EUP7967A
Adjustable Operation
The adjustable version of the EUP7967A has an output
voltage range of 1.2V to 4.5V. The output voltage of the
EUP7967A adjustable regulator is programmed using an
external resistor divider as shown in Figure3. The output
voltage is calculated using:
R
R
1
V = V ×(1+
)
O
ref
2
Where:
Vref= 1.2V typ. (the internal reference voltage)
Utilize the following equation for adjusting the output to
a particular voltage:
V
1.2V
O
R = R
−1
2
1
Choose R2=50k to optimize accuracy, power supply
rejection, noise and power consumption.
Figure3. Adjustable Regulator with Resistors
DS7967A Ver 1.4 Sep. 2007
8
EUTECH [ EUTECH MICROELECTRONICS INC ]
