My Inquiry
My Account
Texas Instruments TPS3805H33QDCKRQ1
- Part No.:
- TPS3805H33QDCKRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
TPS3805H33QDCKRQ1.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:7,897
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS3805H33QDCKRQ1 from Texas Instruments is an automotive-grade dual-voltage supervisor IC that monitors both a fixed 3.3-V supply (VDD) and an adjustable secondary voltage (SENSE) with 1.226-V internal reference. It features push-pull RESET output, ±1.5% threshold accuracy, 3 μA typical supply current at 3.3 V, and operates from –40°C to 125°C. It is used in automotive infotainment systems to ensure reliable power-on reset sequencing for microcontrollers.
For engineers reviewing the TPS3805H33QDCKRQ1 datasheet, TPS3805H33QDCKRQ1 pinout, TPS3805H33QDCKRQ1 application, or TPS3805H33QDCKRQ1 equivalent, key selection criteria include dual-supply monitoring capability, push-pull output drive strength, SC-70 package thermal performance, and AEC-Q100 qualification for automotive safety-critical subsystems.
Technical Context
The TPS3805H33QDCKRQ1 implements two independent comparators: one fixed-threshold comparator for VDD (3.05 V nominal) and one adjustable comparator for SENSE (1.226 V reference). Both inputs feature built-in hysteresis (30 mV typical for 3.3-V range) to prevent false resets during noise or slow-rising supplies.
RESET assertion occurs when either VDD drops below 3.05 V or SENSE drops below its configured threshold; deassertion requires both voltages to exceed their respective thresholds. The device asserts RESET during power-up when VDD rises above 0.8 V and maintains supervision until stable operation is confirmed.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Threshold | 3.05 V ±1.5% - precisely monitors 3.3-V rail for brownout detection without external resistors |
| SENSE Reference | 1.226 V internal reference - enables accurate monitoring of any secondary rail ≥1.226 V via resistor divider |
| RESET Output Type | Push-pull - eliminates need for external pull-up resistor, supports direct interface to CMOS logic inputs |
| Supply Current | 3 μA typical at 3.3 V - enables ultra-low-power supervision in always-on automotive modules |
| Operating Temp | –40°C to 125°C - qualified per AEC-Q100 Grade 1 for under-hood and dashboard electronics |
| Hysteresis | 30 mV (for VIT > 2.5 V) - prevents chatter during marginal supply conditions near threshold |
| Propagation Delay | 5–100 μs - ensures fast response to supply faults while filtering sub-microsecond transients |
Pinout & Package
TPS3805H33QDCKRQ1 is housed in a 5-pin SC-70 (DCK) package measuring 2.00 mm × 1.25 mm, optimized for space-constrained automotive PCB layouts and compatible with standard reflow profiles (MSL Level-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Primary return path for internal comparators and output driver; must be low-impedance connection to system ground plane |
| RESET | Active-low reset output | Push-pull CMOS output capable of sinking 2 mA or sourcing 1 mA; directly drives MCU reset input without pull-up |
| SENSE | Adjustable voltage monitor input | High-impedance (±25 nA bias) input referenced to 1.226 V; accepts resistor-divider scaled secondary supply |
| VDD | Main supply and fixed-threshold input | Monitors 3.3-V rail directly; also powers internal circuitry; valid from 1.3 V to 6 V |
| NC | No internal connection | Pin 1 is unconnected die bond pad; must remain floating or grounded per layout guidelines to avoid parasitic coupling |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent monitoring | Simultaneously supervises primary 3.3-V rail and secondary adjustable rail - eliminates need for two discrete supervisors |
| AEC-Q100 Grade 1 qualification | Validated for automotive use from –40°C to 125°C ambient - supports ASIL-B system-level safety requirements |
| Transient immunity | Immune to short negative transients on VDD/SENSE pins - suppresses false resets caused by load-dump or switching noise |
| Low quiescent current | 3 μA typical supply current - extends battery life in always-on vehicle modules such as telematics gateways |
| Fixed + adjustable architecture | 3.05-V VDD threshold + 1.226-V SENSE reference - simplifies design for 3.3-V systems requiring secondary rail monitoring |
Applications
| Automotive Infotainment Head Unit | ADAS Domain Controller |
|---|---|
|
Use Scenario: Monitors 3.3-V I/O supply and 1.8-V core supply in a multimedia SoC-based head unit during cold cranking. IC Role / Device Role / Timing Role: Dual-supply supervisor ensuring synchronized reset release only after both rails stabilize above thresholds. Use Value: Prevents firmware lockup by guaranteeing SoC reset remains asserted until both critical supplies meet timing and voltage margins. |
Use Scenario: Supervises 3.3-V sensor interface rail and 2.5-V image processor rail in a camera fusion ECU exposed to engine bay temperature swings. IC Role / Device Role / Timing Role: Automotive-grade voltage detector providing fail-safe reset signaling to MCU upon undervoltage on either monitored rail. Use Value: Enables deterministic system recovery after transient supply dips caused by high-current actuator switching. |
| Instrument Cluster Display | Body Control Module (BCM) |
|
Use Scenario: Ensures clean power-on reset for a TFT display controller and touch controller sharing a 3.3-V supply while monitoring a separate 5-V backlight driver enable line. IC Role / Device Role / Timing Role: Dual-input supervisor asserting RESET until both display logic and backlight enable rails are valid. Use Value: Eliminates display artifacts or ghost touches during ignition sequence by enforcing strict dual-rail power-good sequencing. |
Use Scenario: Provides redundant voltage supervision for 3.3-V CAN transceiver supply and 1.2-V microcontroller core rail in a LIN/CAN gateway module. IC Role / Device Role / Timing Role: Fault-tolerant reset generator that triggers system reset if either communication or control rail falls out of spec. Use Value: Maintains network integrity by preventing partial initialization of CAN nodes during unstable power conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3803-01QDCKRQ1 | Single adjustable-threshold supervisor (1.226 V reference), open-drain RESET, no fixed 3.3-V monitoring | Requires external resistor divider for all rails; lacks integrated 3.3-V detection; needs pull-up resistor | Choose when only one supply needs monitoring and board space allows for external components |
| TLV809E33DBVR | Single 3.3-V supervisor, open-drain RESET, ±2% threshold accuracy, 0.9-μA quiescent current | No SENSE input; cannot monitor secondary rail; lower accuracy and no AEC-Q100 qualification | Acceptable for non-automotive 3.3-V-only applications where cost and ultra-low current outweigh dual-monitoring need |
Compared with TPS3803-01QDCKRQ1 and TLV809E33DBVR, the TPS3805H33QDCKRQ1 uniquely delivers integrated dual-rail supervision with automotive qualification, push-pull output, and tighter threshold accuracy-making it the only option that satisfies simultaneous 3.3-V and secondary rail monitoring in AEC-Q100-compliant designs.
Availability
TPS3805H33QDCKRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS domain controllers, and instrument cluster applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TPS3805H33QDCKRQ1 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 automotive electronics and power management solutions.
The TPS380x-Q1 family was designed specifically for automotive voltage supervision, delivering AEC-Q100-qualified, low-power, dual-input reset generators for DSP, MCU, and SoC-based systems requiring robust power-on and brownout protection.
FAQ
What is the exact VDD threshold voltage of the TPS3805H33QDCKRQ1?
The TPS3805H33QDCKRQ1 has a nominal VDD threshold voltage of 3.05 V with ±1.5% accuracy over temperature and voltage. This value is factory-trimmed and specified in the Electrical Characteristics table (Section 7.5) of the datasheet under "VIT" for TPS3805H33. It is designed to reliably monitor standard 3.3-V rails without external components.
Does the TPS3805H33QDCKRQ1 require an external pull-up resistor on the RESET pin?
No, the TPS3805H33QDCKRQ1 features a push-pull RESET output, so it does not require an external pull-up resistor. Unlike open-drain variants such as TPS3803G15-Q1, this device actively drives both high and low states, enabling direct connection to CMOS reset inputs of microcontrollers or processors without additional components.
Can the TPS3805H33QDCKRQ1 monitor a 5-V supply rail?
Yes - the SENSE input of the TPS3805H33QDCKRQ1 accepts any voltage ≥1.226 V when scaled via an external resistor divider. To monitor a 5-V rail, use a precision divider (e.g., R1 = 30.1 kΩ, R2 = 10.0 kΩ) to scale 5 V down to 1.226 V at SENSE. The internal 1.226-V reference ensures accurate threshold tracking across temperature.
Is the TPS3805H33QDCKRQ1 qualified for automotive use?
Yes, the TPS3805H33QDCKRQ1 is AEC-Q100 qualified (Grade 1, –40°C to 125°C) and explicitly designed for automotive applications including infotainment, ADAS, and body electronics. Its qualification is documented in the device nomenclature ("Q1"), packaging addendum, and Functional Safety FIT data provided by Texas Instruments.
What is the maximum supply voltage the TPS3805H33QDCKRQ1 can tolerate on VDD?
The absolute maximum VDD rating for the TPS3805H33QDCKRQ1 is 7 V, but the recommended operating range is 1.3 V to 6 V per Section 7.3 of the datasheet. Continuous operation above 6 V is not advised; operation at 7 V is limited to ≤1000 hours to ensure long-term reliability.
TPS3805H33QDCKRQ1 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
TPS3805H33QDCKRQ1 FAQ
1.How can I place an order for TPS3805H33QDCKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3805H33QDCKRQ1 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 TPS3805H33QDCKRQ1 reliable?
The price and inventory of TPS3805H33QDCKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3805H33QDCKRQ1 is usually 5 days.
3.What payment methods are accepted for TPS3805H33QDCKRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3805H33QDCKRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS3805H33QDCKRQ1?
TPS3805H33QDCKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3805H33QDCKRQ1 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 TPS3805H33QDCKRQ1?
For technical support, including TPS3805H33QDCKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3805H33QDCKRQ1 requirements.
6.How does Aetrix verify that TPS3805H33QDCKRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS3805H33QDCKRQ1 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 TPS3805H33QDCKRQ1 meets industry standards.
7.What is the process for return or replacement of TPS3805H33QDCKRQ1?
All TPS3805H33QDCKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3805H33QDCKRQ1, 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 TPS3805H33QDCKRQ1 part is unused and in its original packaging.
Return procedure for TPS3805H33QDCKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS3805H33QDCKRQ1 Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
