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Texas Instruments TPS3619-50DGKR
- Part No.:
- TPS3619-50DGKR
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TPS3619-50DGKR.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,284
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Product details
Overview
TPS3619-50DGKR from Texas Instruments is a backup-battery supervisor IC for CMOS RAM retention, featuring 5.0 V nominal supply voltage monitoring, 4.55 V reset threshold (±30 mV), 40 µA max VDD supply current, and integrated switchover control between main supply (VDD) and backup battery (VBAT). It operates in portable battery-powered equipment requiring reliable power-fail detection and seamless RAM backup.
For engineers reviewing the TPS3619-50DGKR datasheet, TPS3619-50DGKR pinout, TPS3619-50DGKR application, or TPS3619-50DGKR equivalent, this device delivers precision voltage supervision with battery-freshness seal (TPS3619 family), 100-ms fixed reset delay, and dual-path output switching (VDD/VBAT to VOUT) in an 8-pin VSSOP package.
Technical Context
The TPS3619-50DGKR implements a dual-supply supervisory architecture with independent VDD and VBAT monitoring paths. Its internal 1.15 V reference enables PFI-based power-fail detection, while the reset generator uses a fixed 100-ms delay after VDD exceeds the 4.55 V threshold.
Switchover logic ensures VOUT connects to VBAT only when VDD falls below VIT and VBAT > VDD, with rDS(on) ≤ 1 Ω (VDD→VOUT) and ≤15 Ω (VBAT→VOUT). The battery freshness seal-enabled only in TPS3619 variants-disconnects VBAT until first power-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Supply Voltage | 5.0 V - Sets reset threshold at 4.55 V (typical), compatible with standard 5-V system rails. |
| Reset Threshold Voltage (VIT) | 4.46–4.64 V - Precision window ensures reliable brownout detection without false resets. |
| VDD Supply Current | 40 µA (max) - Enables long-term operation in low-power battery-backed systems. |
| VBAT Supply Current | 100 nA (max) - Minimizes backup battery drain during extended storage or standby. |
| Reset Delay Time | 100 ms (fixed) - Guarantees sufficient processor initialization time before release of RESET signal. |
| Operating Temperature Range | –40°C to +85°C - Validated for industrial and automotive ambient conditions. |
| VDD-to-VOUT rDS(on) | ≤1 Ω - Limits voltage drop under 200 mA load, preserving system rail integrity. |
Pinout & Package
TPS3619-50DGKR is housed in an 8-pin VSSOP (DGK) package measuring 3.05 mm × 4.98 mm, with 0.65 mm lead pitch and 1.1 mm max height. Exposed thermal pad enhances thermal performance in high-density layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT (Pin 1) | Power output | Switched supply rail delivering power from either VDD or VBAT based on switchover logic. |
| VDD (Pin 2) | Main supply input | Primary system voltage source; monitored for reset assertion and used as VOUT source when active. |
| GND (Pin 3) | Ground reference | Common return path for all internal circuits and external decoupling capacitors. |
| PFI (Pin 4) | Power-fail comparator input | Monitors auxiliary voltage (e.g., via resistor divider); triggers PFO low when input drops below 1.15 V. |
| PFO (Pin 5) | Power-fail comparator output | Active-low open-drain signal indicating detected power failure or low-battery condition. |
| MR (Pin 6) | Manual reset input | Active-low asynchronous reset override; pulls RESET low regardless of VDD status when asserted. |
| RESET (Pin 7) | Reset output | Active-low open-drain output synchronized to VDD threshold crossing and 100-ms timer. |
| VBAT (Pin 8) | Backup battery input | Connects lithium or coin-cell backup; isolated by freshness seal until first power-up sequence. |
Key Features
| Feature | Design Value |
|---|---|
| Battery freshness seal | Prevents VBAT discharge during storage by isolating battery until initial VDD application and RESET edge. |
| Backup-battery switchover | Automatic VOUT sourcing from VBAT when VDD falls below 4.55 V, supporting RAM retention without interruption. |
| Power-fail monitoring | Dedicated PFI/PFO path with 1.15 V internal reference enables flexible supervision of non-5-V rails (e.g., 3.3 V, 2.5 V). |
| Low quiescent current | 40 µA VDD current and 100 nA VBAT current extend battery life in always-on backup applications. |
| Fixed 100-ms reset delay | Guarantees deterministic reset timing across temperature and voltage, eliminating need for external RC timing components. |
Applications
| Portable Battery-Powered Equipment | Fax Machines |
|---|---|
Use Scenario: Handheld data loggers retaining sensor history during intermittent charging cycles. IC Role / Device Role / Timing Role: Supervises main Li-ion supply and switches to backup coin cell during charge disconnect to preserve SRAM contents. Use Value: Enables >10-year data retention with <100 nA VBAT leakage, avoiding volatile memory loss during field deployment. |
Use Scenario: Standby-mode fax units maintaining dialing history and configuration across AC power outages. IC Role / Device Role / Timing Role: Monitors 5-V rail and asserts RESET on brownout while enabling VBAT→VOUT switchover for RAM hold. Use Value: Eliminates need for supercapacitor backup; achieves instant resume after power restoration using 5-V threshold accuracy ±30 mV. |
| Computer Equipment | Automotive Systems |
Use Scenario: Industrial PCs storing BIOS settings and calibration data in battery-backed CMOS RAM. IC Role / Device Role / Timing Role: Provides 100-ms reset pulse synchronized to 5-V rail rise/fall, ensuring clean boot after cold start. Use Value: Prevents corrupted firmware writes during unstable power transitions, validated over –40°C to +85°C range. |
Use Scenario: Telematics control units retaining GPS last-known position and event logs during ignition-off periods. IC Role / Device Role / Timing Role: Supervises 5-V domain and activates VBAT path when vehicle battery drops below 4.55 V during cranking. Use Value: Maintains critical safety data with <1 Ω VDD→VOUT resistance, limiting voltage sag to <200 mV at 200 mA load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar backup-battery supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3620-50DGKR | Includes PFI hysteresis (12 mV) and enhanced ESD protection; identical pinout and electrical specs. | Preferred for designs requiring tighter noise immunity on power-fail detection lines. | Select when PFI signal integrity is compromised by board-level noise or long trace routing. |
| MAX704CSA+ | 3.0 V reset threshold; 200-ms reset timeout; no battery freshness seal; SO-8 package. | Not suitable for 5-V systems without external level-shifting; lacks VBAT switchover optimization. | Consider only for legacy 3.3-V/3.0-V designs where TI part obsolescence risk outweighs functional mismatch. |
Compared with TPS3619-50DGKR, TPS3620-50DGKR offers improved PFI noise rejection without layout changes, while MAX704CSA+ requires redesign for 5-V compatibility and provides no battery-freshness functionality-making TPS3619-50DGKR optimal for new 5-V RAM-retention systems demanding ultra-low VBAT leakage.
Availability
TPS3619-50DGKR is available at Aetrix Electronics and suitable for portable battery-powered equipment, fax machines, computer equipment, and automotive systems requiring stable component supply with guaranteed long-term manufacturability.
Supply support for TPS3619-50DGKR 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 specializing in analog, embedded processing, and power management technologies, with decades of expertise in high-reliability supervisory ICs.
The TPS3619 family was designed specifically for battery-backed RAM retention in space-constrained portable and industrial systems, emphasizing ultra-low VBAT current and factory-sealed battery preservation.
FAQ
What is the reset threshold voltage tolerance for TPS3619-50DGKR?
The TPS3619-50DGKR has a specified reset threshold (VIT) of 4.46 V (min) to 4.64 V (max) at TA = –40°C to +85°C, yielding ±30 mV tolerance around the typical 4.55 V value. This tight window ensures robust brownout detection without premature or delayed reset assertion in 5-V systems. The TPS3619-50DGKR datasheet confirms this range under Electrical Characteristics.
Does TPS3619-50DGKR support automatic switchover to backup battery during main supply failure?
Yes, the TPS3619-50DGKR automatically switches VOUT from VDD to VBAT when VDD falls below the 4.55 V threshold and VBAT exceeds VDD. This action preserves RAM contents without software intervention. The TPS3619-50DGKR implements this using internal PMOS switches with ≤15 Ω VBAT→VOUT resistance, verified in the Electrical Characteristics table.
How does the battery freshness seal function in TPS3619-50DGKR?
The battery freshness seal in TPS3619-50DGKR disconnects VBAT from internal circuitry until first power-up, preventing shelf-life discharge. It is enabled by applying VDD > VIT for 5–35 ms while grounding PFO and connecting PFI to VDD. The seal is removed automatically by the rising edge of RESET. This feature is exclusive to the TPS3619 family, including TPS3619-50DGKR.
Can TPS3619-50DGKR monitor voltages other than the main 5-V supply?
Yes, the TPS3619-50DGKR includes a dedicated PFI input referenced to an internal 1.15 V comparator, allowing supervision of auxiliary rails (e.g., 3.3 V, 2.5 V) via external resistor dividers. The PFO output asserts low when PFI drops below 1.15 V, with 12 mV hysteresis. This capability is documented in the DETAILED DESCRIPTION section of the TPS3619-50DGKR datasheet.
What package type and dimensions does TPS3619-50DGKR use?
TPS3619-50DGKR uses an 8-pin VSSOP (DGK) package measuring 3.05 mm × 4.98 mm with 0.65 mm lead pitch and 1.1 mm maximum height. The exposed thermal pad improves heat dissipation in compact layouts. Package details-including land pattern and stencil recommendations-are provided in the PACKAGE OUTLINE and EXAMPLE BOARD LAYOUT sections of the TPS3619-50DGKR datasheet.
TPS3619-50DGKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.55V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 60ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
TPS3619-50DGKR FAQ
1.How can I place an order for TPS3619-50DGKR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3619-50DGKR 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 TPS3619-50DGKR reliable?
The price and inventory of TPS3619-50DGKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3619-50DGKR is usually 5 days.
3.What payment methods are accepted for TPS3619-50DGKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3619-50DGKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS3619-50DGKR?
TPS3619-50DGKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3619-50DGKR 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 TPS3619-50DGKR?
For technical support, including TPS3619-50DGKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3619-50DGKR requirements.
6.How does Aetrix verify that TPS3619-50DGKR is sourced from the original manufacturer or authorized distributors?
All TPS3619-50DGKR 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 TPS3619-50DGKR meets industry standards.
7.What is the process for return or replacement of TPS3619-50DGKR?
All TPS3619-50DGKR units undergo pre-shipment inspection (PSI). If there is an issue with TPS3619-50DGKR, 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 TPS3619-50DGKR part is unused and in its original packaging.
Return procedure for TPS3619-50DGKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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