The LMR51450 device is an easy-to-use synchronous step-down DC/DC converter capable of driving up to 5 A of load current from a supply voltage ranging from 4 V to 36 V. The LMR51450 provides very high efficiency and output accuracy in a very small solution size. The LMR51450 is capable of delivering 5 A of load current and is peak current mode controlled. The following are additional features that provide both flexible and easy-to-use solutions for a wide range of applications:

• Adjustable switching frequency
• FPWM variant (LMR51450FNDRRR)
• Power-good flag
• Precision enable

Automatic frequency foldback at light load improves efficiency over the entire load range. The device requires few external components and PFM variant integrates Spread Spectrum for optimal EMI. Protection features include the following:

• Thermal shutdown
• Input undervoltage lockout
• Cycle-by-cycle current limiting
• Hiccup short-circuit protection

The LMR51450 device is pin-to-pin compatible with the LMR51440 for easy output current scaling.

For a quick reference, Figure 1-1 shows the pin configuration of the LMR51450 and Figure 1-2 shows the simplified schematic. See the LMR51450 4-V to 36-V, 5-A, Synchronous Step-Down DC/DC Converter Data Sheet for more detailed feature descriptions and design guide.

Figure 1-1 LMR51450 Pin Configuration (Top View)

Figure 1-2 LMR51450 Schematic