VIN

SW

FB

MODE

EN

GND

L

V

I

C

I

TPS6262x

C

O

V

O

TPS62620, TPS62621, TPS62622

TPS62623, TPS62624, TPS62625

SLVS848D – JULY 2009 – REVISED OCTOBER 2015

www.ti.com

9 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.

9.1 Application Information

The TPS6262x device family provides high-frequency synchronous step-down DC/DC converters optimized for

battery-powered portable applications. Intended for low-power applications, the TPS6262x devices support up to

600 mA load current, and allow the use of low cost chip inductor and capacitors.

9.2 Typical Application

Figure 5. TPS6262x Typical Application Schematic

9.2.1 Design Requirements

The design guideline provides a component selection to operate the device within the recommended operating

conditions.

Table 1 shows the list of components for the Application Curves.

Table 1. List of Components

REFERENCE

DESCRIPTION

MANUFACTURER

L

1

μH

MURATA LQM21PN1R0NGR

2.2

μF, 6.3V, 0402, X5R

MURATA GRM155R60J225ME15

4.7

μF, 6.3V, 0402, X5R

MURATA GRM155R60J475M

9.2.2 Detailed Design Procedure

9.2.2.1 Inductor Selection

The TPS6262x device family of step-down converters have been optimized to operate with an effective

inductance value in the range of 0.3

μH to 1.3 μH and with output capacitors in the range of 4.7 μF to 10 μF. The

internal compensation is optimized to operate with an output filter of L = 0.47

smaller inductor values can be used to optimize the performance of the device for specific operation conditions.

For more details, see section Checking Loop Stability.

The inductor value affects its peak-to-peak ripple current, the PWM-to-PFM transition point, the output voltage

ripple and the efficiency. The selected inductor has to be rated for its DC resistance and saturation current. The

inductor ripple current (

10

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