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Texas Instruments TPS7B8333QDCYRQ1W
- Part No.:
- TPS7B8333QDCYRQ1W
- Manufacturer:
- Texas Instruments
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
TPS7B8333QDCYRQ1W.pdf
- Description:
- LINEAR & LOW-DROUPOUT (LDO) REGU
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
TPS7B8333QDCYRQ1W from Texas Instruments is an AEC-Q100 Grade 1 automotive-grade low-dropout linear regulator (LDO) delivering fixed 3.3 V output at up to 150 mA. It operates from 3 V to 40 V input, features ±1% DC output accuracy over line/load/temperature, 230 mV max dropout at 150 mA, and 18 µA typical quiescent current - enabling reliable always-on power for microcontrollers and CAN transceivers in battery-connected automotive systems.
For engineers reviewing the TPS7B8333QDCYRQ1W datasheet, TPS7B8333QDCYRQ1W pinout, TPS7B8333QDCYRQ1W application, or TPS7B8333QDCYRQ1W equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive operating conditions (–40°C to +125°C ambient, –40°C to +150°C junction), and real-world transient performance data including ±2% VOUT deviation during cold-crank and 100 µs load transient settling time.
Technical Context
The TPS7B8333QDCYRQ1W implements a high-PSRR, low-noise LDO architecture with integrated undervoltage lockout (UVLO: 2.6 V rising / 2.5 V falling), thermal shutdown (175°C trip, 20°C hysteresis), and brickwall current limiting (180–260 mA). Its novel control loop minimizes output overshoot during dropout recovery while maintaining ±1% regulation across –40°C to +150°C junction temperature.
Designed specifically for automotive battery rail connection, it withstands 42 V absolute maximum input transients (e.g., load dump), supports cold-crank operation with ±2% line transient response at 1-V/µs slew rate, and remains stable with ≥2.2 µF ceramic output capacitance - eliminating need for external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V - eliminates external feedback network; ensures precise MCU/CAN supply without trimming. |
| Input Voltage Range | 3 V to 40 V (42 V abs max) - supports full automotive battery range including cold-crank (≈4.5 V) and load dump (≤42 V). |
| Max Output Current | 150 mA - sufficient for low-power MCUs, CAN transceivers, and sensor interfaces in body electronics. |
| Output Accuracy | ±1% over line, load, and temperature - guarantees consistent logic-level compatibility and ADC reference stability. |
| Quiescent Current | 18 µA (typ) at no load - enables <10 µA system standby current when paired with enable-controlled downstream circuits. |
| Dropout Voltage | 230 mV (max) at 150 mA - allows regulation down to VIN = 3.53 V, critical for deep battery discharge survival. |
| PSRR @ 1 kHz | 55 dB - suppresses alternator ripple and switching noise to protect sensitive analog/digital circuitry. |
Pinout & Package
Package: 3-pin SOT-223 (DCY), 6.50 mm × 3.50 mm body size, with exposed thermal pad connected to GND pins (pins 2 and 4) for enhanced thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Unregulated input power | Accepts 3–40 V battery rail; requires ≥0.1 µF ceramic capacitor to GND for EMI robustness and transient suppression. |
| 2, 4 (GND) | Ground reference & thermal path | Dual GND pins (including thermal pad) must be soldered to large copper pour for RθJB = 11.7°C/W thermal performance. |
| 3 (OUT) | Regulated 3.3 V output | Delivers stable 3.3 V to load; requires ≥2.2 µF ceramic capacitor to GND for stability and optimal transient response. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation - meets automotive cabin and under-hood thermal requirements. |
| Functional Safety-Capable documentation | TI provides FIT rate, failure mode analysis, and safety manual - accelerates ISO 26262 ASIL-B system certification. |
| Ultra-low quiescent current | 18 µA typ enables >1-year battery life in always-on RKE modules without wake-up leakage penalties. |
| Cold-crank transient immunity | ±2% VOUT deviation during 1-V/µs line transients - maintains MCU clock and CAN bus integrity during engine start. |
| Stable with small ceramic capacitors | Works with ≥2.2 µF X5R/X7R ceramics (ESR 1 mΩ–2 Ω) - avoids costly tantalum or polymer caps and simplifies layout. |
Applications
| Reconfigurable Instrument Clusters | Body Control Modules (BCM) |
|---|---|
Use Scenario: Powering display controllers and graphics processors during vehicle ignition sequence and dynamic UI updates. IC Role / Device Role / Timing Role: Primary 3.3 V LDO supplying SoC I/O rails and display interface logic. Use Value: ±1% accuracy ensures consistent pixel timing and color depth; 100 µs load transient settling prevents screen flicker during rapid GUI transitions. |
Use Scenario: Supplying door module MCUs, window lift drivers, and interior lighting controllers in centralized BCM architecture. IC Role / Device Role / Timing Role: Always-on 3.3 V regulator enabling fast wake-from-sleep response and CAN message buffering. Use Value: 18 µA IQ extends battery runtime during vehicle sleep; 40 V input tolerance survives jump-start and alternator surge events. |
| Automotive Gateways | Remote Keyless Entry (RKE) |
Use Scenario: Providing clean 3.3 V power to multi-protocol gateway SoCs handling CAN FD, LIN, and Ethernet traffic routing. IC Role / Device Role / Timing Role: Secondary regulated rail decoupling high-speed communication PHYs from noisy main battery domain. Use Value: 55 dB PSRR at 1 kHz attenuates alternator ripple that could corrupt Ethernet PHY clock recovery or CAN bit timing. |
Use Scenario: Powering ultra-low-power RKE receiver ICs and sub-GHz transceivers in key fobs and vehicle receivers. IC Role / Device Role / Timing Role: Standby-mode LDO maintaining real-time clock and wake-up interrupt logic during vehicle off-state. Use Value: 18 µA IQ enables >5-year coin-cell battery life; UVLO hysteresis (230 mV) prevents brownout oscillation during weak-battery key press events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7B8233QDCYRQ1 | Lower IQ (12 µA typ), same 3.3 V/150 mA output, but reduced PSRR (45 dB @ 1 kHz) and no functional safety documentation. | Better suited for ultra-low-power RKE fobs where PSRR is non-critical; not recommended for gateway or instrument cluster use. | Select when minimizing standby current is primary goal and functional safety certification is not required. |
| NCP163AMX330TBG | Non-automotive grade (no AEC-Q100), wider input (2.2–60 V), higher IQ (25 µA), ±2% accuracy, no UVLO hysteresis. | Limited to industrial or consumer applications; lacks cold-crank validation and automotive thermal derating data. | Consider only for non-automotive designs requiring extended input range; not suitable for production automotive ECUs. |
Compared with TPS7B8333QDCYRQ1W, TPS7B8233QDCYRQ1 offers lower quiescent current but sacrifices PSRR and safety documentation, while NCP163AMX330TBG provides broader input voltage support at the cost of automotive qualification and tighter accuracy - making TPS7B8333QDCYRQ1W the optimal choice for safety-critical, thermally demanding automotive LDO applications.
Availability
TPS7B8333QDCYRQ1W is available at Aetrix Electronics and suitable for reconfigurable instrument clusters, body control modules, and automotive gateways requiring stable component supply with AEC-Q100 compliance and long-term automotive lifecycle support.
Supply support for TPS7B8333QDCYRQ1W 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 automotive ICs, with decades of automotive qualification expertise and broad functional safety infrastructure.
The TPS7B83-Q1 product line delivers high-reliability, low-quiescent-current LDOs engineered specifically for battery-connected automotive subsystems - prioritizing cold-crank resilience, load-dump survival, and ISO 26262-ready design documentation.
FAQ
What is the maximum input voltage rating for the TPS7B8333QDCYRQ1W?
The TPS7B8333QDCYRQ1W has an absolute maximum input voltage of 42 V, with recommended operating range from 3 V to 40 V. This 40 V upper limit ensures robust operation during automotive load dump events, while the 42 V absolute rating provides margin against transient spikes. Exceeding 42 V risks permanent damage per the Absolute Maximum Ratings table.
Does the TPS7B8333QDCYRQ1W require an external enable signal?
No, the TPS7B8333QDCYRQ1W does not include an enable pin - it operates continuously when input voltage exceeds the UVLO rising threshold (2.6 V min). This simplifies design for always-on applications like RKE receivers and gateway standby rails, eliminating need for external control logic or pull-up resistors.
What output capacitor value is required for stability with the TPS7B8333QDCYRQ1W?
The TPS7B8333QDCYRQ1W requires a minimum 2.2 µF ceramic output capacitor (X5R or X7R dielectric) with ESR between 0.001 Ω and 2 Ω for guaranteed stability. TI validates stability across this range in Figure 6-31; using smaller values or higher-ESR capacitors may cause oscillation or degraded transient response.
How does the TPS7B8333QDCYRQ1W perform during cold-crank conditions?
During cold-crank (simulated by 1-V/µs input slew rate), the TPS7B8333QDCYRQ1W exhibits ±2% output voltage deviation - confirmed in datasheet Figure 6-14 and Section 1 Features. This tight transient response preserves MCU reset thresholds and CAN transceiver functionality when battery voltage dips to ≈4.5 V during engine cranking.
Is the TPS7B8333QDCYRQ1W qualified for automotive use?
Yes, the TPS7B8333QDCYRQ1W is AEC-Q100 qualified for automotive applications (Grade 1: –40°C to +125°C ambient, –40°C to +150°C junction). It also includes functional safety documentation (FIT rate, FMEA, safety manual) to support ISO 26262 ASIL-B system development - confirmed in Section 1 Features and Section 11 Device and Documentation Support.
TPS7B8333QDCYRQ1W Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.23V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 26 µA
- Current - Supply (Max):
- -
- PSRR:
- 55dB (1kHz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-4
TPS7B8333QDCYRQ1W FAQ
1.How can I place an order for TPS7B8333QDCYRQ1W through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS7B8333QDCYRQ1W 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 TPS7B8333QDCYRQ1W reliable?
The price and inventory of TPS7B8333QDCYRQ1W are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS7B8333QDCYRQ1W is usually 5 days.
3.What payment methods are accepted for TPS7B8333QDCYRQ1W?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS7B8333QDCYRQ1W transactions.
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4.How is shipping managed for TPS7B8333QDCYRQ1W?
TPS7B8333QDCYRQ1W orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS7B8333QDCYRQ1W 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 TPS7B8333QDCYRQ1W?
For technical support, including TPS7B8333QDCYRQ1W datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS7B8333QDCYRQ1W requirements.
6.How does Aetrix verify that TPS7B8333QDCYRQ1W is sourced from the original manufacturer or authorized distributors?
All TPS7B8333QDCYRQ1W 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 TPS7B8333QDCYRQ1W meets industry standards.
7.What is the process for return or replacement of TPS7B8333QDCYRQ1W?
All TPS7B8333QDCYRQ1W units undergo pre-shipment inspection (PSI). If there is an issue with TPS7B8333QDCYRQ1W, 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 TPS7B8333QDCYRQ1W part is unused and in its original packaging.
Return procedure for TPS7B8333QDCYRQ1W:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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