sc46208a33 Silan, sc46208a33 Datasheet - Page 6

• Manufacturer Part Number: sc46208a33
• Description: 1.5mhz, 600ma, High Efficiency Synchronous Step-down Dc-dc Converter
• Manufacturer: Silan

SC46208
Setting The Output Voltage
For voltage adjustable version, SC46208 adjusts the output voltage through two serial resistors, refer to fig.1.
R1
We can calculate the output voltage through the following equation:
=
+
V
(1
)X0.6V
OUT
R2
Refers to fig.1, the selection of resistor R1, R2 should give attention to the quiescent power and external
interfere. Higher impedance reduces the quiescent current (I=0.6V/R2), and lower resistance gives better noise
immunity, and is less sensitive to interference, layout parasitics and FB node leakage current. A proper value of
feed-forward capacitor C1 can improve the noise immunity of the feedback loops, especially in an improper
layout.
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
REV:1.0
2008.02.29
Http://www.silan.com.cn
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