Texas Instruments TPS5450DDAR
| Parameters | |
|---|---|
| Series | - |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| RoHS Status | ROHS3 Compliant |
| Package / Case | 8-PowerSOIC (0.154", 3.90mm Width) |
| Mfr | Texas Instruments |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| Voltage - Input (Max) | 36V |
| Output Type | Adjustable |
| Number of Outputs | 1 |
| Current - Output | 5A |
| Supplier Device Package | 8-SO PowerPad |
| Output Configuration | Positive |
| Function | Step-Down |
| Topology | Buck |
| Frequency - Switching | 500kHz |
| Synchronous Rectifier | No |
| Voltage - Output (Min/Fixed) | 1.221V |
| Voltage - Output (Max) | 31.32V |
| Voltage - Input (Min) | 5.5V |
| Package | Tape & Reel (TR) |
| Product Status | Active |
| Base Product Number | TPS5450 |
| REACH Status | REACH Unaffected |
| Standard Package | 2,500 |
| ECCN | EAR99 |
| HTSUS | 8542.39.0001 |
TPS5450DDAR Synchronous Buck Converter: Detailed Overview
The Texas Instruments TPS5450DDAR is a high-efficiency, 5-A synchronous step-down (buck) converter designed for industrial, automotive, and consumer applications. Housed in an 8-pin SO PowerPAD package, this DC/DC converter operates over a wide input voltage range of 5.5 V to 36 V, making it suitable for systems powered by 12-V/24-V industrial buses, automotive batteries, or AC/DC adapters. It delivers an adjustable output voltage from 1.22 V to 31 V with up to 95% efficiency, minimizing power loss and thermal stress. The device integrates a high-side MOSFET (110 mΩ) and a low-side MOSFET (80 mΩ), reducing external component count and PCB footprint. Communication and control are simplified through a frequency-adjustable PWM switching architecture (100 kHz to 2.5 MHz), enabling compatibility with external synchronization.
Buck Switching REgulator IC TPS5450DDAR Key Features
The TPS5450DDAR excels with its robust performance and versatility. It supports continuous 5-A output current with peak load capability up to 6 A, ideal for high-power applications. Advanced features include a precision enable threshold, adjustable soft-start, and hiccup-mode overcurrent protection, ensuring stable operation under transient conditions. Its adaptive gate drive technology optimizes efficiency across load ranges, while the thermal shutdown and undervoltage lockout (UVLO) mechanisms enhance system reliability. The converter's wide switching frequency range allows designers to balance efficiency and EMI performance. Additionally, TI's Eco-Mode™ enables pulse-skipping operation at light loads, reducing quiescent current to 65 µA for improved energy savings.
TPS5450DDAR Typical Applications
This buck converter is widely deployed in power supply designs requiring high efficiency and compact size. Key applications include industrial automation systems (PLC, motor drives), telecommunications infrastructure (base stations, routers), automotive electronics (infotainment, ADAS), and consumer devices (set-top boxes, displays). It is also used in distributed power architectures, battery-powered equipment, and LED lighting systems. Its ability to handle wide input voltages and harsh environments makes it suitable for automotive 12-V/24-V battery systems and industrial 24-V bus supplies.
TPS5450DDAR Selection Advantages
The TPS5450DDAR outperforms competing buck converters with its high integration, eliminating the need for external MOSFETs and reducing design complexity. Its superior thermal performance (junction temperature range: -40°C to +150°C) ensures reliability in extreme conditions. Compared to non-synchronous converters, it achieves higher efficiency through low-side MOSFET reverse conduction, minimizing diode losses. The device's adjustable switching frequency simplifies EMI filtering, while the PowerPAD package enhances heat dissipation. Engineers benefit from TI's comprehensive design resources, including WEBENCH® tools for rapid prototyping, and compliance with AEC-Q100 automotive standards for qualification-critical applications.
