GND

FB

EN

SW

C1

R3

D1

L1

LM2831

R2

R1

C2

LM2831

SNVS422D – AUGUST 2006 – REVISED SEPTEMBER 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 LM2831 device will operate with input voltage range from 3 V to 5.5 V and provide a regulated output

voltage. This device is optimized for high-efficiency operation with minimum number of external components. For

component selection, see Detailed Design Procedure.

8.2 Typical Applications

8.2.1 LM2831X Design Example 1

8.2.1.1 Design Requirements

The device must be able to operate at any voltage within the recommended operating range. Load current must

be defined to properly size the inductor, input, and output capacitors. Inductor should be able to handle full

expected load current as well as the peak current generated during load transients and start up. Inrush current at

start-up will depend on the output capacitor selection. More details are provided in Detailed Design Procedure.

12

Submit Documentation Feedback

Copyright © 2006–2015, Texas Instruments Incorporated

Product Folder Links: LM2831