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TPS5450QDDARQ1

IC REG BUCK ADJ 5A 8SOPWR

Part Number: TPS5450QDDARQ1

Manufacturer: Texas Instruments

Category: Voltage Regulators - DC DC Switching Regulators

Package: 8-PowerSOIC (0.154", 3.90mm Width)

Datasheet:: TPS5450QDDARQ1.pdf

Description: IC REG BUCK ADJ 5A 8SOPWR

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PRODUCT INFORMATION

Product Details

PRODUCT TECHNICAL REFERENCE

TPS5450QDDARQ1 Automotive 5.5V to 36V, 5A Step-Down DC/DC Converter

A comprehensive technical overview of the TPS5450QDDARQ1, an automotive-grade step-down DC/DC converter from Texas Instruments featuring 5.5-V to 36-V wide input range, 5-A continuous (6-A peak) output current, 500-kHz fixed switching frequency, integrated 110-mΩ high-side N-channel MOSFET, and AEC-Q100 qualification. Covers device function, core features, electrical specifications, 8-lead HSOIC PowerPAD package, pin configuration, typical applications, and replacement selection guidance.

Texas Instruments 8-HSOIC PowerPAD 5.5V to 36V

Device Classification Automotive Step-Down DC/DC Converter

Part Number: TPS5450QDDARQ1

Mounting Type: Surface Mount

Operating Temperature Range: -40°C to +125°C

PRODUCT OVERVIEW

What Is the TPS5450QDDARQ1?

TPS5450QDDARQ1 is an automotive-grade step-down DC/DC converter from Texas Instruments, part of the TPS5450-Q1 family and a member of the SWIFT™ family of DC/DC regulators. The device integrates a low-resistance high-side N-channel MOSFET and is designed to provide a highly efficient, compact power conversion solution for automotive and industrial applications.

The TPS5450QDDARQ1 operates with an input voltage range of 5.5 V to 36 V, making it suitable for various automotive battery configurations and able to withstand load dump scenarios. The device delivers up to 5 A of continuous output current (6 A peak) and features a wide adjustable output voltage range down to 1.22 V with 1.5% initial accuracy.

The device includes a high-performance voltage error amplifier for tight voltage regulation under transient conditions, an undervoltage-lockout (UVLO) circuit to prevent start-up until the input voltage reaches 5.5 V, an internally set slow-start circuit to limit inrush currents, and a voltage feed-forward circuit to improve transient response. To reduce design complexity and external component count, the feedback loop is internally compensated. The TPS5450QDDARQ1 is offered in a thermally enhanced 8-lead HSOIC PowerPAD™ (DDA) package and is rated for operation from –40°C to +125°C junction temperature. The device is AEC-Q100 qualified, RoHS compliant, REACH unaffected, and in active production.

Automotive-Grade Buck Converter AEC-Q100 qualified, 5.5-V to 36-V input, 5-A continuous output current.

High Efficiency & Integrated MOSFET >90% efficiency enabled by 110-mΩ integrated high-side N-channel MOSFET.

Internal Compensation & Protection Internally compensated feedback loop; integrated overcurrent, overvoltage, and thermal shutdown protection.

DEVICE HIGHLIGHTS

Key Features and Benefits of TPS5450QDDARQ1

Wide Input Voltage Range

5.5-V to 36-V input voltage range accommodates automotive 12-V and 24-V battery systems and withstands load dump scenarios.

5-A Continuous Output Current

Delivers up to 5 A of continuous output current (6 A peak) with adjustable output voltage down to 1.22 V and 1.5% initial accuracy.

High Efficiency >90%

High efficiency enabled by 110-mΩ integrated high-side N-channel MOSFET switch, reducing power loss and thermal stress.

Fixed 500-kHz Switching Frequency

Fixed 500-kHz switching frequency allows for small filter size and simplified EMI filtering.

Comprehensive Protection Features

Integrated overcurrent limiting, overvoltage protection, thermal shutdown, and undervoltage lockout ensure robust operation under fault conditions.

Compact HSOIC PowerPAD Package

Available in a thermally enhanced 8-lead HSOIC PowerPAD™ (DDA) package with exposed thermal pad for optimal heat dissipation.

REFERENCE DATA

Technical Specifications for TPS5450QDDARQ1

Part Number	TPS5450QDDARQ1	Manufacturer	Texas Instruments
Device Type	Automotive Step-Down DC/DC Converter	Topology	Buck (Step-Down)
Number of Outputs	1	Output Type	Adjustable
Input Voltage Range	5.5 V to 36 V	Output Voltage Range	1.22 V to 32.04 V
Continuous Output Current	5 A	Peak Output Current	6 A
Switching Frequency	500 kHz (Fixed)	Integrated MOSFET RDS(on)	110 mΩ (High-Side N-Channel)
Voltage Reference Accuracy	1.5% Initial	Synchronous Rectifier	No
Shutdown Supply Current	18 µA (Typical)	Quiescent Current	3 mA
Control Features	Enable, Voltage Feed-Forward, Internal Compensation	Protection Features	Overcurrent Limiting, Overvoltage Protection, Thermal Shutdown, UVLO
Qualification	AEC-Q100 Grade 1	Package / Case	8-PowerSOIC (0.154", 3.90mm Width)
Supplier Device Package	8-HSOIC PowerPAD™ (DDA)	Package Body Size	4.90mm × 3.90mm
Lead Pitch	1.27 mm	Mounting Type	Surface Mount
Operating Temperature (Junction)	-40°C to +125°C	Moisture Sensitivity Level	Level-2-260C-1 YEAR
RoHS	ROHS3 Compliant	REACH Status	REACH Unaffected
Lead Finish / Ball Material	NiPdAuAg	US ECCN	EAR99
Packaging	Tape & Reel (2,500 per Reel)	Product Status	Active
Series	SWIFT™, Automotive, AEC-Q100	Base Product Number	TPS5450

Electrical values shown above are reference values. Test conditions, limits, and guaranteed performance should always be confirmed from the current official manufacturer datasheet before design or production use.

DESIGN REFERENCE

Circuit Considerations for TPS5450QDDARQ1

Power Supply & Key Features

The TPS5450QDDARQ1 requires careful power supply design for optimal performance:

Input Voltage: 5.5 V to 36 V operating range with undervoltage lockout preventing start-up below 5.5 V
Output Voltage Programming: Adjustable down to 1.22 V using an external resistor divider network; 1.5% initial accuracy
Switching Frequency: Fixed 500 kHz for small filter size and simplified filtering
Enable Pin (ENA): Active-high enable; pulling low reduces shutdown supply current to 18 µA typical
Internal Compensation: Feedback loop is internally compensated, reducing design complexity and external component count
Voltage Feed-Forward: Improves line regulation and transient response
Slow-Start: Internally set slow-start circuit limits inrush currents

PCB and Power-Supply Guidance

Converter performance depends on layout and component selection:

Inductor Selection: Inductor values for use with the TPS5450-Q1 are typically in the range of 10 µH to 100 µH
Input Capacitor: Some bulk capacitance may be needed, especially if the input voltage source is distant from the device
Thermal Pad: The exposed PowerPAD on the HSOIC package must be soldered to the PCB for optimal thermal dissipation
Ground Plane: Use a solid ground plane to minimize noise and ensure low-inductance return paths
External Components: The device requires an external Schottky diode for non-synchronous operation
Verify the recommended PCB footprint from the official datasheet prior to production

8-LEAD HSOIC PowerPAD (4.90mm × 3.90mm)

Pin Configuration Reference for TPS5450QDDARQ1

TPS5450

HSOIC PowerPAD TOP VIEW

Confirm package orientation and pin numbering against the official package drawing before PCB layout. The HSOIC PowerPAD (DDA) package has 8 pins with a 4.90mm × 3.90mm body size. The exposed thermal pad must be soldered to the PCB for optimal thermal and electrical performance.

1 BOOT Bootstrap Capacitor - Connect a 0.01-µF capacitor between BOOT and PH to provide gate-drive voltage for the high-side MOSFET

2 VIN Input Supply Voltage - 5.5 V to 36 V; bypass to GND with a low-ESR ceramic capacitor

3 ENA Enable - Active-high enable input; internal pullup; leave open or tie high for normal operation

4 NC No Connect - Not internally connected

5 VSENSE Error Amplifier Inverting Input - Connect to output voltage feedback divider; reference voltage is 1.22 V

6 COMP Compensation - Internal compensation; leave open

7 GND Ground - Power and signal ground return

8 PH Phase Node - Source of the internal high-side power MOSFET; connect to the external inductor and bootstrap capacitor

APPLICATION AREAS

Typical Applications for TPS5450QDDARQ1

Automotive Systems

AEC-Q100 qualified for automotive body electronics, infotainment, and powertrain applications requiring 5-A power delivery.

Point-of-Load Regulation

Provides efficient step-down conversion for local power supplies in distributed power architectures with 5.5-V to 36-V input.

Industrial Power Supplies

Wide input range and 5-A output capability suit industrial automation, motor control, and factory automation systems.

Telecom & Networking Equipment

36-V input capability and 500-kHz switching frequency suit telecom and networking infrastructure applications.

Battery-Powered Systems

18-µA shutdown current and 3-mA quiescent current make this device suitable for battery-powered applications with standby requirements.

Load Dump & Transient Protection

36-V input capability withstands load dump scenarios in automotive 12-V and 24-V battery systems.

REPLACEMENT GUIDANCE

Selecting an Alternative for TPS5450QDDARQ1

A replacement for the TPS5450QDDARQ1 should not be selected solely by product category. The electrical characteristics, package, and pin configuration must be evaluated against the specific circuit requirements. The following alternatives are documented in the official Texas Instruments datasheet and product pages.

Automotive step-down converter with 5-A output

Input voltage range: 5.5 V to 36 V

Output voltage: adjustable down to 1.22 V

Switching frequency: 500 kHz

Package: 8-HSOIC PowerPAD (DDA)

Temperature range: –40°C to 125°C

AEC-Q100 qualification

Integrated 110-mΩ high-side MOSFET

Packaging alternatives (different carrier or package):

Part Number	Package	Carrier	SPQ	Temperature Range
TPS5450QDDARQ1	8-HSOIC PowerPAD (DDA)	Tape & Reel	2,500	-40°C to 125°C
TPS5450DDAR	8-HSOIC PowerPAD (DDA)	Tape & Reel	2,500	-40°C to 125°C
TPS5450QDDARQ1G4	8-HSOIC PowerPAD (DDA)	Tape & Reel	2,500	-40°C to 125°C
TPS5450MDDAREP	8-HSOIC PowerPAD (DDA)	Tape & Reel	2,500	-55°C to 125°C

The TPS5450QDDARQ1 is the automotive-grade (AEC-Q100) tape-and-reel packaged variant in 8-HSOIC PowerPAD (DDA) package (2,500 units per reel). For non-automotive industrial versions, consider TPS5450DDAR. For the same automotive variant under a different ordering option, refer to TPS5450QDDARQ1G4. For enhanced product (EP) versions for defense and aerospace applications with extended temperature range, consider TPS5450MDDAREP. Select based on qualification, package, and temperature requirements.

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MANUFACTURER INFORMATION

Texas Instruments

The TPS5450-Q1 (TPS5450QDDARQ1) belongs to the TPS5450-Q1 family of automotive step-down DC/DC converters from Texas Instruments and is a member of the SWIFT™ family of DC/DC regulators. The device is a high-output-current PWM converter that integrates a low-resistance high-side N-channel MOSFET. The TPS5450-Q1 is AEC-Q100 qualified for automotive applications and meets the rigorous reliability requirements of the automotive industry. The device is available in a thermally enhanced 8-pin HSOIC PowerPAD™ (DDA) package and is widely used in automotive body electronics, infotainment, powertrain, and industrial power supply applications.

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Haishengye Electronics provides electronic component stock supply, BOM sourcing, quotation support, and quality inspection services for TPS5450QDDARQ1 and related devices.

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Technical Information Disclaimer

This technical guide is provided for product identification and preliminary reference only. Electrical limits, package dimensions, pin configuration, product status, and application suitability must be verified using current official manufacturer documentation before design, procurement, or production.

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Specifications

Product Attribute: Attribute Value

Part Number: TPS5450QDDARQ1

Manufacturer: Texas Instruments

Package: 8-PowerSOIC (0.154", 3.90mm Width)

Series: -

Package/Case: 8-PowerSOIC (0.154", 3.90mm Width)

Packaging: Tape & Reel (TR)

Product Status: Active

Function: Step-Down

Output Configuration: Positive

Topology: Buck

Output Type: Adjustable

Number of Outputs: 1

Voltage - Input (Min): 5.5V

Voltage - Input (Max): 36V

Voltage - Output (Min/Fixed): 1.221V

Voltage - Output (Max): 32.04V

Current - Output: 5A

Frequency - Switching: 500kHz

Synchronous Rectifier: No

Operating Temperature: -40°C ~ 125°C (TJ)

Grade: Automotive

Qualification: AEC-Q100

Mounting Type: Surface Mount

Supplier Device Package: 8-SO PowerPad

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TPS5450QDDARQ1 Procurement and Technical Support

TPS5450QDDARQ1 is manufactured by Texas Instruments. This page provides purchasing information including manufacturer, category, package, datasheet, stock reference, price reference and product specifications.

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Part Number: TPS5450QDDARQ1

Manufacturer: Texas Instruments

Package: 8-PowerSOIC (0.154", 3.90mm Width)

Category: Voltage Regulators - DC DC Switching Regulators

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