Datasheet

Data Sheet ADP5065
Rev. D | Page 33 of 40
VINx Capacitor Selection
According to the USB 2.0 specification, USB peripherals have a
detectable change in capacitance on VBUS when they are attached.
The peripheral device VBUS bypass capacitance must be at least
1 µF but not larger than 10 µF. The combined capacitance for
the VINx and CFILT pins must not exceed 10 µF at any tempera-
ture or dc bias condition. Suggestions for a VINx capacitor is
given in Table 32.
CFILT Capacitor Selection
CFILT pin serves the ADP5065 as the step-down dc-to-dc
converter input capacitor. Maximum input capacitor current
is calculated using the following equation:
CFILT
SISO
CFILT
SISO
MAXCHGLOAD
CIN
V
VVV
II
)(
__
)(
−
≥
+
To minimize supply noise, place the input capacitor as close as
possible to the CFILT pin of the charger. As with the output
capacitor, a low ESR capacitor is recommended.
The effective capacitance needed for stability, which includes
temperature and dc bias effects, is a minimum of 2 µF and a
maximum of 5 µF. A list of suggested capacitors is shown in
Table 31.
Table 30. ISO_Sx and ISO_Bx Capacitor Suggestions
Vendor Part Number Value Voltage Size
Murata GRM31CR61A226KE19 22 μF 10 V 1206
Murata GRM31CR60J226ME19 22 μF 6.3 V 1206
TDK C3216X5R0J226M 22 µF 6.3 V 1206
TAIYO-
YUDEN
JMK316ABJ226KL 22 µF 6.3 V 1206
Table 31. CFILT Capacitor Suggestions
Vendor Part Number Value Voltage Size
Murata GRM219R61C475KE15 4.7 μF 16 V 0805
Murata
GRM188R60J475ME84
4.7 μF
6.3 V
0603
TDK C1608X5R0J475K 4.7 μF 6.3 V 0603
TAIYO-
YUDEN
JMK107ABJ106MA 10 µF 6.3 V 0603
Table 32. VINx Capacitor Suggestions
Vendor Part Number Value Voltage Size
Murata GRM21BR71E225KA73 2.2 µF 25 0805
Murata GRM188R61E225KA12 2.2 µF 25 0603
TDK C1608X5R1E225K 2.2 µF 25 0603
TAIYO-
YUDEN
TMK107ABJ225MA 2.2 µF 25 0603
Table 33. 1.0 µH Inductor Suggestions
Vendor Part Number
Saturation Current
L −30% Drop
DCR (mΩ) Size Max L × W × H (mm)
Murata
LQH32PN1R0NN0
2.3 A
45
3.5 × 2.7 × 1.7
Coilcraft XFL3010-102ME 2.4 A 43 3.2 × 3.2 ×1.1