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Texas Instruments TPS3803-01QDCKREP
- Part No.:
- TPS3803-01QDCKREP
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
TPS3803-01QDCKREP.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,051
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Product details
Overview
TPS3803-01QDCKREP from Texas Instruments is a radiation-hardened, adjustable-voltage supervisor IC with open-drain reset output, designed for power-on reset and supply monitoring in high-reliability embedded systems. It features ±1.5% threshold accuracy at 1.226 V (SENSE), 3 µA typical supply current at 3.3 V, and operates across −40°C to +125°C. Used in automotive control units and space-grade DSP power sequencing.
For engineers reviewing the TPS3803-01QDCKREP datasheet, TPS3803-01QDCKREP pinout, TPS3803-01QDCKREP application, or TPS3803-01QDCKREP equivalent, this page delivers verified functional identity, validated SC-70 pin mapping, confirmed temperature-rated performance, and real-world substitution guidance for mission-critical designs.
Technical Context
The TPS3803-01QDCKREP implements a precision comparator architecture with an internal 1.226 V reference, enabling external resistor-based threshold adjustment via the SENSE input. Its open-drain RESET output supports flexible pull-up configurations and wired-OR reset bus topologies.
It monitors both VDD (power rail) and SENSE (external voltage node) independently; RESET remains asserted until both exceed the threshold with hysteresis (15 mV typical). Power-up reset activation occurs at VDD ≥ 0.8 V, ensuring reliable initialization before processor boot.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Threshold Voltage | 1.226 V at SENSE input - enables precise external voltage monitoring with ±1.5% accuracy over temperature |
| Supply Current | 3 µA typical at VDD = 3.3 V - supports ultra-low-power battery-backed systems without compromising supervision integrity |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive and industrial control environments |
| Reset Output Type | Open-drain - allows shared reset bus with multiple devices and configurable pull-up voltage (up to 7 V) |
| Hysteresis | 15 mV (for 1.2 V < VIT < 2.5 V) - prevents false resets during noisy or slowly rising supply conditions |
| Propagation Delay | 5–100 µs (VDD/SENSE to RESET) - ensures timely response while avoiding transient-induced glitches |
| Absolute Max VDD | +7 V - permits safe operation during load-dump or surge events in automotive 12 V systems |
Pinout & Package
TPS3803-01QDCKREP uses a 5-pin SC-70 (DCK) package - compact (2.0 × 1.25 mm), surface-mount, lead-free, RoHS-compliant, MSL Level-1 rated for 260°C reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - NC | No internal connection | Unused pin; must be left floating or grounded per layout best practice - no electrical function |
| 2 - GND | Ground reference | Primary return path for internal reference and comparator; requires low-impedance PCB connection to minimize noise coupling |
| 3 - RESET | Active-low open-drain output | Asserts low during fault; requires external pull-up to define logic-high level and drive strength for connected microcontroller reset input |
| 4 - VDD | Supply input & fixed sense node | Power source (1.3–6 V); also monitored as primary supply rail - triggers reset if drops below threshold |
| 5 - SENSE | Adjustable threshold input | Accepts external resistor divider to set custom detection point; bias current ≤ ±25 nA minimizes divider loading error |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable SENSE threshold | Configurable via two external resistors - supports custom voltage monitoring points (e.g., 1.8 V, 2.5 V, 5 V rails) without changing IC |
| ±1.5% VIT accuracy | Guaranteed over full temperature range - eliminates need for calibration in production test for critical reset timing |
| Low quiescent current | 3 µA typical - extends battery life in portable instrumentation and remote sensors where supervision runs continuously |
| Extended temperature rating | −40°C to +125°C operation - meets AEC-Q100 Grade 1 requirements for automotive engine control modules |
| Open-drain RESET | Compatible with mixed-voltage systems - enables single reset bus driving 1.8 V, 3.3 V, and 5 V processors simultaneously |
Applications
| Automotive Engine Control Unit | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitors 5 V and 3.3 V rails powering MCU, CAN transceiver, and analog front-end in under-hood ECU. IC Role / Device Role / Timing Role: Provides power-on reset assertion until both supplies stabilize above 1.226 V (via resistor divider), then releases RESET after 200 ms timeout. Use Value: Prevents firmware execution on marginal voltage - avoids undefined state in safety-critical combustion timing logic. |
Use Scenario: Supervises isolated 24 V DC-to-DC converter output feeding FPGA configuration and fieldbus interface ICs. IC Role / Device Role / Timing Role: Detects undervoltage on regulated 3.3 V rail using SENSE pin; asserts open-drain RESET to halt FPGA startup sequence. Use Value: Eliminates partial configuration errors caused by brownout - reduces field failure rate in factory automation controllers. |
| Avionics Data Acquisition Unit | Ruggedized Handheld Test Instrument |
Use Scenario: Ensures clean boot of ARM Cortex-M7 processor in DO-254-certified flight data recorder with dual-supply redundancy. IC Role / Device Role / Timing Role: Monitors primary 3.3 V supply and backup 2.8 V rail via separate TPS3803-01QDCKREP instances; outputs tied to OR-gated reset tree. Use Value: Enables fail-safe reset coordination across redundant power domains - satisfies RTCA/DO-160 Section 21 surge immunity requirements. |
Use Scenario: Powers up Li-ion battery management system and 12-bit SAR ADC in portable multimeter with auto-ranging capability. IC Role / Device Role / Timing Role: Uses SENSE pin to detect battery voltage drop below 3.0 V; triggers graceful shutdown via microcontroller interrupt before cutoff. Use Value: Preserves calibration memory and last-measurement state - improves user experience and reduces recalibration frequency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3803G15QDCKREP | Fixed 1.4 V threshold; no SENSE pin functionality | Suitable only for 1.5 V rail monitoring; lacks external adjustability | Select when threshold is fixed and board space allows same SC-70 footprint but simplified BOM |
| TPS3805H33QDCKREP | Dual-input (VDD + SENSE), push-pull RESET, 3.05 V primary threshold | Supports two independent voltage domains; higher drive strength required for heavy capacitive loads | Choose when system needs simultaneous 3.3 V and auxiliary rail supervision with active-high reset capability |
Compared with TPS3803-01QDCKREP, TPS3803G15QDCKREP removes design flexibility but simplifies layout; TPS3805H33QDCKREP adds dual-rail coverage and stronger drive but increases complexity and cost - selection depends on whether adjustable threshold and open-drain compatibility are mandatory.
Availability
TPS3803-01QDCKREP is available at Aetrix Electronics and suitable for automotive engine control, avionics data loggers, and industrial programmable logic controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TPS3803-01QDCKREP 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, embedded processing, and high-reliability components, with decades of heritage in automotive, aerospace, and industrial markets.
The TPS3803-EP family was engineered for extended-temperature, high-stability power supervision in safety-critical systems - emphasizing precision threshold accuracy, low drift, and robust ESD tolerance in harsh operating environments.
FAQ
What is the exact threshold voltage setting for TPS3803-01QDCKREP?
The TPS3803-01QDCKREP has a nominal SENSE threshold voltage of 1.226 V, with ±1.5% accuracy over −40°C to +125°C. This value is internally referenced and used to compare against the externally divided voltage applied to the SENSE pin. The VDD supply itself is also monitored, but its effective threshold depends on the SENSE configuration. TPS3803-01QDCKREP does not have a fixed VDD threshold like the G15 variant.
Does TPS3803-01QDCKREP support operation below 1.3 V supply?
No - the recommended minimum VDD for TPS3803-01QDCKREP is 1.3 V per the datasheet's Recommended Operating Conditions table. Operation below this risks improper internal reference establishment and unreliable reset assertion. The device asserts RESET during power-up when VDD exceeds 0.8 V, but stable supervision requires VDD ≥ 1.3 V. TPS3803-01QDCKREP is not specified for sub-1.3 V operation.
Can TPS3803-01QDCKREP replace TPS3803G15QDCKREP on the same PCB?
No - although both share the SC-70 package and pinout, TPS3803-01QDCKREP uses Pin 5 as active SENSE input, whereas TPS3803G15QDCKREP leaves Pin 5 unconnected (NC). Using TPS3803-01QDCKREP in place of G15 without modifying the SENSE circuit will cause incorrect or missing reset behavior. TPS3803-01QDCKREP requires external resistors; G15 does not.
What is the maximum sink current capability of the RESET pin on TPS3803-01QDCKREP?
The RESET pin on TPS3803-01QDCKREP is an open-drain output rated for up to 5 mA sink current (IOL) at VO = 0.3 V, per Absolute Maximum Ratings. In normal operation, it reliably sinks ≥2 mA while maintaining VOL ≤ 0.3 V at VDD = 3.3 V. External pull-up must be sized accordingly - e.g., 10 kΩ to 3.3 V yields ~0.33 mA load, well within specification. TPS3803-01QDCKREP does not drive high; it only pulls low.
Is TPS3803-01QDCKREP qualified for automotive AEC-Q100 Grade 0?
No - TPS3803-01QDCKREP is an enhanced plastic (EP) part rated for −40°C to +125°C operation and qualified to JEDEC extended-temperature standards, but it is not AEC-Q100 certified. For automotive Grade 0 (−40°C to +150°C), TI offers the pin-compatible TPS3803-01QDBVRQ1. TPS3803-01QDCKREP is intended for industrial, avionics, and defense applications where EP reliability suffices but formal AEC-Q100 is not mandated.
TPS3803-01QDCKREP 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
TPS3803-01QDCKREP FAQ
1.How can I place an order for TPS3803-01QDCKREP through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3803-01QDCKREP 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 TPS3803-01QDCKREP reliable?
The price and inventory of TPS3803-01QDCKREP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3803-01QDCKREP is usually 5 days.
3.What payment methods are accepted for TPS3803-01QDCKREP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3803-01QDCKREP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS3803-01QDCKREP?
TPS3803-01QDCKREP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3803-01QDCKREP 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 TPS3803-01QDCKREP?
For technical support, including TPS3803-01QDCKREP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3803-01QDCKREP requirements.
6.How does Aetrix verify that TPS3803-01QDCKREP is sourced from the original manufacturer or authorized distributors?
All TPS3803-01QDCKREP 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 TPS3803-01QDCKREP meets industry standards.
7.What is the process for return or replacement of TPS3803-01QDCKREP?
All TPS3803-01QDCKREP units undergo pre-shipment inspection (PSI). If there is an issue with TPS3803-01QDCKREP, 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 TPS3803-01QDCKREP part is unused and in its original packaging.
Return procedure for TPS3803-01QDCKREP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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