DA9211 Datasheet, PDF (71/74 Pages) Dialog Semiconductor – Integrates two dual-phase buck converters

DA9211 and DA9212
Datasheet
Company confidential
15. Application Information
The following recommended components are examples selected from requirements of a typical
application.
15.1 Capacitor Selection
Ceramic capacitors are used as bypass capacitors at all VDD and output rails. When selecting a
capacitor, especially for types with high capacitance at smallest physical dimension, the DC bias
characteristic has to be taken into account.
Table 17: Recommended capacitor types
Application
VOUT
output
bypass
Value
4x 22 µF
4x 10 µF
Size
0402
0402
Temp Char
X5R +/-15%
X5R +/-15%
VDDx
bypass
VSYS
bypass
VDDIO
bypass
4x 10 µF
1x 1 µF
1x
100 nF
0603
0402
01005
X5R +/-15%
X5R +/-15%
X5R +/-15%
Tol
+/-20%
+/-20%
+/-20%
+/-10%
±10%
V-Rate
4V
Type
Semco
CL05A226MR5NZNC
10 V
6.3 V
10 V
6.3 V
Semco
CL05A106MP5NUNC
Murata
GRM188R60J106ME84
Murata
GRM155R61A105KE15#
Semco
CL02A104KQ2NNN
15.2 Inductor Selection
Inductors should be selected based upon the following parameters:
● Rated max. current: usually a coil provides two current limits: The Isat specifies the maximum
current at which the inductance drops by 30% of the nominal value. The Imax is defined by the
maximum power dissipation and is applied to the effective current.
● DC resistance: critical for the converter efficiency and should therefore be minimised.
● Inductance: given by converter electrical characteristics; 0.47uH for each DA9211 and DA9212
phase.
Data sheet
CFR0011-120-00 Rev 3
Version <3.0>
71 of 74
<07-Jan-2015>
© 2015 Dialog Semiconductor GmbH