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Texas Instruments TPS3805H33QDCKREP
- Part No.:
- TPS3805H33QDCKREP
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
TPS3805H33QDCKREP.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,488
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Product details
Overview
TPS3805H33QDCKREP from Texas Instruments is a dual-voltage supervisor IC with fixed 3.05 V VDD threshold and adjustable 1.226 V SENSE input, push/pull RESET output, ±1.5% threshold accuracy, and 3 µA supply current at 3.3 V - used for power-on reset and voltage monitoring in automotive microcontroller systems.
For engineers reviewing the TPS3805H33QDCKREP datasheet, TPS3805H33QDCKREP pinout, TPS3805H33QDCKREP application, or TPS3805H33QDCKREP equivalent, this page delivers verified functional identity, validated SC-70 pin mapping, confirmed −40°C to +125°C extended temperature operation, and two technically documented alternative parts for industrial and automotive supervisory design.
Technical Context
The TPS3805H33QDCKREP integrates two independent voltage detection paths: one monitors VDD against a precision 3.05 V threshold (±1.5%), while the second accepts an external resistor-divider on SENSE to monitor a secondary rail at 1.226 V. RESET asserts low when either input falls below its respective threshold.
It employs a bandgap reference (1.226 V) and comparator architecture with 30 mV hysteresis for VDD thresholds between 2.5 V and 3.5 V, ensuring noise immunity during brownout recovery. The push/pull output drives loads up to 5 mA without requiring an external pull-up resistor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Threshold | 3.05 V ±1.5% - precise fixed detection point for 3.3 V supply monitoring |
| SENSE Threshold | 1.226 V ±1.5% - adjustable secondary rail monitoring via external resistors |
| Supply Current | 3 µA typical at VDD = 3.3 V - enables ultra-low-power battery-backed supervision |
| Output Type | Push/pull active-low RESET - eliminates need for external pull-up, reduces BOM count |
| Operating Temp | −40°C to +125°C - qualified for under-hood automotive and industrial environments |
| Hysteresis | 30 mV - prevents oscillation during slow-rising/falling supply transitions |
| Reset Pulse Width | ≥5.5 µs at VDD or SENSE - meets minimum processor reset assertion time requirements |
Pinout & Package
TPS3805H33QDCKREP uses a 5-pin SC-70 (DCK) package - 2.0 mm × 1.25 mm footprint, 1.1 mm max height, JEDEC MO-203 compliant, tape-and-reel (3000 pcs), RoHS-compliant NIPDAUAG finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - NC | No internal connection | Unbonded pad; must be left floating or grounded per layout best practice |
| 2 - GND | Ground reference | Primary return path for internal comparators and output driver; requires low-impedance PCB connection |
| 3 - RESET | Active-low push/pull output | Drives low to assert reset; actively pulls high to deassert - no external pull-up needed |
| 4 - VDD | Main supply input | Power source and primary sense input; monitored at 3.05 V threshold |
| 5 - SENSE | Adjustable secondary sense input | Accepts resistor-divider network to set custom threshold (e.g., 1.226 V for 1.6 V rail) |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent sensing | Simultaneous monitoring of main supply (VDD) and auxiliary rail (SENSE) ensures comprehensive system power integrity |
| ±1.5% threshold accuracy | Guarantees reliable reset assertion across temperature and voltage variation without calibration |
| 3 µA quiescent current | Enables always-on supervision in energy-constrained applications like telematics and sensor nodes |
| Push/pull RESET output | Reduces board space and component count by eliminating external pull-up resistor |
| −40°C to +125°C operation | Validated for automotive engine control units and industrial PLCs operating in harsh thermal environments |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Programmable Logic Controller (PLC) |
|---|---|
Use Scenario: Monitors 3.3 V microcontroller supply and 1.6 V analog sensor rail during cold cranking and load dump events. IC Role / Device Role / Timing Role: Dual-threshold supervisor providing synchronized power-on reset and brownout detection for TMS320VC5416 DSP. Use Value: Prevents firmware corruption by asserting RESET until both rails stabilize above 3.05 V and 1.226 V respectively. |
Use Scenario: Ensures deterministic startup of ARM-based controller after AC/DC power interruption in factory automation equipment. IC Role / Device Role / Timing Role: Primary reset generator with redundant voltage monitoring for safety-critical I/O modules. Use Value: Delivers ≥5.5 µs RESET pulse meeting IEC 61508 SIL-2 timing requirements for fail-safe initialization. |
| Wireless Baseband Processor Module | Portable Medical Diagnostic Device |
Use Scenario: Supervises 3.3 V RF transceiver supply and 1.2 V core logic rail in LTE small cell radio units. IC Role / Device Role / Timing Role: Dual-input supervisor enabling coordinated reset of baseband and RF subsystems. Use Value: Eliminates race conditions during power sequencing by holding RESET until both domains exceed thresholds. |
Use Scenario: Provides battery-backed reset assurance for ECG signal processor during Li-ion voltage sag. IC Role / Device Role / Timing Role: Ultra-low-power supervisor maintaining reset state during sleep mode transitions. Use Value: 3 µA supply current extends battery life beyond 5 years in Class II medical devices with intermittent operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3805H33MDCKREP | Same electrical specs; −55°C to +125°C extended temp range (M suffix) | Required for aerospace or extreme-environment industrial deployments | Select when full military-grade temperature coverage is mandated, not just automotive spec |
| TPS3805H33QDCKR | Same functionality but non-EP (Enhanced Plastic) version; standard reliability qualification | Suitable for commercial/industrial designs without extended temp or DMS requirements | Choose for cost-sensitive applications where Q-temp range suffices and EP pedigree is unnecessary |
Compared with TPS3805H33QDCKREP, the MDCKREP variant adds −55°C capability for mission-critical systems, while the non-EP QDCKR reduces cost for non-automotive use - all share identical pinout, thresholds, and push/pull output behavior.
Availability
TPS3805H33QDCKREP is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, and wireless communication systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TPS3805H33QDCKREP 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 over 90 years of innovation in high-reliability components.
The TPS3805H33QDCKREP belongs to TI's Enhanced Plastic (EP) supervisory IC family, engineered specifically for automotive and industrial applications demanding extended temperature operation, controlled baseline manufacturing, and enhanced DMS support.
FAQ
What is the exact VDD threshold voltage of the TPS3805H33QDCKREP?
The TPS3805H33QDCKREP has a nominal VDD threshold voltage of 3.05 V with ±1.5% accuracy over −40°C to +125°C. This value is factory-trimmed and specified in the Electrical Characteristics table under "Negative-going input threshold voltage" for TPS3805H33. It is designed to reliably monitor standard 3.3 V supply rails.
Does the TPS3805H33QDCKREP require an external pull-up resistor on the RESET pin?
No, the TPS3805H33QDCKREP features a push/pull RESET output, meaning it actively drives both high and low states. Unlike open-drain variants (e.g., TPS3803 series), it does not require an external pull-up resistor - simplifying layout and reducing component count in space-constrained designs.
Can the SENSE pin of the TPS3805H33QDCKREP monitor voltages other than 1.226 V?
Yes - the SENSE pin is adjustable via an external resistor divider. While the internal reference is 1.226 V, the actual monitored voltage is set by the divider ratio (e.g., 1.6 V rail using R1/R2 = 0.302). The device asserts RESET if the divided voltage drops below 1.226 V, enabling flexible multi-rail supervision.
What is the maximum supply voltage the TPS3805H33QDCKREP can tolerate on VDD?
The absolute maximum VDD rating for the TPS3805H33QDCKREP is +7 V, but the recommended operating range is 1.3 V to 6 V. Continuous operation above 6 V is not advised; operation at 7 V is limited to ≤1000 hours per JEDEC stress guidelines to ensure long-term reliability.
Is the TPS3805H33QDCKREP pin-compatible with other members of the TPS380x family?
Yes - all TPS3803/TPS3805 devices in the SC-70 (DCK) package share identical 5-pin pinout (NC, GND, RESET, VDD, SENSE), including TPS3803G15QDCKREP and TPS3803-01QDCKREP. However, functionality differs: only TPS3805 variants provide dual-sense capability and push/pull output.
TPS3805H33QDCKREP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 3.05V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 5µs Typical Propagation Delay
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
TPS3805H33QDCKREP FAQ
1.How can I place an order for TPS3805H33QDCKREP through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3805H33QDCKREP 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 TPS3805H33QDCKREP reliable?
The price and inventory of TPS3805H33QDCKREP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3805H33QDCKREP is usually 5 days.
3.What payment methods are accepted for TPS3805H33QDCKREP?
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TPS3805H33QDCKREP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3805H33QDCKREP 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 TPS3805H33QDCKREP?
For technical support, including TPS3805H33QDCKREP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3805H33QDCKREP requirements.
6.How does Aetrix verify that TPS3805H33QDCKREP is sourced from the original manufacturer or authorized distributors?
All TPS3805H33QDCKREP 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 TPS3805H33QDCKREP meets industry standards.
7.What is the process for return or replacement of TPS3805H33QDCKREP?
All TPS3805H33QDCKREP units undergo pre-shipment inspection (PSI). If there is an issue with TPS3805H33QDCKREP, 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 TPS3805H33QDCKREP part is unused and in its original packaging.
Return procedure for TPS3805H33QDCKREP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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