ZA3020
2A Step-Down, PWM, Switch-Mode
DC-DC Regulators
3(4#4!%'
/!2! ! !!0!32
4 !!0!%5/607!22/8-9+
: %
DC IN
+
-
SYNC EN
+
+
+
-
DC OUT
ZA3020 DC-DC
DEMO BOARD V1.0
STEP-DOWN CONVERTER
4.75 ~ 28V to 1.2 ~ 21V
Vout= 1.222
R? + R02
R02
(V)
R?=R03,R04,R05,R06,R07,R08
3(4#4!"
/
0
(
1
2222222222222222222222222222222222222222222222
&
!
&
#1
!
#1
!!!&*
&*
"
&
"
&*"
#
&
#
!!*"
%
&
%
&*"
&
&&
&*"%&!&
$
&
$
!!*&3%&!&
&
+&
4!"5,6!.",7
'
&
-&
&%
&
!
(&
&&8
(!
&&8
&&
&
("
&8
&!
&
(#
!"!&8
&"
&
(%
#$%&8
&#&(&%&8
&%
&
($
&'&8
&
&
(
"'&8
&$
&
9&
:."!5,)
ZA3020 Rev. 3.5 2003-04-22
www.vimicro.com
9