CIN1

RFBT

CSS

RFBB

VOUT

Share

Clk

LMZ22010

LOAD

VIN

CIN6

(OPT)

CO3,4

CIN5

(OPT)

+

CIN2,3,4

CO1

(OPT)

CO2

(OPT)

CO5

(OPT)

RSYNC

RENB

RENT

D1

5.1V

(OPT)

LMZ22010

SNVS687H – MARCH 2011 – REVISED AUGUST 2015

www.ti.com

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 LMZ22010 is a step-down DC-to-DC power module. It is typically used to convert a higher DC voltage to a

lower DC voltage with a maximum output current of 10 A. The following design procedure can be used to select

components for the LMZ22010. Alternately, the WEBENCH software may be used to generate complete designs.

When generating a design, the WEBENCH software uses iterative design procedure and accesses

comprehensive databases of components. Please go to www.ti.com for more details.

8.2 Typical Application

Figure 50. Typical Application Schematic Diagram

8.2.1 Design Requirements

For this example the following application parameters exist.

•

VIN Range = Up to 20 V

•

VOUT = 0.8 V to 6 V

•

IOUT = 10 A

8.2.2 Detailed Design Procedure

8.2.2.1 Design Steps

The LMZ22010 is fully supported by WEBENCH which offers: component selection, electrical and thermal

simulations. Additionally, there are both evaluation and demonstration boards that may be used as a starting

point for design. The following list of steps can be used to manually design the LMZ22010 application.

All references to values refer to the typical applications schematic Figure 50.

1. Select minimum operating VIN with enable divider resistors

2. Program VOUT with FB resistor divider selection

3. Select COUT

4. Select CIN

5. Determine module power dissipation

6. Layout PCB for required thermal performance

18

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