LM5145RGYT - Texas Instruments

Manufacturer Part Number

LM5145RGYT

Manufacturer

Texas Instruments

Introduction

The LM5145RGYT is a highly efficient, monolithic synchronous step-down DC DC switching controller designed for a wide range of power management applications.

Product Features and Performance

Monolithic integration for system compactness

Synchronous rectification for better efficiency

Wide input voltage range from 6V to 75V

Supports high switching frequency from 100kHz to 1MHz

Adjustable duty cycle up to 100%

Buck topology provides step-down voltage conversion

Single output phase for simplified design

High-temperature operational range from -40°C to 125°C

Soft Start functionality to reduce inrush current

Power Good indicator for system monitoring

Frequency Control for controlled switching frequencies

Enable feature for power sequence control

Product Advantages

Highly integrated solution reduces BOM and simplifies design

Supports synchronous buck operation to minimize power loss

Flexible switching frequency allows optimization for efficiency and component size

Integrated features like soft start and power good reduce external component requirements

Highly rugged with wettable flanks for easy inspection

Key Technical Parameters

Voltage Supply (Vcc/Vdd): 6V ~ 75V

Output Type: Transistor Driver

Function: Step-Down

Topology: Buck

Number of Outputs: 1

Output Configuration: Positive

Frequency - Switching: 100kHz ~ 1MHz

Duty Cycle (Max): 100%

Synchronous Rectifier: Yes

Clock Sync: Yes

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

Mounting Type: Surface Mount, Wettable Flank

Package/Case: 20-VFQFN Exposed Pad

Supplier Device Package: 20-VQFN (3.5x4.5)

Quality and Safety Features

Wide input voltage range ensures stability under varying input conditions

Thermal shutdown and overcurrent protection for reliable operation

Exposed pad package enhances thermal dissipation

Compatibility

Compatible with a variety of capacitors and inductors allowing flexible design options

Suitable for surface mount technology (SMT) assembly

Application Areas

Telecommunications

Industrial power systems

Automotive applications

Data center power supplies

Portable electronics

Product Lifecycle

Active product status indicates ongoing availability; not near discontinuation

Replacements or upgrades should be available given the active status of the product

Several Key Reasons to Choose This Product

Robust design suitable for harsh environments in industrial and automotive applications

Customizable switching frequency for design flexibility

High efficiency reduces system heat and increases reliability

Texas Instruments' reputable quality and support

Compatibility with a range of external components simplifies design considerations

Advanced packaging suitable for automated SMT processes