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Texas Instruments TPS3808EG15DBVR
- Part No.:
- TPS3808EG15DBVR
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
TPS3808EG15DBVR.pdf
- Description:
- 600NA ULTRA-LOW QUIESCENT CURREN
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
TPS3808EG15DBVR from Texas Instruments is a low-quiescent-current, programmable-delay supervisory circuit designed to monitor 1.5V power rails in embedded systems. It features ±0.5% threshold accuracy (1.40V nominal), 0.6μA typical supply current, 20ms/300ms fixed or 1.25ms–10s capacitor-programmable reset delay, and operates across –40°C to +125°C. It is used in DC-input BLDC motor drives to ensure safe microcontroller startup after undervoltage events.
For engineers reviewing the TPS3808EG15DBVR datasheet, TPS3808EG15DBVR pinout, TPS3808EG15DBVR application, or TPS3808EG15DBVR equivalent, key selection considerations include its 1.40V undervoltage threshold with 1% typical accuracy, open-drain RESET output requiring external pull-up, SOT-23-6 package compatibility, manual reset (MR) input for system-initiated resets, and CT-pin-based delay configuration options.
Technical Context
The TPS3808EG15DBVR implements a precision voltage comparator with internal 0.4V reference and resistor-divider-independent threshold setting for 1.5V rails. Its reset assertion logic responds to either SENSE voltage falling below 1.40V or MR pin pulled low, holding RESET asserted for a user-defined delay after both conditions clear.
It uses an on-chip 220nA current source to charge an external CT capacitor, enabling accurate timing from 1.25ms to 10s; CT left open yields 20ms, tied to VDD via 40–200kΩ yields 300ms. The device includes built-in hysteresis (1–2.5%), glitch immunity (5μs on SENSE, 50ns on MR), and operates with VDD from 1.7V to 6V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Threshold Voltage (VIT) | 1.40V ±0.5% - precisely monitors 1.5V rail with minimal tolerance drift over temperature. |
| Quiescent Current (IDD) | 0.6μA typical at 3.3V - enables multi-year battery life in always-on monitoring applications. |
| Reset Delay Range | 1.25ms–10s programmable via CT capacitor - supports diverse MCU boot timing requirements without firmware changes. |
| Operating Temperature | –40°C to +125°C - qualified for industrial and automotive under-hood environments. |
| Output Type | Open-drain RESET - allows level-shifting up to 6V and wired-OR with other reset sources. |
| SENSE Input Bias | ≤1.25μA at 6V - minimizes loading on monitored rail and avoids interference with sensitive analog supplies. |
| Hysteresis | 1–2.5% of VIT - prevents chatter during slow-rising/falling supply transitions near threshold. |
Pinout & Package
TPS3808EG15DBVR is housed in a 6-pin SOT-23 (DBV) package measuring 2.90mm × 1.60mm, optimized for space-constrained PCB layouts in motor control and metering applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RESET (Pin 1) | Open-drain output | Drives low during reset assertion; requires external 10kΩ–1MΩ pull-up to define logic-high voltage (up to 6V). |
| GND (Pin 2) | Ground reference | Primary return path for internal circuitry and CT capacitor discharge; must be low-impedance. |
| MR (Pin 3) | Manual reset input | Logic-low (≤0.3×VDD) asserts RESET; internally pulled up to VDD via 90kΩ resistor. |
| CT (Pin 4) | Reset delay programming | Connect to GND via capacitor ≥130pF for programmable delay; open = 20ms, tied to VDD = 300ms. |
| SENSE (Pin 5) | Voltage monitoring input | Directly connects to 1.5V rail; comparator triggers RESET if voltage drops below 1.40V. |
| VDD (Pin 6) | Supply input | Accepts 1.7–6V; requires local 0.1μF ceramic decoupling capacitor for stable reference operation. |
Key Features
| Feature | Design Value |
|---|---|
| ±0.5% threshold accuracy | Ensures reliable 1.5V rail monitoring across full temperature range without calibration. |
| 0.6μA quiescent current | Reduces standby power in battery-backed systems such as electricity meters and portable medical devices. |
| Programmable reset delay (1.25ms–10s) | Eliminates need for multiple fixed-delay parts; accommodates varying MCU initialization sequences. |
| Separate SENSE and VDD pins | Allows monitoring of independent voltage domains (e.g., 1.5V core rail while powered from 3.3V supply). |
| Glitch-immune MR and SENSE inputs | Rejects transients ≤5μs on SENSE and ≤50ns on MR, preventing spurious resets in noisy industrial environments. |
Applications
| DC-Input BLDC Motor Drive | Electricity Meter |
|---|---|
Use Scenario: Monitors 1.5V gate driver IC supply during power-up and fault recovery. IC Role / Device Role / Timing Role: Supervisory circuit asserting RESET until 1.5V rail stabilizes above 1.40V and remains valid for ≥20ms. Use Value: Prevents partial gate drive activation that could cause shoot-through or MOSFET damage during brownout conditions. | Use Scenario: Ensures secure boot of metrology SoC by validating 1.5V analog front-end supply before ADC initialization. IC Role / Device Role / Timing Role: Undervoltage detector with 1.40V threshold and 300ms delay to accommodate slow LDO settling in energy-harvesting designs. Use Value: Guarantees consistent meter calibration by blocking firmware execution until analog supply meets precision reference requirements. |
| Rack Server Motherboard | Surgical Equipment |
Use Scenario: Validates 1.5V FPGA I/O bank supply prior to configuration loading. IC Role / Device Role / Timing Role: Programmable-delay supervisor using CT capacitor to match FPGA configuration timeout (e.g., 100ms). Use Value: Eliminates need for external RC timing network, reducing BOM count and layout area on dense server backplanes. | Use Scenario: Monitors isolated 1.5V logic supply powering safety-critical microcontroller in real-time control loop. IC Role / Device Role / Timing Role: High-reliability supervisor with –40°C to +125°C rating and 1.40V threshold to enforce fail-safe shutdown on supply anomaly. Use Value: Meets IEC 60601-1 leakage and timing requirements by providing deterministic reset behavior under transient load conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G15DBVR | Same pinout and threshold (1.40V), but standard-grade (–40°C to +85°C) and higher quiescent current (1.1μA typical). | Not rated for extended temperature industrial use; unsuitable for BLDC motor drives operating at 125°C junction. | Select TPS3808G15DBVR only for cost-sensitive commercial applications where ambient temperature stays below 85°C. |
| MAX6326LT15D3+T | Fixed 1.5V threshold, 2.5μA quiescent current, 200ms fixed delay, SOT-23-5 package (no MR pin). | Lacks manual reset input and programmable delay; incompatible pinout prevents drop-in replacement. | Choose MAX6326LT15D3+T only when MR functionality is unnecessary and board layout allows SOT-23-5 footprint change. |
Compared with TPS3808G15DBVR, the TPS3808EG15DBVR provides guaranteed operation at +125°C and 45% lower quiescent current-critical for thermally constrained motor drives. Against MAX6326LT15D3+T, it offers design flexibility via MR input and CT-programmable delay, albeit with a 6-pin footprint.
Availability
TPS3808EG15DBVR is available at Aetrix Electronics and suitable for DC-input BLDC motor drives, electricity meters, and surgical equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TPS3808EG15DBVR 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 industrial ICs.
The TPS3808E product line delivers ultra-low-power, high-accuracy supervisory circuits for mission-critical power sequencing in industrial automation, energy infrastructure, and medical electronics-designed specifically for robustness under thermal stress and long-term reliability.
FAQ
What is the exact undervoltage threshold voltage of the TPS3808EG15DBVR?
The TPS3808EG15DBVR has a nominal undervoltage threshold (VIT) of 1.40V with ±0.5% accuracy over –40°C to +125°C. This value is factory-trimmed and applies specifically to the 1.5V nominal supply rail it is designated to monitor, as confirmed in TI's SNVSCE0B datasheet Table 4 and Section 6.5.
How does the CT pin configure reset delay time on the TPS3808EG15DBVR?
The CT pin on the TPS3808EG15DBVR sets reset delay via three configurations: left open for 20ms, tied to VDD through 40–200kΩ for 300ms, or connected to GND via capacitor ≥130pF for 1.25ms–10s programmable delay. The internal 220nA current source charges the capacitor to determine timing, per Equation 1 in the datasheet Section 8.3.2.
Can the TPS3808EG15DBVR monitor a voltage rail other than 1.5V?
No-the TPS3808EG15DBVR is a fixed-threshold variant calibrated exclusively for 1.5V rails (1.40V trip point). To monitor other voltages, select alternate part numbers like TPS3808EG33DBVR (3.3V) or the adjustable TPS3808EG01DBVR with external resistor divider, as specified in Table 4 of the SNVSCE0B datasheet.
What is the maximum supply voltage the TPS3808EG15DBVR can tolerate on its VDD pin?
The TPS3808EG15DBVR supports VDD from 1.7V to 6V per Absolute Maximum Ratings (Section 6.1) and Recommended Operating Conditions (Section 6.3). Exceeding 6V risks permanent damage; operation above 6V is not supported even momentarily.
Does the TPS3808EG15DBVR require an external pull-up resistor on the RESET pin?
Yes-the TPS3808EG15DBVR features an open-drain RESET output and requires an external pull-up resistor between RESET and the target supply (e.g., 3.3V or 5V), sized 10kΩ to 1MΩ per Section 5 Pin Functions and Figure 9-1. Without it, RESET cannot achieve a valid logic-high state.
TPS3808EG15DBVR 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:
- 1.4V
- 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
TPS3808EG15DBVR FAQ
1.How can I place an order for TPS3808EG15DBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3808EG15DBVR 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 TPS3808EG15DBVR reliable?
The price and inventory of TPS3808EG15DBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3808EG15DBVR is usually 5 days.
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Once your TPS3808EG15DBVR 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 TPS3808EG15DBVR?
For technical support, including TPS3808EG15DBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3808EG15DBVR requirements.
6.How does Aetrix verify that TPS3808EG15DBVR is sourced from the original manufacturer or authorized distributors?
All TPS3808EG15DBVR 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 TPS3808EG15DBVR meets industry standards.
7.What is the process for return or replacement of TPS3808EG15DBVR?
All TPS3808EG15DBVR units undergo pre-shipment inspection (PSI). If there is an issue with TPS3808EG15DBVR, 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 TPS3808EG15DBVR part is unused and in its original packaging.
Return procedure for TPS3808EG15DBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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