LM5116

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SNVS499H – FEBRUARY 2007 – REVISED JULY 2015

8 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

8.1 Application Information

The LM5116 device is a step-down DC-DC controller. The device is typically used to convert a higher DC-DC

voltage to a lower DC voltage. Use the following design procedure to select component values. Alternately, use

the WEBENCH® software to generate a complete design. The WEBENCH software uses an iterative design

procedure and assesses a comprehensive database of components when generating a design.

8.2 Typical Application

Figure 33. 5-V 7-A Typical Application Schematic

8.2.1 Design Requirements

The procedure for calculating the external components is illustrated with the following design example. The Bill of

Materials for this design is listed in Table 1. The circuit shown in Figure 33 is configured for the following

specifications:

•

Output voltage = 5 V

•

Input voltage = 7 V to 60 V

•

Maximum load current = 7 A

•

Switching frequency = 250 kHz

Simplified equations are used as a general guideline for the design method. See Comprehensive Equations.

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