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Texas Instruments TPS3703A4120DSERQ1
- Part No.:
- TPS3703A4120DSERQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 6-WFDFN
- Datasheet:
-
TPS3703A4120DSERQ1.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 6WSON
- Quantity:
- Payment:
- Shipping:
Inventory:16,129
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Product details
Overview
TPS3703A4120DSERQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-grade overvoltage and undervoltage reset IC in a 6-pin WSON (DSE) package. It monitors supply rails from 1.7 V to 5.5 V with ±0.7% threshold accuracy across –40°C to +125°C, fixed 1.2 V UV/1.4 V OV window thresholds, and 10 ms / 200 ms dual fixed time delays selectable via CT pin configuration. It serves as a safety-critical voltage supervisor in ADAS domain controllers.
For engineers reviewing the TPS3703A4120DSERQ1 datasheet, TPS3703A4120DSERQ1 pinout, TPS3703A4120DSERQ1 application, or TPS3703A4120DSERQ1 equivalent, key selection considerations include its ±0.7% window threshold accuracy over temperature, 7 µA max quiescent current, open-drain active-low RESET output with latching behavior, manual reset (MR) support, and integrated glitch immunity for automotive power-rail monitoring.
Technical Context
The TPS3703A4120DSERQ1 integrates two precision comparators with a trimmed internal resistor divider and reference to implement a fixed 1.2 V undervoltage (VIT−) and 1.4 V overvoltage (VIT+) window detector - derived from the "A4120" nomenclature (A = time delay option A; 4120 = 1.2 V UV / 1.4 V OV). It uses no external resistors for threshold setting, eliminating external component error sources.
Its CT pin supports three timing modes: floating (10 ms), pulled to VDD via 10 kΩ (200 ms), or capacitor-programmable (0.1–1000 nF range). The SENSE and VDD pins are physically separated to enable redundant monitoring architectures required in ASIL-B/C systems, and RESET output remains latched low until both SENSE re-enters the valid window and the full tD delay expires.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.7 V to 5.5 V - supports direct connection to low-voltage automotive rails including 1.8 V, 2.5 V, 3.3 V, and 5 V domains. |
| UV/OV Thresholds | 1.2 V (UV) / 1.4 V (OV) - fixed window with ±0.7% accuracy over –40°C to +125°C ensures reliable detection under wide thermal stress. |
| Quiescent Current | 7 µA (max) - enables always-on supervision in battery-sensitive applications like ADAS camera modules without significant drain. |
| Reset Time Delay | 10 ms (CT open) / 200 ms (CT to VDD) - factory-configured dual fixed delays eliminate need for external timing components. |
| Output Type | Open-drain active-low RESET with latching - holds low until SENSE returns within window AND tD completes, preventing premature release. |
| Hysteresis | 0.3% to 0.8% of threshold - built-in comparator hysteresis prevents oscillation during slow-ramping or noisy supply transitions. |
| Glitch Immunity | 3.5 µs (SENSE), 25 ns (MR) - rejects short-duration transients on monitored rail or manual reset line per AEC-Q100 requirements. |
Pinout & Package
TPS3703A4120DSERQ1 is housed in a 1.50 mm × 1.50 mm, 6-pin WSON (DSE) package with wettable flanks, optimized for automated optical inspection (AOI) in automotive PCB assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SENSE | Monitor input | Direct connection point for the supply rail under supervision; internally referenced to precision bandgap - no external divider needed. |
| 2 - VDD | Power supply input | Independent bias rail enabling redundancy: allows SENSE and VDD to be sourced from separate supplies for fault isolation. |
| 3 - CT | Capacitor time delay control | Selects between 10 ms (floating) or 200 ms (10 kΩ to VDD); also accepts external capacitor (0.1–1000 nF) for programmable delay. |
| 4 - RESET | Active-low open-drain output | Latches low on UV/OV event; requires external pull-up to logic-compatible voltage (e.g., 1.8 V, 3.3 V, or 5 V) for interfacing with processors or PMICs. |
| 5 - GND | Ground reference | Dedicated analog ground return path; must be connected to low-impedance system ground plane for noise immunity. |
| 6 - MR | Manual reset input | Pulled high internally (100 kΩ); driven low (<0.3 V) to force immediate RESET assertion - used for system-level hard reset or power sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation with HBM ±2 kV / CDM ±500 V ESD robustness - meets automotive electronics reliability standards. |
| Functional Safety-Capable documentation | TI provides FIT rate data, failure mode analysis, and safety manual - supports ISO 26262 ASIL B/C system-level FMEDA and safety case development. |
| Internal precision resistor network | Eliminates external voltage-divider resistors - removes 0.1%–1% tolerance error sources and reduces BOM count, PCB area, and long-term drift risk. |
| Redundant SENSE/VDD architecture | Enables dual-supply monitoring schemes where SENSE tracks a critical core rail while VDD powers the supervisor - improves fault coverage for ISO 26262. |
| RESET latching behavior | Prevents spurious release during marginal supply recovery - output stays asserted until SENSE stabilizes within window AND full tD elapses, ensuring deterministic reset hold time. |
Applications
| ADAS Camera Module Power Supervision | Automotive Domain Controller Reset Management |
|---|---|
|
Use Scenario: Monitors 1.2 V core supply of image signal processor (ISP) in rear-view camera module during cold cranking and load dump events. IC Role / Device Role / Timing Role: Window supervisor asserting RESET when supply drops below 1.2 V or exceeds 1.4 V; 10 ms delay prevents false triggers during transient dips. Use Value: Ensures ISP only operates within validated voltage margin, eliminating corrupted frame capture or firmware lockup due to undervoltage. |
Use Scenario: Supervises 3.3 V I/O rail of central ADAS domain controller during ignition cycling and CAN bus wake-up sequences. IC Role / Device Role / Timing Role: Dual-threshold detector with 200 ms delay (CT tied to VDD) providing extended reset hold time after brownout recovery. Use Value: Guarantees full initialization of multi-core SoC and peripheral interfaces before software boot begins, preventing race conditions. |
| Digital Cockpit Cluster Microcontroller Reset | HEV/EV Battery Management System (BMS) MCU Watchdog |
|
Use Scenario: Validates 1.8 V GPU core supply in digital instrument cluster during rapid thermal cycling in dashboard environments. IC Role / Device Role / Timing Role: Fixed-window supervisor with ±0.7% accuracy maintaining detection integrity at 125°C junction temperature. Use Value: Prevents graphical artifacts or display blackouts caused by marginal GPU voltage, improving driver information system reliability. |
Use Scenario: Monitors 2.5 V auxiliary supply powering BMS microcontroller during high-current discharge phases in hybrid powertrain. IC Role / Device Role / Timing Role: Latching RESET output ensures MCU remains held in reset until supply fully recovers and stabilizes post-transient. Use Value: Avoids unsafe MCU execution during unstable power conditions - critical for functional safety compliance in ASIL-D subsystems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV809E25DBVRQ1 | Single-channel undervoltage-only detector (2.5 V threshold); no overvoltage detection, no CT programmability, no latching. | Suitable only for basic POR/UVLO; cannot replace window supervision or handle overvoltage faults in safety-critical rails. | Choose only if system design separates UV and OV monitoring functions and tolerates non-latching behavior. |
| TPS3851G18QDRQ1 | Higher-accuracy (±0.5% typ) window supervisor with adjustable thresholds via external resistors; supports 1.8 V UV/2.0 V OV but requires 4 external components. | Offers tighter accuracy and flexibility but increases BOM cost, layout area, and calibration complexity versus TPS3703A4120DSERQ1's resistorless design. | Select when absolute threshold precision > ±0.5% is required and external resistor tolerance budget permits added design overhead. |
Compared with TLV809E25DBVRQ1 and TPS3851G18QDRQ1, the TPS3703A4120DSERQ1 uniquely delivers fixed 1.2 V/1.4 V window detection with zero external components, dual fixed time delays, latching RESET, and AEC-Q100 Grade 1 qualification - making it optimal for compact, high-reliability automotive voltage monitoring where space, BOM simplicity, and functional safety are prioritized.
Availability
TPS3703A4120DSERQ1 is available at Aetrix Electronics and suitable for advanced driver assistance systems (ADAS), automotive digital cockpits, and HEV/EV battery management systems requiring stable component supply with automotive-grade traceability and long-term lifecycle support.
Supply support for TPS3703A4120DSERQ1 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 electronics and functional safety solutions.
The TPS3703-Q1 product line was designed specifically for ASIL-B/C automotive voltage supervision - integrating precision window detection, low-power operation, and AEC-Q100-compliant reliability into the industry's smallest 6-pin WSON package.
FAQ
What is the exact undervoltage and overvoltage threshold for TPS3703A4120DSERQ1?
The TPS3703A4120DSERQ1 has a fixed undervoltage threshold of 1.2 V and overvoltage threshold of 1.4 V, forming a 200 mV window. These values are factory-trimmed and specified with ±0.7% accuracy across –40°C to +125°C ambient temperature, as confirmed in TI's SBVS344D datasheet Section 7.5.
How does the CT pin configure the reset time delay on TPS3703A4120DSERQ1?
The CT pin on TPS3703A4120DSERQ1 selects between two fixed delays: 10 ms when left floating, and 200 ms when pulled to VDD via a 10 kΩ resistor. It does not support capacitor programming in this variant - the "A" suffix denotes the fixed-delay option, unlike "C" or "D" variants which enable capacitor-based adjustment.
Is TPS3703A4120DSERQ1 qualified for automotive use, and what grade does it meet?
Yes, TPS3703A4120DSERQ1 is AEC-Q100 qualified for automotive applications at Grade 1 (–40°C to +125°C TA), with HBM ±2 kV and CDM ±500 V ESD ratings. It also carries functional safety documentation supporting ISO 26262 ASIL B/C system integration, as stated in the device features and revision history of SBVS344D.
Does TPS3703A4120DSERQ1 require external resistors to set its voltage thresholds?
No, TPS3703A4120DSERQ1 does not require external resistors. Its 1.2 V UV and 1.4 V OV thresholds are implemented using precision internal trimmed resistors and a bandgap reference - eliminating external component error, reducing PCB area, and improving long-term stability per TI's description in Section 3 and 8.3.2.
What is the function of the SENSE and VDD pins being separate on TPS3703A4120DSERQ1?
The separate SENSE and VDD pins on TPS3703A4120DSERQ1 enable architectural redundancy: SENSE can monitor a critical core rail (e.g., 1.2 V ISP supply) while VDD is powered from a different source (e.g., 3.3 V system rail). This separation improves fault coverage for ISO 26262 compliance and prevents single-point failures from disabling supervision.
TPS3703A4120DSERQ1 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)
TPS3703A4120DSERQ1 FAQ
1.How can I place an order for TPS3703A4120DSERQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3703A4120DSERQ1 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 TPS3703A4120DSERQ1 reliable?
The price and inventory of TPS3703A4120DSERQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3703A4120DSERQ1 is usually 5 days.
3.What payment methods are accepted for TPS3703A4120DSERQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3703A4120DSERQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS3703A4120DSERQ1?
TPS3703A4120DSERQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3703A4120DSERQ1 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 TPS3703A4120DSERQ1?
For technical support, including TPS3703A4120DSERQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3703A4120DSERQ1 requirements.
6.How does Aetrix verify that TPS3703A4120DSERQ1 is sourced from the original manufacturer or authorized distributors?
All TPS3703A4120DSERQ1 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 TPS3703A4120DSERQ1 meets industry standards.
7.What is the process for return or replacement of TPS3703A4120DSERQ1?
All TPS3703A4120DSERQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3703A4120DSERQ1, 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 TPS3703A4120DSERQ1 part is unused and in its original packaging.
Return procedure for TPS3703A4120DSERQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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