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Texas Instruments TPS3703A7120DSERQ1
- Part No.:
- TPS3703A7120DSERQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 6-WFDFN
- Datasheet:
-
TPS3703A7120DSERQ1.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 6WSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,305
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Product details
Overview
TPS3703A7120DSERQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-grade overvoltage and undervoltage reset IC in a 6-pin WSON package, featuring ±0.7% threshold accuracy over –40°C to +125°C, 7 µA max quiescent current, fixed 1.2 V UV/1.25 V OV window thresholds, and 10 ms / 200 ms dual fixed time delay options. It monitors low-voltage rails in ADAS domain controllers and digital cockpits where narrow supply margins demand high-precision supervision.
For engineers reviewing the TPS3703A7120DSERQ1 datasheet, TPS3703A7120DSERQ1 pinout, TPS3703A7120DSERQ1 application, or TPS3703A7120DSERQ1 equivalent, key selection considerations include its integrated resistor-divider architecture eliminating external components, open-drain active-low RESET with latching behavior, CT pin programmability for timing flexibility, and functional safety documentation support for ISO 26262-compliant systems.
Technical Context
The TPS3703A7120DSERQ1 integrates two precision comparators with a trimmed internal resistor divider and reference to implement a fixed 1.2 V undervoltage (VIT−) and 1.25 V overvoltage (VIT+) window detector. Its CT pin supports dual fixed delays (10 ms when floating, 200 ms when tied to VDD via 10 kΩ) and capacitor-programmable delay down to 50 µs.
It operates across 1.7 V–5.5 V supply range with 4.5 µA typical IDD, features 0.55% typical hysteresis, and delivers glitch immunity of 3.5 µs on SENSE for both UV/OV events at 5% overdrive. The SENSE and VDD pins are physically separated to enable supply rail redundancy in safety-critical automotive systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.7 V to 5.5 V - supports direct connection to 1.8 V, 2.5 V, 3.3 V, and 5 V system rails without level shifting. |
| UV/OV Thresholds | 1.200 V UV (VIT−), 1.250 V OV (VIT+) - fixed window with ±0.7% accuracy over –40°C to +125°C enables tight margin monitoring. |
| Quiescent Current | 7 µA (max) - enables always-on supervision in battery-sensitive automotive modules without significant power penalty. |
| Reset Time Delay | 10 ms (CT open), 200 ms (CT = VDD) - factory-set dual delays eliminate external timing components and reduce BOM count. |
| Output Type | Open-drain active-low RESET - allows wired-OR configuration with other supervisors and interface flexibility across logic voltage domains. |
| Hysteresis | 0.55% of threshold - prevents false resets during supply ripple or noise transients within nominal operating window. |
| Glitch Immunity | 3.5 µs on SENSE pin - rejects short-duration supply disturbances without requiring external RC filtering. |
Pinout & Package
TPS3703A7120DSERQ1 uses a 1.50 mm × 1.50 mm, 6-pin WSON (DSE) package with wettable flanks for automated optical inspection. Thermal resistance RθJA is 184.2°C/W, supporting operation up to +125°C ambient in compact automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SENSE | Monitor input | Direct connection point for the supply rail under supervision; separate from VDD to enable redundant monitoring paths. |
| 2 - VDD | Power supply input | Provides bias for internal circuitry; requires local 0.1 µF ceramic decoupling per best practice. |
| 3 - CT | Capacitor time delay control | Selects between 10 ms (floating) and 200 ms (pulled to VDD) delays, or enables capacitor-programmed timing (50 µs–200 ms). |
| 4 - RESET | Active-low open-drain output | Drives low during UV/OV fault or MR assertion; requires external pull-up to define logic-high voltage level. |
| 5 - GND | Ground reference | Common return path for internal comparators, reference, and output stage; must be low-impedance. |
| 6 - MR | Manual reset input | Pull low (<0.3 V) to force immediate RESET assertion; internally pulled up to VDD when unconnected. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated resistor divider | Eliminates external threshold-setting resistors, improving accuracy, reducing solution size, and removing resistor tolerance error sources. |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C operation with HBM ESD Class 2 and CDM Class C7B - meets automotive reliability requirements. |
| Functional safety documentation | Includes FIT rate data, failure mode analysis, and diagnostic coverage reports to accelerate ISO 26262 ASIL-B system integration. |
| RESET latching output mode | Maintains asserted state until monitored voltage returns to valid window and reset delay expires - prevents premature release during recovery. |
| Internal glitch immunity & hysteresis | 3.5 µs SENSE glitch rejection and 0.55% threshold hysteresis ensure stable operation in electrically noisy vehicle environments. |
Applications
| ADAS Domain Controller Supervision | Digital Cockpit Power Sequencing |
|---|---|
|
Use Scenario: Monitors 1.2 V core supply of SoC in autonomous driving domain controller during cold cranking and load dump conditions. IC Role / Device Role / Timing Role: Window supervisor asserting RESET to halt processor execution when supply deviates beyond ±4.2% of nominal 1.2 V rail. Use Value: Prevents corrupted memory writes and undefined SoC behavior by enforcing strict voltage compliance before boot completion. |
Use Scenario: Controls power-up sequence of infotainment MCU, display driver, and audio codec in centralized digital cockpit module. IC Role / Device Role / Timing Role: Generates 10 ms delayed RESET pulse after 1.2 V rail stabilizes, enabling staggered initialization of subsystems. Use Value: Eliminates need for discrete RC timing networks and reduces layout area by 3.2 mm² versus discrete supervisor solutions. |
| HEV/EV Battery Management Interface | Automotive Infotainment System Reset |
|
Use Scenario: Supervises isolated 3.3 V auxiliary supply powering CAN FD transceivers and isolated ADCs in battery pack controller. IC Role / Device Role / Timing Role: Detects overvoltage events above 1.25 V on scaled-down sense signal; asserts latched RESET to isolate communication path. Use Value: Provides fail-safe shutdown independent of main microcontroller, meeting ASIL-D fault containment requirements. |
Use Scenario: Resets head unit application processor following brownout caused by HVAC compressor engagement in 12 V system. IC Role / Device Role / Timing Role: Triggers 200 ms RESET hold time after 1.2 V rail recovers, ensuring full firmware reload before UI restart. Use Value: Guarantees deterministic recovery without user intervention, improving perceived system robustness in production vehicles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3703A5120DSERQ1 | Fixed 0.5 V UV / 0.55 V OV window; identical package, timing, and accuracy specs. | Targets ultra-low-voltage FPGA I/O banks or ASIC core rails below 0.6 V. | Select when supervising sub-0.6 V supplies; not interchangeable due to non-overlapping threshold ranges. |
| TLV809E25DBVR | Single-channel 2.5 V reset IC with 200 ms delay; no overvoltage detection, no CT pin, SOT-23-3 package. | Only provides undervoltage reset; lacks window supervision, manual reset, and automotive qualification. | Use only for cost-sensitive non-automotive applications requiring basic POR; no functional or pin compatibility. |
Compared with TPS3703A7120DSERQ1, the TPS3703A5120DSERQ1 offers identical architecture and automotive qualification but targets lower voltage rails, while TLV809E25DBVR sacrifices window detection, MR, and AEC-Q100 compliance for smaller size and lower cost in non-safety-critical roles.
Availability
TPS3703A7120DSERQ1 is available at Aetrix Electronics and suitable for ADAS domain controllers, digital cockpit modules, and HEV/EV battery management interfaces requiring stable component supply with automotive-grade traceability and long-term lifecycle support.
Supply support for TPS3703A7120DSERQ1 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 delivering analog and embedded processing solutions, with over 50 years of automotive IC experience and broad AEC-Q100-qualified portfolio.
The TPS3703-Q1 product line was designed specifically for functional safety-critical automotive voltage supervision, integrating precision window detection, redundancy-ready pinout, and ISO 26262-aligned documentation to simplify ASIL-B system certification.
FAQ
What is the exact undervoltage and overvoltage threshold for TPS3703A7120DSERQ1?
The TPS3703A7120DSERQ1 has a fixed undervoltage threshold (VIT−) of 1.200 V and overvoltage threshold (VIT+) of 1.250 V, forming a 50 mV window. These values are trimmed at wafer test and maintain ±0.7% accuracy across –40°C to +125°C, as specified in the electrical characteristics table of the SBVS344D datasheet.
Does TPS3703A7120DSERQ1 require external resistors to set its voltage thresholds?
No, TPS3703A7120DSERQ1 does not require external resistors. Its 1.200 V UV and 1.250 V OV thresholds are implemented using laser-trimmed internal resistors and a precision reference, eliminating component count, board space, and accuracy degradation from external resistor tolerances.
How is the reset time delay configured on TPS3703A7120DSERQ1?
The TPS3703A7120DSERQ1 supports dual fixed delays via the CT pin: 10 ms when left floating, and 200 ms when pulled to VDD through a 10 kΩ resistor. It also supports capacitor-programmable delay (50 µs–200 ms) by connecting a capacitor from CT to GND, as detailed in Section 7.6 of the datasheet.
Is TPS3703A7120DSERQ1 qualified for automotive use?
Yes, TPS3703A7120DSERQ1 is AEC-Q100 Grade 1 qualified for –40°C to +125°C ambient operation, with HBM ESD Class 2 (±2 kV) and CDM Class C7B (±500 V). It also includes functional safety documentation to support ISO 26262 ASIL-B system development.
What is the purpose of the separate SENSE and VDD pins on TPS3703A7120DSERQ1?
The separate SENSE and VDD pins on TPS3703A7120DSERQ1 enable physical redundancy: SENSE monitors the target supply rail (e.g., 1.2 V core), while VDD powers the IC from a different source (e.g., 3.3 V always-on rail). This separation ensures supervision remains active even if the monitored rail collapses completely.
TPS3703A7120DSERQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 6-WFDFN
- 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:
- 6-WSON (1.5x1.5)
TPS3703A7120DSERQ1 FAQ
1.How can I place an order for TPS3703A7120DSERQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3703A7120DSERQ1 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 TPS3703A7120DSERQ1 reliable?
The price and inventory of TPS3703A7120DSERQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3703A7120DSERQ1 is usually 5 days.
3.What payment methods are accepted for TPS3703A7120DSERQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3703A7120DSERQ1 transactions.
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TPS3703A7120DSERQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3703A7120DSERQ1 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 TPS3703A7120DSERQ1?
For technical support, including TPS3703A7120DSERQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3703A7120DSERQ1 requirements.
6.How does Aetrix verify that TPS3703A7120DSERQ1 is sourced from the original manufacturer or authorized distributors?
All TPS3703A7120DSERQ1 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 TPS3703A7120DSERQ1 meets industry standards.
7.What is the process for return or replacement of TPS3703A7120DSERQ1?
All TPS3703A7120DSERQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3703A7120DSERQ1, 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 TPS3703A7120DSERQ1 part is unused and in its original packaging.
Return procedure for TPS3703A7120DSERQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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