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Texas Instruments TPS3839G25DBZR
- Part No.:
- TPS3839G25DBZR
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TPS3839G25DBZR.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:9,179
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Product details
Overview
TPS3839G25DBZR from Texas Instruments is an ultralow-power voltage supervisor IC designed for single-rail supply monitoring in battery-critical systems. It features a factory-trimmed 2.325 V reset threshold, 150 nA typical supply current at 25°C, push-pull RESET output, and valid operation down to 0.6 V VDD - enabling reliable power-on reset in glucose monitors and wearables.
For engineers reviewing the TPS3839G25DBZR datasheet, TPS3839G25DBZR pinout, TPS3839G25DBZR application, or TPS3839G25DBZR equivalent, key selection criteria include its 2.325 V threshold accuracy (±1% at 25°C), 200 ms reset delay, SOT-23-3 package compatibility, and transient rejection capability for fast VDD dips.
Technical Context
The TPS3839G25DBZR implements a precision comparator-based supervision architecture with built-in hysteresis (23 mV) to prevent chatter during threshold crossing. Its sampling scheme draws only ~15 µA for 200 µs per cycle, sustaining average current at 150 nA while maintaining accurate threshold detection across –40°C to +85°C.
Unlike the TPS3831 family, the TPS3839G25DBZR omits the manual reset (MR) input and uses a 3-pin SOT-23 (DBZ) package - simplifying layout and reducing BOM count in space-constrained portable designs where external reset assertion is unnecessary.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 2.325 V (factory-trimmed, ±1% accuracy at 25°C) - ensures precise brownout detection for 2.5 V nominal rails |
| Supply Current | 150 nA typical at 25°C - enables multi-year battery life in coin-cell-powered wearables |
| Operating Voltage Range | 0.9 V to 6.5 V - supports single alkaline, Li-ion, and multi-cell configurations |
| Reset Delay Time | 200 ms typical - provides sufficient hold-off for microcontroller initialization after power recovery |
| Output Type | Active-low push-pull RESET - eliminates need for external pull-up resistor and drives bidirectional MCU reset pins directly |
| Valid Reset Down to | 0.6 V VDD - guarantees deterministic reset assertion even during deep discharge or cold-start conditions |
| Hysteresis Voltage | 23 mV - prevents oscillation during slow-rising or noisy supply ramps |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92 mm × 2.37 mm, surface-mount, lead-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Accepts 0.9–6.5 V; powers internal circuitry and defines threshold reference scale |
| GND | Ground reference | Return path for supply current and RESET output sink; must be low-impedance for stable threshold accuracy |
| RESET | Active-low reset output | Push-pull driver capable of sinking 2 mA; asserts low when VDD < 2.325 V and holds for 200 ms post-recovery |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow quiescent current | 150 nA typical - reduces system standby power by >90% vs. legacy supervisors, critical for ISO 13485 medical devices |
| Factory-trimmed threshold | 2.325 V ±1% - eliminates external resistor divider, saves PCB area, and improves long-term stability over temperature |
| VDD transient rejection | Rejects sub-20 µs transients ≥5% below VIT− - prevents false resets from switching noise or load dumps |
| Wide temperature range | –40°C to +85°C - qualified for industrial and automotive cabin applications without derating |
| Low-voltage validity | Guaranteed RESET assertion down to 0.6 V VDD - ensures fail-safe behavior during battery depletion or cold-temperature startup |
Applications
| Glucose Monitoring Systems | Portable ECG Devices |
|---|---|
Use Scenario: Continuous glucose sensing in disposable patch-style meters powered by CR2032 coin cells. IC Role / Device Role / Timing Role: Primary power-on reset supervisor ensuring MCU boot integrity after battery insertion or low-voltage recovery. Use Value: 150 nA current draw extends usable battery life beyond 12 months; 2.325 V threshold aligns precisely with end-of-discharge voltage of alkaline cells. |
Use Scenario: Battery-operated handheld ECG units requiring FDA-grade reliability and low standby drain. IC Role / Device Role / Timing Role: Single-rail VDD monitor for analog front-end and ARM Cortex-M4 host processor. Use Value: Push-pull RESET eliminates external pull-up, reducing component count; 200 ms delay meets IEC 60601-1 power-up timing requirements. |
| Smart Wearable Trackers | Industrial Wireless Sensors |
Use Scenario: Ultra-thin fitness bands using single-cell LiPo batteries with tight voltage margins. IC Role / Device Role / Timing Role: Brownout detector preventing corrupted flash writes or sensor data loss during voltage sag. Use Value: 23 mV hysteresis avoids reset toggling during RF transmission current spikes; SOT-23-3 footprint fits 2.5 mm² board area constraints. |
Use Scenario: LoRaWAN-enabled environmental sensors deployed in remote locations with primary AA/AAA battery packs. IC Role / Device Role / Timing Role: System-level supply validator triggering controlled shutdown before EEPROM corruption occurs. Use Value: Valid operation down to 0.6 V ensures last-gasp telemetry transmission even at –20°C; 0.9–6.5 V range supports both alkaline and NiMH chemistries. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3831G25DQNR | Same 2.325 V threshold and 150 nA current, but in 4-pin X2SON (1.0 mm × 1.0 mm); includes MR pin and NC terminal | Requires manual reset capability or PCB real estate for 4-pin layout; not pin-compatible due to extra MR pin | Select if system requires externally triggered reset or space allows smaller X2SON footprint |
| MAX6375XR23+T | 2.32 V threshold, 1.6 µA supply current, SOT-23-3, 200 ms delay - higher current, same package | Higher quiescent draw limits use in >5-year battery applications; identical pinout enables drop-in replacement on existing footprints | Select only when 150 nA is not required and MAXIM sourcing is preferred; verify thermal performance under 85°C ambient |
Compared with TPS3839G25DBZR, the TPS3831G25DQNR adds manual reset functionality at the cost of larger pin count and no direct pin compatibility, while the MAX6375XR23+T offers identical SOT-23-3 fit but consumes >10× more current - making TPS3839G25DBZR optimal for ultra-low-power, reset-only use cases.
Availability
TPS3839G25DBZR is available at Aetrix Electronics and suitable for glucose monitors, wearable health trackers, and industrial wireless sensors requiring stable component supply, long-life battery operation, and precise 2.325 V brownout detection.
Supply support for TPS3839G25DBZR 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions across industrial, automotive, and personal electronics markets.
The TPS383x family was engineered specifically for ultralow-power supply monitoring in battery-constrained applications - prioritizing nanoamp quiescent current, wide input voltage range, and factory-trimmed accuracy without external components.
FAQ
What is the exact reset threshold voltage of the TPS3839G25DBZR?
The TPS3839G25DBZR has a factory-trimmed negative-going threshold voltage (VIT–) of 2.325 V, with ±1% accuracy at 25°C and guaranteed performance across –40°C to +85°C. This value is laser-trimmed during production and does not require external calibration or resistor networks.
Does the TPS3839G25DBZR support manual reset functionality?
No, the TPS3839G25DBZR does not include a manual reset (MR) input. It is a 3-pin device (VDD, GND, RESET) with no MR pin. For manual reset capability, engineers should select the TPS3831G25DQNR variant, which provides MR in a 4-pin X2SON package.
What is the minimum supply voltage at which TPS3839G25DBZR guarantees valid RESET output?
The TPS3839G25DBZR guarantees valid RESET assertion down to 0.6 V VDD, as specified by the V(POR) parameter. Below this voltage, the RESET output state is undefined and must not be relied upon for system safety or sequencing.
Can the TPS3839G25DBZR drive a microcontroller's bidirectional reset pin directly?
Yes, the TPS3839G25DBZR's push-pull RESET output can drive most bidirectional reset pins directly. However, TI recommends adding a 100 Ω series resistor between RESET and the MCU pin to limit current if both devices attempt to drive the line simultaneously during power transitions.
How does the TPS3839G25DBZR reject fast supply transients?
The TPS3839G25DBZR rejects transients based on amplitude and duration: for example, a 5% dip below VIT– must last longer than ~20 µs to trigger reset. This behavior is inherent to its internal sampling architecture and requires no external components - verified per Figure 13 in SBVS193D.
TPS3839G25DBZR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.325V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 120ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
TPS3839G25DBZR FAQ
1.How can I place an order for TPS3839G25DBZR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3839G25DBZR 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 TPS3839G25DBZR reliable?
The price and inventory of TPS3839G25DBZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3839G25DBZR is usually 5 days.
3.What payment methods are accepted for TPS3839G25DBZR?
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4.How is shipping managed for TPS3839G25DBZR?
TPS3839G25DBZR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3839G25DBZR 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 TPS3839G25DBZR?
For technical support, including TPS3839G25DBZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3839G25DBZR requirements.
6.How does Aetrix verify that TPS3839G25DBZR is sourced from the original manufacturer or authorized distributors?
All TPS3839G25DBZR 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 TPS3839G25DBZR meets industry standards.
7.What is the process for return or replacement of TPS3839G25DBZR?
All TPS3839G25DBZR units undergo pre-shipment inspection (PSI). If there is an issue with TPS3839G25DBZR, 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 TPS3839G25DBZR part is unused and in its original packaging.
Return procedure for TPS3839G25DBZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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