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Texas Instruments TPS3828-50QDBVRG4Q
- Part No.:
- TPS3828-50QDBVRG4Q
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS3828-50QDBVRG4Q.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,473
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Product details
Overview
TPS3828-50QDBVRG4Q from Texas Instruments is an AEC-Q100 Grade 1 automotive voltage supervisor IC with open-drain active-low reset output, 4.55 V threshold (±1.2% over −40°C to 125°C), 200 ms power-on reset delay, and integrated watchdog timer. It monitors 5 V supply rails in microcontroller-based automotive control units and asserts reset if VDD drops below threshold or WDI fails to toggle within 1.6 s.
For engineers reviewing the TPS3828-50QDBVRG4Q datasheet, TPS3828-50QDBVRG4Q pinout, TPS3828-50QDBVRG4Q application, or TPS3828-50QDBVRG4Q equivalent, this page delivers verified functional identity, validated SOT-23-5 pin mapping, confirmed 4.55 V supervision accuracy, watchdog timeout behavior, and two technically documented alternative parts for automotive-grade reset supervision.
Technical Context
The TPS3828-50QDBVRG4Q implements a fixed-threshold voltage supervisor with internal 52 kΩ/40 kΩ resistor divider setting VIT− = 4.55 V nominal, hysteresis of 50 mV, and power-up reset assertion at VDD > 1.1 V. Its watchdog timer requires a falling edge on WDI every 1.6 s (typical) to prevent reset assertion.
It features open-drain RESET output capable of sinking ≥3 mA at VOL ≤ 0.4 V, manual reset input (MR) with 90 kΩ internal pullup, and operates across −40°C to 125°C with 15 µA typical supply current. No external components are required for basic supervision.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.1 V to 5.5 V - supports operation during brown-out and startup of 5 V systems |
| Threshold Voltage (VIT−) | 4.44 V to 4.64 V (−40°C to 125°C) - ensures reliable 5 V rail monitoring with ±1.2% tolerance |
| Reset Delay Time (td) | 120 ms to 300 ms - guarantees sufficient system stabilization before release from reset |
| Watchdog Timeout (ttout) | 0.9 s to 2.5 s - detects firmware hangs in safety-critical automotive ECUs |
| Supply Current (IDD) | 15 µA typical - enables low-power always-on supervision in battery-backed modules |
| Output Type | Open-drain RESET - allows wired-OR configuration and level translation with external pullup |
| ESD Rating (HBM) | ±2000 V - meets automotive manufacturing ESD robustness requirements per MIL-STD-883 |
Pinout & Package
TPS3828-50QDBVRG4Q is housed in a 5-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm, optimized for space-constrained automotive PCBs and qualified per AEC-Q100 Grade 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: RESET | Open-drain active-low reset output | Sinks ≥3 mA; requires external pullup for logic-high state; asserts low on VDD drop or WDI timeout |
| 2: GND | Ground reference | Primary return path for internal circuitry and output sink current; must be low-impedance |
| 3: MR | Manual reset input | Active-low; pulls RESET low when asserted; internally pulled up to VDD via 90 kΩ resistor |
| 4: WDI | Watchdog timer input | Falling-edge triggered; resets watchdog timer; floating state generates internal pulses to prevent false reset |
| 5: VDD | Supply and monitored voltage input | Powers device and serves as supervision rail; asserts reset if < 4.44 V (min) over full temperature range |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to 125°C ambient operation in automotive powertrain and chassis modules |
| Open-drain RESET output | Enables flexible interface with diverse microcontroller reset inputs and supports multi-supervisor wired-OR schemes |
| Integrated 1.6 s watchdog timer | Provides autonomous firmware health monitoring without requiring dedicated MCU timer resources |
| 200 ms fixed reset delay | Ensures stable power delivery and clock settling before releasing downstream logic from reset |
| No external components required | Reduces BOM count and layout area; eliminates calibration drift and component aging effects |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance System (ADAS) Camera Module |
|---|---|
Use Scenario: Monitors 5 V supply to MCU and image signal processor during cold cranking and load dump events. IC Role / Device Role / Timing Role: Voltage supervisor with watchdog; asserts open-drain RESET to hold MCU in reset until VDD stabilizes above 4.44 V and WDI receives valid toggles. Use Value: Prevents erratic MCU execution during unstable battery conditions and detects firmware lockups in real-time vision processing. |
Use Scenario: Ensures clean boot and runtime supervision of SoC powering CMOS image sensor and ISP in rear-view camera. IC Role / Device Role / Timing Role: Supervises 5 V rail and provides 200 ms power-on delay plus 1.6 s watchdog timeout to validate firmware initialization sequence. Use Value: Eliminates need for discrete RC reset circuits while guaranteeing fail-safe behavior under ISO 16750-2 electrical stress conditions. |
| Body Control Module (BCM) | Automotive Infotainment Head Unit |
Use Scenario: Provides reset coordination between main MCU and CAN transceiver during ignition cycling and sleep/wake transitions. IC Role / Device Role / Timing Role: Open-drain RESET output interfaces directly with transceiver's /RESET pin; MR input synchronizes with vehicle wake-up signal. Use Value: Enables deterministic power sequencing and prevents bus arbitration errors during partial power-up states. |
Use Scenario: Supervises 5 V supply to application processor and audio codec in head unit with extended temperature operation. IC Role / Device Role / Timing Role: Monitors VDD with 4.55 V threshold and uses WDI to verify bootloader execution integrity before OS launch. Use Value: Reduces field failure rate due to undetected firmware stalls during boot, meeting ASIL-B diagnostic coverage targets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3823-50QDBVRQ1 | Push-pull RESET output; identical threshold (4.55 V), delay (200 ms), and watchdog (1.6 s) | Requires no external pullup; not suitable for wired-OR or level-shifted reset buses | Select when board-level reset signaling uses single-point push-pull drive and no shared reset bus exists. |
| TPS3828-33QDBVRQ1 | Same open-drain output and 200 ms delay, but 2.93 V threshold (not 4.55 V) | Designed for 3.3 V rail supervision; incompatible for 5 V systems without redesign | Choose only when migrating to lower-voltage domain; verify VDD compatibility and reset timing margins. |
Compared with TPS3823-50QDBVRQ1 and TPS3828-33QDBVRQ1, the TPS3828-50QDBVRG4Q uniquely combines 5 V-specific threshold accuracy, open-drain flexibility, and AEC-Q100 Grade 1 qualification-making it the sole fit for wired-OR 5 V reset architectures in harsh automotive environments.
Availability
TPS3828-50QDBVRG4Q is available at Aetrix Electronics and suitable for automotive engine control units, ADAS camera modules, and body control modules requiring stable component supply with guaranteed long-term automotive lifecycle support.
Supply support for TPS3828-50QDBVRG4Q 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 deep expertise in automotive-grade power management and supervisory ICs.
The TPS382x-Q1 product line was designed specifically for automotive DSP, MCU, and microprocessor initialization and runtime supervision-emphasizing AEC-Q100 compliance, wide temperature operation, and integrated watchdog functionality.
FAQ
What is the exact reset threshold voltage of the TPS3828-50QDBVRG4Q over temperature?
The TPS3828-50QDBVRG4Q has a nominal negative-going input threshold voltage (VIT−) of 4.55 V, with a guaranteed range of 4.44 V to 4.64 V across the full −40°C to 125°C operating temperature range. This 1.2% tolerance ensures precise 5 V rail supervision without external calibration, and hysteresis is fixed at 50 mV to prevent chatter near the threshold. The TPS3828-50QDBVRG4Q maintains this specification under all recommended operating conditions per TI SGLS143E.
Does the TPS3828-50QDBVRG4Q require external components to function as a basic voltage supervisor?
No, the TPS3828-50QDBVRG4Q requires no external components for core supervision functionality. Its fixed 4.55 V threshold is set by an internal resistor divider, the 200 ms reset delay is generated internally, and the watchdog timer operates autonomously. A 0.1 µF ceramic capacitor on VDD is recommended only for noisy supplies. The TPS3828-50QDBVRG4Q integrates all essential supervision logic-including MR pullup (90 kΩ) and WDI pulse generation-eliminating discrete BOM items.
How does the watchdog timer on the TPS3828-50QDBVRG4Q behave when the WDI pin is left unconnected?
When the WDI pin of the TPS3828-50QDBVRG4Q is left floating, the device automatically generates internal pulses to prevent inadvertent watchdog timeout and reset assertion. This feature avoids false resets in systems where WDI is unused. However, if deterministic behavior is required, TI recommends connecting WDI to ground via a 1 kΩ resistor to ensure the pin is recognized as actively low rather than high-impedance. This behavior is intrinsic to the TPS3828-50QDBVRG4Q's watchdog architecture.
What is the maximum sink current capability of the TPS3828-50QDBVRG4Q's open-drain RESET output?
The TPS3828-50QDBVRG4Q's open-drain RESET output is specified to sink at least 3 mA while maintaining VOL ≤ 0.4 V at VDD = VIT− – 0.2 V, across −40°C to 125°C. This ensures reliable interfacing with standard automotive microcontrollers that require ≥2 mA reset sink capability. The output remains functional up to 5.5 V supply, and its design supports wired-OR configurations with multiple supervisors sharing a common reset bus-key for complex automotive ECU designs using the TPS3828-50QDBVRG4Q.
Is the TPS3828-50QDBVRG4Q pin-compatible with other members of the TPS382x-Q1 family?
Yes, the TPS3828-50QDBVRG4Q shares identical 5-pin SOT-23 (DBV) package dimensions and pinout with all TPS382x-xx-Q1 variants-including TPS3823-50QDBVRQ1 and TPS3820-50QDBVRQ1. Pin 1 is RESET, Pin 2 is GND, Pin 3 is MR, Pin 4 is WDI, and Pin 5 is VDD. This mechanical and electrical pin compatibility allows direct substitution in layouts where functional differences (e.g., push-pull vs. open-drain, delay time) are acceptable or can be validated. The TPS3828-50QDBVRG4Q is fully footprint-compatible.
TPS3828-50QDBVRG4Q Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.55V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 120ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TPS3828-50QDBVRG4Q FAQ
1.How can I place an order for TPS3828-50QDBVRG4Q through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3828-50QDBVRG4Q 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 TPS3828-50QDBVRG4Q reliable?
The price and inventory of TPS3828-50QDBVRG4Q are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3828-50QDBVRG4Q is usually 5 days.
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We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3828-50QDBVRG4Q transactions.
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TPS3828-50QDBVRG4Q orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3828-50QDBVRG4Q 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 TPS3828-50QDBVRG4Q?
For technical support, including TPS3828-50QDBVRG4Q datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3828-50QDBVRG4Q requirements.
6.How does Aetrix verify that TPS3828-50QDBVRG4Q is sourced from the original manufacturer or authorized distributors?
All TPS3828-50QDBVRG4Q 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 TPS3828-50QDBVRG4Q meets industry standards.
7.What is the process for return or replacement of TPS3828-50QDBVRG4Q?
All TPS3828-50QDBVRG4Q units undergo pre-shipment inspection (PSI). If there is an issue with TPS3828-50QDBVRG4Q, 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 TPS3828-50QDBVRG4Q part is unused and in its original packaging.
Return procedure for TPS3828-50QDBVRG4Q:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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