DIO60010/A

Version 1.4, Oct 2025

www.dioo.com

© 2025 Dioo Microcircuits Co., Ltd. Jiangsu

10

9.6. Feedback resistor dividers R1 and R2

Choose R1 and R2 to program the proper output voltage. To minimize the power consumption under light loads,

choose large resistance values for both R1 and R2. For example, it is recommended that the resistance value of

R1 is 20 kΩ, then R2 can be calculated from Equation (1).

1

OUT

2

R

0.6V

-

V

0.6V

R





(1)

Figure 17. Feedback resistor dividers R1 and R2

9.7. Input capacitor CIN

With the maximum load current at 1 A, the maximum ripple current through the input capacitor is about 0.5 A. A

typical X7R or better grade ceramic capacitor with 10 V rating and greater than 10 µF capacitance can handle

this ripple current well. To minimize the potential noise problem, place this ceramic capacitor really close to the

IN and GND pins. Carefully minimize the loop area formed by CIN, and IN/GND pins.

9.8. Output capacitor COUT

The output capacitor is selected to handle the output ripple noise requirements. Both steady-state ripple and

transient requirements must be taken into consideration when selecting this capacitor. For the best performance,

use X5R or a better grade ceramic capacitor with 6 V rating and greater than 10 µF capacitance.

9.9. Output inductor L

There are several considerations in choosing this inductor.

(1) Choose the inductance to provide the desired ripple current. Choose the ripple current to be approximately

40% of the maximum output current. The inductance is calculated from Equation (2).

40%

×

I

×

f

)

/V

V

-

(1

×

V

=

L

MAX

OUT,

SW

MAX

IN,

OUT

OUT

(2)

where fSW is the switching frequency and IOUT,MAX is the maximum load current. The DIO60010/A regulator IC is

quite tolerant of different ripple current amplitudes. Consequently, the final choice of inductance can be slightly

off the calculation value without significantly impacting the performance.