation with HBM ±2 kV / CDM ±750 V ESD robustness |
| Precision threshold accuracy | ±1% max over full temperature range - eliminates need for calibration in production |
| Ultra-low quiescent current | 2.1 µA typical - extends battery life in always-on vehicle modules (e.g., telematics, gateway) |
| Programmable reset delay | 25 µs to 30 s via single external capacitor - replaces multiple fixed-delay supervisors |
| SENSE input voltage range | 0 V to 5.5 V independent of VDD - enables direct monitoring of higher-voltage rails without dividers |
| Open-drain RESET output | Compatible with 1.2 V to 5.5 V pullup rails - simplifies interface to mixed-voltage SoCs and MCUs |
Applications
| Infotainment Head Unit | ADAS Camera Module |
|---|---|
|
Use Scenario: Monitors 5.0 V power rail supplying display controller, audio codec, and USB PHY in automotive infotainment systems. IC Role / Device Role / Timing Role: Voltage supervisor asserting RESET during cold cranking dips or load dump transients to prevent MCU lockup. Use Value: 1% threshold accuracy ensures deterministic reset at 4.80 V, while 2.1 µA quiescent current minimizes parasitic drain during vehicle sleep mode. |
Use Scenario: Ensures clean power-up sequencing for image sensor, ISP, and MIPI transmitter in forward-facing ADAS cameras. IC Role / Device Role / Timing Role: Supervises 5.0 V analog supply; holds RESET asserted until rail stabilizes and CT delay expires post-power-on. Use Value: Programmable 30 s max delay accommodates slow-ramping camera power supplies, avoiding premature MCU release. |
| Hybrid/Digital Cluster | Automotive Gateway |
|
Use Scenario: Guards against brownout-induced corruption in TFT-LCD driver and CAN-FD communication ICs powered by 5.0 V domain. IC Role / Device Role / Timing Role: Detects undervoltage on main cluster supply and triggers system-wide reset via shared RESET net. Use Value: Open-drain RESET allows wired-OR with other supervisors; MR pin enables software-initiated diagnostics reset. |
Use Scenario: Supervises 5.0 V rail feeding Ethernet PHY, LIN transceivers, and secure boot MCU in central vehicle gateway. IC Role / Device Role / Timing Role: Provides fail-safe reset during ignition cycling and supports manual reset for firmware update recovery. Use Value: –40°C to +125°C operation guarantees functionality across engine bay mounting locations and extended thermal soak. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS389050G-Q1 | VITN = 4.65 V (lower trip point), same package and delay capability | Better suited for 5.0 V rails with tighter tolerance or higher ripple margin | Select when system requires earlier reset assertion before 4.80 V threshold is crossed |
| TPS389050L-Q1 | VITN = 4.40 V (lowest trip point in family), identical pinout and timing | Targeted at legacy 5.0 V designs with wider regulation specs or aging power supplies | Choose for backward compatibility where 4.80 V trip causes nuisance resets |
Compared with TPS389050QDSERQ1, TPS389050G-Q1 offers earlier reset initiation for marginal 5 V rails, while TPS389050L-Q1 provides maximum immunity to transient dips - both retain identical WSON-6 packaging, CT-based delay programming, and AEC-Q100 Grade 1 qualification.
Availability
TPS389050QDSERQ1 is available at Aetrix Electronics and suitable for infotainment head units, ADAS camera modules, hybrid/digital clusters, automotive gateways, and telematics control units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TPS389050QDSERQ1 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 electronics, power management, and precision analog solutions.
The TPS3890-Q1 product line delivers ultra-low-power, high-accuracy voltage supervision for automotive subsystems demanding AEC-Q100 compliance, extended temperature operation, and flexible reset timing - targeting infotainment, ADAS, and body electronics.
FAQ
What is the exact threshold voltage specification for TPS389050QDSERQ1?
The TPS389050QDSERQ1 has a fixed negative threshold voltage (VITN) of 4.80 V and positive threshold voltage (VITP) of 4.828 V, with ±1% maximum accuracy over –40°C to +125°C. This corresponds to a nominal 5.0 V rail supervision point, and hysteresis is 0.575% typical - ensuring clean, bounce-free RESET assertion and deassertion during rail transitions.
How is the reset delay time programmed on TPS389050QDSERQ1?
The reset delay time on TPS389050QDSERQ1 is set by connecting an external capacitor between the CT pin and GND. The device uses a 1.15 µA internal current source to charge the capacitor; delay time follows tPD(r) = CCT × 1.07 + 25 µs (nominal). Capacitor values from 0 µF (25 µs min) to 26 µF (30 s max) are supported, and ceramic capacitors are recommended to minimize leakage effects.
Does TPS389050QDSERQ1 require an external pullup resistor on the RESET pin?
Yes, TPS389050QDSERQ1 features an open-drain RESET output and requires an external pullup resistor (10 kΩ to 1 MΩ) connected to the target reset rail voltage (≤5.5 V). The pullup value affects rise time and noise immunity; lower values improve speed but increase static current, while higher values reduce power but may degrade noise margin - 100 kΩ is commonly used for balanced performance.
Can TPS389050QDSERQ1 monitor voltages other than 5.0 V?
No - TPS389050QDSERQ1 is a fixed-threshold variant configured specifically for 5.0 V rail supervision (VITN = 4.80 V). For other rails, TI offers alternatives like TPS389018-Q1 (1.8 V), TPS389033-Q1 (3.3 V), or the adjustable TPS389001-Q1. The SENSE pin accepts inputs up to 5.5 V, but internal threshold is factory-trimmed and not user-modifiable on this part number.
What automotive qualification does TPS389050QDSERQ1 meet?
TPS389050QDSERQ1 is AEC-Q100 qualified for Grade 1 operation (–40°C to +125°C ambient), with HBM ESD rating of ±2000 V and CDM rating of ±750 V. It meets automotive reliability requirements for use in infotainment, ADAS, cluster, and gateway applications, and is manufactured in TI's IATF 16949-certified facilities with full traceability and PPAP support.
TPS389050QDSERQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 6-WFDFN
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 5V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- -
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-WSON (1.5x1.5)
TPS389050QDSERQ1 FAQ
1.How can I place an order for TPS389050QDSERQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS389050QDSERQ1 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 TPS389050QDSERQ1 reliable?
The price and inventory of TPS389050QDSERQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS389050QDSERQ1 is usually 5 days.
3.What payment methods are accepted for TPS389050QDSERQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS389050QDSERQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS389050QDSERQ1?
TPS389050QDSERQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS389050QDSERQ1 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 TPS389050QDSERQ1?
For technical support, including TPS389050QDSERQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS389050QDSERQ1 requirements.
6.How does Aetrix verify that TPS389050QDSERQ1 is sourced from the original manufacturer or authorized distributors?
All TPS389050QDSERQ1 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 TPS389050QDSERQ1 meets industry standards.
7.What is the process for return or replacement of TPS389050QDSERQ1?
All TPS389050QDSERQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS389050QDSERQ1, 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 TPS389050QDSERQ1 part is unused and in its original packaging.
Return procedure for TPS389050QDSERQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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