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Texas Instruments TPS3808G50QDBVRQ1
- Part No.:
- TPS3808G50QDBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
TPS3808G50QDBVRQ1.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:751
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Product details
Overview
TPS3808G50QDBVRQ1 from Texas Instruments is an AEC-Q100 qualified automotive-grade programmable-delay supervisory circuit that monitors 5-V system rails, asserts an open-drain RESET signal upon undervoltage detection (VIT = 4.65 V), supports manual reset via MR pin, and delivers 2.4 μA typical quiescent current for battery-sensitive applications such as automotive radar and ADAS domain controllers.
For engineers reviewing the TPS3808G50QDBVRQ1 datasheet, TPS3808G50QDBVRQ1 pinout, TPS3808G50QDBVRQ1 application, or TPS3808G50QDBVRQ1 equivalent, key selection criteria include its ±0.5% threshold accuracy at 4.65 V, user-adjustable reset delay from 1.25 ms to 10 s via CT pin capacitor, –40°C to +125°C operating range, SOT-23-6 package, and immunity to short SENSE pin transients.
Technical Context
The TPS3808G50QDBVRQ1 implements a precision voltage comparator with built-in hysteresis (1–2.5% of VIT) and a 220-nA on-chip current source for CT-pin-based timing. It uses a factory-trimmed reference to achieve 0.5% typical threshold accuracy for VIT ≤ 3.3 V and ±1% for 3.3 V < VIT ≤ 5 V - confirmed for TPS3808G50QDBVRQ1's 4.65-V threshold.
Its functional architecture includes independent SENSE and MR inputs driving a shared open-drain RESET output with configurable assertion duration. The device remains fully operational across 1.8–6.5 V supply range and exhibits <25 nA SENSE input leakage, enabling direct monitoring of low-current rails without loading error.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold (VIT) | 4.65 V - factory-set fixed threshold for 5-V rail monitoring; ±1% accuracy over –40°C to +125°C ensures reliable brownout detection in automotive environments. |
| Quiescent Current (IDD) | 2.4 μA typical - enables multi-year operation in always-on vehicle subsystems without compromising battery life. |
| Reset Delay Range | 1.25 ms to 10 s - configured via external capacitor on CT pin; supports precise power sequencing in complex SoC/FPGA systems. |
| Operating Temperature | –40°C to +125°C - fully specified junction temperature range meets AEC-Q100 Grade 1 requirements for under-hood automotive use. |
| Output Type | Open-drain RESET - allows level-shifting and wired-OR configuration with other reset sources; requires external pullup (10 kΩ–1 MΩ). |
| SENSE Input Leakage | ≤1.7 μA at VSENSE = 6.5 V - minimal loading on monitored rail; supports high-impedance sensing without voltage droop. |
| MR Pullup Resistance | 90 kΩ internal - permits direct connection to logic outputs without external components; eliminates need for discrete pullup when MR unused. |
Pinout & Package
SOT-23-6 package (2.90 mm × 1.60 mm body size) with exposed pad not present; RoHS-compliant, lead-free finish; thermal resistance RθJA = 180.9°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: RESET | Open-drain output | Asserts low during undervoltage or manual reset; requires external pullup; sinks ≥1 mA at VDD ≥1.8 V. |
| 2: GND | Ground reference | Primary return path for internal circuitry and RESET load current; must connect to low-impedance system ground plane. |
| 3: MR | Manual reset input | Logic-low active (≤0.3×VDD) resets system; internally pulled up to VDD at 90 kΩ; tolerant of partial-voltage logic drivers. |
| 4: CT | Reset delay programming | Connect to GND via capacitor (≥100 pF) for 1.25 ms–10 s delay; open for 20 ms fixed delay; tie to VDD via 40–200 kΩ for 300 ms fixed delay. |
| 5: SENSE | Voltage monitoring input | Direct connection point for 5-V rail; comparator triggers RESET when voltage falls below 4.65 V; ≤25 nA input bias minimizes loading. |
| 6: VDD | Supply input | Accepts 1.8–6.5 V; powers internal reference and logic; requires 0.1-μF ceramic decoupling capacitor placed adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive use from –40°C to +125°C TJ; includes HBM ±2000 V and CDM ±500 V ESD robustness. |
| Programmable reset delay | Three configuration modes: capacitor-timed (1.25 ms–10 s), resistor-timed (300 ms), or open-circuit (20 ms) - no external timer IC needed. |
| High threshold accuracy | ±1% over full temperature range for 4.65-V threshold - reduces design margin requirements and eliminates calibration in production. |
| Low-power supervision | 2.4 μA typical IDD enables integration into always-on domains (e.g., vehicle wake-up circuits) without measurable battery drain. |
| Transient-immune SENSE input | Rejects short negative spikes ≤20 μs duration below VIT - prevents false resets from switching noise or load dump transients. |
Applications
| Automotive Radar Module | FPGA Power Sequencing |
|---|---|
Use Scenario: Monitors 5-V analog supply in 77-GHz radar transceiver; asserts RESET if voltage dips during cold cranking or alternator ripple. IC Role / Device Role / Timing Role: Primary undervoltage supervisor ensuring clean FPGA and RF IC initialization before RF transmission begins. Use Value: Prevents corrupted radar data acquisition by guaranteeing stable 5-V rail prior to digital core boot - critical for ASIL-B compliance. |
Use Scenario: Controls power-up sequence of multi-rail FPGA (1.0 V core, 1.8 V I/O, 5 V auxiliary) where 5-V rail must stabilize first. IC Role / Device Role / Timing Role: Generates delayed active-low RESET after 5-V rail reaches 4.65 V, enabling precise inter-rail timing alignment. Use Value: Eliminates need for discrete RC timers or CPLD-based sequencers - reduces BOM count and layout area in space-constrained ADAS ECUs. |
| ADAS Domain Controller | Automotive Vision System |
Use Scenario: Supervises 5-V supply feeding CAN FD transceivers and Ethernet PHYs in centralized vehicle controller. IC Role / Device Role / Timing Role: Provides fail-safe reset signaling to microcontroller upon 5-V rail collapse; MR pin tied to watchdog timeout signal. Use Value: Enables deterministic recovery from bus-off conditions without requiring software intervention - improves system availability metrics. |
Use Scenario: Ensures clean boot of image sensor interface (MIPI CSI-2) powered by 5-V rail in surround-view camera ECU. IC Role / Device Role / Timing Role: Delays processor release until 5-V rail settles within ±2% of nominal, preventing pixel corruption during sensor initialization. Use Value: Reduces field returns caused by intermittent image artifacts during cold-start - verified in >10M unit deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G33QDBVRQ1 | Fixed 3.07-V threshold; identical package, pinout, and delay programming; same 2.4-μA IDD and –40°C to +125°C rating. | Designed for 3.3-V rail monitoring instead of 5-V; unsuitable for direct replacement without redesigning SENSE connection. | Select only when supervising 3.3-V supplies; retains all timing, MR, and thermal characteristics of TPS3808G50QDBVRQ1. |
| MAX6375US29D3+T | Fixed 2.93-V threshold; 3.5-μA IDD; SOT-23-6; ±1.5% VIT accuracy; no CT-programmable delay (fixed 200 ms). | Lacks adjustable delay and automotive qualification; rated only to +85°C ambient; higher quiescent current impacts battery runtime. | Consider for industrial non-automotive 3-V systems where AEC-Q100 and ultra-low IDD are not required. |
Compared with TPS3808G33QDBVRQ1, the TPS3808G50QDBVRQ1 provides higher threshold accuracy for 5-V rails and matches pin compatibility but differs in VIT; compared with MAX6375US29D3+T, it offers automotive qualification, lower IDD, wider temperature range, and flexible delay tuning - making it superior for safety-critical vehicle electronics.
Availability
TPS3808G50QDBVRQ1 is available at Aetrix Electronics and suitable for automotive radar modules, ADAS domain controllers, and vision systems requiring stable component supply with AEC-Q100 compliance and long-term lifecycle support.
Supply support for TPS3808G50QDBVRQ1 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 ICs.
The TPS3808Gxx-Q1 product line delivers low-quiescent-current, AEC-Q100-qualified supervisory circuits designed specifically for voltage monitoring and reset generation in automotive electronics including radar, vision, and domain control units.
FAQ
What is the exact reset threshold voltage for TPS3808G50QDBVRQ1?
The TPS3808G50QDBVRQ1 has a factory-set nominal reset threshold (VIT) of 4.65 V, with ±1% accuracy over the full –40°C to +125°C junction temperature range. This value is specified in the Electrical Characteristics table of the SBVS085J datasheet and applies exclusively to the TPS3808G50QDBVRQ1 variant - not to other members of the TPS3808Gxx-Q1 family.
Can TPS3808G50QDBVRQ1 be used to monitor voltages other than 5 V?
No - the TPS3808G50QDBVRQ1 is a fixed-threshold device calibrated specifically for 5-V rail supervision (VIT = 4.65 V). To monitor other rails, select the appropriate variant: TPS3808G33QDBVRQ1 for 3.3 V (3.07 V threshold) or TPS3808G12QDBVRQ1 for 1.2 V (1.12 V threshold). The TPS3808G01QDBVRQ1 supports adjustable thresholds down to 0.405 V using external resistors.
How is the reset delay time configured on TPS3808G50QDBVRQ1?
The reset delay on TPS3808G50QDBVRQ1 is set via the CT pin: leave CT open for 20 ms fixed delay, connect CT to VDD through a 40–200 kΩ resistor for 300 ms fixed delay, or connect CT to GND via a capacitor ≥100 pF for user-programmable delay from 1.25 ms to 10 s. Equation 1 in the datasheet (Delay = CT + 0.5×10⁻³) calculates exact values.
Does TPS3808G50QDBVRQ1 require an external pullup resistor on the RESET pin?
Yes - the TPS3808G50QDBVRQ1 features an open-drain RESET output and requires an external pullup resistor between RESET and VDD (or another logic-high rail). TI specifies a range of 10 kΩ to 1 MΩ; 50 kΩ is commonly used. Without this resistor, RESET cannot attain a valid high state, causing system boot failure.
Is TPS3808G50QDBVRQ1 pin-compatible with other TPS3808Gxx-Q1 variants?
Yes - all TPS3808Gxx-Q1 devices in the SOT-23-6 package (including TPS3808G50QDBVRQ1, TPS3808G33QDBVRQ1, and TPS3808G12QDBVRQ1) share identical pinout, package dimensions, and electrical interface. This allows drop-in replacement across voltage thresholds when board layout accommodates the specific VIT requirement.
TPS3808G50QDBVRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.65V
- 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:
- SOT-23-6
TPS3808G50QDBVRQ1 FAQ
1.How can I place an order for TPS3808G50QDBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3808G50QDBVRQ1 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 TPS3808G50QDBVRQ1 reliable?
The price and inventory of TPS3808G50QDBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3808G50QDBVRQ1 is usually 5 days.
3.What payment methods are accepted for TPS3808G50QDBVRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3808G50QDBVRQ1 transactions.
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4.How is shipping managed for TPS3808G50QDBVRQ1?
TPS3808G50QDBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3808G50QDBVRQ1 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 TPS3808G50QDBVRQ1?
For technical support, including TPS3808G50QDBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3808G50QDBVRQ1 requirements.
6.How does Aetrix verify that TPS3808G50QDBVRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS3808G50QDBVRQ1 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 TPS3808G50QDBVRQ1 meets industry standards.
7.What is the process for return or replacement of TPS3808G50QDBVRQ1?
All TPS3808G50QDBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3808G50QDBVRQ1, 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 TPS3808G50QDBVRQ1 part is unused and in its original packaging.
Return procedure for TPS3808G50QDBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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