Inductor Selection

L

V

OUT

V

V

IN1

f

0.3 A

(3)

L

V

in2

V

V

OUT

f

0.3 A

(4)

I

I

OUT

0.8 )

V

2

V

IN1

f

L

(5)

I

V

OUT

I

OUT

0.8

V

IN2

)

V

IN2

V

2

V

OUT

f

L

(6)

Capacitor Selection

Input Capacitor

TPS63000-Q1

To properly configure the TPS63000 devices, an inductor must be connected between pin L1 and pin L2. To

estimate the inductance value Equation 3 and Equation 4 can be used.

a Li-Ion battery with a battery voltage range from 2.5 V up to 4.2 V is 2.2

µH. The recommended inductor value

range is between 1.5

µH and 4.7 µH. In general, this means that at high voltage conversion rates, higher inductor

values offer better performance.

With the chosen inductance value, the peak current for the inductor in steady state operation can be calculated.

into account that load transients and error conditions may cause higher inductor currents. This also needs to be

taken into account when selecting an appropriate inductor. The following inductor series from different suppliers

have been used with TPS63000 converters:

Table 1. List of Inductors

VENDOR

INDUCTOR SERIES

LPS3015

Coilcraft

LPS4012

Murata

LQH3NP

Tajo Yuden

NR3015

VLF3215

TDK

VLF4012

At least a 4.7

µF input capacitor is recommended to improve transient behavior of the regulator and EMI

behavior of the total power supply circuit. A ceramic capacitor placed as close as possible to the VIN and PGND

pins of the IC is recommended.

Copyright © 2009, Texas Instruments Incorporated

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Product Folder Link(s): TPS63000-Q1