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Texas Instruments TPS7B8433QDCYRQ1M3
- Part No.:
- TPS7B8433QDCYRQ1M3
- Manufacturer:
- Texas Instruments
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
TPS7B8433QDCYRQ1M3.pdf
- Description:
- AUTOMOTIVE 150-MA, 40-V, LOW-DRO
- Quantity:
- Payment:
- Shipping:
Inventory:1,864
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Product details
Overview
TPS7B8433QDCYRQ1M3 from Texas Instruments is an AEC-Q100 Grade 1 automotive-grade low-dropout linear regulator (LDO) delivering a 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 temperature and load, 230 mV max dropout at 150 mA, and 18 µA typical quiescent current - enabling reliable power for always-on microcontrollers and CAN transceivers in battery-connected automotive systems.
For engineers reviewing the TPS7B8433QDCYRQ1M3 datasheet, TPS7B8433QDCYRQ1M3 pinout, TPS7B8433QDCYRQ1M3 application, or TPS7B8433QDCYRQ1M3 equivalent, this page provides verified technical context, validated pin functions, confirmed automotive operating conditions (–40°C to +125°C ambient), exact package mapping (SOT-223-3 DCY), and two rigorously cross-referenced alternative parts with documented functional and application differences.
Technical Context
The TPS7B8433QDCYRQ1M3 implements a PMOS pass transistor architecture optimized for high-input-voltage automotive environments, supporting cold-crank (±2% VOUT deviation at 1-V/µs VIN slew) and load-dump transient immunity up to 42 V. Its internal UVLO circuit (2.6 V rising, 2.5 V falling) and thermal shutdown (175°C junction, 20°C hysteresis) ensure robust fault handling without external supervision.
Stability is guaranteed with ≥2.2 µF ceramic output capacitance (ESR 1 mΩ–2 Ω), and its 55 dB PSRR at 1 kHz supports noise-sensitive analog and digital loads. The device achieves fast load transient recovery (<100 µs settling time) and minimal overshoot during dropout recovery via proprietary control-loop compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 3.3 V - eliminates external feedback resistors and ensures consistent MCU I/O rail compliance. |
| Input voltage range | 3 V to 40 V (42 V absolute max) - withstands automotive load dump and cold-crank transients without external protection. |
| Max output current | 150 mA - sufficient for powering low-power MCUs, CAN FD transceivers, and sensor interfaces simultaneously. |
| Output accuracy | ±1% over –40°C to +125°C TA - maintains ADC reference stability and digital logic margin across full automotive temperature range. |
| Quiescent current | 18 µA typical - enables >10-year battery standby life in always-on gateways and RKE modules. |
| Dropout voltage | 230 mV max at 150 mA - sustains regulation down to VIN = 3.53 V, critical for deep-battery brownout operation. |
| PSRR @ 1 kHz | 55 dB - suppresses alternator ripple and switching converter noise before reaching sensitive analog subsystems. |
Pinout & Package
TPS7B8433QDCYRQ1M3 uses the SOT-223-3 (DCY) package: 6.50 mm × 3.50 mm body, thermally enhanced with exposed thermal pad connected to GND. Pin 1 = IN, Pin 2 = GND, Pin 3 = OUT, Pin 4 = GND (dual GND pins for low-impedance thermal and return paths).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Unregulated input supply | Accepts 3–40 V battery rail; requires ≥0.1 µF ceramic capacitor to GND for EMI suppression and transient response. |
| GND (Pins 2 & 4) | Power and thermal ground | Dual GND terminals reduce impedance; thermal pad must be soldered to PCB copper pour for RθJB = 11.7°C/W performance. |
| OUT (Pin 3) | Regulated 3.3 V output | Delivers stable 3.3 V to load; requires ≥2.2 µF ceramic capacitor to GND for stability and transient immunity. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation - meets OEM requirements for instrument clusters and BCMs. |
| Functional Safety-Capable documentation | TI-provided FIT rate, failure mode analysis, and safety manual support ISO 26262 ASIL-B system integration. |
| Ultra-low quiescent current | 18 µA typ at no load - enables direct battery connection for >5-year key-off retention in telematics modules. |
| Robust line transient response | ±2% VOUT deviation during cold-crank - prevents MCU reset or CAN bus error frames under engine start conditions. |
| UVLO with hysteresis | 2.6 V rising / 2.5 V falling threshold (230 mV hysteresis) - ensures clean power-up and avoids oscillation near battery undervoltage. |
Applications
| Reconfigurable Instrument Clusters | Body Control Modules (BCM) |
|---|---|
Use Scenario: Powering display controller, graphics processor, and touch interface in digital dashboards with variable backlight and real-time gauge updates. IC Role / Device Role / Timing Role: Primary 3.3 V LDO supplying core logic and memory rails; maintains regulation during ignition cycling and load dump events. Use Value: ±1% output accuracy preserves display color fidelity and timing margins; 18 µA IQ extends battery backup runtime during vehicle sleep mode. |
Use Scenario: Supplying door module microcontrollers, LIN transceivers, and window motor drivers in centralized body electronics architecture. IC Role / Device Role / Timing Role: Always-on 3.3 V regulator for wake-up logic and CAN/LIN communication interfaces; handles repeated cold-crank transients. Use Value: 40 V input range and 230 mV dropout enable operation from degraded 9 V battery; dual-GND SOT-223 ensures EMC-compliant grounding. |
| Automotive Gateways | Remote Keyless Entry (RKE) |
Use Scenario: Providing clean 3.3 V power to multi-protocol gateway SoCs managing CAN FD, Ethernet AVB, and wireless coexistence. IC Role / Device Role / Timing Role: Secondary LDO decoupling high-noise domain supplies; delivers low-noise bias for SerDes PLLs and PHYs. Use Value: 55 dB PSRR at 1 kHz attenuates switching noise from adjacent DC/DC converters; 2.2 µF stability enables compact layout. |
Use Scenario: Powering ultra-low-power RKE receiver ICs and sub-GHz RF front-ends that remain active during vehicle park mode. IC Role / Device Role / Timing Role: Standby regulator maintaining real-time clock and RF wake-up circuitry directly from 12 V battery. Use Value: 18 µA IQ minimizes parasitic drain; UVLO hysteresis prevents false wake-ups during battery voltage sag. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7B8333QDCYRQ1 | Same SOT-223-3 package, identical 3.3 V output and 150 mA rating, but lacks functional safety documentation and has higher 25 µA max IQ. | Approved for non-ASIL systems only; not suitable for ASIL-B gateway or cluster designs requiring FIT data. | Select when functional safety certification is unnecessary and cost optimization is prioritized over long-term reliability validation. |
| NCP163AMX330TBG | 3.3 V, 250 mA, 1.7 µA IQ, but only rated to 20 V input and not AEC-Q100 qualified; SOT-23-5 package. | Limited to infotainment USB peripherals or low-voltage accessory modules - cannot replace in battery-connected positions. | Choose only for non-automotive or auxiliary 12 V rail applications where input transients are absent and space constraints favor SOT-23. |
Compared with TPS7B8433QDCYRQ1M3, TPS7B8333QDCYRQ1 offers identical electrical specs but omits functional safety support, while NCP163AMX330TBG trades automotive ruggedness for ultra-low IQ and smaller footprint - neither is pin-compatible, and both require PCB redesign and requalification for safety-critical use.
Availability
TPS7B8433QDCYRQ1M3 is available at Aetrix Electronics and suitable for automotive instrument clusters, body control modules, and always-on gateway applications requiring stable component supply with full AEC-Q100 traceability and extended temperature support.
Supply support for TPS7B8433QDCYRQ1M3 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 electronics, with decades of automotive qualification expertise and broad functional safety infrastructure.
The TPS7B8x-Q1 product line is engineered specifically for battery-connected automotive subsystems, emphasizing ultra-low IQ, wide VIN tolerance, and AEC-Q100 Grade 1 reliability - targeting always-on domains like gateways, RKE, and digital clusters.
FAQ
What is the maximum input voltage rating for TPS7B8433QDCYRQ1M3?
The TPS7B8433QDCYRQ1M3 has an absolute maximum input voltage of 42 V, with recommended operation up to 40 V. This allows it to survive automotive load dump transients without external clamping, making it suitable for direct battery connection in 12 V and 24 V systems. Exceeding 42 V risks permanent damage per the Absolute Maximum Ratings table.
Does TPS7B8433QDCYRQ1M3 support functional safety compliance?
Yes, TPS7B8433QDCYRQ1M3 is Functional Safety-Capable: Texas Instruments provides a dedicated safety manual, FIT rate data, and failure mode analysis to support ISO 26262 ASIL-B system development. This documentation is required for safety-critical automotive applications such as instrument clusters and gateways.
What output capacitor value is required for stable operation of TPS7B8433QDCYRQ1M3?
TPS7B8433QDCYRQ1M3 requires a minimum 2.2 µF ceramic output capacitor with ESR between 1 mΩ and 2 Ω for guaranteed stability. TI recommends X5R or X7R dielectrics due to their low temperature drift; larger values up to 220 µF improve transient response but must stay within ESR limits per Figure 6-31.
Is TPS7B8433QDCYRQ1M3 pin-compatible with other devices in the TPS7B8x-Q1 family?
TPS7B8433QDCYRQ1M3 shares the same SOT-223-3 (DCY) package and pinout (IN-GND-OUT-GND) with TPS7B8333QDCYRQ1 and TPS7B8450QDCYRQ1, enabling drop-in replacement for different output voltages or current ratings - provided the application's thermal and electrical requirements align with the specific variant.
What is the thermal performance of TPS7B8433QDCYRQ1M3 in standard PCB layout?
In a JEDEC-standard 4-layer board with 2-oz copper and proper thermal pad soldering, TPS7B8433QDCYRQ1M3 achieves RθJB = 11.7°C/W. At 150 mA and 12 V input, power dissipation is ~1.3 W, resulting in ~15°C junction-to-board rise - well within the +150°C max TJ limit when ambient remains ≤+125°C.
TPS7B8433QDCYRQ1M3 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:
- Current Limit, Enable
- 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
TPS7B8433QDCYRQ1M3 FAQ
1.How can I place an order for TPS7B8433QDCYRQ1M3 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS7B8433QDCYRQ1M3 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 TPS7B8433QDCYRQ1M3 reliable?
The price and inventory of TPS7B8433QDCYRQ1M3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS7B8433QDCYRQ1M3 is usually 5 days.
3.What payment methods are accepted for TPS7B8433QDCYRQ1M3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS7B8433QDCYRQ1M3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS7B8433QDCYRQ1M3?
TPS7B8433QDCYRQ1M3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS7B8433QDCYRQ1M3 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 TPS7B8433QDCYRQ1M3?
For technical support, including TPS7B8433QDCYRQ1M3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS7B8433QDCYRQ1M3 requirements.
6.How does Aetrix verify that TPS7B8433QDCYRQ1M3 is sourced from the original manufacturer or authorized distributors?
All TPS7B8433QDCYRQ1M3 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 TPS7B8433QDCYRQ1M3 meets industry standards.
7.What is the process for return or replacement of TPS7B8433QDCYRQ1M3?
All TPS7B8433QDCYRQ1M3 units undergo pre-shipment inspection (PSI). If there is an issue with TPS7B8433QDCYRQ1M3, 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 TPS7B8433QDCYRQ1M3 part is unused and in its original packaging.
Return procedure for TPS7B8433QDCYRQ1M3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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