DIO6920H

www.dioo.com

© 2023 DIOO MICROCIRCUITS CO., LTD

DIO6920H• Rev. 1.1

Load transient considerations

The DIO6920H regulator IC integrates the compensation components to achieve good stability and fast transient

responses. In some applications, adding a 22 pF ceramic cap in parallel with R1 may further speed up the load

transient responses and is thus recommended for applications with large load transient.

Figure 14. Load transient considerations

Layout design

The layout design of the DIO6920H regulator is relatively simple. For the best efficiency and minimum noise

problems, we should place the following components close to the IC: CIN, L, R1 and R2.

1) It is desirable to maximize the PCB copper area connecting to GND pin to achieve the best thermal and

noise performance. If the board space allowed, a ground plane is highly desirable.

2) CIN must be close to Pins IN and GND. The loop area formed by CIN and GND must be minimized.

3) The PCB copper area associated with SW pin must be minimized to avoid the potential noise problem.

4) The components R1 and R2, and the trace connecting to the FB pin must NOT be adjacent to the SW net on

the PCB layout to avoid the noise problem.

5) If the system chip interfacing with the EN pin has a high impedance state at shutdown mode and the IN pin is

connected directly to a power source such as a Li-Ion battery, it is desirable to add a pull down 1 MΩ resistor

between the EN and GND pins to prevent the noise from falsely turning on the regulator at shutdown mode.