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TPS5430

TITPS5430

Texas Instruments
A 3 A synchronous buck regulator from TI commonly used for mid-voltage step-down applications.
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Overview

The TPS5430 is a 3 A, 500 kHz synchronous buck regulator from Texas Instruments, designed for efficient step-down conversion in various power supply applications. It operates from a 5.5 V to 36 V input and can provide an adjustable output voltage down to 1.22 V. Its integrated features simplify design and enhance reliability.

Why Choose This Part

Engineers benefit from the TPS5430's integrated synchronous rectification, which improves efficiency without requiring an external Schottky diode. The 500 kHz switching frequency allows for smaller external inductor and capacitor sizes. Its array of protection features, including overcurrent limiting, overvoltage protection, and thermal shutdown, enhances system robustness.

Applications

Industrial Power Supplies
Providing regulated power to industrial control systems and sensors requiring up to 3A current from a common higher voltage rail.
Distributed Power Systems
Step-down regulation in systems where power is distributed at a higher voltage and locally converted to lower voltages for various sub-circuits.
General Purpose DC/DC Conversion
Versatile use in any application needing efficient DC-DC step-down conversion with up to 3A output current and a 500kHz switching frequency.
Consumer Electronics
Powering various subsystems in consumer devices that operate from battery packs or AC adapters, needing efficient voltage reduction.
Automotive Infotainment
Suitable for non-critical automotive applications where a stable 3A power rail is needed for infotainment or auxiliary systems, operating within the specified temperature range.

Key Specifications

Function Step-Down
Topology Buck
Output Type Adjustable
Mounting Type Surface Mount
Package / Case 8-PowerSOIC (0.154", 3.90mm Width)
Current - Output 3A
Number of Outputs 1
Output Configuration Positive
Frequency - Switching 500kHz
Operating Temperature -40degC ~ 125degC (TJ)
Synchronous Rectifier No
Voltage - Input (Max) 36V
Voltage - Input (Min) 5.5V
Voltage - Output (Max) 32.04V
Supplier Device Package 8-SO PowerPad
Voltage - Output (Min/Fixed) 1.221V

Getting Started

To get started with the TPS5430, designers typically refer to the comprehensive datasheet for schematic examples and component selection guidelines. Texas Instruments provides design tools like WEBENCH Power Designer, which can assist in creating a custom power supply design. Prototyping can be done on a breadboard with appropriate power planes or a custom PCB following the PowerPAD layout recommendations.

Also Consider

LM2596S-ADJ TITexas Instruments - This is a non-synchronous buck converter with similar output current capability and a wider input voltage range, offering a cost-effective alternative for less efficiency-critical applications.
MP1584 Monolithic Power Systems - This is a small, highly integrated buck converter with a higher switching frequency and lower current, suitable for space-constrained designs with slightly lower power requirements.
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