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Texas Instruments TPS3899PL42DSER
- Part No.:
- TPS3899PL42DSER
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 6-WFDFN
- Datasheet:
-
TPS3899PL42DSER.pdf
- Description:
- NANOPOWER SUPERVISOR WITH PROGRA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TPS3899PL42DSER from Texas Instruments is a nano-power, precision voltage supervisor with push-button monitoring capability, ±0.5% threshold accuracy, 125nA typical quiescent current, and programmable sense/reset delay via external capacitors on CTS/CTR pins; used in battery-powered industrial and computing systems for reliable power-on reset and undervoltage detection.
For engineers reviewing the TPS3899PL42DSER datasheet, TPS3899PL42DSER pinout, TPS3899PL42DSER application, or TPS3899PL42DSER equivalent, key selection considerations include its 0.8V–5.4V fixed threshold (4.2V variant), push-pull active-low RESET output, 1.5mm × 1.5mm WSON-6 package, –40°C to +125°C operation, and dual-delay programmability for glitch-immune rail and button monitoring.
Technical Context
The TPS3899PL42DSER implements a precision comparator with built-in 5% hysteresis and independent capacitor-programmable timing paths: CTS sets sense delay (assertion) from 50µs to ~6.5s, while CTR sets reset delay (deassertion) over the same range. Its SENSE pin operates independently of VDD (0–6V input range), enabling rail redundancy and external resistor-divider configuration.
It supports three output topologies - DL (open-drain low), PL (push-pull low), and PH (push-pull high) - with the PL variant delivering active-low logic compatible with standard microcontroller reset inputs without external pull-up. The device asserts RESET when SENSE falls below 4.2V (VIT−) and holds it until SENSE rises above 4.41V (VIT− + VHYS) plus CTR delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIT− Threshold | 4.2 V fixed (±0.5% typical accuracy); enables precise monitoring of 4.2V rails such as Li-ion battery full-charge voltage or 4.3V LDO outputs. |
| Quiescent Current | 125 nA typical; allows multi-year operation from coin cells in always-on monitoring applications like smart meters or IoT sensors. |
| Supply Range | 0.85 V to 6 V (VDD); supports direct connection to low-voltage MCUs (e.g., 0.9V core) while monitoring higher rails via SENSE. |
| Hysteresis | 5% typical (210 mV at 4.2V); prevents chatter during slow-rising/falling rails or noisy environments without external components. |
| Delay Programmability | CTS/CTR pins accept 0–10 µF capacitors; provides independent, repeatable assertion (sense) and deassertion (reset) delays from 50 µs to 6.5 s. |
| Operating Temp | –40°C to +125°C; qualified for under-hood automotive modules, industrial PLCs, and data center power sequencers. |
| Package | WSON-6 (1.5mm × 1.5mm, 0.5mm pitch); enables ultra-compact placement near critical rails with minimal PCB area and thermal mass. |
Pinout & Package
TPS3899PL42DSER uses a 6-pin WSON package (1.5mm × 1.5mm, 0.5mm pitch) with wettable flanks for automated optical inspection. Pin 1 is marked by a dot; no exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CTR | Reset delay timing input | Connects to ground-referenced capacitor to set RESET deassertion delay; internal 500kΩ pull-up charges capacitor to 0.73×VDD threshold. |
| 2 - CTS | Sense delay timing input | Connects to ground-referenced capacitor to set RESET assertion delay; internal 500kΩ pull-up charges capacitor to 0.73×VDD threshold; also debounces push-button inputs. |
| 3 - GND | Ground reference | Analog and digital ground common node; requires low-inductance connection to system ground plane for noise immunity. |
| 4 - VDD | Power supply input | Supplies internal circuitry; must be decoupled with 0.1µF ceramic capacitor placed within 2mm of pin; valid from 0.85V to 6V. |
| 5 - SENSE | Monitored voltage input | High-impedance (≤0.1µA leakage) input; accepts 0–6V signals; monitors VDD or external rail; supports resistor divider for thresholds outside 0.8–5.4V range. |
| 6 - RESET | Push-pull active-low output | Drives low (≤300mV @ 2mA) or high (≥0.8×VDD) directly; no external pull-up required; compatible with 1.2V–6V logic interfaces. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable dual-delay architecture | Independent CTS (sense) and CTR (reset) timing control eliminates need for external RC networks or timers in power sequencing designs. |
| Fixed 4.2V threshold with ±0.5% accuracy | Matches Li-ion battery full-charge voltage and 4.3V LDO outputs without trimming; reduces BOM count and calibration overhead. |
| 125nA nano-power operation | Enables permanent installation in energy-harvesting or battery-backed systems where self-discharge dominates lifetime budget. |
| SENSE/VDD separation | Allows monitoring of 5V or 12V rails using 1.8V VDD supply - critical for isolated domains and mixed-voltage systems. |
| Glitch immunity on SENSE | Rejects transients <10µs wide at 5% overdrive; combined with optional 10–100nF bypass capacitor, ensures robust push-button debounce. |
Applications
| Electricity Meters | Industrial Motor Drives |
|---|---|
|
Use Scenario: Monitors backup supercapacitor voltage during main AC failure to trigger controlled shutdown before brownout. IC Role / Device Role / Timing Role: Voltage supervisor asserting RESET to MCU when supercap drops below 4.2V; CTS delay filters line transients, CTR delay ensures clean restart after recovery. Use Value: Prevents corrupted flash writes and EEPROM corruption during grid instability; eliminates need for discrete RC reset circuits. |
Use Scenario: Validates gate driver supply rail integrity before enabling IGBTs in servo amplifier power stage. IC Role / Device Role / Timing Role: Supervises 4.2V isolated auxiliary supply; RESET held low until rail stabilizes >4.41V (4.2V + 5% hysteresis) and remains asserted if rail dips during operation. Use Value: Blocks unsafe PWM activation during undervoltage; avoids shoot-through and device destruction without software intervention. |
| Notebook Power Sequencing | Automotive Body Control Module |
|
Use Scenario: Coordinates startup of CPU, GPU, and memory rails by generating staggered reset signals based on individual rail readiness. IC Role / Device Role / Timing Role: Uses SENSE to monitor each rail; CTR delay tuned per rail to enforce timing margins; RESET drives dedicated reset input on each subsystem. Use Value: Replaces multiple discrete supervisors with single compact IC; reduces layout complexity and improves timing repeatability across temperature. |
Use Scenario: Detects momentary loss of 12V battery voltage during cold-cranking and initiates graceful firmware save before power collapse. IC Role / Device Role / Timing Role: SENSE tied to battery rail via resistor divider; CTS delay ignores cranking spikes (<100ms); CTR delay holds RESET until post-crank stabilization. Use Value: Meets ISO 16750-2 pulse 4 requirements; prevents ECU lockup and preserves diagnostic trouble codes across engine start cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3899DL42DSER | Same 4.2V threshold and timing features, but open-drain active-low RESET output requiring external pull-up resistor. | Requires additional 100kΩ pull-up to target logic rail; suitable when level-shifting or wired-OR reset busing is needed. | Select DL variant only when interfacing with mixed-voltage systems or implementing shared reset buses. |
| TPS3897PL42DSER | Lacks CTS pin and push-button debounce function; fixed 50µs sense delay; identical 4.2V threshold, PL output, and 125nA IQ. | Cannot monitor push-button inputs or reject long-duration transients; simpler timing behavior but less flexible for human-interface use cases. | Choose TPS3897PL42DSER only when push-button monitoring is unnecessary and minimal BOM count is prioritized over configurability. |
Compared with TPS3899PL42DSER, the DL variant adds external component overhead but enables bus sharing, while the TPS3897PL42DSER sacrifices programmable sense delay for reduced pin count and cost - making the TPS3899PL42DSER optimal where both rail and button supervision with glitch immunity are required.
Availability
TPS3899PL42DSER is available at Aetrix Electronics and suitable for electricity meters, industrial motor drives, notebook power sequencing, and automotive body control modules requiring stable component supply across extended temperature and long product lifecycles.
Supply support for TPS3899PL42DSER 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 TPS3899 product line delivers nano-power, precision voltage supervisors with programmable timing for battery-critical and safety-aware systems - designed specifically for factory automation, energy infrastructure, and automotive electronics where deterministic reset behavior is non-negotiable.
FAQ
What is the exact threshold voltage of TPS3899PL42DSER?
The TPS3899PL42DSER has a factory-set fixed negative-going threshold (VIT−) of 4.2 V with ±0.5% typical accuracy across –40°C to +125°C. This value is laser-trimmed and specified in TI's official datasheet SLVSFM0C; it does not require external resistor programming and remains stable under load and temperature variation.
Does TPS3899PL42DSER require an external pull-up resistor on the RESET pin?
No, TPS3899PL42DSER uses a push-pull active-low output configuration, so the RESET pin drives both high (≥0.8×VDD) and low (≤300 mV @ 2 mA) internally. Unlike open-drain variants (e.g., TPS3899DL42DSER), no external pull-up resistor is needed - simplifying layout and reducing component count.
How do CTS and CTR capacitors affect reset timing in TPS3899PL42DSER?
In TPS3899PL42DSER, the CTS capacitor sets the sense delay (RESET assertion time after SENSE falls below 4.2V), while the CTR capacitor sets the reset delay (RESET deassertion time after SENSE rises above 4.41V). Each uses a 500kΩ internal pull-up and 0.73×VDD threshold; timing follows t = 654.7kΩ × C + base delay (50µs for CTS, 80µs for CTR).
Can TPS3899PL42DSER monitor a 12V rail?
Yes - the SENSE pin accepts 0–6V directly, but a resistor divider (e.g., 2:1) allows monitoring of 12V rails while keeping SENSE voltage within spec. VDD may be supplied separately (e.g., 3.3V) to power the IC, enabling true rail independence and fault isolation between monitored and supply domains.
Is TPS3899PL42DSER qualified for automotive applications?
TPS3899PL42DSER is specified from –40°C to +125°C and supports functional safety documentation, but it is not AEC-Q200 qualified. For automotive body control modules, it is used in non-safety-critical subfunctions (e.g., accessory power sequencing); TI recommends TPS3899-Q1 for ASIL-B compliant designs.
TPS3899PL42DSER Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 6-WFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Monitor
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.2V
- Output:
- Push-Pull
- Reset:
- Active Low
- Reset Timeout:
- 40µs Typical
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-WSON (1.5x1.5)
TPS3899PL42DSER FAQ
1.How can I place an order for TPS3899PL42DSER through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3899PL42DSER 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 TPS3899PL42DSER reliable?
The price and inventory of TPS3899PL42DSER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3899PL42DSER is usually 5 days.
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4.How is shipping managed for TPS3899PL42DSER?
TPS3899PL42DSER orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3899PL42DSER 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 TPS3899PL42DSER?
For technical support, including TPS3899PL42DSER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3899PL42DSER requirements.
6.How does Aetrix verify that TPS3899PL42DSER is sourced from the original manufacturer or authorized distributors?
All TPS3899PL42DSER 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 TPS3899PL42DSER meets industry standards.
7.What is the process for return or replacement of TPS3899PL42DSER?
All TPS3899PL42DSER units undergo pre-shipment inspection (PSI). If there is an issue with TPS3899PL42DSER, 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 TPS3899PL42DSER part is unused and in its original packaging.
Return procedure for TPS3899PL42DSER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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