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Texas Instruments TPS3840PL25DBVRQ1
- Part No.:
- TPS3840PL25DBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS3840PL25DBVRQ1.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TPS3840PL25DBVRQ1 from Texas Instruments is an automotive-grade nano-power voltage supervisor with push-pull active-low reset output, 2.5 V fixed threshold (±1.5% max), 350 nA typical quiescent current, and programmable capacitor-based reset delay up to 6.2 s - used for reliable power-on reset and brownout detection in automotive infotainment and ADAS domain controllers.
For engineers reviewing the TPS3840PL25DBVRQ1 datasheet, TPS3840PL25DBVRQ1 pinout, TPS3840PL25DBVRQ1 application, or TPS3840PL25DBVRQ1 equivalent, this page delivers verified electrical specs, validated SOT-23-5 pin functions, AEC-Q100 Grade 1 operating context (–40°C to +125°C), and direct alternative part comparisons for automotive system-level design and qualification.
Technical Context
The TPS3840PL25DBVRQ1 implements a precision bandgap-referenced comparator with built-in hysteresis (100 mV typ. for 2.5 V threshold) and glitch-immune VDD monitoring logic. Its internal state machine asserts RESET low when VDD drops below 2.5 V or MR is pulled low, and holds assertion for user-programmable tD after VDD rises above 2.6 V and MR releases.
It uses a dedicated CT pin with 500 kΩ internal resistance to interface with external timing capacitors (0–10 µF), enabling precise reset hold times from 50 µs (CT floating) to 6.2 s (10 µF). The push-pull output drives RESET directly without external pull-up, supporting 2 mA sink at VOL ≤200 mV (VDD = 1.5–5 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Threshold Voltage (VIT−) | 2.5 V ±1.5% max over –40°C to +125°C - ensures accurate brownout detection across full automotive temperature range |
| Quiescent Current (IDD) | 350 nA typ., 700 nA max - enables always-on monitoring in battery-backed systems without measurable drain |
| Reset Output Type | Push-pull, active-low - eliminates need for external pull-up resistor and reduces BOM count and layout area |
| Startup Delay (tSTRT) | ≤350 µs max - guarantees fast, deterministic reset release after power stabilization |
| Programmable Reset Delay (tD) | 50 µs (CT open) to 6.2 s (CT = 10 µF) - supports flexible system boot sequencing and firmware initialization windows |
| Hysteresis (VHYS) | 100 mV typical (for VIT− ≤3.0 V) - prevents chatter during slow-rising/falling supply transitions |
| Manual Reset Input (MR) | Logic-low trigger (VMR_L ≤600 mV), internally pulled up to VDD - allows clean hardware-initiated reset without external components |
Pinout & Package
SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm body, 0.95 mm max height, gull-wing leads, RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push-pull output | Drives low (≤200 mV @ 2 mA sink) to assert reset; high (≥0.8×VDD @ 2 mA source) to release - no external pull-up required |
| 2 - VDD | Supply and monitored input | Monitors own supply rail from 1.5 V to 10 V; powers internal bandgap, comparator, and logic - requires local 0.1–1 µF bypass |
| 3 - GND | Reference ground | Return path for VDD, RESET, MR, and CT; must be low-impedance connection to system ground plane |
| 4 - MR | Active-low manual reset input | Pulled up internally to VDD (100 kΩ); asserting low (≤600 mV) forces immediate RESET assertion - float for disable |
| 5 - CT | Capacitor time-delay control | Connects to external timing capacitor (0–10 µF) to set reset hold time; floating = minimum 50 µs delay |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation - meets automotive cockpit and ECU thermal requirements |
| Nano-quiescent current | 350 nA typical supply draw - extends battery life in always-on telematics and remote keyless entry modules |
| Fixed 2.5 V threshold with 1% typical accuracy | Enables precise monitoring of 2.5 V LDO outputs or core rails without calibration - reduces system validation effort |
| Glitch-immune VDD sensing | Rejects transients <10 µs at 5% overdrive - prevents false resets during load-dump or ignition-switching events |
| Integrated MR pull-up | 100 kΩ internal resistor - eliminates discrete pull-up and associated board space, cost, and solder joint risk |
| Push-pull RESET output | Direct-drive capability - simplifies interface to microcontroller reset inputs and avoids weak-pull issues in noisy environments |
Applications
| Automotive Head Unit Power Sequencing | ADAS Domain Controller Brownout Protection |
|---|---|
Use Scenario: Monitors 2.5 V VCORE rail in infotainment head unit during cold-cranking and load-dump conditions. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low RESET to SoC until VCORE stabilizes above 2.5 V with 100 mV hysteresis. Use Value: Prevents firmware corruption by holding reset for ≥50 µs after VDD crosses 2.6 V - guaranteed by push-pull drive and 350 µA min. sink capability. |
Use Scenario: Guards 2.5 V I/O supply in radar/Ethernet domain controller exposed to wide automotive voltage transients. IC Role / Device Role / Timing Role: Detects brownout on 2.5 V rail and asserts RESET low for programmable duration (e.g., 100 ms via 100 nF CT cap) to allow safe MCU shutdown. Use Value: 6.2 s max delay supports extended safety diagnostics; 10 µs glitch immunity rejects ISO 7637-2 pulse 1/2a noise without false triggers. |
| Telematics Control Unit (TCU) Watchdog Coordination | Automotive Display Subsystem Reset Management |
Use Scenario: Provides primary power-on reset signal synchronized with cellular modem boot sequence in emergency call (eCall) module. IC Role / Device Role / Timing Role: Generates clean, capacitor-programmed reset pulse (e.g., 200 ms) after 2.5 V rail reaches regulation, coordinated with baseband processor wake-up timing. Use Value: Eliminates need for external RC network - CT pin integration reduces component count and improves timing repeatability across temperature. |
Use Scenario: Supervises 2.5 V backlight driver and display interface power in digital instrument cluster with strict startup timing. IC Role / Device Role / Timing Role: Asserts RESET low until 2.5 V rail exceeds 2.5 V and remains stable for ≥50 µs (CT floating), then releases to enable display controller initialization. Use Value: 350 nA quiescent current avoids parasitic drain on backup battery during vehicle sleep mode - critical for >10-year battery life targets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3840DL25DBVRQ1 | Open-drain active-low output; requires external pull-up resistor; identical threshold, accuracy, and timing specs | Suitable where shared reset bus or wired-OR logic is needed; higher board area and BOM cost due to pull-up | Select when interfacing to multiple devices on common reset line or when level-shifting reset signals across voltage domains |
| TLV809E25DBZR | Fixed 2.5 V threshold, SOT-23-3, no MR or CT pins; 1.8 µA IQ; 200 ms fixed delay; no programmability | Limited to simple POR only; no manual reset or adjustable delay - insufficient for complex boot sequencing | Choose only for cost-sensitive, space-constrained applications requiring basic 2.5 V reset without flexibility or automotive qualification |
Compared with TPS3840PL25DBVRQ1, the DL25 variant adds bus-sharing capability at the cost of external component overhead, while TLV809E25 offers lower price but sacrifices AEC-Q100 compliance, nano-power operation, and delay programmability essential for modern automotive ECUs.
Availability
TPS3840PL25DBVRQ1 is available at Aetrix Electronics and suitable for automotive head units, ADAS domain controllers, and telematics control units requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for TPS3840PL25DBVRQ1 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 with deep automotive system expertise and broad manufacturing scale.
The TPS3840-Q1 product line was designed specifically for automotive power supervision - combining ultra-low IQ, AEC-Q100 qualification, and programmable timing to replace discrete RC-reset circuits in next-generation E/E architectures.
FAQ
What is the exact threshold voltage and tolerance of the TPS3840PL25DBVRQ1?
The TPS3840PL25DBVRQ1 has a factory-trimmed negative-going input threshold (VIT−) of 2.5 V with ±1.5% maximum deviation across –40°C to +125°C ambient temperature. Typical accuracy is ±1%, and hysteresis is 100 mV (typical), resulting in a VIT+ of 2.6 V. This is confirmed in Section 7.5 of the official TI datasheet SNVSBA1B.
Does the TPS3840PL25DBVRQ1 require an external pull-up resistor on the RESET pin?
No, the TPS3840PL25DBVRQ1 features a push-pull active-low RESET output and does not require an external pull-up resistor. It can sink up to 2 mA while maintaining VOL ≤200 mV (at VDD = 1.5–5 V), enabling direct connection to microcontroller reset inputs without additional components.
How is the reset delay time programmed on the TPS3840PL25DBVRQ1?
The reset delay time (tD) on the TPS3840PL25DBVRQ1 is programmed by connecting an external capacitor between the CT pin (Pin 5) and GND. With CT floating, tD = 50 µs (included in startup delay). With CT = 10 µF, tD ≈ 6.2 s. The relationship follows tD = −ln(0.29) × RCT × CCT_EXT + 50 µs, where RCT = 500 kΩ (typical).
Is the TPS3840PL25DBVRQ1 qualified for automotive applications?
Yes, the TPS3840PL25DBVRQ1 is AEC-Q100 qualified for Grade 1 (–40°C to +125°C ambient), with HBM ESD rating of ±2000 V and CDM rating of ±750 V. It is explicitly designated as "TPS3840-Q1" in TI's documentation and listed in the Automotive product folder with full PPAP support documentation.
What is the quiescent current consumption of the TPS3840PL25DBVRQ1 across its operating range?
The TPS3840PL25DBVRQ1 draws 350 nA typical and 700 nA maximum quiescent current (IDD) over the full 1.5 V to 10 V VDD range and –40°C to +125°C temperature range. This nano-power performance is measured with CT and MR open, RESET unloaded, and VDD > VIT+, per Section 7.5 of the datasheet.
TPS3840PL25DBVRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.5V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 619ms Typical
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TPS3840PL25DBVRQ1 FAQ
1.How can I place an order for TPS3840PL25DBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3840PL25DBVRQ1 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 TPS3840PL25DBVRQ1 reliable?
The price and inventory of TPS3840PL25DBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3840PL25DBVRQ1 is usually 5 days.
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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 TPS3840PL25DBVRQ1?
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6.How does Aetrix verify that TPS3840PL25DBVRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS3840PL25DBVRQ1 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 TPS3840PL25DBVRQ1 meets industry standards.
7.What is the process for return or replacement of TPS3840PL25DBVRQ1?
All TPS3840PL25DBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3840PL25DBVRQ1, 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 TPS3840PL25DBVRQ1 part is unused and in its original packaging.
Return procedure for TPS3840PL25DBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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