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Texas Instruments TPS3818G25DRVR
- Part No.:
- TPS3818G25DRVR
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
TPS3818G25DRVR.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 6WSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,981
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Product details
Overview
TPS3818G25DRVR from Texas Instruments is a low-quiescent-current, fixed-threshold supervisory IC that monitors 2.5V system rails and asserts an open-drain RESET signal when the SENSE voltage drops below 2.33V (±0.5% accuracy). It supports user-programmable reset delay from 1.25ms to 10s via external capacitor on CT pin, operates from –40°C to +125°C, and is used in battery-powered microcontroller systems requiring precise power-on reset timing.
For engineers reviewing the TPS3818G25DRVR datasheet, TPS3818G25DRVR pinout, TPS3818G25DRVR application, or TPS3818G25DRVR equivalent, key selection criteria include its 2.33V threshold accuracy, 2.4µA typical supply current, 6-pin WSON (DRV) package with exposed thermal pad, and compatibility with OMAP1510 and similar low-voltage processors in portable embedded designs.
Technical Context
The TPS3818G25DRVR integrates a precision bandgap reference and comparator with 0.5% threshold accuracy for VIT ≤3.3V, enabling reliable detection of undervoltage conditions on 2.5V rails. Its internal 220nA CT charging current and 1.23V CT comparator threshold allow accurate delay calculation across temperature.
It features an open-drain RESET output with 0.4V max VOL at 1mA load, MR input with 90kΩ internal pull-up, and hysteresis of 1.0–2.5% VIT to prevent chatter during slow-rising supply transitions. The device remains functional over 1.7–6.5V VDD and supports RESET assertion even when VDD falls to 0.8V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Threshold Voltage (VIT) | 2.33V ±0.5% - precisely matches 2.5V rail monitoring with minimal guardband required |
| Quiescent Current (IDD) | 2.4µA typ - enables multi-year operation in coin-cell–powered IoT sensors |
| Reset Delay Range | 1.25ms to 10s - programmable via external CT capacitor ≥100pF, no resistor needed |
| Operating Temperature | –40°C to +125°C - fully specified for automotive under-hood and industrial control environments |
| Output Type | Open-drain RESET - allows level-shifting up to 6.5V and wired-OR with other reset sources |
| MR Input Logic | VIL = 0.3VDD, VIH = 0.7VDD - compatible with 1.8V/3.3V GPIO without level shifters |
| Hysteresis (VHYS) | 1.0–2.5% VIT - ensures clean, chatter-free reset deassertion during supply ramp-up |
Pinout & Package
TPS3818G25DRVR uses the DRV (WSON-6) package: 2mm × 2mm, 0.8mm max height, with exposed thermal pad (Pin 7) soldered to PCB ground for thermal and mechanical stability. Pin 1 index area located at top-left corner; pinout is identical to DBV (SOT-23-6) but with different physical layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Open-drain reset output | Drives low when SENSE < 2.33V or MR = low; requires external pull-up (10kΩ–1MΩ) to set logic-high voltage |
| 2 - GND | Ground reference | Primary return path for internal circuitry; must be connected to low-impedance system ground plane |
| 3 - MR | Manual reset input | Asserts RESET when pulled ≤0.3VDD; internally pulled up to VDD via 90kΩ resistor |
| 4 - CT | Reset delay timing control | Connects to external capacitor (≥100pF) to set delay; internal 220nA current charges to 1.23V threshold |
| 5 - SENSE | Monitored voltage input | Directly senses 2.5V rail; comparator triggers at 2.33V with built-in hysteresis to reject noise |
| 6 - VDD | Supply input | Operates from 1.7V to 6.5V; decoupling with 0.1µF ceramic capacitor required adjacent to pin |
| 7 - PowerPAD™ | Thermal and electrical ground | Exposed copper pad; must be soldered to PCB ground plane for thermal dissipation and EMI reduction |
Key Features
| Feature | Design Value |
|---|---|
| 0.5% threshold accuracy | Enables tight margining on 2.5V rails without derating, reducing need for higher-voltage supervisors |
| 2.4µA quiescent current | Extends battery life in always-on sensor nodes and wearables where standby current dominates lifetime |
| Programmable 1.25ms–10s delay | Eliminates need for external RC timers or microcontroller firmware delays in power sequencing |
| –40°C to +125°C operation | Supports deployment in automotive engine control units and industrial motor drives without derating |
| Open-drain RESET with 6.5V tolerance | Allows direct interface to 3.3V/5V microcontrollers and enables reset signal sharing across multiple domains |
Applications
| Industrial PLC I/O Modules | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Monitoring 2.5V core supply for ARM-based microcontrollers in programmable logic controllers subject to wide ambient temperature swings and conducted EMI. IC Role / Device Role / Timing Role: Supervisory circuit providing power-on reset with 200ms minimum delay after cold start, ensuring stable clock and memory initialization before firmware execution. Use Value: Prevents lockup during brownout recovery by guaranteeing reset pulse width exceeds processor's minimum reset hold time, even at –40°C. |
Use Scenario: Reset coordination for CAN transceivers and LIN subsystems powered from a shared 2.5V LDO in vehicle body electronics. IC Role / Device Role / Timing Role: Centralized reset generator asserting synchronized RESET to multiple ICs after main battery reaches regulation, with MR tied to ignition switch signal. Use Value: Eliminates race conditions between subsystems by enforcing deterministic power-up sequence across voltage domains. |
| Portable Medical Sensors | Edge AI Accelerator Boards |
|
Use Scenario: Ultra-low-power glucose monitor using coin-cell battery and BLE SoC, where every nanoamp impacts shelf life. IC Role / Device Role / Timing Role: Primary supervisor for 2.5V analog front-end and digital core, with CT pin left unconnected for factory-set 20ms delay to minimize BOM count. Use Value: Achieves 2.4µA total system standby current while maintaining guaranteed reset assertion during battery voltage sag. |
Use Scenario: FPGA-based vision processing board with dual 2.5V supplies (core and I/O), requiring coordinated reset after power stabilization. IC Role / Device Role / Timing Role: Dual-rail monitor using SENSE tied to core rail and MR driven by FPGA configuration done signal to gate post-configuration reset. Use Value: Enables safe reconfiguration cycle without risking partial state corruption due to asynchronous resets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3818G25DRVT | Same silicon, identical electrical specs; differs only in tape-and-reel packaging (250 pcs vs 3000 pcs) and MSL rating (Level-1 vs Level-2) | Identical functional use; selected for high-volume automated assembly requiring larger reels | Choose DRVT for production runs >5k units; DRVR is optimal for prototyping and low-volume builds |
| TPS3808G25DBVR | Higher quiescent current (8µA typ), ±1.5% threshold accuracy, fixed 200ms delay (no CT pin), SOT-23-6 package | Lacks programmable delay and thermal pad; less accurate for tight-margin 2.5V systems | Select only if delay flexibility and sub-1% accuracy are unnecessary and cost is primary constraint |
Compared with TPS3818G25DRVR, TPS3818G25DRVT offers identical performance in volume production, while TPS3808G25DBVR trades accuracy and programmability for lower unit cost-making DRVR the optimal balance for design-in where long battery life and precise timing are critical.
Availability
TPS3818G25DRVR is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, and portable medical sensors requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for TPS3818G25DRVR 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 power management, signal chain, and high-reliability ICs.
The TPS3818 family is designed for ultra-low-power, high-accuracy voltage supervision in battery-operated and thermally demanding applications-targeting microcontroller, DSP, and FPGA power sequencing where precision reset timing is non-negotiable.
FAQ
What is the exact threshold voltage and accuracy of the TPS3818G25DRVR?
The TPS3818G25DRVR has a nominal threshold voltage of 2.33V with ±0.5% accuracy over –40°C to +85°C, and ±1.25% over –40°C to +125°C. This specification applies specifically to the G25 variant and is verified per TI's SBVS106A datasheet. The 2.33V value is factory-trimmed to match the 2.5V rail, ensuring minimal headroom requirement in system design.
Can the TPS3818G25DRVR be used with a 1.8V supply voltage?
Yes, the TPS3818G25DRVR operates with VDD from 1.7V to 6.5V, so it functions reliably at 1.8V. However, the SENSE pin still monitors a 2.5V rail-the 1.8V supply powers the supervisor itself, not the monitored voltage. The MR and RESET logic levels scale with VDD, maintaining compatibility with 1.8V GPIO interfaces.
How is the reset delay configured on the TPS3818G25DRVR?
The TPS3818G25DRVR reset delay is configured exclusively via the CT pin: connect a capacitor ≥100pF from CT to GND to achieve user-programmable delay from 1.25ms to 10s. No resistor is required. Leaving CT open yields 20ms; connecting CT to VDD via 40–200kΩ gives ~300ms. The delay is determined by internal 220nA current charging the capacitor to 1.23V.
Does the TPS3818G25DRVR require an external pull-up resistor on the RESET pin?
Yes, the TPS3818G25DRVR RESET pin is open-drain and requires an external pull-up resistor (10kΩ to 1MΩ) to the desired logic-high voltage-up to 6.5V. This enables level-shifting and wired-OR configurations. Without the pull-up, RESET cannot assert a valid high state, causing system boot failure.
What is the role of the PowerPAD™ on the TPS3818G25DRVR DRV package?
The PowerPAD™ (Pin 7) on the TPS3818G25DRVR is an exposed thermal pad that must be soldered to the PCB ground plane. It provides critical thermal dissipation (θJA = 290°C/W) and mechanical stability. TI documentation specifies ≥88% solder coverage and recommends vias to inner ground layers-omitting this step risks thermal shutdown or solder joint fatigue in high-temperature operation.
TPS3818G25DRVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 6-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.33V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 180ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-WSON (2x2)
TPS3818G25DRVR FAQ
1.How can I place an order for TPS3818G25DRVR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3818G25DRVR 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 TPS3818G25DRVR reliable?
The price and inventory of TPS3818G25DRVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3818G25DRVR is usually 5 days.
3.What payment methods are accepted for TPS3818G25DRVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3818G25DRVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS3818G25DRVR?
TPS3818G25DRVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3818G25DRVR 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 TPS3818G25DRVR?
For technical support, including TPS3818G25DRVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3818G25DRVR requirements.
6.How does Aetrix verify that TPS3818G25DRVR is sourced from the original manufacturer or authorized distributors?
All TPS3818G25DRVR 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 TPS3818G25DRVR meets industry standards.
7.What is the process for return or replacement of TPS3818G25DRVR?
All TPS3818G25DRVR units undergo pre-shipment inspection (PSI). If there is an issue with TPS3818G25DRVR, 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 TPS3818G25DRVR part is unused and in its original packaging.
Return procedure for TPS3818G25DRVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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