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Texas Instruments TPS3803-01QDCKRQ1
- Part No.:
- TPS3803-01QDCKRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
TPS3803-01QDCKRQ1.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:5,993
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Product details
Overview
TPS3803-01QDCKRQ1 from Texas Instruments is an automotive-grade adjustable voltage supervisor IC that monitors a single system supply via external resistor divider on the SENSE pin, with 1.226 V internal reference, ±1.5% threshold accuracy, open-drain RESET output, and 3 μA typical supply current at 3.3 V - used for reliable power-on reset assertion in DSP and microcontroller systems.
For engineers reviewing the TPS3803-01QDCKRQ1 datasheet, TPS3803-01QDCKRQ1 pinout, TPS3803-01QDCKRQ1 application, or TPS3803-01QDCKRQ1 equivalent, key selection considerations include its adjustable 1.226 V reference architecture, SC-70 (5-pin) package constraints, –40°C to 125°C automotive operating range, and open-drain output requiring external pull-up.
Technical Context
The TPS3803-01QDCKRQ1 implements a precision comparator with built-in 1.226 V reference and hysteresis (15 mV for thresholds <2.5 V), enabling stable detection of supply drops below user-defined thresholds set by external R1/R2 on SENSE. It asserts active-low RESET when VDD or SENSE falls below VIT and deasserts only after both recover above VIT + Vhys.
It features transient immunity against short negative spikes on VDD/SENSE pins, with minimum pulse duration vs. threshold overdrive defined per Figure 15–16; power-on reset initiates at VDD > 0.8 V, and it operates across 1.3 V to 6 V supply range with no internal regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Threshold Voltage | 1.226 V internal reference; enables monitoring of any rail ≥1.226 V via external resistor divider on SENSE pin |
| Threshold Accuracy | ±1.5% over –40°C to 125°C; ensures consistent reset point across automotive temperature extremes |
| Supply Current | 3 μA typical at VDD = 3.3 V; supports ultra-low-power always-on supervision in battery-backed systems |
| Reset Output Type | Open-drain; requires external pull-up resistor to define logic-high level and interface with diverse MCU reset inputs |
| Operating Temperature | –40°C to 125°C; qualified per AEC-Q100 Grade 1 for under-hood and infotainment applications |
| Hysteresis | 15 mV (for VIT < 2.5 V); prevents chatter during slow-rising/falling supply transitions near threshold |
| Package | 5-pin SC-70 (2.00 mm × 1.25 mm); enables high-density PCB layout in space-constrained automotive modules |
Pinout & Package
TPS3803-01QDCKRQ1 is housed in a 5-pin SC-70 (DCK) package with 2.00 mm × 1.25 mm body size and moisture sensitivity level 1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No internal connection | Must be left unconnected; no routing or grounding required |
| 2 (GND) | Ground reference | Primary return path for internal circuitry and RESET output sink current |
| 3 (RESET) | Active-low open-drain output | Sinks current when asserted; requires external pull-up to VDD or another logic rail |
| 4 (VDD) | Supply input and fixed-sense monitor | Power source (1.3–6 V); also monitored directly for undervoltage detection |
| 5 (SENSE) | Adjustable voltage sense input | Accepts scaled-down system rail via resistor divider; referenced to 1.226 V internal reference |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable threshold via resistor divider | Enables precise monitoring of any supply ≥1.226 V without custom IC variants |
| ±1.5% threshold accuracy over temperature | Guarantees deterministic reset behavior across full automotive operating range |
| 3 μA typical quiescent current | Minimizes standby power draw in always-on vehicle subsystems (e.g., telematics, ADAS sensors) |
| Transient immunity on VDD/SENSE | Rejects short-duration negative spikes (<100 ns) without false reset assertion |
| AEC-Q100 Grade 1 qualification | Validated for automotive use including engine control, cluster, and infotainment ECUs |
Applications
| Engine Control Unit (ECU) Power Monitoring | ADAS Camera Module Reset Supervision |
|---|---|
|
Use Scenario: Monitors 5-V or 3.3-V domain powering MCU and CAN transceiver in gasoline/diesel ECU. IC Role / Device Role / Timing Role: Asserts active-low RESET until main supply stabilizes post-ignition; holds processor in reset during brownout. Use Value: Prevents erratic MCU execution during cranking-induced voltage sag (down to ~6 V), ensuring deterministic boot sequence. |
Use Scenario: Supervises 1.8-V image sensor supply and 3.3-V ISP core rail in forward-facing camera module. IC Role / Device Role / Timing Role: Detects undervoltage on either rail and forces system reset before corrupted frame capture or processing. Use Value: Eliminates visual artifacts or communication loss caused by partial power failure in safety-critical vision systems. |
| Automotive Infotainment Head Unit | Digital Instrument Cluster |
|
Use Scenario: Ensures clean startup of ARM-based SoC and audio codec in center-stack display unit. IC Role / Device Role / Timing Role: Generates synchronized reset pulse after all LDO outputs reach regulation, using SENSE to monitor critical 1.1-V core rail. Use Value: Avoids firmware lockup or HDMI handshake failure due to out-of-sequence power sequencing. |
Use Scenario: Validates stability of 5-V backlight driver and 3.3-V microcontroller supply in TFT-based digital dashboard. IC Role / Device Role / Timing Role: Provides fail-safe reset independent of main PMIC, asserting RESET if either monitored rail dips below threshold. Use Value: Guarantees immediate display blanking and fault indication during power anomaly - meeting ASIL-B functional safety expectations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3803G15QDCKRQ1 | Fixed 1.4 V threshold on VDD pin; no SENSE pin - monitors only VDD directly | Used where only a single 1.5-V rail requires supervision without external resistors | Select when simplicity and BOM reduction outweigh need for adjustable threshold |
| TPS3805H33QDCKRQ1 | Dual-input (VDD + SENSE), push-pull RESET, fixed 3.05 V / 1.226 V thresholds | Required for simultaneous monitoring of 3.3-V main supply and secondary rail (e.g., 1.8-V I/O) | Choose when dual-rail supervision and active-high reset drive capability are mandatory |
Compared with TPS3803G15QDCKRQ1 and TPS3805H33QDCKRQ1, the TPS3803-01QDCKRQ1 uniquely supports user-defined thresholds down to 1.226 V via resistor divider while retaining the same SC-70 footprint and automotive qualification - making it optimal for non-standard supply voltages where fixed-threshold devices cannot meet design requirements.
Availability
TPS3803-01QDCKRQ1 is available at Aetrix Electronics and suitable for automotive engine control units, ADAS camera modules, infotainment head units, and digital instrument clusters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TPS3803-01QDCKRQ1 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, industrial, and power management solutions.
The TPS380x-Q1 family was designed specifically for automotive power-supply supervision - delivering high-accuracy, low-quiescent-current reset generation for safety-critical and always-on electronic control units.
FAQ
What is the function of the NC pin on TPS3803-01QDCKRQ1?
Pin 1 on the TPS3803-01QDCKRQ1 is designated NC (No Connection) and has no internal connection. It must remain unconnected - neither grounded nor routed - to avoid interference with internal circuit operation or thermal performance in the SC-70 package.
How do I configure TPS3803-01QDCKRQ1 to monitor a 2.5-V supply?
To monitor a 2.5-V supply with TPS3803-01QDCKRQ1, connect the supply to VDD and use a resistor divider (e.g., R1 = 24 kΩ, R2 = 30 kΩ) between the supply and GND, feeding the junction to the SENSE pin. This scales the voltage so that 2.5 V produces 1.226 V at SENSE, triggering reset below that threshold.
Does TPS3803-01QDCKRQ1 require an external pull-up resistor on the RESET pin?
Yes, TPS3803-01QDCKRQ1 features an open-drain RESET output and requires an external pull-up resistor (typically 4.7 kΩ to 10 kΩ) connected to a valid logic rail (e.g., VDD or MCU I/O voltage) to ensure proper high-level assertion when not actively driving low.
What is the minimum supply voltage required for TPS3803-01QDCKRQ1 to assert RESET?
The TPS3803-01QDCKRQ1 begins asserting RESET when VDD rises above 0.8 V during power-up. It continues monitoring VDD and SENSE thereafter, maintaining RESET low until both signals exceed their respective thresholds plus hysteresis.
Is TPS3803-01QDCKRQ1 compatible with lead-free reflow processes?
Yes, TPS3803-01QDCKRQ1 is RoHS-compliant with NIPDAUAG lead finish and rated for MSL Level-1 (260°C peak reflow, unlimited floor life), making it fully compatible with standard lead-free soldering profiles used in automotive electronics manufacturing.
TPS3803-01QDCKRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- Adjustable/Selectable
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 5µs Typical Propagation Delay
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
TPS3803-01QDCKRQ1 FAQ
1.How can I place an order for TPS3803-01QDCKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3803-01QDCKRQ1 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 TPS3803-01QDCKRQ1 reliable?
The price and inventory of TPS3803-01QDCKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3803-01QDCKRQ1 is usually 5 days.
3.What payment methods are accepted for TPS3803-01QDCKRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3803-01QDCKRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS3803-01QDCKRQ1?
TPS3803-01QDCKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3803-01QDCKRQ1 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 TPS3803-01QDCKRQ1?
For technical support, including TPS3803-01QDCKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3803-01QDCKRQ1 requirements.
6.How does Aetrix verify that TPS3803-01QDCKRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS3803-01QDCKRQ1 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 TPS3803-01QDCKRQ1 meets industry standards.
7.What is the process for return or replacement of TPS3803-01QDCKRQ1?
All TPS3803-01QDCKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3803-01QDCKRQ1, 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 TPS3803-01QDCKRQ1 part is unused and in its original packaging.
Return procedure for TPS3803-01QDCKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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