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Texas Instruments TPS3850G12QDRCRQ1
- Part No.:
- TPS3850G12QDRCRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TPS3850G12QDRCRQ1.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 10VSON
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TPS3850G12QDRCRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-grade precision voltage supervisor with integrated programmable window watchdog timer. It monitors supply rails from 0.9 V to 5.0 V with ±0.8% threshold accuracy over –40°C to +125°C, delivers 10 µA typical supply current, and features factory-programmed or capacitor-adjustable reset (703 µs–3.22 s) and watchdog timeouts. It serves as a safety-critical power-rail monitor and fault-detection enabler in ADAS domain controllers.
For engineers reviewing the TPS3850G12QDRCRQ1 datasheet, TPS3850G12QDRCRQ1 pinout, TPS3850G12QDRCRQ1 application, or TPS3850G12QDRCRQ1 equivalent, key selection criteria include its 0.8% voltage threshold accuracy across temperature, dual open-drain outputs (RESET/WDO), 10-pin VSON package with wettable flanks, and configurable watchdog window ratios (1/8, 1/2, 3/4) via SET0/SET1 logic inputs.
Technical Context
The TPS3850G12QDRCRQ1 implements a dual-comparator window architecture with trimmed internal resistor divider and precision reference to achieve ±0.8% overvoltage (VIT+(OV)) and undervoltage (VIT−(UV)) threshold accuracy from –40°C to +125°C. Its hysteresis is fixed at 0.5%, eliminating external components for noise immunity in tight-tolerance systems.
It integrates a state-machine-driven window watchdog with independent upper (tWDU) and lower (tWDL) timing boundaries, selectable via CWD capacitor or pullup resistor plus SET0/SET1 logic configuration. The dedicated WDO output asserts only when RESET is high, enabling fault classification by timing relationship between WDO assertion and system-level reset events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.6 V to 6.5 V - supports wide-input automotive power domains including 3.3 V, 5 V, and post-regulated low-voltage rails. |
| Voltage Threshold Accuracy | ±0.8% max over –40°C to +125°C - ensures reliable reset assertion before microcontroller VDD min/max limits are violated. |
| Supply Current (IDD) | 10 µA typical - enables always-on monitoring in battery-backed or low-power wake-up circuits without significant drain. |
| Reset Delay Range | 703 µs to 3.22 s - selectable via CRST capacitor (0.1–1000 nF) or factory defaults, meeting diverse MCU boot-time requirements. |
| Watchdog Window Ratios | 1/8, 1/2, 3/4 - configured by SET0/SET1 logic states, allowing precise tuning of fault detection sensitivity vs. false-trigger margin. |
| Output Type | Open-drain RESET and WDO - permits wired-OR interfacing, level-shifting, and flexible pullup to system rail voltages up to 6.5 V. |
| Package | 3.00 mm × 3.00 mm, 10-pin VSON with wettable flanks - supports automated optical inspection (AOI) and high-density automotive PCB layouts. |
Pinout & Package
TPS3850G12QDRCRQ1 is housed in a 3.00 mm × 3.00 mm, 10-pin Very Small Outline No-lead (VSON) package with exposed thermal pad connected internally to GND. Wettable flanks enable reliable solder-joint inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Accepts 1.6–6.5 V; requires 0.1-µF bypass capacitor for noise suppression in automotive environments. |
| GND | Ground reference | Common return path; thermal pad must be connected to large-area ground plane for thermal management. |
| SENSE | Monitored rail input | Directly connects to voltage rail (0.9–5.0 V); supports rail-to-rail sensing up to 6.5 V independent of VDD. |
| CWD | Watchdog timeout programming | Capacitor-to-GND sets tWDU/tWDL; 10-kΩ pullup selects factory defaults; unconnected enables disable mode. |
| SET0 / SET1 | Watchdog configuration control | Logic inputs selecting window ratio (1/8, 1/2, 3/4) or disabling watchdog; require VIH ≥ 0.8×VDD, VIL ≤ 0.25 V. |
| CRST | Reset timeout programming | Capacitor-to-GND sets tRST (703 µs–3.22 s); 10-kΩ pullup selects factory default (8.5–11.5 ms). |
| WDI | Watchdog trigger input | Falling edge must occur within tWDL–tWDU window; ignored when watchdog disabled or RESET/WDO asserted. |
| RESET | Supervisor reset output | Open-drain; asserts low on OV/UV fault; deasserts after tRST delay when SENSE returns to valid window. |
| WDO | Window watchdog output | Open-drain; asserts low only when RESET is high and WDI misses window; held low for full tRST duration. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation, HBM ±4 kV, CDM ±1 kV - meets automotive reliability and ESD robustness requirements. |
| Functional Safety-capable documentation | TI provides FIT rate data, failure mode analysis, and safety manual - supports ISO 26262 ASIL-B system-level certification efforts. |
| Precision window comparator | 0.8% threshold accuracy with 0.5% hysteresis - eliminates need for external trimming or calibration in safety-critical power monitoring. |
| Dedicated watchdog output (WDO) | Independent assertion timing relative to RESET - enables diagnostic distinction between power faults and software hangs. |
| Watchdog disable via logic pins | SET0/SET1 configuration disables watchdog during development - avoids spurious timeouts without hardware modification. |
| Wettable flank VSON package | Facilitates AOI-compatible solder-joint inspection - critical for zero-defect manufacturing in automotive electronics. |
Applications
| ADAS Domain Controller | Digital Cockpit Processing Unit |
|---|---|
|
Use Scenario: Monitors core SoC supply rails (e.g., 1.2 V VCORE, 1.8 V VI/O) during cold-start, load dump, and transient events. IC Role / Device Role / Timing Role: Precision voltage supervisor and window watchdog enforcing safe boot sequence and runtime fault detection. Use Value: Prevents undefined SoC behavior by asserting RESET before VDD violates processor spec limits, and uses WDO to detect firmware lockup independent of power rail integrity. |
Use Scenario: Ensures reliable startup and continuous operation of multi-core application processors powering instrument clusters and infotainment displays. IC Role / Device Role / Timing Role: Dual-role supervisor: resets processor on rail collapse, and triggers diagnostic logging via WDO on missed watchdog pulses. Use Value: Enables deterministic recovery from both hardware-level power faults and software-level hangs-critical for ASIL-B cockpit safety goals. |
| Automotive Telematics Control Unit | On-board Charger (OBC) Control Module |
|
Use Scenario: Guards 3.3 V and 5 V rails powering cellular modems, GNSS receivers, and CAN transceivers in always-connected modules. IC Role / Device Role / Timing Role: High-accuracy rail monitor with ultra-low IDD (10 µA) enabling persistent supervision during vehicle sleep modes. Use Value: Maintains fault visibility across ignition cycles without compromising battery drain budget-supports ULP telematics compliance. |
Use Scenario: Supervises isolated DC-DC converter outputs and microcontroller supplies in high-voltage OBC power stages. IC Role / Device Role / Timing Role: Safety-redundant voltage monitor with watchdog, interfacing to isolation barriers and functional safety MCUs. Use Value: Meets ISO 26262 requirements for electric vehicle charging systems by providing independent, AEC-Q100-certified fault detection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor with window watchdog applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3851G12QDRCRQ1 | Includes integrated 12-bit ADC for rail telemetry; higher IDD (25 µA); same pinout and watchdog functionality. | Required where real-time voltage measurement (not just threshold violation) is needed for predictive diagnostics. | Select when ADC telemetry adds value; otherwise TPS3850G12QDRCRQ1 offers lower power and cost for pure supervisory use. |
| MAX6373HATA+T | Fixed 3.3 V reset threshold; no window watchdog; 1.5% accuracy; SOIC-8 package; non-automotive qualified. | Suitable only for non-safety-critical, single-rail, non-automotive applications with relaxed accuracy and no watchdog need. | Not recommended for automotive or ADAS use; lacks AEC-Q100, window watchdog, and 0.8% accuracy required by TPS3850G12QDRCRQ1 applications. |
Compared with TPS3850G12QDRCRQ1, TPS3851G12QDRCRQ1 adds telemetry capability at higher power cost, while MAX6373HATA+T omits critical automotive and watchdog features-making TPS3850G12QDRCRQ1 the optimal choice for AEC-Q100-compliant window supervision.
Availability
TPS3850G12QDRCRQ1 is available at Aetrix Electronics and suitable for ADAS domain controllers, digital cockpit processing units, and automotive telematics control units requiring stable component supply with full automotive qualification traceability.
Supply support for TPS3850G12QDRCRQ1 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, embedded processing, and automotive ICs, with decades of leadership in high-reliability power management solutions.
The TPS3850-Q1 product line delivers AEC-Q100 Grade 1 voltage supervisors with integrated window watchdogs for functional safety–critical automotive subsystems including ADAS, cockpit, and electrification control modules.
FAQ
What is the operating temperature range for the TPS3850G12QDRCRQ1?
The TPS3850G12QDRCRQ1 is qualified per AEC-Q100 Grade 1 with an ambient operating temperature range of –40°C to +125°C. This rating applies to the full device functionality-including voltage threshold accuracy, watchdog timing, and reset delay-ensuring reliable operation in under-hood and other harsh automotive environments where the TPS3850G12QDRCRQ1 is deployed.
How does the TPS3850G12QDRCRQ1 implement window watchdog functionality?
The TPS3850G12QDRCRQ1 implements a true window watchdog using independent upper (tWDU) and lower (tWDL) timing boundaries. A falling edge on WDI must occur strictly between these boundaries to prevent WDO assertion. The boundaries are set via CWD capacitor value and SET0/SET1 logic states, enabling ratios of 1/8, 1/2, or 3/4-providing precise fault-detection resolution not possible with standard timeout watchdogs.
Can the TPS3850G12QDRCRQ1 monitor voltage rails below 0.9 V?
No-the TPS3850G12QDRCRQ1 is specified for precision monitoring of rails from 0.9 V to 5.0 V. While the SENSE pin accepts voltages up to 6.5 V, the internal reference and trimmed resistor network are calibrated for accuracy only within the 0.9–5.0 V range. For sub-0.9 V rails, TI recommends the adjustable TPS3850H01QDRCRQ1 variant, which supports down to 0.4 V using external resistive dividers.
What is the purpose of the wettable flanks on the TPS3850G12QDRCRQ1 VSON package?
The wettable flanks on the TPS3850G12QDRCRQ1's 3-mm × 3-mm VSON package expose solderable metal along the side walls of the package body. This enables automated optical inspection (AOI) systems to verify solder joint quality and coplanarity-critical for zero-defect manufacturing in automotive electronics where field reliability is non-negotiable.
Does the TPS3850G12QDRCRQ1 support watchdog disable during firmware development?
Yes-the TPS3850G12QDRCRQ1 supports watchdog disable via logic configuration of SET0 and SET1 pins. When SET0 = 1 and SET1 = 0, the watchdog is fully disabled and WDI is ignored, preventing unintended timeouts during debug or bootloader development-without requiring hardware changes or external jumpers.
TPS3850G12QDRCRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.2V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VSON (3x3)
TPS3850G12QDRCRQ1 FAQ
1.How can I place an order for TPS3850G12QDRCRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3850G12QDRCRQ1 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 TPS3850G12QDRCRQ1 reliable?
The price and inventory of TPS3850G12QDRCRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3850G12QDRCRQ1 is usually 5 days.
3.What payment methods are accepted for TPS3850G12QDRCRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3850G12QDRCRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS3850G12QDRCRQ1?
TPS3850G12QDRCRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3850G12QDRCRQ1 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 TPS3850G12QDRCRQ1?
For technical support, including TPS3850G12QDRCRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3850G12QDRCRQ1 requirements.
6.How does Aetrix verify that TPS3850G12QDRCRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS3850G12QDRCRQ1 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 TPS3850G12QDRCRQ1 meets industry standards.
7.What is the process for return or replacement of TPS3850G12QDRCRQ1?
All TPS3850G12QDRCRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3850G12QDRCRQ1, 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 TPS3850G12QDRCRQ1 part is unused and in its original packaging.
Return procedure for TPS3850G12QDRCRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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