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TPS54240DGQR

TITPS54240DGQR

Texas Instruments
Buck, Split Rail Switching Regulator IC Positive Adjustable 0.8V 1 Output 2.5A 10-PowerTFSOP, 10-MSOP (0.118", 3.00mm Width)
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Overview

The TPS54240DGQR is a 42V, 2.5A step-down regulator featuring an integrated high-side MOSFET and Eco-Mode for high efficiency at light loads. It supports a wide input voltage range from 3.5V to 42V and an adjustable switching frequency up to 2.5MHz, allowing for a balance between component size and power efficiency. This buck converter is particularly suited for industrial applications requiring a robust input voltage range and precise power sequencing.

Why Choose This Part

The device features a high 42V input rating to handle industrial transients and an adjustable slow start to manage inrush current. Its wide switching frequency range from 100kHz to 2.5MHz enables the use of smaller inductors, while the 1.3uA shutdown current is ideal for battery-backed systems.

Applications

Industrial Control Systems
Regulates 24V DC bus rails down to low-voltage logic levels for PLCs and industrial automation equipment.
Fleet Management
Powering GSM and GPRS modules in vehicle tracking systems where wide input transients are common.
Smart Metering
Provides efficient power conversion for eMeters and security systems utilizing its low shutdown current.
Distributed Power Systems
Acts as an intermediate stage buck converter for high-voltage distributed power architectures.

Key Specifications

Function Step-Down
Topology Buck, Split Rail
Output Type Adjustable
Mounting Type Surface Mount
Package / Case 10-PowerTFSOP, 10-MSOP (0.118", 3.00mm Width)
Current - Output 2.5A
Number of Outputs 1
Output Configuration Positive
Frequency - Switching 100kHz ~ 2.5MHz
Operating Temperature -40degC ~ 150degC (TJ)
Synchronous Rectifier No
Voltage - Input (Max) 42V
Voltage - Input (Min) 3.5V
Voltage - Output (Max) 39V
Supplier Device Package 10-HVSSOP
Voltage - Output (Min/Fixed) 0.8V

Getting Started

For rapid prototyping, use the TPS54240EVM evaluation module to verify thermal performance and efficiency. Ensure the exposed thermal pad of the 10-PowerTFSOP package is soldered to a large ground plane to manage heat dissipation at 2.5A loads. TI WEBENCH Power Designer can be used to calculate external compensation components and inductor values for specific output voltages.

Also Consider

TPS54340 TITexas Instruments - Higher 3.5A output current capability with a similar 42V input range for more demanding loads.

Categories

Power Management > Switching Regulators