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Texas Instruments TPS7B8450QDCYRQ1M3
- Part No.:
- TPS7B8450QDCYRQ1M3
- Manufacturer:
- Texas Instruments
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
TPS7B8450QDCYRQ1M3.pdf
- Description:
- AUTOMOTIVE 150-MA, 40-V, LOW-DRO
- Quantity:
- Payment:
- Shipping:
Inventory:6,392
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Product details
Overview
TPS7B8450QDCYRQ1M3 from Texas Instruments is an AEC-Q100 Grade 1 automotive LDO regulator delivering up to 150mA output current with ±0.75% DC accuracy, 225mV max dropout at 150mA (VOUT ≥ 3.3V), and 18µA typical quiescent current - designed for always-on battery-connected systems such as automotive gateways and remote keyless entry modules.
For engineers reviewing the TPS7B8450QDCYRQ1M3 datasheet, TPS7B8450QDCYRQ1M3 pinout, TPS7B8450QDCYRQ1M3 application, or TPS7B8450QDCYRQ1M3 equivalent, this page provides verified technical context, package-specific thermal data, cold-crank transient response metrics, functional safety documentation support, and validated alternative parts for automotive power rail design.
Technical Context
The TPS7B8450QDCYRQ1M3 implements a precision bandgap reference with UVLO (2.6V rising, 2.5V falling) and thermal shutdown (175°C trip, 20°C hysteresis), enabling robust operation across –40°C to +125°C ambient and –40°C to +150°C junction temperature ranges. Its brickwall current limit (180–260mA) and fast load transient recovery (<100µs) ensure stability during microcontroller wake-up events.
It supports both fixed (3.3V/5V) and adjustable (1.2V–18V) outputs via FB pin, with feedback voltage fixed at 0.65V ±5mV and input voltage range of 3V–40V (42V absolute max). The architecture minimizes overshoot during dropout recovery and maintains ±2% VOUT deviation under 3V/µs VIN slew rate during cold-crank conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output current | Up to 150mA - sufficient to power automotive MCUs, CAN transceivers, and SiC gate drivers without external boost stages. |
| Input voltage range | 3V to 40V (42V absolute max) - withstands automotive load dump transients and operates directly from 12V/24V battery rails. |
| Output voltage accuracy | ±0.75% over line, load, and temperature - ensures stable biasing for precision analog sensors and ADC references. |
| Dropout voltage | 225mV max at 150mA (VOUT ≥ 3.3V) - enables high-efficiency regulation even at low VIN–VOUT differentials in start-stop systems. |
| Quiescent current | 18µA typical, 4µA max when disabled - meets ultra-low-power requirements for always-on vehicle modules with multi-year battery life. |
| Thermal resistance | RθJA = 85.5°C/W (DCY package) - requires minimal PCB copper area for thermal management in space-constrained SOT-223 layouts. |
| Stability capacitor | Stable with ≥2.2µF ceramic output capacitor - eliminates need for large electrolytic capacitors and simplifies EMI filtering. |
Pinout & Package
SOT-223-4 (DCY) package: 6.5mm × 7mm footprint with exposed thermal pad soldered to GND plane for optimal heat dissipation and low RθJB (11.3°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: IN | Unregulated input supply | Accepts 3V–40V; requires ≥0.1µF ceramic capacitor placed adjacent to pin for EMI suppression and transient immunity. |
| 2: EN | Active-high enable control | Drives >2V to enable; <0.7V to disable; must not float - internal high-impedance node requiring pull-up or MCU GPIO control. |
| 3: OUT | Regulated output voltage | Delivers up to 150mA; requires ≥2.2µF ceramic capacitor to ground for stability and transient response optimization. |
| 4: GND | Power and thermal reference | Must connect to PCB ground plane and thermal pad; primary path for heat transfer and noise return in automotive EMI environments. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation - certified for front-end automotive electronics including instrument clusters and BCMs. |
| Functional Safety-Capable documentation | TI-provided FIT rate, failure mode analysis, and diagnostic coverage reports - accelerates ISO 26262 ASIL-B system-level certification. |
| Ultra-low quiescent current | 18µA typical at light load - extends battery runtime in always-on RKE and telematics modules during vehicle sleep modes. |
| Cold-crank transient immunity | ±2% VOUT deviation during 3V/µs VIN slew rate - maintains MCU and CAN bus operation during engine cranking below 6V battery voltage. |
| Adjustable/fixed dual-mode output | 1.2V–18V adjustable via FB resistor divider or factory-fixed 3.3V/5V options - supports flexible BOM consolidation across multiple vehicle platforms. |
Applications
| Automotive Gateway Power Rail | Body Control Module (BCM) Core Supply |
|---|---|
Use Scenario: Powers ARM-based gateway SoCs and dual-CAN FD interfaces in Zonal E/E architectures with continuous 12V battery connection. IC Role / Device Role / Timing Role: Primary LDO supplying 3.3V core logic and 5V I/O rails; handles load dump (42V) and cold-crank (4.5V) without reset. Use Value: 18µA IQ prevents parasitic drain; ±0.75% accuracy ensures reliable CAN transceiver timing; 225mV dropout sustains operation down to 3.525V input. |
Use Scenario: Supplies microcontroller, LIN transceivers, and LED drivers in door module and lighting control units. IC Role / Device Role / Timing Role: Always-on 5V regulator enabling fast wake-from-sleep response; integrated UVLO prevents brownout resets during ignition cycling. Use Value: 85.5°C/W RθJA allows compact SOT-223 layout; ±2% cold-crank response avoids MCU lockup; 2.2µF stability enables small 0805 ceramic cap placement. |
| Remote Keyless Entry (RKE) Transmitter | Reconfigurable Digital Instrument Cluster |
Use Scenario: Powers sub-GHz RF transmitter IC and secure authentication MCU in passive entry fobs with coin-cell or supercap backup. IC Role / Device Role / Timing Role: Low-IQ LDO generating 3.3V for RF PA bias and crypto processor - enabled only during button press via EN pin. Use Value: 4µA shutdown current extends fob battery life beyond 5 years; 150mA peak supports burst-mode RF transmission; 0.65V FB reference enables precise voltage scaling. |
Use Scenario: Supplies reprogrammable display controller, touch interface, and graphics accelerator in software-defined instrument panels. IC Role / Device Role / Timing Role: Adjustable 1.8V–1.2V LDO for DDR memory termination and GPU core voltage - dynamically tuned via MCU-controlled resistor network. Use Value: 1.2V–18V output range covers LPDDR4 I/O (1.1V) and display backlight drivers (12V); ±0.75% accuracy ensures pixel clock stability across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7B8433QDCYRQ1 | Fixed 3.3V output; identical DCY package, thermal performance, and AEC-Q100 Grade 1 rating. | No external resistor divider needed; eliminates FB trace routing and component count for 3.3V-only designs. | Select when output voltage is fixed at 3.3V and board space is constrained - same footprint, no layout change required. |
| NCP163ASN330T2G | Non-automotive grade; 150mA, 3.3V fixed, 250mV dropout, 30µA IQ; SOT-23-5 package. | Lacks AEC-Q100 qualification, thermal shutdown hysteresis, and cold-crank transient specs - unsuitable for safety-critical zones. | Consider only for non-automotive industrial prototypes where cost outweighs qualification requirements and thermal margin is ample. |
Compared with TPS7B8450QDCYRQ1M3, the TPS7B8433QDCYRQ1 offers identical automotive reliability with simplified 3.3V implementation, while the NCP163ASN330T2G trades qualification and transient performance for lower unit cost in non-automotive contexts.
Availability
TPS7B8450QDCYRQ1M3 is available at Aetrix Electronics and suitable for automotive gateways, body control modules, and remote keyless entry systems requiring stable component supply with full AEC-Q100 compliance and functional safety documentation.
Supply support for TPS7B8450QDCYRQ1M3 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 and embedded processing technologies, with deep expertise in automotive-grade power management ICs.
The TPS7B84-Q1 product line was engineered specifically for battery-connected automotive subsystems demanding ultra-low IQ, high-voltage tolerance, and ASIL-ready functional safety support - targeting zonal controllers, domain ECUs, and always-on security modules.
FAQ
What is the maximum input voltage rating for the TPS7B8450QDCYRQ1M3?
The TPS7B8450QDCYRQ1M3 has an absolute maximum input voltage of 42V, with recommended operating range from 3V to 40V. This allows it to survive automotive load dump events while maintaining regulation down to 3V - critical for cold-crank operation in 12V systems. Exceeding 42V risks permanent damage per the Absolute Maximum Ratings table.
Does the TPS7B8450QDCYRQ1M3 support adjustable output voltage?
Yes, the TPS7B8450QDCYRQ1M3 supports adjustable output from 1.2V to 18V using an external resistor divider connected to the FB pin, with a precise 0.65V ±5mV feedback reference. This enables flexible voltage scaling for diverse loads like SiC gate drivers (12V) or low-power MCUs (1.2V), unlike fixed-output variants such as TPS7B8433QDCYRQ1.
What thermal performance can be expected from the TPS7B8450QDCYRQ1M3 in its SOT-223 package?
The TPS7B8450QDCYRQ1M3 in the DCY (SOT-223-4) package has RθJA = 85.5°C/W and RθJB = 11.3°C/W. With proper thermal pad soldering to a 2-oz copper ground plane, it sustains 150mA output at 125°C ambient when dropping 10V - delivering ~1.5W dissipation before reaching 150°C junction limit. Layout guidance is provided in Section 7.4 of the datasheet.
How does the TPS7B8450QDCYRQ1M3 handle cold-crank conditions?
The TPS7B8450QDCYRQ1M3 maintains ±2% output voltage deviation during cold-crank transients with 3V/µs input slew rate and recovers within 100µs after load steps. Its novel architecture minimizes overshoot during dropout recovery, ensuring uninterrupted operation of CAN transceivers and microcontrollers when battery voltage dips to 4.5V during engine start.
Is functional safety documentation available for the TPS7B8450QDCYRQ1M3?
Yes, Texas Instruments provides functional safety documentation for the TPS7B8450QDCYRQ1M3, including FIT rate calculations, failure mode effects analysis (FMEA), and diagnostic coverage reports - all accessible via TI's functional safety portal. These materials support ISO 26262 ASIL-B system-level development for automotive gateway and BCM applications.
TPS7B8450QDCYRQ1M3 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
TPS7B8450QDCYRQ1M3 FAQ
1.How can I place an order for TPS7B8450QDCYRQ1M3 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS7B8450QDCYRQ1M3 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 TPS7B8450QDCYRQ1M3 reliable?
The price and inventory of TPS7B8450QDCYRQ1M3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS7B8450QDCYRQ1M3 is usually 5 days.
3.What payment methods are accepted for TPS7B8450QDCYRQ1M3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS7B8450QDCYRQ1M3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS7B8450QDCYRQ1M3?
TPS7B8450QDCYRQ1M3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS7B8450QDCYRQ1M3 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 TPS7B8450QDCYRQ1M3?
For technical support, including TPS7B8450QDCYRQ1M3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS7B8450QDCYRQ1M3 requirements.
6.How does Aetrix verify that TPS7B8450QDCYRQ1M3 is sourced from the original manufacturer or authorized distributors?
All TPS7B8450QDCYRQ1M3 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 TPS7B8450QDCYRQ1M3 meets industry standards.
7.What is the process for return or replacement of TPS7B8450QDCYRQ1M3?
All TPS7B8450QDCYRQ1M3 units undergo pre-shipment inspection (PSI). If there is an issue with TPS7B8450QDCYRQ1M3, 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 TPS7B8450QDCYRQ1M3 part is unused and in its original packaging.
Return procedure for TPS7B8450QDCYRQ1M3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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