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Texas Instruments TPS3837L30QDBVRQ1
- Part No.:
- TPS3837L30QDBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS3837L30QDBVRQ1.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,449
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Product details
Overview
TPS3837L30QDBVRQ1 from Texas Instruments is an automotive-grade nanosupervisory circuit with active-high push-pull RESET output, 2.64 V fixed threshold voltage, 220 nA typical supply current, −40°C to 125°C operating range, and selectable 10 ms / 200 ms power-on reset delay. It monitors supply rails in low-power automotive microcontrollers and battery-powered telematics modules.
For engineers reviewing the TPS3837L30QDBVRQ1 datasheet, TPS3837L30QDBVRQ1 pinout, TPS3837L30QDBVRQ1 application, or TPS3837L30QDBVRQ1 equivalent, key selection criteria include its Q1 automotive qualification, precise 2.64 V supervision level, CT-pin configurable delay, manual reset capability, and SOT-23-5 package compatibility with space-constrained PCB layouts.
Technical Context
The TPS3837L30QDBVRQ1 implements a bandgap-referenced voltage comparator with internal hysteresis (40 mV) to reject noise-induced false resets. Its reset logic integrates a refresh timer that initiates after VDD exceeds the 2.64 V threshold, with delay timing controlled by the CT pin-grounded for 10 ms or tied to VDD for 200 ms.
Unlike open-drain or active-low variants, this device asserts RESET high upon valid supply conditions and holds it low during undervoltage events. Manual reset (MR) overrides automatic supervision with sub-1 µs response, and the internal MR pullup (30 kΩ) enables direct connection to GND without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 2.64 V (precisely trimmed; supports 2.7 V nominal rail monitoring with ±50 mV hysteresis) |
| Supply Current | 220 nA typical (enables multi-year operation in coin-cell–powered automotive sensors) |
| Reset Delay Options | 10 ms (CT = GND) or 200 ms (CT = VDD); no external capacitor required |
| Output Type | Active-high push-pull RESET (drives high to VDD; sinks up to 2 mA, sources up to −2 mA) |
| Operating Temperature | −40°C to 125°C (AEC-Q100 qualified for engine bay and ADAS ECU deployment) |
| ESD Protection | >2000 V HBM, >200 V MM (robust handling in automotive manufacturing environments) |
| Package | SOT-23-5 (2.9 mm × 1.6 mm footprint; compatible with standard pick-and-place and reflow processes) |
Pinout & Package
TPS3837L30QDBVRQ1 is housed in a 5-pin SOT-23 (DBV) package with gull-wing leads, RoHS-compliant green finish, and moisture sensitivity level 1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CT | Delay Configuration Input | Selects reset timeout: GND = 10 ms, VDD = 200 ms; high-impedance input draws <25 nA |
| 2 - GND | Ground Reference | Return path for all internal circuits; must be low-inductance connection to system ground plane |
| 3 - MR | Manual Reset Input | Active-low asynchronous reset trigger; internally pulled up to VDD (30 kΩ); accepts 0 V to VDD logic levels |
| 4 - VDD | Supply Input | Power rail input (1.6 V to 6 V); requires local 0.1 µF ceramic bypass capacitor per datasheet Note 3 |
| 5 - RESET | Supervisory Output | Active-high push-pull signal; drives processor / FPGA / ASIC reset line directly without external pullup |
Key Features
| Feature | Design Value |
|---|---|
| Nanopower Operation | 220 nA supply current enables integration into always-on automotive subsystems without compromising battery life |
| Automotive Qualification | AEC-Q100 Grade 1 certified with full temperature range support (−40°C to 125°C) and enhanced reliability screening |
| Configurable Reset Timing | No external components needed for delay selection-reduces BOM count and layout area versus RC-based solutions |
| Robust Input Protection | MR and CT pins tolerate −0.3 V to 7 V; internal clamp diodes prevent latch-up during transients |
| Precision Threshold | 2.64 V ±30 mV over temperature ensures reliable reset assertion before MCU brownout, even at 125°C |
Applications
| Engine Control Unit (ECU) Power Monitoring | Telematics Control Unit (TCU) Supervision |
|---|---|
Use Scenario: Monitors 2.7 V auxiliary rail powering CAN transceivers and sensor interfaces in gasoline/diesel ECUs. IC Role / Device Role / Timing Role: Provides power-on reset and brownout detection with 10 ms delay to coordinate microcontroller boot sequence with peripheral initialization. Use Value: Prevents firmware corruption during cold cranking when battery dips below 9 V, leveraging 2.64 V threshold and 40 mV hysteresis. | Use Scenario: Supervises 3.0 V supply for LTE modem and GNSS receiver in vehicle infotainment TCUs. IC Role / Device Role / Timing Role: Generates 200 ms reset pulse (CT = VDD) to ensure stable modem boot after ignition-on power ramp. Use Value: Eliminates need for discrete RC network, reducing component count while meeting ISO 16750-2 transient immunity requirements. |
| ADAS Camera Module Reset | Electric Power Steering (EPS) Sensor Interface |
Use Scenario: Ensures clean reset of image signal processor (ISP) and MIPI CSI-2 serializer in rear-view camera modules. IC Role / Device Role / Timing Role: Active-high RESET output directly drives ISP reset pin; manual reset used for field firmware recovery. Use Value: Push-pull drive eliminates external pullup resistor, saving board space and improving noise immunity in high-EMI camera harness environments. | Use Scenario: Supervises 2.8 V analog sensor supply in EPS torque and position sensing circuits. IC Role / Device Role / Timing Role: Detects undervoltage on isolated sensor rail and asserts RESET to main EPS MCU via optocoupler interface. Use Value: 220 nA quiescent current avoids loading sensitive analog rails; 125°C rating supports under-hood placement near steering column. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3836L30QDBVRQ1 | Active-low push-pull RESET output; identical threshold (2.64 V), delay options, and package | Requires inverted reset logic on host MCU; unsuitable where active-high reset is mandated by SoC architecture | Select when target processor accepts active-low reset and board layout already uses pull-down strategy |
| TPS3838L30QDBVRQ1 | Active-low open-drain RESET output; same threshold and timing; requires external pullup resistor | Enables wired-OR reset bus sharing across multiple supervisors; adds BOM cost and layout area | Choose for multi-rail systems requiring shared reset arbitration or level translation to higher voltage domains |
Compared with TPS3836L30QDBVRQ1 and TPS3838L30QDBVRQ1, the TPS3837L30QDBVRQ1 provides direct active-high drive without external components-reducing design complexity and improving noise margin in single-supply automotive MCUs.
Availability
TPS3837L30QDBVRQ1 is available at Aetrix Electronics and suitable for automotive control units, telematics gateways, and ADAS camera modules requiring stable component supply with AEC-Q100 compliance and long-term production continuity.
Supply support for TPS3837L30QDBVRQ1 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, embedded processing, and connectivity technologies for automotive, industrial, and consumer applications.
The TPS3837-Q1 family is designed specifically for automotive power-supply supervision-delivering nanopower consumption, precise voltage thresholds, and robust operation across extended temperature ranges to meet stringent vehicle ECU requirements.
FAQ
What is the exact reset threshold voltage of the TPS3837L30QDBVRQ1?
The TPS3837L30QDBVRQ1 has a precisely trimmed negative-going input threshold voltage of 2.64 V, with a guaranteed range of 2.54 V to 2.71 V over −40°C to 125°C. This value is factory-set and does not require external calibration; it is optimized for monitoring 2.7 V nominal rails in automotive systems where early brownout detection is critical before MCU functional failure.
How does the CT pin configure the reset delay time in the TPS3837L30QDBVRQ1?
The CT pin on the TPS3837L30QDBVRQ1 selects between two factory-programmed delay options: connecting CT to GND configures a typical 10 ms power-on reset delay, while connecting CT to VDD selects a typical 200 ms delay. No external capacitor is needed-the timing is generated by an internal RC network, ensuring consistent performance across temperature and voltage variations without layout sensitivity.
Is the TPS3837L30QDBVRQ1 compatible with 1.8 V supply rails?
Yes, the TPS3837L30QDBVRQ1 operates over a supply voltage range of 1.6 V to 6 V, making it fully compatible with 1.8 V systems. However, its 2.64 V reset threshold means it is intended to supervise higher-voltage rails (e.g., 2.7 V or 3.0 V) rather than the 1.8 V core domain itself. For 1.8 V rail supervision, TPS3837E18QDBVRQ1 (1.71 V threshold) would be the appropriate variant.
Does the TPS3837L30QDBVRQ1 require an external pullup resistor on the RESET pin?
No, the TPS3837L30QDBVRQ1 features an active-high push-pull RESET output capable of sourcing up to −2 mA and sinking up to 2 mA. This eliminates the need for an external pullup resistor, simplifying the schematic, reducing component count, and improving noise immunity-especially important in electrically noisy automotive environments where open-drain outputs may suffer from slow rise times or EMI coupling.
What automotive qualification level does the TPS3837L30QDBVRQ1 meet?
The TPS3837L30QDBVRQ1 is AEC-Q100 qualified to Grade 1 (−40°C to +125°C ambient), with full reliability testing including HTOL, TC, UHAST, and ESD per JESD22 standards. Its DBV package carries MSL Level-1 rating, and the device is marked "Q1" to denote automotive qualification-ensuring suitability for powertrain, chassis, and body electronics applications requiring long-term reliability under harsh thermal and vibration conditions.
TPS3837L30QDBVRQ1 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:
- 2.64V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 10ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TPS3837L30QDBVRQ1 FAQ
1.How can I place an order for TPS3837L30QDBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3837L30QDBVRQ1 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 TPS3837L30QDBVRQ1 reliable?
The price and inventory of TPS3837L30QDBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3837L30QDBVRQ1 is usually 5 days.
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Once your TPS3837L30QDBVRQ1 order is processed, you will receive an email with the shipment details and tracking number.
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5.How can I obtain technical support or documentation for TPS3837L30QDBVRQ1?
For technical support, including TPS3837L30QDBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3837L30QDBVRQ1 requirements.
6.How does Aetrix verify that TPS3837L30QDBVRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS3837L30QDBVRQ1 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 TPS3837L30QDBVRQ1 meets industry standards.
7.What is the process for return or replacement of TPS3837L30QDBVRQ1?
All TPS3837L30QDBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3837L30QDBVRQ1, 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 TPS3837L30QDBVRQ1 part is unused and in its original packaging.
Return procedure for TPS3837L30QDBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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