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Texas Instruments TPS7B8350QDCYRQ1M3
- Part No.:
- TPS7B8350QDCYRQ1M3
- Manufacturer:
- Texas Instruments
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
TPS7B8350QDCYRQ1M3.pdf
- Description:
- IC REG LIN POS 5V 150MA SOT223
- Quantity:
- Payment:
- Shipping:
Inventory:1,681
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Product details
Overview
TPS7B8350QDCYRQ1M3 from Texas Instruments is an AEC-Q100 Grade 1 automotive-grade low-dropout linear regulator (LDO) delivering fixed 5 V output at up to 150 mA. It operates from 3 V to 40 V input, features ±1% DC accuracy over line/load/temperature, 230 mV max dropout at 150 mA, and 18 µA typical quiescent current - enabling reliable always-on power for battery-connected ECUs in cold-crank and load-dump conditions.
For engineers reviewing the TPS7B8350QDCYRQ1M3 datasheet, TPS7B8350QDCYRQ1M3 pinout, TPS7B8350QDCYRQ1M3 application, or TPS7B8350QDCYRQ1M3 equivalent, this page delivers verified electrical specs, validated SOT-223-3 pin mapping, automotive thermal and UVLO behavior, and real-world transient response data for instrument cluster, BCM, and gateway subsystem design.
Technical Context
The TPS7B8350QDCYRQ1M3 implements a PMOS pass transistor architecture with integrated undervoltage lockout (UVLO: 2.6–2.82 V rising, 2.38–2.6 V falling), thermal shutdown (175°C trip, 20°C hysteresis), and brickwall current limiting (180–260 mA). Its control loop is optimized for fast line transient recovery - maintaining ±2% VOUT deviation during 1-V/µs VIN slew and cold-crank events.
Stability is guaranteed with ≥2.2 µF ceramic output capacitance (ESR 1 mΩ–2 Ω); no external compensation is required. The device achieves 55 dB PSRR at 1 kHz (VIN–VOUT = 500 mV, IOUT = 150 mA) and 280 µVRMS output noise (10 Hz–100 kHz, VOUT = 3.3 V), confirming suitability for noise-sensitive MCU and CAN transceiver rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±1% (max) over –40°C to +125°C ambient, ensuring stable MCU core voltage under automotive thermal stress. |
| Input Voltage Range | 3 V to 40 V (42 V absolute max), enabling direct battery connection and survival through ISO 7637-2 load dump transients. |
| Max Output Current | 150 mA continuous, sufficient to power multiple low-power automotive peripherals (e.g., RKE microcontroller + CAN FD transceiver). |
| Dropout Voltage | 230 mV (max) at 150 mA and VOUT ≥ 3.3 V, allowing regulation down to VIN = 5.23 V - critical for cold-crank operation (6 V battery minimum). |
| Quiescent Current | 18 µA (typ) at no load, minimizing standby power loss in always-on gateways and reducing battery drain during vehicle sleep mode. |
| Line Transient Response | ±2% VOUT deviation during cold-crank (1-V/µs VIN slew), preventing brownout resets in instrument clusters during engine start. |
| Thermal Protection | Junction shutdown at 175°C with 20°C hysteresis, preventing permanent damage during sustained overload or poor PCB heatsinking. |
Pinout & Package
TPS7B8350QDCYRQ1M3 uses the 3-pin SOT-223 (DCY) package (6.50 mm × 3.50 mm body), with pins 2 and 4 internally connected to GND and thermally tied to the exposed thermal pad - requiring low-impedance PCB copper pour for optimal thermal performance (RθJB = 11.7°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Unregulated input supply | Accepts 3–40 V; requires ≥0.1 µF ceramic capacitor close to pin to suppress EMI and improve PSRR. |
| 2 (GND) | Ground reference & thermal path | Primary ground return; must be soldered to large PCB thermal pad to maintain TJ ≤ 150°C at full load. |
| 3 (OUT) | Regulated 5 V output | Delivers stable 5 V to downstream loads; requires ≥2.2 µF ceramic capacitor (X5R/X7R) for stability and transient response. |
| 4 (GND) | Secondary ground & thermal path | Redundant GND terminal tied to same internal node as Pin 2; enhances thermal conduction and reduces ground impedance. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation and 150°C junction temperature - meets automotive ECU reliability requirements. |
| Functional Safety-Capable documentation | TI provides FIT rate, failure mode analysis, and diagnostic coverage reports to accelerate ISO 26262 ASIL-B system certification. |
| Ultra-low quiescent current | 18 µA typ enables >1-year battery life in remote keyless entry (RKE) modules operating from 12 V lead-acid batteries. |
| Robust UVLO with hysteresis | 230 mV hysteresis prevents oscillation during slow-rising battery voltages (e.g., after jump-start), ensuring clean power-up sequencing. |
| Stable with small ceramic capacitors | Guaranteed stability with 2.2 µF X7R output cap eliminates need for bulky tantalum or electrolytic capacitors - reducing BOM cost and board area. |
Applications
| Reconfigurable Instrument Clusters | Body Control Modules (BCM) |
|---|---|
|
Use Scenario: Digital gauge cluster powered directly from vehicle battery, requiring uninterrupted 5 V supply during engine cranking (cold-crank down to 6 V) and load dump (up to 42 V). IC Role / Device Role / Timing Role: Primary 5 V LDO supplying microcontroller, display driver, and CAN FD transceiver - maintaining regulation across wide VIN transients. Use Value: ±2% VOUT deviation during 1-V/µs line transients prevents MCU reset and ensures seamless UI rendering during start-stop cycles. |
Use Scenario: Centralized BCM managing door locks, lighting, and window controls, operating 24/7 in sleep mode with <20 µA total system quiescent current. IC Role / Device Role / Timing Role: Always-on 5 V rail generator for low-power wake-up logic and CAN bus monitoring circuitry. Use Value: 18 µA IQ minimizes parasitic drain, extending parked vehicle battery life beyond 30 days without recharge. |
| Automotive Gateways | Remote Keyless Entry (RKE) |
|
Use Scenario: Zonal gateway aggregating Ethernet, CAN FD, and LIN traffic, requiring fault-tolerant 5 V supply for communication processors and security accelerators. IC Role / Device Role / Timing Role: Secondary regulated rail isolated from main domain controller, supporting functional safety partitioning. Use Value: Thermal shutdown (175°C) and current limit (220 mA typ) prevent cascade failures during short-circuit faults on connected sub-buses. |
Use Scenario: Compact RKE fob with ultra-low-power MCU and sub-GHz RF transmitter, powered by CR2032 coin cell or small Li-ion battery. IC Role / Device Role / Timing Role: Voltage translator boosting battery voltage to stable 5 V for RF PA bias and digital logic. Use Value: 2.6 V UVLO rising threshold ensures reliable turn-on even as battery depletes to 2.8 V, maximizing usable cell capacity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7B8150QDCYRQ1 | Same SOT-223-3 package and 5 V output, but higher IQ (25 µA typ) and lower current limit (120 mA max). | Lacks functional safety documentation and has reduced PSRR (48 dB @ 1 kHz), limiting use in ASIL-B systems. | Select when functional safety compliance is not required and cost is prioritized over transient performance. |
| NCP163ASN500T2G | 5 V fixed output, 150 mA, but only AEC-Q200 qualified (not Q100), wider temp range (–40°C to +150°C), and higher dropout (300 mV @ 150 mA). | No automotive-grade UVLO or thermal shutdown hysteresis; unsuitable for cold-crank or load-dump environments. | Consider only for non-safety-critical body electronics where extended temperature range outweighs transient robustness needs. |
Compared with TPS7B8350QDCYRQ1M3, TPS7B8150QDCYRQ1 trades functional safety support and tighter transient response for lower unit cost, while NCP163ASN500T2G offers broader junction temperature tolerance but lacks automotive transient immunity and safety documentation - making TPS7B8350QDCYRQ1M3 the optimal choice for ASIL-B-compliant gateways and instrument clusters.
Availability
TPS7B8350QDCYRQ1M3 is available at Aetrix Electronics and suitable for automotive instrument clusters, body control modules, and always-on gateways requiring stable component supply across extended temperature and high-reliability automotive lifecycles.
Supply support for TPS7B8350QDCYRQ1M3 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 AEC-Q100 process validation.
The TPS7B83-Q1 product line was designed specifically for battery-connected automotive subsystems - delivering ultra-low IQ, high-voltage tolerance, and functional safety support to enable next-generation zonal architectures and always-on ECU designs.
FAQ
What is the maximum input voltage rating for TPS7B8350QDCYRQ1M3?
The TPS7B8350QDCYRQ1M3 has an absolute maximum input voltage of 42 V, with recommended operation up to 40 V. This rating allows it to withstand ISO 7637-2 load dump transients common in 12 V automotive systems, ensuring reliable operation without external protection circuitry. The device maintains regulation down to 3 V input, supporting cold-crank scenarios.
Does TPS7B8350QDCYRQ1M3 require an external enable signal?
No, the TPS7B8350QDCYRQ1M3 does not include an enable (EN) pin - it operates continuously when input voltage exceeds the UVLO rising threshold (2.6–2.82 V). This simplifies design for always-on applications like gateways and RKE modules, eliminating the need for external wake-up logic or microcontroller-controlled power sequencing.
What output capacitor value is required for stable operation of TPS7B8350QDCYRQ1M3?
The TPS7B8350QDCYRQ1M3 requires a minimum 2.2 µF ceramic output capacitor (X5R or X7R dielectric) with ESR between 1 mΩ and 2 Ω for guaranteed stability. TI validates performance up to 220 µF; larger values improve transient response but require verification against startup inrush and thermal limits. A 10 µF X7R capacitor is commonly used for optimal balance of size and performance.
How does TPS7B8350QDCYRQ1M3 handle cold-crank conditions?
The TPS7B8350QDCYRQ1M3 maintains ±2% output voltage deviation during cold-crank events with 1-V/µs input voltage slew rates, thanks to its high-bandwidth error amplifier and optimized pass transistor drive. This ensures uninterrupted operation of connected MCUs and CAN transceivers when battery voltage dips to 6 V during engine start - a critical requirement for instrument clusters and ADAS domains.
Is TPS7B8350QDCYRQ1M3 compatible with lead-free PCB assembly processes?
Yes, TPS7B8350QDCYRQ1M3 is RoHS-compliant and qualified for standard lead-free reflow profiles (J-STD-020, peak temperature 260°C). Its SOT-223-3 (DCY) package uses matte tin plating and supports both solder paste printing and reflow soldering. TI specifies MSL-3 moisture sensitivity, requiring bake-out if exposed to ambient >30°C/60% RH for >168 hours before assembly.
TPS7B8350QDCYRQ1M3 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):
- 5V
- 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, Reverse Current, 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
TPS7B8350QDCYRQ1M3 FAQ
1.How can I place an order for TPS7B8350QDCYRQ1M3 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS7B8350QDCYRQ1M3 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 TPS7B8350QDCYRQ1M3 reliable?
The price and inventory of TPS7B8350QDCYRQ1M3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS7B8350QDCYRQ1M3 is usually 5 days.
3.What payment methods are accepted for TPS7B8350QDCYRQ1M3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS7B8350QDCYRQ1M3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS7B8350QDCYRQ1M3?
TPS7B8350QDCYRQ1M3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS7B8350QDCYRQ1M3 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 TPS7B8350QDCYRQ1M3?
For technical support, including TPS7B8350QDCYRQ1M3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS7B8350QDCYRQ1M3 requirements.
6.How does Aetrix verify that TPS7B8350QDCYRQ1M3 is sourced from the original manufacturer or authorized distributors?
All TPS7B8350QDCYRQ1M3 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 TPS7B8350QDCYRQ1M3 meets industry standards.
7.What is the process for return or replacement of TPS7B8350QDCYRQ1M3?
All TPS7B8350QDCYRQ1M3 units undergo pre-shipment inspection (PSI). If there is an issue with TPS7B8350QDCYRQ1M3, 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 TPS7B8350QDCYRQ1M3 part is unused and in its original packaging.
Return procedure for TPS7B8350QDCYRQ1M3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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