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Texas Instruments TPS3837L30DBVR
- Part No.:
- TPS3837L30DBVR
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS3837L30DBVR.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,257
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Product details
Overview
TPS3837L30DBVR from Texas Instruments is a nano-power voltage supervisor IC with active-high push-pull RESET output, 2.64 V threshold voltage (VIT), 220 nA typical supply current, and selectable 10 ms or 200 ms reset delay via CT pin-used for reliable power-on and undervoltage reset in ultra-low-power MSP430-based systems.
For engineers reviewing the TPS3837L30DBVR datasheet, TPS3837L30DBVR pinout, TPS3837L30DBVR application, or TPS3837L30DBVR equivalent, key selection criteria include its precise 2.64 V supervision level, active-high push-pull output eliminating external pull-up needs, CT-configurable delay, manual reset support, and SOT-23-5 package compatibility with space-constrained battery-powered designs.
Technical Context
The TPS3837L30DBVR implements a precision bandgap-referenced comparator to monitor VDD against a fixed 2.64 V threshold (VIT) with 40 mV hysteresis (VHYS). Its internal timer initiates reset deassertion only after VDD exceeds VIT + VHYS and remains stable for the selected delay period (10 ms or 200 ms).
It features dual-input reset assertion logic: one path triggered by VDD falling below VIT, another by MR pin pulled low. Both paths drive the active-high push-pull RESET output with 10 µs typical propagation delay (tPLH), enabling fast, deterministic system initialization in microcontroller and DSP applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.6 V to 6 V - supports direct monitoring of Li-ion (3.6 V), 3.3 V, and 2.5 V rails without external regulation. |
| Threshold Voltage (VIT) | 2.64 V (typical) - precisely matches 3.0 V nominal supply systems requiring 2.64 V undervoltage lockout. |
| Reset Output Type | Active-high push-pull - eliminates need for external pull-up resistor, reducing BOM count and board area. |
| Supply Current (IDD) | 220 nA (typical) at VDD > VIT, VDD < 3 V - enables multi-year operation on coin-cell or lithium primary batteries. |
| Reset Delay Options | 10 ms (CT = GND) or 200 ms (CT = VDD) - configurable timing ensures robust release after brownout recovery. |
| Operating Temperature | –40°C to +85°C - qualified for industrial and portable equipment environments without derating. |
| Propagation Delay (tPLH) | 10 µs (typical) - guarantees rapid response to MR assertion or VDD recovery, critical for real-time MCU reset sequencing. |
Pinout & Package
TPS3837L30DBVR is housed in a 5-pin SOT-23 (DBV) package, 2.90 mm × 1.60 mm body size, with exposed pad not connected. Pin 1 is CT; Pin 2 is GND; Pin 3 is MR; Pin 4 is RESET; Pin 5 is VDD.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CT (Pin 1) | Delay configuration input | Connect to GND for 10 ms delay or to VDD for 200 ms delay; draws <25 nA, enabling direct connection without loading. |
| GND (Pin 2) | Ground reference | Primary return path for internal comparator and output driver; requires low-impedance PCB connection to minimize noise coupling. |
| MR (Pin 3) | Manual reset input | Active-low logic input; internal 30 kΩ pull-up allows floating-to-VDD default; asserts RESET high within 10 µs when pulled low. |
| RESET (Pin 4) | Active-high push-pull output | Drives high (VDD) when inactive, low (GND) when asserted; sinks/source up to 2 mA, compatible with standard CMOS inputs. |
| VDD (Pin 5) | Supply and sense input | Monitors system rail directly; internal ESD protection rated to ±4 kV HBM; bypass capacitor (0.1 µF ceramic) required near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Nano-power operation | 220 nA typical IDD extends battery life in always-on sensors and wearables beyond 10 years on CR2032. |
| Fixed 2.64 V threshold | Matches 3.0 V system brownout requirements per JEDEC JESD8-12; ±1.5% tolerance over temperature ensures consistent trip point. |
| Selectably timed reset | Hardware-selectable 10/200 ms delay avoids firmware dependency and guarantees timing accuracy across voltage/temp variations. |
| Active-high push-pull output | Eliminates external pull-up resistor, reduces component count, and prevents floating-state uncertainty during power transitions. |
| Integrated manual reset | MR pin with internal 30 kΩ pull-up simplifies board layout; supports hardware-initiated reset without additional logic or switches. |
Applications
| Portable Medical Sensors | MSP430-Based Data Loggers |
|---|---|
Use Scenario: Continuous glucose monitor powered by CR2032 coin cell, requiring guaranteed reset if battery drops below 2.6 V. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-high RESET to wake MSP430 from LPM4 only when VDD ≥ 2.64 V + 40 mV for 200 ms. Use Value: Prevents erratic MCU behavior during battery depletion while minimizing quiescent current to extend usable sensor life to >3 years. |
Use Scenario: Environmental data logger sampling temperature/humidity every 10 minutes using MSP430FR5969, powered by Li-SOCl₂ battery. IC Role / Device Role / Timing Role: Monitors main 3.6 V supply and triggers active-high RESET on undervoltage, synchronized with MR-initiated calibration reset. Use Value: Ensures deterministic boot sequence after power interruption and enables field-serviceable recalibration without firmware update. |
| Wireless IoT End Nodes | Industrial Handheld Terminals |
Use Scenario: LoRaWAN node with SX1276 transceiver and MSP430, operating intermittently on AA alkaline cells. IC Role / Device Role / Timing Role: Supervises 3.0 V regulated rail; asserts RESET high upon valid power-up and holds until 200 ms stability confirmed. Use Value: Guarantees clean radio initialization and eliminates spurious transmit attempts caused by marginal supply conditions. |
Use Scenario: Ruggedized barcode scanner using MSP430F5438A, subjected to frequent thermal cycling and vibration. IC Role / Device Role / Timing Role: Provides fail-safe reset during cold-start and brownout events; MR pin tied to front-panel reset button. Use Value: Enables user-initiated recovery without power cycle, improving field uptime and reducing service calls. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3837K33DBVR | 3.3 V nominal supply variant; 2.93 V threshold (VIT), same 220 nA IDD, identical pinout and delay options. | Designed for 3.3 V systems; unsuitable where 3.0 V rail must be monitored at 2.64 V trip point. | Select TPS3837K33DBVR only when supervising 3.3 V supplies requiring ~2.93 V undervoltage detection. |
| TPS3836L30DBVR | Same 2.64 V threshold and SOT-23-5 package, but active-low push-pull RESET output instead of active-high. | Requires redesign of MCU reset input logic (active-low vs. active-high); no change to power or timing circuitry. | Choose TPS3836L30DBVR only if target MCU reset pin is active-low and board layout cannot accommodate signal inversion. |
Compared with TPS3837K33DBVR and TPS3836L30DBVR, the TPS3837L30DBVR uniquely combines 2.64 V supervision, active-high output, and SOT-23-5 footprint-making it the only drop-in solution for MSP430 designs requiring precise 3.0 V brownout detection with zero external components on the RESET line.
Availability
TPS3837L30DBVR is available at Aetrix Electronics and suitable for portable medical sensors, MSP430-based data loggers, and wireless IoT end nodes requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for TPS3837L30DBVR 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 delivering analog and embedded processing solutions, with leadership in low-power design and precision analog IP.
The TPS383x family was developed specifically for ultra-low-power microcontroller supervision in battery-critical applications-emphasizing nano-amp quiescent current, factory-trimmed thresholds, and hardware-configurable timing without firmware overhead.
FAQ
What is the exact reset threshold voltage of the TPS3837L30DBVR?
The TPS3837L30DBVR has a nominal threshold voltage (VIT) of 2.64 V, with a guaranteed range of 2.56 V to 2.69 V over –40°C to +85°C. This value is factory-trimmed and specified in the Electrical Characteristics table of the SLVS292F datasheet under "TPS383xL30" row. The 2.64 V threshold is optimized for 3.0 V supply systems requiring precise undervoltage lockout.
Does the TPS3837L30DBVR require an external pull-up resistor on the RESET pin?
No, the TPS3837L30DBVR does not require an external pull-up resistor because it features an active-high push-pull RESET output. Unlike open-drain variants (e.g., TPS3838), this device actively drives both high (to VDD) and low (to GND), ensuring defined logic states without external components-reducing BOM cost and PCB area in compact designs.
How is the reset delay time configured on the TPS3837L30DBVR?
The reset delay time on the TPS3837L30DBVR is configured solely by the CT pin: connect CT to GND for a typical 10 ms delay, or to VDD for a typical 200 ms delay. No external capacitor is needed. This hardware-selectable method ensures timing accuracy independent of temperature, voltage, or firmware-critical for reliable power-on sequencing in safety-aware applications.
Can the TPS3837L30DBVR be used with a 1.8 V supply rail?
No, the TPS3837L30DBVR is not suitable for 1.8 V supply supervision. Its 2.64 V threshold is designed for 3.0 V systems. For 1.8 V rails, TI offers the TPS3837E18DBVR (1.71 V threshold). Using TPS3837L30DBVR on a 1.8 V rail would result in permanent RESET assertion, as VDD never exceeds VIT, preventing proper system operation.
What is the maximum supply voltage rating for the TPS3837L30DBVR?
The TPS3837L30DBVR has an absolute maximum VDD rating of 7 V, but its recommended operating range is 1.6 V to 6 V. Exceeding 6 V may cause excessive current draw or timing deviation, while operation below 1.6 V fails to guarantee proper reset assertion. Always use a 0.1 µF ceramic bypass capacitor between VDD and GND to maintain stability under transient load conditions.
TPS3837L30DBVR 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TPS3837L30DBVR FAQ
1.How can I place an order for TPS3837L30DBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3837L30DBVR 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 TPS3837L30DBVR reliable?
The price and inventory of TPS3837L30DBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3837L30DBVR is usually 5 days.
3.What payment methods are accepted for TPS3837L30DBVR?
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TPS3837L30DBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3837L30DBVR 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 TPS3837L30DBVR?
For technical support, including TPS3837L30DBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3837L30DBVR requirements.
6.How does Aetrix verify that TPS3837L30DBVR is sourced from the original manufacturer or authorized distributors?
All TPS3837L30DBVR 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 TPS3837L30DBVR meets industry standards.
7.What is the process for return or replacement of TPS3837L30DBVR?
All TPS3837L30DBVR units undergo pre-shipment inspection (PSI). If there is an issue with TPS3837L30DBVR, 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 TPS3837L30DBVR part is unused and in its original packaging.
Return procedure for TPS3837L30DBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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