EC3618 datasheet(4/8 Pages) E-CMOS

4 / 8 page

EC3618

E-CMOS Corp. (www.ecmos.com.tw)

4K25N-Rev.F003

Page 4 of 8

PWM Control 2A Step-Down Converter

Application Circuit

Function Descriptions

EN：

：

：This pin can be supplied shutdown function. It is inside pull high function. Allow the switching regulator circuit

to be shutdown pulling this pin below a 0.8V threshold voltage.

SS：

：

：This pin can be supplied soft start function. The pin must be connected a capacitor to ground. There is a

10uA current to charge this capacitor, vary the different capacitor value to control soft start time.

COMP：

：

：Compensation pin. For EL output capacitor application, the COMP pin connects R2 and C9 to ground

for all condition; please refer the compensation table.

APPLICATION INFORMATION

Setting the Output Voltage

Application circuit item shows the basic application circuit with adjustable output version. The external resistor sets

the output voltage according to the following equation:

Table 1 Resistor select for output voltage setting

VOUT

1.5K

3.3V

1.3K

EC3618 Datenblatt(PDF) 4 Page - E-CMOS Corporation