TYPICAL ? APPLICATION ?
?
+3.3V
15A ? Highly ? Integrated ? SupIRBuck TM ?
IR3477 ?
VCC
R1
+Vins
TP1
VINS
R2
10K
TP3
FCCM
10K
VIN
TP2
VIN
TP4
EN
SW1
EN
FCCM
R3
200K
+Vin1s
TP20
+Vin1s
C1
1uF
C2
22uF
+ C3
68uF
TP5
PGND
EN / FCCM
VSW
R4
7.50K
ISET
C4
1uF
L1
-Vins
TP6
PGNDS
TP23
+Vsws
1.0uH
U1
IR3477
VSW
VOUT
TP7
VOUT
+3.3V
R5
10K
C5
open
1
2
FCCM
ISET
R6
open
C13
open
C6
open
C7
open
C8
open
C9
330uF
C10
47uF
C11
open
C12
0.1uF
2
5 TP8
VOUTS
TP11
PGOOD
TP13
SS
PGOOD
FB
SS
C20
0.1uF
3
4
5
6
7
PGOOD
GND1
FB
SS
NC1
IR3477
PHASE
12
2
5
TP22
+Vsws
TP12
VSWS
TP9
+Vout1s
C15
open
C16
open
C17
open
C18
open
C19
open
C26
open
C27
open
TP24
+Vsws
TP10
PGND
TP21
-Vsws
TP14
+3.3V
TP26
AGND
+3.3V
+Vdd2s
-Vdd2s
C21
1uF
-Vout1s
+Vdd1s
TP15
-Vout1s
TP25
-Vin1s
TP16
VCC
VCC
C23
C25
1uF
C22
open
-Vdd1s
C14
open
R7
1.33K
C24
open
TP18
VOLTAGE SENSE
TP17
open
PGND
R11
TP19
open
FB
R12
open
R8
1.21K
R13
open
R14
open
?
Figure ? 4: ? Demoboard ? Schematic ? for ? VOUT ? = ? 1.05V, ? F S ? = ? 300kHz ?
?
DEMOBOARD ? BILL ? OF ? MATERIALS ?
QTY ?
4 ?
1 ?
2 ?
1 ?
1 ?
1 ?
1 ?
3 ?
1 ?
1 ?
1 ?
1 ?
1 ?
1 ?
REFERENCE ? DESIGNATOR ?
C1, ? C21, ? C25, ? C4 ?
C10 ?
C12, ? C20 ?
C2 ?
C3 ?
C9 ?
L1 ?
R1, ? R2, ? R5 ?
R3 ?
R4 ?
R7 ?
R8 ?
SW1 ?
U1 ?
VALUE ?
1.00uF ?
47uF ?
0.100uF ?
22.0uF ?
68uF ?
330uF ?
1.0uH ?
10.0K ?
200K ?
7.50K ?
1.33K ?
1.21K ?
SPST ?
IR3477 ?
DESCRIPTION ?
capacitor, ? X7R, ? 1.00uF, ? 25V, ? 0.1, ? 0603 ?
capacitor, ? 47uF, ? 6.3V, ? 805 ?
capacitor, ? X7R, ? 0.100uF, ? 50V, ? 0.1, ? 603 ?
capacitor, ? X5R, ? 22.0uF, ? 25V, ? 20%, ? 1206 ?
capacitor, ? electrolytic, ? 86uF, ? 25V, ? 0.2, ? SMD ?
capacitor, ? 330uF, ? 2.5V, ? SMD ?
inductor, ? ferrite, ? 1.0uH, ? 20A, ? 2.7mOhm, ? SMT ?
resistor, ? thick ? film, ? 10.0K, ? 1/10W, ? 0.01, ? 603 ?
resistor, ? thick ? film, ? 200K, ? 1/10W, ? 0.01, ? 603 ?
resistor, ? thick ? film, ? 7.50K, ? 1/10W, ? 0.01, ? 603 ?
resistor, ? thick ? film, ? 1.33K, ? 1/10W, ? 0.01, ? 603 ?
resistor, ? thick ? film, ? 1.21K, ? 1/10W, ? 0.01, ? 603 ?
switch, ? DIP, ? SPST, ? 2 ? position, ? SMT ?
5mm ? x ? 6mm ? QFN ?
MANUFACTURER ?
Murata ?
TDK ?
TDK ?
TDK ?
Panasonic ?
Sanyo ?
Cyntec ?
KOA ?
KOA ?
KOA ?
KOA ?
KOA ?
C&K ? Components ?
IRF ?
PART ? NUMBER ?
GRM188R71E105KA12D ?
C2012X5R0J476M ?
C1608X7R1H104K ?
C3216X5R1E226M ?
EEV ‐ FK1E680P ?
2R5TPE330M9 ?
PIMB103E ‐ 1R0MS ‐ 39 ?
RK73H1J1002F ?
RK73H1JLTD2003F ?
RK73H1JLTD7501F ?
RK73H1J1331F ?
RK73H1JLTD1211F ?
SD02H0SK ?
IR3477MTRPBF ?
4
March ? 27, ? 2013 ?? | ??? V2.5 ?? | ?? PD97604
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