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AS1383 − External Component Selection

An external inductor (L) and two capacitors (CIN and COUT) are

needed for the AS1383 functionality. With the adjustable

variant also two external resistors are needed to program the

VOUT voltage. This section gives recommendations for the

components to be used.

Inductor Selection

Figure 13:

Recommended Inductors

Capacitor Selection

When choosing ceramic capacitors for CIN and COUT, the X5R or

X7R dielectric formulations are recommended. These

dielectrics have the best temperature and voltage

characteristics for a given value and size. Y5V and Z5U dielectric

capacitors, aside from their wide variation in capacitance over

temperature, become resistive at high frequencies and

therefore should not be used.

Note that the last components in the tables are the ones that

are used in the evaluation board instead of the smallest possible

components.

Figure 14:

Recommended CIN Capacitors

Part Number

DCR

Current

Rating

Dimensions in

mm (L / W / H)

Manufacturer

CIG22H1R0MAE

1μH

65mΩ

1.8A

2.5 x 2.0 x 1.0

www.samsungsem.com

XFL4020-102

1μH

11.9mΩ

11A

4.3 x 4.3 x 2.1

www.coilcraft.com

DFE201610E

1μH

96mΩ

2.2A

2.0 x 1.6 x 1.0

www.toko.co.jp

LQM18PW1R0MCH

1μH

288mΩ

0.95A

1.6 x 0.8 x 0.5

www.murata.com

Part Number

Code

Voltage

Rating

Dimensions in

mm (L / W / H)

Manufacturer

GRM219R61A106ME47

10μF

X5R

10V

2.0 x 1.2 x 1.25

www.murata.com

CL10A106KP8NNNC

10μF

X5R

10V

1.6 x 0.8 x 0.8mm

www.samsungsem.com

External Component Selection

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