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Texas Instruments TPS3803G15QDCKRQ1
- Part No.:
- TPS3803G15QDCKRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
TPS3803G15QDCKRQ1.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,985
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Product details
Overview
TPS3803G15QDCKRQ1 from Texas Instruments is an automotive-grade, single-supply voltage supervisor IC with fixed 1.4 V threshold, open-drain active-low RESET output, and 3 μA typical supply current at 3.3 V. It monitors VDD only (no SENSE input), asserts RESET when VDD drops below 1.4 V, and deasserts upon recovery with built-in hysteresis. Used for reliable power-on reset in 1.5-V rail systems such as automotive infotainment microcontrollers.
For engineers reviewing the TPS3803G15QDCKRQ1 datasheet, TPS3803G15QDCKRQ1 pinout, TPS3803G15QDCKRQ1 application, or TPS3803G15QDCKRQ1 equivalent, key selection criteria include fixed 1.4 V detection accuracy (±1.5%), SC-70 package compatibility, –40°C to 125°C operation, open-drain output drive capability, and automotive AEC-Q100 qualification.
Technical Context
The TPS3803G15QDCKRQ1 implements a precision bandgap-based comparator with internal 1.4 V reference and 15 mV hysteresis to prevent false resets during supply transients. Its VDD-only monitoring architecture eliminates external resistor dividers, simplifying design for dedicated 1.5-V rail supervision.
RESET assertion occurs when VDD falls below 1.4 V; deassertion requires VDD to exceed 1.415 V due to hysteresis. Power-up reset initiates at VDD ≥ 0.8 V, and the device remains functional across 1.3 V to 6 V supply range with immunity to short negative transients on VDD.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Threshold Voltage | 1.4 V ±1.5% - ensures accurate 1.5-V rail monitoring with minimal undervoltage risk |
| Supply Current | 3 μA typical at 3.3 V - enables ultra-low-power operation in always-on automotive subsystems |
| Operating Temperature | –40°C to 125°C - qualified for under-hood and infotainment applications per AEC-Q100 |
| Reset Output Type | Open-drain active-low - allows wired-OR configuration and flexible pull-up voltage selection |
| Hysteresis | 15 mV - prevents oscillation during slow-rising or noisy supply rails |
| Propagation Delay | 5–100 μs - provides fast response to supply faults while filtering sub-microsecond noise |
| Package | 5-pin SC-70 (2.00 mm × 1.25 mm) - supports high-density PCB layouts in space-constrained modules |
Pinout & Package
TPS3803G15QDCKRQ1 is housed in a 5-pin SC-70 package (DCK), with pin 1 and pin 5 designated as no-connect (NC) terminals. The functional pins are GND (pin 2), RESET (pin 3), VDD (pin 4), and two NC pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 2) | Ground reference | Primary return path for internal circuitry and RESET output sink current |
| RESET (Pin 3) | Active-low open-drain output | Drives low when VDD < 1.4 V; requires external pull-up for logic-high state |
| VDD (Pin 4) | Supply and sense input | Monitors 1.5-V rail directly; powers internal circuitry and defines detection threshold |
| NC (Pin 1) | No internal connection | Must be left unconnected; not bonded or used internally |
| NC (Pin 5) | No internal connection | Must be left unconnected; not bonded or used internally |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive use from –40°C to 125°C ambient, supporting safety-critical reset functions |
| Fixed 1.4 V threshold with ±1.5% accuracy | Eliminates external resistor divider, reducing BOM count and layout sensitivity for 1.5-V systems |
| 3 μA typical supply current | Minimizes quiescent power draw in battery-backed or always-on vehicle modules |
| Transient immunity on VDD | Rejects short negative spikes (<100 ns, <100 mV overdrive) without false reset assertion |
| Power-up reset at 0.8 V | Ensures processor remains held in reset until sufficient supply headroom exists for stable operation |
Applications
| Automotive Infotainment MCU Reset | ADAS Camera Module Power Sequencing |
|---|---|
Use Scenario: Monitors 1.5-V core supply of SoC in head-unit display system during cold cranking and load dump events. IC Role / Device Role / Timing Role: Single-point voltage supervisor providing active-low reset signal to ARM Cortex-A processor. Use Value: Prevents firmware corruption by holding MCU in reset until 1.5-V rail stabilizes above 1.4 V with 15 mV hysteresis. |
Use Scenario: Ensures clean power-up of image sensor and ISP in forward-facing camera during ignition cycle. IC Role / Device Role / Timing Role: Dedicated supervisor for 1.5-V analog/PLL domain, independent of main 3.3-V digital rail. Use Value: Guarantees synchronized release of reset only after 1.5-V rail meets timing margin requirements for pixel clock stability. |
| Instrument Cluster Microcontroller Supervision | Telematics Control Unit (TCU) Low-Voltage Detection |
Use Scenario: Validates integrity of 1.5-V supply powering cluster MCU and CAN transceiver interface logic. IC Role / Device Role / Timing Role: Standalone reset generator tied exclusively to 1.5-V rail, decoupled from multi-rail supervisors. Use Value: Enables deterministic boot sequence by asserting reset for ≥140 ms if 1.5-V rail dips below 1.4 V during engine start. |
Use Scenario: Detects brownout on 1.5-V backup supply feeding real-time clock and nonvolatile memory in TCU. IC Role / Device Role / Timing Role: Fault monitor for secondary power domain, triggering controlled shutdown before data loss. Use Value: Provides fail-safe indication with 3 μA quiescent current, extending battery runtime during extended parking mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3803-01QDCKRQ1 | Adjustable threshold via external resistor divider; 1.226 V internal reference; same SC-70 package and open-drain output | Supports monitoring of any rail ≥1.226 V (e.g., 2.5 V, 5 V); requires two external resistors and layout area | Select when flexibility across multiple voltage rails is needed; avoid if 1.5-V-only monitoring suffices and BOM minimization is critical |
| TLV803EB33DBVRQ1 | Fixed 3.3 V threshold; 0.9 μA supply current; same AEC-Q100 Grade 1 rating and SC-70 package | Designed for 3.3-V systems only; incompatible with 1.5-V rail supervision without level-shifting | Choose only for 3.3-V applications; not a functional substitute for TPS3803G15QDCKRQ1's 1.4 V threshold requirement |
Compared with TPS3803-01QDCKRQ1, TPS3803G15QDCKRQ1 reduces component count and layout complexity for 1.5-V systems; compared with TLV803EB33DBVRQ1, it provides correct threshold alignment for low-voltage domains where 3.3-V supervision would cause premature reset assertion.
Availability
TPS3803G15QDCKRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and instrument cluster designs requiring stable component supply with AEC-Q100 compliance and long-term production support.
Supply support for TPS3803G15QDCKRQ1 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 delivering analog and embedded processing solutions, with leadership in automotive, industrial, and power management technologies.
The TPS380x-Q1 family delivers automotive-qualified voltage supervisors optimized for reliable power-on reset and brownout detection in DSP, MCU, and SoC-based systems operating from 1.3 V to 6 V.
FAQ
What is the exact threshold voltage of the TPS3803G15QDCKRQ1 and how is it specified?
The TPS3803G15QDCKRQ1 has a nominal threshold voltage of 1.4 V, with guaranteed accuracy of ±1.5% over temperature (–40°C to 125°C) and supply range. This value is factory-trimmed and specified in the Electrical Characteristics table of the datasheet (SGLS228C, Section 7.5). The actual threshold for a given unit falls between 1.379 V and 1.421 V at 25°C, and hysteresis adds 15 mV to ensure clean deassertion.
Does the TPS3803G15QDCKRQ1 support dual-rail monitoring like the TPS3805H33-Q1?
No, the TPS3803G15QDCKRQ1 monitors only the VDD pin and does not support a second adjustable SENSE input. Unlike the dual-monitoring TPS3805H33-Q1, this device is designed exclusively for single-rail 1.5-V supervision. Pin 5 is marked NC (no connection) in the TPS3803G15-Q1 variant, confirming absence of SENSE functionality.
What is the recommended pull-up resistor value for the open-drain RESET output of the TPS3803G15QDCKRQ1?
Texas Instruments recommends a 10-kΩ pull-up resistor from RESET to VDD for typical applications. This value balances rise time (with CL ≤ 50 pF), power consumption (<0.33 mW at 3.3 V), and noise immunity. Lower values (e.g., 4.7 kΩ) may be used for faster edges in noisy environments, provided the TPS3803G15QDCKRQ1's 5-mA sink capability is not exceeded during assertion.
Is the TPS3803G15QDCKRQ1 compatible with 1.8-V or 2.5-V supply rails?
No - the TPS3803G15QDCKRQ1 is optimized for 1.5-V systems and will assert RESET whenever VDD drops below its fixed 1.4-V threshold. Applying 1.8 V or 2.5 V is within its 1.3–6 V operating range, but detection occurs at 1.4 V, making it unsuitable for higher-rail supervision. For those voltages, TPS3803-01QDCKRQ1 (adjustable) or TLV803xx-Q1 series (fixed 1.8 V/2.5 V options) are appropriate alternatives.
How does the TPS3803G15QDCKRQ1 behave during power-up and what is its minimum valid supply voltage?
The TPS3803G15QDCKRQ1 begins operation when VDD reaches 0.8 V and asserts RESET until VDD exceeds 1.4 V. Its absolute minimum functional supply is 1.3 V per Recommended Operating Conditions. Below 1.3 V, the internal reference and comparator may not stabilize reliably, so system-level power sequencing must ensure VDD rises monotonically through 0.8 V → 1.4 V without stalling in the 0.8–1.3 V range.
TPS3803G15QDCKRQ1 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:
- 1.4V
- 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
TPS3803G15QDCKRQ1 FAQ
1.How can I place an order for TPS3803G15QDCKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3803G15QDCKRQ1 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 TPS3803G15QDCKRQ1 reliable?
The price and inventory of TPS3803G15QDCKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3803G15QDCKRQ1 is usually 5 days.
3.What payment methods are accepted for TPS3803G15QDCKRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3803G15QDCKRQ1 transactions.
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4.How is shipping managed for TPS3803G15QDCKRQ1?
TPS3803G15QDCKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3803G15QDCKRQ1 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 TPS3803G15QDCKRQ1?
For technical support, including TPS3803G15QDCKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3803G15QDCKRQ1 requirements.
6.How does Aetrix verify that TPS3803G15QDCKRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS3803G15QDCKRQ1 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 TPS3803G15QDCKRQ1 meets industry standards.
7.What is the process for return or replacement of TPS3803G15QDCKRQ1?
All TPS3803G15QDCKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3803G15QDCKRQ1, 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 TPS3803G15QDCKRQ1 part is unused and in its original packaging.
Return procedure for TPS3803G15QDCKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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