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Texas Instruments TPS3836K33DBVRG4
- Part No.:
- TPS3836K33DBVRG4
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS3836K33DBVRG4.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TPS3836K33DBVRG4 from Texas Instruments is a nano-power voltage supervisor IC designed for undervoltage monitoring and system reset generation in battery-powered microcontroller applications. It features a 2.93 V threshold voltage (VIT), 220 nA typical supply current, and selectable 10 ms or 200 ms reset delay via the CT pin - used to safeguard MSP430-based systems powered by 3.6 V lithium-ion batteries.
For engineers reviewing the TPS3836K33DBVRG4 datasheet, TPS3836K33DBVRG4 pinout, TPS3836K33DBVRG4 application, or TPS3836K33DBVRG4 equivalent, key selection criteria include its push-pull active-low RESET output, SOT-23-5 package compatibility, –40°C to 85°C operating range, and precise 2.93 V supervision level optimized for 3.3 V nominal rail systems.
Technical Context
The TPS3836K33DBVRG4 integrates an internal voltage comparator with hysteresis (40 mV at 2.93 V), a refresh timer, and logic-controlled reset assertion/deassertion. Its CT pin selects between two fixed delay modes: 10 ms (CT = GND) or 200 ms (CT = VDD), enabling robust power-on and brownout recovery timing without external components.
It operates across 1.6 V to 6 V supply range, asserts RESET when VDD falls below 2.93 V (typical), and deasserts only after VDD rises above 2.97 V (VIT + VHYS) and remains stable for the selected delay period. Manual reset (MR) provides asynchronous low-active override with 0.3 µs propagation delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.6 V to 6 V - supports direct monitoring of Li-ion (3.6 V), 3.3 V, and 2.5 V rails without regulation. |
| Threshold Voltage (VIT) | 2.93 V (typical), ±3% over temperature - precisely matches 3.3 V system undervoltage detection at 3.0 V margin. |
| Supply Current (IDD) | 220 nA (typical) at VDD > VIT, <450 nA max - enables multi-year operation on coin cells or energy-harvesting sources. |
| Reset Delay Options | 10 ms (CT = GND) or 200 ms (CT = VDD) - eliminates need for external RC timing networks in portable designs. |
| Output Type | Active-low push-pull RESET - drives logic directly without pull-up resistor, reducing BOM count and leakage risk. |
| Propagation Delay (tPHL) | 10 µs (max) from VDD drop to RESET assertion - ensures fast fault response before MCU state corruption. |
| Operating Temperature | –40°C to +85°C - qualified for industrial and extended-temperature embedded applications. |
Pinout & Package
TPS3836K33DBVRG4 is housed in a 5-pin SOT-23 (DBV) package, 2.90 mm × 1.60 mm body size, with gull-wing leads and RoHS-compliant NiPdAu finish. Pin 1 is marked with a dot; device orientation follows JEDEC MO-178AB standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power input and monitored supply rail | Primary voltage source; internal comparator measures this node against 2.93 V reference - must be decoupled with ≥0.1 µF ceramic capacitor. |
| GND | Ground reference | Analog and digital return path; connects to system ground plane to minimize noise coupling into threshold detection. |
| CT | Delay configuration control | Logic-selectable reset timer: tied to GND → 10 ms delay; tied to VDD → 200 ms delay - no external capacitor required. |
| MR | Manual reset input | Active-low asynchronous reset trigger; if unused, must be tied to VDD to prevent leakage-induced false resets. |
| RESET | Active-low push-pull output | Drives MCU reset pin directly; sinks up to 2 mA and sources up to 3 mA - eliminates external pull-up and reduces standby current. |
Key Features
| Feature | Design Value |
|---|---|
| Nano-power operation | 220 nA typical IDD enables >10-year battery life in always-on monitoring applications using CR2032 or similar cells. |
| Precision 2.93 V threshold | ±3% tolerance over –40°C to +85°C ensures reliable 3.3 V rail supervision without derating or margin adjustments. |
| Selectably timed reset delay | Hardware-configured 10 ms / 200 ms options replace external RC networks - simplifies layout and improves timing repeatability. |
| Push-pull active-low RESET | Eliminates need for external pull-up resistor, reducing component count, PCB area, and potential leakage paths in low-power sleep states. |
| Integrated hysteresis | 40 mV built-in VHYS prevents oscillation during slow-rising or noisy supply transitions near threshold. |
Applications
| Portable Medical Sensors | MSP430-Based Data Loggers |
|---|---|
Use Scenario: Continuous ECG patch monitors powered by single-cell Li-ion battery with strict 1 µA average current budget. IC Role / Device Role / Timing Role: Supervises 3.6 V battery voltage and asserts RESET when falling below 2.93 V to halt data acquisition and enter safe shutdown. Use Value: 220 nA quiescent current extends operational life beyond 3 years; 200 ms delay (CT = VDD) prevents false resets during transient load spikes. |
Use Scenario: Environmental sensor node logging temperature/humidity every 5 minutes using MSP430FR5969 MCU in ultra-low-power LPM3 mode. IC Role / Device Role / Timing Role: Provides power-on reset and brownout protection for the MSP430's RST/NMI pin, synchronized to battery voltage stability. Use Value: Push-pull RESET drives MSP430 reset directly - no pull-up resistor needed, eliminating 100 kΩ leakage path that would degrade LPM3 current. |
| Wireless IoT Endpoints | Industrial Handheld Terminals |
Use Scenario: BLE-enabled asset tracker powered by 3.6 V Li-SOCl₂ battery, transmitting location every 4 hours with aggressive sleep duty cycling. IC Role / Device Role / Timing Role: Monitors main supply and triggers hard reset if voltage sags below 2.93 V during RF transmission burst. Use Value: 10 ms delay (CT = GND) enables rapid recovery after brief voltage dip caused by PA turn-on, avoiding unnecessary full-system reboot. |
Use Scenario: Ruggedized barcode scanner with cold-temperature operation requirement (–25°C minimum) and 3.3 V FPGA configuration rail. IC Role / Device Role / Timing Role: Ensures FPGA receives clean, debounced reset signal during power-up and low-voltage events across full industrial temperature range. Use Value: Guaranteed –40°C to +85°C operation and 40 mV hysteresis prevent chatter during thermal cycling or supply ripple near 2.93 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3836K33DBVT | Same silicon, identical electrical specs; differs only in tape-and-reel quantity (250 vs 3000 units) and part marking (PDNI vs PDNI). | No functional difference - suitable for prototyping or low-volume production where smaller reels reduce inventory cost. | Select TPS3836K33DBVT for evaluation or pilot builds; TPS3836K33DBVRG4 preferred for high-volume manufacturing due to larger reel efficiency. |
| MAX6326UT33+T | 3.3 V supervisor with 2.97 V threshold, 1.6 µA IDD, fixed 200 ms delay, open-drain output - requires external pull-up. | Higher quiescent current limits use in multi-year battery apps; open-drain output adds BOM and leakage risk. | Choose only if legacy MAXIM footprint compatibility is required; otherwise TPS3836K33DBVRG4 offers superior nano-power performance and push-pull simplicity. |
Compared with TPS3836K33DBVT, the TPS3836K33DBVRG4 offers identical functionality with optimized logistics packaging; versus MAX6326UT33+T, it delivers 7× lower supply current and eliminates pull-up dependency - critical for long-life, space-constrained designs.
Availability
TPS3836K33DBVRG4 is available at Aetrix Electronics and suitable for portable medical sensors, MSP430-based data loggers, and wireless IoT endpoints requiring stable component supply with guaranteed long-term manufacturability.
Supply support for TPS3836K33DBVRG4 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 and embedded processing solutions, with over 50 years of innovation in power management, signal chain, and microcontroller technologies.
The TPS3836K33DBVRG4 belongs to TI's nano-power voltage supervisor family, engineered specifically for ultra-low-power microcontroller reset and battery voltage monitoring in space- and energy-constrained applications.
FAQ
What is the exact threshold voltage of the TPS3836K33DBVRG4?
The TPS3836K33DBVRG4 has a nominal threshold voltage (VIT) of 2.93 V, with a guaranteed range of 2.84 V to 2.99 V over –40°C to +85°C. This value is factory-trimmed and specified in the Electrical Characteristics table of the SLVS292F datasheet under "TPS383xK33" variant. The 2.93 V setting targets 3.3 V nominal supply rails with ~10% undervoltage margin.
Does the TPS3836K33DBVRG4 require an external pull-up resistor on the RESET pin?
No, the TPS3836K33DBVRG4 does not require an external pull-up resistor because it features an active-low push-pull RESET output. Unlike open-drain supervisors, this architecture actively drives both high and low states - enabling direct connection to MCU reset inputs while minimizing standby current and PCB area. The datasheet explicitly confirms this in Section 9.3.4.
How is the reset delay time configured on the TPS3836K33DBVRG4?
The reset delay time on the TPS3836K33DBVRG4 is set by the CT pin: connect CT to GND for a 10 ms typical delay, or to VDD for a 200 ms typical delay. No external capacitor is needed. This hardware-selectable timing eliminates variability from component tolerances and temperature drift, and is validated in the Switching Characteristics table (Section 7.8) of the SLVS292F datasheet.
Can the TPS3836K33DBVRG4 monitor a 3.6 V lithium-ion battery effectively?
Yes, the TPS3836K33DBVRG4 is specifically suited for 3.6 V lithium-ion battery monitoring. Its 2.93 V threshold provides appropriate undervoltage lockout before deep discharge, and its 1.6 V to 6 V operating range covers the full Li-ion discharge curve (4.2 V down to ~2.8 V). The typical application circuit in Section 10.2.2 of SLVS292F explicitly uses TPS3836K33 to supervise a 3.6 V Li-ion cell feeding an MSP430.
What is the maximum supply current specification for the TPS3836K33DBVRG4?
The maximum supply current (IDD) for the TPS3836K33DBVRG4 is 450 nA under recommended operating conditions (VDD > VIT, VDD > 3 V), as specified in Section 7.6 of the SLVS292F datasheet. At room temperature and VDD = 3.3 V, typical consumption is 250 nA - well within sub-µA design targets for multi-year battery operation.
TPS3836K33DBVRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.93V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 10ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TPS3836K33DBVRG4 FAQ
1.How can I place an order for TPS3836K33DBVRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3836K33DBVRG4 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 TPS3836K33DBVRG4 reliable?
The price and inventory of TPS3836K33DBVRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3836K33DBVRG4 is usually 5 days.
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TPS3836K33DBVRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3836K33DBVRG4 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 TPS3836K33DBVRG4?
For technical support, including TPS3836K33DBVRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3836K33DBVRG4 requirements.
6.How does Aetrix verify that TPS3836K33DBVRG4 is sourced from the original manufacturer or authorized distributors?
All TPS3836K33DBVRG4 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 TPS3836K33DBVRG4 meets industry standards.
7.What is the process for return or replacement of TPS3836K33DBVRG4?
All TPS3836K33DBVRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3836K33DBVRG4, 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 TPS3836K33DBVRG4 part is unused and in its original packaging.
Return procedure for TPS3836K33DBVRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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