KTB8331

December 2021

– Revision 04b

Page 22 of 25

Kinetic Confidential

Applications Information

Recommended Inductors

The KTB8331 is trimmed for inductors with nominal inductance of 330nH or 470nH. Select an inductor with a

saturation current rating that is higher than the KTB8331 peak current limit. Also, choose an inductor with

sufficient temperature-rise current rating to satisfy the RMS load-current of the application. Consider the

inductor’s resistance (both DCR and ACR at 2.4MHz), since these will affect the efficiency. (Generally, the ACR

vs. frequency characteristic is available upon request from the inductor supplier.) Larger physical case-sizes,

good winding designs, and better magnetic materials can increase efficiency. Typically, metric 2012 and 2016

case-sizes are suitable. Table 1 is a list of recommended inductors from two leading suppliers.

Table 1. Recommended Inductors

Maker

Part #

L (typ)

DCR (typ)

ISAT (min)

I∆T+40C (min)

Size (typ/typ/max)

Murata

DFE201210U-R33M

DFE201210U-R47M

330nH

470nH

25m

Ω

34m

Ω

5.2A

4.4A

3.4A

3.0A

2.0 x 1.2 x 1.0mm

Murata

DFE201610E-R33M

DFE201610E-R47M

330nH

470nH

21m

Ω

26m

Ω

5.5A

4.8A

4.0A

3.6A

2.0 x 1.6 x 1.0mm

Murata

DFE201612E-R33M

DFE201612E-R47M

330nH

470nH

15m

Ω

20m

Ω

6.3A

5.5A

4.8A

4.5A

2.0 x 1.6 x 1.2mm

Samsung E-M

CIGT201208EHR47MNE

470nH

31m

Ω

4.1A

3.7A

2.0 x 1.25 x 0.8mm

Samsung E-M

CIGT201210UHR33MNE

CIGT201210UHR47MNE

330nH

470nH

21m

Ω

25m

Ω

5.4A

4.9A

4.0A

3.6A

2.0 x 1.25 x 1.0mm

Samsung E-M

CIGT201608EHR47MNE

470nH

24m

Ω

4.3A

4.3A

2.0 x 1.6 x 0.8mm

Samsung E-M

CIGW201610GHR33MLE

CIGW201610GLR47MLE

CIGT201610EHR47MNE

330nH

470nH

470nH

18m

Ω

21m

Ω

18mΩ

5.5A

5.0A

5.5A

4.0A

4.7A

4.8A

2.0 x 1.6 x 1.0mm

Recommended Capacitors

Ceramic input and output capacitors with X5R or X6S are recommended due to their low ESR, low ESL, low

temperature coefficients, and small physical sizes. Consider the voltage rating, size, and DC bias derating

characteristic of the capacitor. Table 2 is a list of recommended capacitors from two leading suppliers.

Table 2. Recommended Capacitors

Maker

Part #

C (typ)

CEFF(3V)

VRATING

TCHAR

Size

Murata

GRM155R60J106ME

GRM155R60J156ME

GRM155R60G226ME

GRM155R60J226ME

10µF

15µF

22µF

22µF

3.5µF

5µF

7µF

7µF

6.3V

6.3V

4.0V

6.3V

X5R

(0402) 1.0 x 0.5mm

Murata

GRM188R60G226ME

GRM188R60J226ME

22µF

22µF

9µF

9µF

4.0V

6.3V

X5R

(0603) 1.6 x 0.8mm

Samsung E-M

CL05A106MQ5

CL05A156MQ5

10µF

15µF

4µF

6µF

6.3V

6.3V

X5R

(0402) 1.0 x 0.5mm

Samsung E-M

CL10A226MQ8

CL10A476MQ8

22µF

47µF

11µF

14µF

6.3V

6.3V

X5R

(0603) 1.6 x 0.8mm

Input Capacitor

Choose an input capacitor with voltage rating of 6.3V or more, 10uF total nominal capacitance or more, and

1005M (0402) case-size or larger. Larger values and larger case-size provide more effective capacitance when

considering the DC bias derating characteristic of the capacitor.

If the application’s input voltage is supplied

through a connector or a cable, add additional bypass/bulk capacitance where VIN first arrives to the PCB.

Output Capacitors

Choose output capacitors with voltage rating of 4.0V or more, 20uF total nominal capacitance or more, and

1005M (0402) case-size or larger. Consider the VOUT setting of the regulator and how case size has a significant