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Texas Instruments TPS3808EG01DBVR
- Part No.:
- TPS3808EG01DBVR
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
TPS3808EG01DBVR.pdf
- Description:
- 600NA ULTRA-LOW QUIESCENT CURREN
- Quantity:
- Payment:
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Product details
Overview
TPS3808EG01DBVR from Texas Instruments is an ultra-low-quiescent-current (0.6 µA typical), adjustable-threshold (0.405 V) supervisory circuit in a 6-pin SOT-23 package. It monitors system supply rails via a dedicated SENSE pin, asserts an open-drain RESET signal on undervoltage or manual reset assertion, and supports user-programmable delay from 1.25 ms to 10 s-ideal for battery-powered microprocessor systems requiring precise power-on sequencing.
For engineers reviewing the TPS3808EG01DBVR datasheet, TPS3808EG01DBVR pinout, TPS3808EG01DBVR application, or TPS3808EG01DBVR equivalent, key selection considerations include its 0.405 V adjustable threshold accuracy (±0.5% typical), -40°C to +125°C operating range, CT-capacitor-based delay programming, MR input with 90 kΩ internal pull-up, and open-drain RESET output requiring external pull-up (10 kΩ–1 MΩ).
Technical Context
The TPS3808EG01DBVR implements a precision bandgap reference and comparator architecture to achieve ±0.5% threshold accuracy over temperature. Its SENSE input operates independently of VDD, enabling accurate monitoring of voltages as low as 0.405 V without external resistor dividers when used in adjustable mode.
Reset timing is controlled by an internal 220 nA current source charging an external capacitor on the CT pin; delay is programmable from 1.25 ms to 10 s. The device features built-in hysteresis (1–2.5%), glitch immunity (5 µs on SENSE, 50 ns on MR), and operates across 1.7 V–6 V VDD while maintaining sub-1.5 µA max supply current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Threshold Voltage | 0.405 V nominal, ±0.5% typical accuracy - enables direct monitoring of low-voltage rails like 0.5 V core supplies without external dividers. |
| Quiescent Current | 0.6 µA typical at 3.3 V - extends battery life in always-on IoT sensors and portable medical devices. |
| Reset Delay Range | 1.25 ms to 10 s via CT capacitor - supports diverse MCU boot requirements from fast microcontrollers to complex SoCs. |
| Operating Temperature | -40°C to +125°C junction - qualified for under-hood automotive modules and industrial motor drives. |
| Output Type | Open-drain RESET - allows level-shifting up to 6 V and wired-OR configuration with other reset sources. |
| MR Input Pull-up | 90 kΩ internal resistor - eliminates external components when manual reset is unused, reducing BOM count. |
| Hysteresis | 1–2.5% of VIT - prevents chatter during slow-rising/falling supply transitions in noisy power environments. |
Pinout & Package
TPS3808EG01DBVR is housed in a compact 6-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm, optimized for space-constrained PCB layouts in portable and embedded systems.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: RESET | Open-drain output | Asserts low during undervoltage or MR activation; requires external pull-up (10 kΩ–1 MΩ) to set logic-high voltage level. |
| 2: GND | Ground reference | Primary return path for internal circuitry and SENSE comparator; must be low-impedance connection to system ground plane. |
| 3: MR | Manual reset input | Logic-low (≤0.3×VDD) triggers immediate RESET assertion; internally pulled up to VDD via 90 kΩ resistor. |
| 4: CT | Delay timing control | Connects to external capacitor (≥130 pF) to program reset timeout; open = 20 ms, tied to VDD via 40–200 kΩ = 300 ms. |
| 5: SENSE | Monitoring input | High-impedance input (±25 nA leakage) for direct connection to rail under supervision; independent of VDD supply voltage. |
| 6: VDD | Supply input | Power source (1.7–6 V); requires local 0.1 µF ceramic decoupling capacitor for stable reference operation. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable 0.405 V threshold | Enables direct monitoring of sub-1 V rails (e.g., FPGA core, AI accelerator supplies) without external resistor network. |
| 0.6 µA quiescent current | Reduces standby power in battery-backed systems-e.g., smart meters retain >10-year shelf life with this IC. |
| CT-capacitor programmable delay | Eliminates need for multiple fixed-delay variants; one BOM item covers 1.25 ms–10 s timing across product families. |
| Separate SENSE and VDD pins | Allows monitoring of isolated or higher-voltage rails (up to 6 V) while powered from a lower auxiliary supply. |
| 125°C rated operation | Supports placement near heat-generating components (e.g., DC-DC converters, motor drivers) without derating. |
Applications
| Electricity Meter | Rack Server Motherboard |
|---|---|
Use Scenario: Monitors backup supercapacitor voltage during main AC failure to initiate graceful shutdown and secure data logging. IC Role / Device Role / Timing Role: Supervisory circuit asserting RESET to microcontroller when backup rail drops below 0.405 V, with 100 ms delay to allow firmware save operations. Use Value: Prevents EEPROM corruption and ensures regulatory compliance for revenue-grade metering data integrity. | Use Scenario: Validates 12 V intermediate bus and 3.3 V management rail before releasing CPU reset during cold boot. IC Role / Device Role / Timing Role: Dual-rail supervisor using two TPS3808EG01DBVR units (one per rail) with cascaded MR/RESET signaling to enforce strict power sequencing order. Use Value: Eliminates risk of latch-up or I/O contention during multi-rail power-up in high-density server platforms. |
| DC-input BLDC Motor Drive | Surgical Equipment |
Use Scenario: Detects undervoltage on 24 V DC input prior to gate driver enable, preventing partial FET turn-on and shoot-through faults. IC Role / Device Role / Timing Role: Primary safety monitor asserting hardware RESET to motor control MCU within 5 ms of 24 V sag below 22.5 V (via resistor divider on SENSE). Use Value: Meets IEC 61800-5-2 functional safety requirements for drive fault response time without software intervention. | Use Scenario: Ensures stable 1.8 V FPGA configuration voltage before releasing system reset in real-time imaging subsystems. IC Role / Device Role / Timing Role: Low-noise supervisor with 0.405 V threshold scaled via precision divider to monitor 1.8 V rail with ±1% trip accuracy over temperature. Use Value: Guarantees deterministic FPGA configuration and eliminates boot failures in life-critical diagnostic equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G01DBVR | Same pinout and function but standard grade (–40°C to 85°C); lacks AEC-Q100 qualification and extended temp support. | Not suitable for under-hood automotive or industrial ambient >85°C; identical electrical specs otherwise. | Select TPS3808G01DBVR only for cost-sensitive commercial applications where full –40°C to 125°C operation is unnecessary. |
| MAX6326UT29D3+T | Fixed 2.93 V threshold, 200 ms factory-set delay, 1.6 µA quiescent current, SOT-23-5 package (no MR pin). | Lacks manual reset and adjustable delay; higher IDD reduces battery life; incompatible pinout (5-pin vs 6-pin). | Choose MAX6326UT29D3+T only when fixed 2.93 V monitoring suffices and MR functionality is not required. |
Compared with TPS3808EG01DBVR, TPS3808G01DBVR trades extended temperature capability for lower cost, while MAX6326UT29D3+T sacrifices adjustability and MR flexibility for simpler integration in fixed-threshold designs-neither offers drop-in replacement due to thermal or pinout differences.
Availability
TPS3808EG01DBVR is available at Aetrix Electronics and suitable for electricity metering, rack server motherboard design, DC-input BLDC motor drives, surgical equipment, and single-board computer development requiring stable component supply across extended temperature ranges.
Supply support for TPS3808EG01DBVR 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 solutions for industrial, automotive, and personal electronics markets.
The TPS3808E family was designed specifically for ultra-low-power, high-accuracy power-supply monitoring in battery-critical and thermally demanding applications-emphasizing precision threshold stability, flexible timing, and robust ESD immunity (±2 kV HBM).
FAQ
What is the exact threshold voltage and accuracy of the TPS3808EG01DBVR?
The TPS3808EG01DBVR has a nominal threshold voltage of 0.405 V with ±0.5% typical accuracy over temperature (–40°C to +125°C). This specification is achieved using an internal precision bandgap reference and is confirmed in the Electrical Characteristics table of the official TI datasheet SNVSCE0B. The TPS3808EG01DBVR does not require external resistors to set this threshold, making it ideal for monitoring low-voltage rails directly.
How is the reset delay time configured on the TPS3808EG01DBVR?
The reset delay time on the TPS3808EG01DBVR is configured via the CT pin: leaving CT open yields ~20 ms, connecting CT to VDD through a 40–200 kΩ resistor yields ~300 ms, and connecting CT to GND via a capacitor (≥130 pF) enables user-programmable delays from 1.25 ms to 10 s. The TPS3808EG01DBVR uses an internal 220 nA current source to charge the capacitor, and timing is validated across temperature per Figure 7-2 in the datasheet.
Does the TPS3808EG01DBVR support manual reset, and how is it implemented?
Yes, the TPS3808EG01DBVR includes a dedicated MR (Manual Reset) input (Pin 3) that asserts RESET when driven to ≤0.3×VDD. The MR pin features an internal 90 kΩ pull-up to VDD, allowing it to float if unused. This feature enables external processors or logic to trigger system reset on demand-verified in the Pin Functions table and Truth Table (Section 8.4.1) of the TPS3808EG01DBVR datasheet.
What package type and dimensions does the TPS3808EG01DBVR use?
The TPS3808EG01DBVR is packaged in a 6-pin SOT-23 (DBV) case with nominal body dimensions of 2.90 mm × 1.60 mm. This package is RoHS-compliant, lead-free (NiPdAu finish), and rated MSL Level-1 (unlimited floor life at ≤30°C/60% RH). Mechanical details are specified in TI's Packaging Information document and confirmed in the Orderable Addendum for TPS3808EG01DBVR.
Can the TPS3808EG01DBVR monitor voltages higher than its VDD supply?
Yes, the TPS3808EG01DBVR can monitor voltages up to 6 V on the SENSE pin while powered from a lower VDD (1.7–6 V), thanks to its separate SENSE and VDD inputs. This isolation allows safe supervision of higher intermediate rails (e.g., 5 V, 12 V via resistor divider) without exposing the IC's supply domain to overvoltage-confirmed in Section 6.3 (Recommended Operating Conditions) and Figure 8-3 of the TPS3808EG01DBVR datasheet.
TPS3808EG01DBVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- -
- Type:
- Monitor
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 0.405V
- 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:
- SOT-23-6
TPS3808EG01DBVR FAQ
1.How can I place an order for TPS3808EG01DBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3808EG01DBVR 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 TPS3808EG01DBVR reliable?
The price and inventory of TPS3808EG01DBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3808EG01DBVR is usually 5 days.
3.What payment methods are accepted for TPS3808EG01DBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3808EG01DBVR transactions.
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4.How is shipping managed for TPS3808EG01DBVR?
TPS3808EG01DBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3808EG01DBVR 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 TPS3808EG01DBVR?
For technical support, including TPS3808EG01DBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3808EG01DBVR requirements.
6.How does Aetrix verify that TPS3808EG01DBVR is sourced from the original manufacturer or authorized distributors?
All TPS3808EG01DBVR 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 TPS3808EG01DBVR meets industry standards.
7.What is the process for return or replacement of TPS3808EG01DBVR?
All TPS3808EG01DBVR units undergo pre-shipment inspection (PSI). If there is an issue with TPS3808EG01DBVR, 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 TPS3808EG01DBVR part is unused and in its original packaging.
Return procedure for TPS3808EG01DBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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