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Texas Instruments TPS3837K33QDBVRQ1
- Part No.:
- TPS3837K33QDBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS3837K33QDBVRQ1.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,012
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Product details
Overview
TPS3837K33QDBVRQ1 from Texas Instruments is an automotive-grade nanosupervisory circuit with active-high push-pull RESET output, 2.93 V precision voltage threshold, 220 nA typical supply current, and selectable 10 ms / 200 ms power-on reset delay. It monitors 3.3 V supply rails in battery-powered automotive microcontrollers and low-power DSPs.
For engineers reviewing the TPS3837K33QDBVRQ1 datasheet, TPS3837K33QDBVRQ1 pinout, TPS3837K33QDBVRQ1 application, or TPS3837K33QDBVRQ1 equivalent, this page delivers verified functional identity, validated pin roles, confirmed automotive temperature range (−40°C to 125°C), exact SOT-23 (DBV) package mapping, and two technically documented alternative parts for system-level reset supervision.
Technical Context
The TPS3837K33QDBVRQ1 implements a bandgap-referenced voltage comparator with hysteresis (40 mV) and an internal refresh timer to generate precise power-on reset pulses. Its CT pin selects between 10 ms (CT = GND) and 200 ms (CT = VDD) delay times, independent of supply ramp rate.
It features manual reset (MR) input with −200 µA low-level input current and internal 30 kΩ pullup, operates down to 1.6 V supply, and asserts RESET when VDD falls below 2.93 V or rises above 1.1 V during power-up. Output drive capability is ±2 mA at 3.3 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93 V ±0.11 V - precisely supervises 3.3 V systems with 40 mV hysteresis to prevent chatter near trip point |
| Supply Current | 220 nA typ at VDD > 3 V - enables multi-year operation in coin-cell–powered automotive sensors |
| Reset Delay Options | 10 ms (CT = GND) or 200 ms (CT = VDD) - configurable timing without external components |
| Output Type | Active-high push-pull RESET - drives logic-high reset signal directly to MCU without external pullup |
| Operating Temp | −40°C to 125°C - qualified per AEC-Q100 for under-hood and body-control module deployment |
| ESD Rating | >2000 V HBM, >200 V MM - robust against assembly and field electrostatic discharge |
| Package | SOT-23 (DBV), 5-pin - surface-mount footprint compatible with automated PCB assembly |
Pinout & Package
TPS3837K33QDBVRQ1 uses the 5-pin SOT-23 (DBV) package, 2.9 mm × 1.6 mm × 1.45 mm max height, RoHS-compliant, tape-and-reel (3000 pcs/reel), MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CT | Delay time select | Connect to GND for 10 ms delay; connect to VDD for 200 ms delay - no external capacitor required |
| 2 - GND | Ground reference | Return path for internal bandgap and comparator; must be low-impedance for stable threshold accuracy |
| 3 - MR | Manual reset input | Active-low asynchronous reset; internal 30 kΩ pullup eliminates need for external resistor if unused |
| 4 - VDD | Supply input | Accepts 1.6 V to 6 V; powers internal circuitry and enables RESET assertion below 2.93 V |
| 5 - RESET | Active-high push-pull output | Drives high (≥0.8×VDD) or low (≤0.4 V) with ±2 mA capability - interfaces directly to ARM Cortex-M or MSP430 reset pins |
Key Features
| Feature | Design Value |
|---|---|
| Nanopower consumption | 220 nA typical supply current - extends battery life in always-on telematics modules |
| Automotive qualification | AEC-Q100 Grade 1 (−40°C to 125°C) - certified for engine control, ADAS, and infotainment subsystems |
| Configurable reset timing | Hardware-selectable 10 ms / 200 ms delay via CT pin - eliminates need for external RC network or firmware calibration |
| Precision threshold tolerance | ±3.8% over temperature (2.82 V to 3.10 V) - ensures reliable reset across full automotive thermal range |
| Robust MR interface | −200 µA low-level input current with internal pullup - simplifies PCB layout and reduces BOM count |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
Use Scenario: Monitors 3.3 V domain powering MCU and CAN transceiver during cold cranking and load dump events. IC Role / Device Role / Timing Role: Voltage supervisor providing power-on reset and brownout detection with 200 ms delay to accommodate slow-ramping supplies. Use Value: Prevents MCU lockup by ensuring clean initialization after voltage recovery, meeting ISO 16750-2 pulse 4 requirements. |
Use Scenario: Supervises vision processor supply in camera ECU where false resets cause image loss or safety violation. IC Role / Device Role / Timing Role: Precision 2.93 V threshold detector with 40 mV hysteresis to reject noise-induced trips on noisy 12 V–to–3.3 V DC/DC outputs. Use Value: Eliminates spurious resets during electromagnetic interference (EMI) exposure, supporting ASIL-B functional safety compliance. |
| Telematics Control Unit (TCU) | Body Control Module (BCM) |
Use Scenario: Powers up LTE modem and GNSS receiver in always-connected vehicle tracking units with coin-cell backup. IC Role / Device Role / Timing Role: Nanopower supervisor enabling 10-year battery life while asserting active-high RESET to wake microcontroller from deep sleep. Use Value: Reduces quiescent current by >90% versus standard supervisors, extending field-deployed unit service intervals. |
Use Scenario: Manages reset sequencing for LIN gateway MCU and door module drivers in low-voltage battery conditions. IC Role / Device Role / Timing Role: Manual reset (MR) input synchronized with ignition key cycle; CT pin tied to VDD for 200 ms delay matching MCU boot ROM timing. Use Value: Guarantees deterministic reset release timing across all BCM variants, eliminating firmware workarounds for inconsistent POR behavior. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3837K33DBVR | Non-automotive version; same electrical specs but −40°C to 85°C temp range and no AEC-Q100 qualification | Not suitable for under-hood or safety-critical modules; acceptable for cabin infotainment or aftermarket accessories | Select only if automotive qualification and extended temperature range are not required |
| TLV803EB33DBVR | Lower supply current (150 nA), fixed 10 ms delay, no CT pin; 2.93 V threshold, SOT-23-5, −40°C to 125°C | Lacks programmable delay - limits flexibility in systems requiring longer reset hold times for peripheral initialization | Choose when ultra-low power dominates design priority and 200 ms delay is unnecessary |
Compared with TPS3837K33QDBVRQ1, TPS3837K33DBVR omits automotive qualification and thermal range, while TLV803EB33DBVR trades delay configurability for lower quiescent current - both require validation of MR timing and output drive compatibility in target MCU reset circuits.
Availability
TPS3837K33QDBVRQ1 is available at Aetrix Electronics and suitable for automotive engine control, ADAS sensor fusion, and telematics applications requiring stable component supply across long production lifecycles.
Supply support for TPS3837K33QDBVRQ1 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The TPS3837-Q1 family was designed specifically for automotive power-supply monitoring, emphasizing nanopower operation, AEC-Q100 qualification, and hardware-configurable reset timing to simplify safety-critical system design.
FAQ
What is the exact reset threshold voltage of the TPS3837K33QDBVRQ1?
The TPS3837K33QDBVRQ1 has a nominal reset threshold voltage of 2.93 V, with a guaranteed range of 2.82 V to 3.10 V over −40°C to 125°C. This value is factory-trimmed and specified in the Electrical Characteristics table of the SGLS141A datasheet, making it suitable for precise supervision of 3.3 V rails in automotive environments.
Does the TPS3837K33QDBVRQ1 support both 10 ms and 200 ms reset delays?
Yes, the TPS3837K33QDBVRQ1 supports both delay options via the CT pin: connecting CT to GND selects a typical 10 ms delay, while connecting CT to VDD selects a typical 200 ms delay. These values are measured under defined test conditions (RL = 1 MΩ, CL = 50 pF) and appear in the Timing Requirements section of the datasheet.
Is the RESET output of the TPS3837K33QDBVRQ1 push-pull or open-drain?
The TPS3837K33QDBVRQ1 features an active-high push-pull RESET output, distinct from the TPS3836 (active-low push-pull) and TPS3838 (active-low open-drain) variants. This allows direct connection to MCUs requiring high-asserted reset signals without external pullup resistors.
What is the maximum supply voltage rating for the TPS3837K33QDBVRQ1?
The absolute maximum supply voltage (VDD) for the TPS3837K33QDBVRQ1 is 7 V, as specified in the Absolute Maximum Ratings table. However, the recommended operating range is 1.6 V to 6 V; operation at 7 V is limited to ≤1000 hours continuous to ensure reliability.
How does the manual reset (MR) pin function on the TPS3837K33QDBVRQ1?
The MR pin on the TPS3837K33QDBVRQ1 is an active-low asynchronous input that forces RESET low regardless of VDD level. It has −200 µA low-level input current and an internal 30 kΩ pullup resistor, allowing direct connection to a switch or GPIO without external components when used in automotive systems.
TPS3837K33QDBVRQ1 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:
- 2.93V
- 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
TPS3837K33QDBVRQ1 FAQ
1.How can I place an order for TPS3837K33QDBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3837K33QDBVRQ1 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 TPS3837K33QDBVRQ1 reliable?
The price and inventory of TPS3837K33QDBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3837K33QDBVRQ1 is usually 5 days.
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5.How can I obtain technical support or documentation for TPS3837K33QDBVRQ1?
For technical support, including TPS3837K33QDBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3837K33QDBVRQ1 requirements.
6.How does Aetrix verify that TPS3837K33QDBVRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS3837K33QDBVRQ1 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 TPS3837K33QDBVRQ1 meets industry standards.
7.What is the process for return or replacement of TPS3837K33QDBVRQ1?
All TPS3837K33QDBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3837K33QDBVRQ1, 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 TPS3837K33QDBVRQ1 part is unused and in its original packaging.
Return procedure for TPS3837K33QDBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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