ams Datasheet

Page 11

[v1-04] 2015-Jun-19

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AS1382 − Application Information

Ceramic Input and Output Capacitors

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.

Figure 14:

Recommended Input and Output Capacitors

Because ceramic capacitors lose a lot of their initial capacitance

at their maximum rated voltage, it is recommended that either

a higher input capacity or a capacitance with a higher rated

voltage is used.

Feedback Resistor Selection

In the AS1382-AD, the output voltage is set by an external

voltage sensing and adjustment.

Figure 15:

Adjustable Variant

AS1382-AD: Shows the application diagram for the adjustable output version with the external resistor divider

Part Number

C

TC

Code

Voltage

Rating

Dimensions

(L/W/H)

Manufacturer

GRM21BR61E475KA12L 

4.7uF

X5R

25V

0805

www.murata.com

GRM219R60J106KE19D

10uF

X5R

6.3V

0805

www.murata.com

SW

FB

GND

1uH

10uF

R1

R2

AS1382-AD