朋友请帮忙看一下 请问VDO是什么

kingyb

这是一 LDO说明上写到
The minimum Vin must be larger than Vout + VDO, independent from the minimum value given in the selection table.
请问VDO是什么？

[此贴子已经被6123456于2007-2-3 9:26:04编辑过]

kingyb

这是一 LDO说明上写到
The minimum Vin must be larger than Vout + VDO, independent from the minimum value given in the selection table.
请问VDO是什么？

[此贴子已经被6123456于2007-2-3 9:26:04编辑过]

jeffsteven

VDO = Drop out voltage
you can see your LDO spec. and the parameter was written on spec.
for example :
you want to design the output 3.3V ,and you use VDO=1.5V LDO component
so the valid  min. input voltage = 3.3V+1.5V = 4.8V
if you use lower than 4.8V as input voltage , you should not get the LDO output voltage value that you want.

jeffsteven

VDO = Drop out voltage
you can see your LDO spec. and the parameter was written on spec.
for example :
you want to design the output 3.3V ,and you use VDO=1.5V LDO component
so the valid  min. input voltage = 3.3V+1.5V = 4.8V
if you use lower than 4.8V as input voltage , you should not get the LDO output voltage value that you want.