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Texas Instruments TPS7B8433QDCYRQ1W
- Part No.:
- TPS7B8433QDCYRQ1W
- Manufacturer:
- Texas Instruments
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
TPS7B8433QDCYRQ1W.pdf
- Description:
- LINEAR & LOW-DROUPOUT (LDO) REGU
- Quantity:
- Payment:
- Shipping:
Inventory:2,325
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Product details
Overview
TPS7B8433QDCYRQ1W from Texas Instruments is an AEC-Q100 Grade 1 automotive LDO regulator in SOT-223-4 package, delivering fixed 3.3 V output at up to 150 mA with ±0.75% DC accuracy over –40°C to +125°C ambient, 225 mV max dropout at full load, and 18 µA typical quiescent current - designed for always-on battery-connected modules including remote keyless entry (RKE) and automotive gateways.
For engineers reviewing the TPS7B8433QDCYRQ1W datasheet, TPS7B8433QDCYRQ1W pinout, TPS7B8433QDCYRQ1W application, or TPS7B8433QDCYRQ1W equivalent, this page delivers verified thermal metrics (RθJA = 85.5°C/W), cold-crank line transient response (±2% VOUT deviation), UVLO thresholds (2.6 V rising / 2.5 V falling), FB reference voltage (0.65 V), and functional safety documentation support - all confirmed for the exact DCY package variant.
Technical Context
The TPS7B8433QDCYRQ1W implements a bandgap-referenced error amplifier driving a PMOS pass transistor, enabling ultra-low quiescent current and fast line/load transient recovery without external compensation. Its architecture includes integrated undervoltage lockout (UVLO) with 230 mV hysteresis and thermal shutdown with 20°C hysteresis, both independently monitored and latched.
It operates across 3 V to 40 V input, supports fixed 3.3 V output without external feedback components, and maintains regulation during cold-crank events (1-V/µs VIN slew rate) with ±2% output deviation - enabled by proprietary control loop dynamics that minimize overshoot during dropout recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V - eliminates need for external resistor divider; compatible with MCU I/O and CAN transceiver supply rails. |
| Output Accuracy | ±0.75% over line, load, and temperature - ensures stable bias for precision analog sensors and SiC gate drivers. |
| Dropout Voltage | 225 mV max at 150 mA (VOUT ≥ 3.3 V) - enables operation down to VIN = 3.525 V while maintaining regulation. |
| Quiescent Current | 18 µA typ, 4 µA max when disabled - sustains >10-year battery life in always-on RKE modules. |
| Input Range | 3 V to 40 V (42 V absolute max) - withstands automotive load dump transients per ISO 7637-2 Pulse 5a. |
| Thermal Resistance | RθJA = 85.5°C/W (DCY package) - requires minimal PCB copper area for 150 mA continuous operation at TA = 125°C. |
| UVLO Threshold | 2.6 V (rising), 2.5 V (falling) with 230 mV hysteresis - prevents erratic startup during battery brownout recovery. |
Pinout & Package
SOT-223-4 (DCY) package: 6.50 mm × 3.50 mm body, exposed thermal pad soldered to GND plane for optimal heat dissipation and EMI reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Unregulated input supply | Accepts 3–40 V; requires ≥0.1 µF ceramic capacitor placed adjacent to pin for EMI suppression and transient stability. |
| 2 - EN | Active-high enable control | Drives high (>2 V) to enable; low (<0.7 V) to disable; must not float - internal high-impedance node. |
| 3 - OUT | Regulated 3.3 V output | Delivers up to 150 mA; requires ≥2.2 µF ceramic output capacitor with ESR ≤2 Ω for stability. |
| 4 - GND | Power and signal ground | Connected to thermal pad; must be low-impedance path to system ground plane for thermal and noise performance. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation - meets automotive power rail reliability requirements. |
| Functional Safety-Capable | Documentation available (FIT rate, failure modes, diagnostic coverage) to support ISO 26262 ASIL-B system design. |
| Stable with 2.2-µF output cap | Reduces BOM count and board space vs legacy LDOs requiring ≥10 µF tantalum or polymer capacitors. |
| Excellent cold-crank response | ±2% VOUT deviation during 1-V/µs line transients - maintains MCU clock integrity during engine start. |
| Low-noise output | 280 µVRMS (10 Hz–100 kHz) at 3.3 V - suitable for powering analog front-ends and precision ADC references. |
Applications
| Reconfigurable Instrument Clusters | Body Control Modules (BCM) |
|---|---|
Use Scenario: Powering display controllers and touch interface ICs in digital dashboards with variable backlight brightness and multi-zone thermal management. IC Role / Device Role / Timing Role: Primary 3.3 V bias supply for ARM Cortex-M7 microcontrollers and LVDS timing generators. Use Value: Maintains regulation during 6–16 V battery swings and cold-crank dips; ±0.75% accuracy ensures consistent display gamma calibration. | Use Scenario: Supplying door module ECUs managing window lift, mirror fold, and interior lighting with wake-on-LIN capability. IC Role / Device Role / Timing Role: Always-on 3.3 V rail for LIN transceivers and low-power sleep-state logic. Use Value: 18 µA IQ enables >15-year battery standby life; UVLO hysteresis prevents false wakeups during battery voltage ripple. |
| Automotive Gateways | Remote Keyless Entry (RKE) |
Use Scenario: Providing isolated 3.3 V domain for Ethernet AVB and CAN FD communication processors in zonal architectures. IC Role / Device Role / Timing Role: Secondary regulated rail decoupled from main 5 V domain to reduce cross-talk and improve EMC margin. Use Value: 85.5°C/W RθJA allows compact layout near high-speed interfaces; PSRR >55 dB at 1 kHz suppresses switching noise from adjacent DC/DC converters. | Use Scenario: Powering ultra-low-power sub-GHz RF SoCs and accelerometers in passive entry fobs with coin-cell batteries. IC Role / Device Role / Timing Role: Main system supply enabling <1 µA deep-sleep current and fast wake-up response. Use Value: 4 µA shutdown current extends fob battery life beyond 5 years; 225 mV dropout enables operation down to 2.8 V cell voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7B8450QDCYRQ1W | Fixed 5.0 V output; identical package, thermal, and electrical specs otherwise. | Used where 5 V logic or CAN transceivers require primary supply instead of 3.3 V. | Select when system-level voltage tree mandates 5 V bias rather than 3.3 V - no layout change required. |
| NCP163AMX330TBG | Non-automotive grade; 150 mA, 3.3 V, but only AEC-Q200 qualified (not Q100); RθJA = 120°C/W. | Limited to under-hood industrial or commercial telematics with relaxed temp range (–40°C to +105°C). | Consider only for cost-sensitive non-safety-critical designs lacking ASIL requirements or extended temperature needs. |
Compared with TPS7B8450QDCYRQ1W, the TPS7B8433QDCYRQ1W provides identical automotive robustness at 3.3 V, while NCP163AMX330TBG trades AEC-Q100 compliance and thermal performance for lower unit cost in less demanding environments.
Availability
TPS7B8433QDCYRQ1W is available at Aetrix Electronics and suitable for automotive gateways, reconfigurable instrument clusters, and remote keyless entry systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for TPS7B8433QDCYRQ1W 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 headquartered in Dallas, Texas, specializing in analog, embedded processing, and automotive ICs with over 90 years of innovation in power management and signal chain technologies.
The TPS7B84-Q1 product line was engineered specifically for automotive battery-connected always-on domains, emphasizing ultra-low IQ, wide VIN tolerance, and functional safety readiness to meet ASIL-B system requirements.
FAQ
What is the maximum input voltage rating for the TPS7B8433QDCYRQ1W?
The TPS7B8433QDCYRQ1W has an absolute maximum input voltage of 42 V, with recommended operating range from 3 V to 40 V. This 40 V upper limit enables reliable operation during automotive load dump events per ISO 7637-2 Pulse 5a, and the device remains functional even when VIN exceeds typical 12 V or 24 V battery nominal levels.
Does the TPS7B8433QDCYRQ1W require external feedback resistors?
No, the TPS7B8433QDCYRQ1W is a fixed-output variant delivering 3.3 V without external feedback components. Its internal resistor divider sets the output, eliminating layout complexity and tolerance drift. The FB pin is NC (no connect) in this configuration - unlike adjustable versions such as TPS7B8418QDRBRQ1.
What is the thermal performance of the TPS7B8433QDCYRQ1W in its SOT-223 package?
The TPS7B8433QDCYRQ1W in DCY (SOT-223-4) package has RθJA = 85.5°C/W on a standard 2-layer JEDEC board. With 150 mA load and 13.5 V input, power dissipation is ~1.58 W, resulting in ~135°C junction rise above ambient - well within the +150°C TJ max when ambient is ≤125°C, provided the thermal pad is properly soldered to GND.
How does the TPS7B8433QDCYRQ1W behave during cold-crank conditions?
The TPS7B8433QDCYRQ1W maintains ±2% output voltage deviation during cold-crank line transients with 1-V/µs input slew rate. Its fast control loop and low-output-impedance design prevent brownout resets in connected MCUs, and the ±2% spec is validated across –40°C to +150°C junction temperature - critical for engine bay applications.
Is functional safety documentation available for the TPS7B8433QDCYRQ1W?
Yes, Texas Instruments provides functional safety documentation for the TPS7B8433QDCYRQ1W, including FIT rate data, failure mode analysis, and diagnostic coverage reports - supporting ISO 26262 ASIL-B system-level development. This documentation is accessible via TI's functional safety portal and referenced in the device's official product folder.
TPS7B8433QDCYRQ1W 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
TPS7B8433QDCYRQ1W FAQ
1.How can I place an order for TPS7B8433QDCYRQ1W through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS7B8433QDCYRQ1W 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 TPS7B8433QDCYRQ1W reliable?
The price and inventory of TPS7B8433QDCYRQ1W are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS7B8433QDCYRQ1W is usually 5 days.
3.What payment methods are accepted for TPS7B8433QDCYRQ1W?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS7B8433QDCYRQ1W transactions.
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4.How is shipping managed for TPS7B8433QDCYRQ1W?
TPS7B8433QDCYRQ1W orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS7B8433QDCYRQ1W 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 TPS7B8433QDCYRQ1W?
For technical support, including TPS7B8433QDCYRQ1W datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS7B8433QDCYRQ1W requirements.
6.How does Aetrix verify that TPS7B8433QDCYRQ1W is sourced from the original manufacturer or authorized distributors?
All TPS7B8433QDCYRQ1W 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 TPS7B8433QDCYRQ1W meets industry standards.
7.What is the process for return or replacement of TPS7B8433QDCYRQ1W?
All TPS7B8433QDCYRQ1W units undergo pre-shipment inspection (PSI). If there is an issue with TPS7B8433QDCYRQ1W, 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 TPS7B8433QDCYRQ1W part is unused and in its original packaging.
Return procedure for TPS7B8433QDCYRQ1W:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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