ADP5065ACBZ-1-R7 datasheet(33/40 Pages) AD

33 / 40 page

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

ISO

CFILT

ISO

MAX

CHG

LOAD

CIN

)

(

)

(

−

≥

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

0805

Murata

GRM188R61E225KA12

2.2 µF

0603

TDK

C1608X5R1E225K

2.2 µF

0603

TAIYO-

YUDEN

TMK107ABJ225MA

2.2 µF

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

3.5 × 2.7 × 1.7

Coilcraft

XFL3010-102ME

2.4 A

3.2 × 3.2 ×1.1

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