2013-04-04 11:26 AM
The AN1088 app note states:
�
Vref ( Voltage Reference).
This is the internal 10V voltage reference pin to bias the logic and the low voltage circuitry of the device. A 1
m
F electrolytic capacitor connected from this pin to GND ensures the stability of the DMOS drive circuit. This pin can be externally loaded up to 5mA. Figure 3 and 4 show the typical behavior of the Vref pin.�
I was wondering whether a higher value ceramic capacitor can be used in place of the 1uF electrolytic capacitor on the Vref pin. For example, can we use a 4.7uF, 25V, ceramic, such as C1608JB1E475K080AC? The app note does not describe whether there are other capacitor options. Thanks! #l6234-an10882013-04-10 08:21 AM
The VREF capacitor can be ceramic, but its value should be >= of 1uF.
So the capacitor you indicated is OK.RegardsEnrico