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IR3863MPBF
TYPICAL APPLICATION CIRCUIT
+3 .3V
V CC
R1
T P1
V INS
R2
10 K
10 K
V IN
T P2
V IN
T P4
EN
EN
C1
1u F
C2
22 uF
+ C3
68 uF
FCCM
S W1
R3
20 0K
T P5
P GND
E N / FCCM
R4
C4
0.22u F
T P6
T P23
V OUTS
10 K
P GNDS
V SW
ISE T
L1
2.2uH
+3 .3V
U1
IR3 863
V SW
V OUT
T P7
V OUT
R6
op en
C13
op en
C6
C7
C8
C9
C10
C11
C12
T P11
P GOOD
R5
10 K
T P13
SS
P GOOD
FB
SS
C20
0.1uF
1
2
3
4
5
6
7
FCCM
ISE T
P GOOD
GND1
FB
SS
NC1
IR3863
P HA SE
12
R13
op en
C24
op en
op en
C15
op en
op en
C16
op en
op en
C17
op en
15 0uF
C18
op en
47 uF
C19
op en
op en
C26
op en
0.1uF
C27
op en
T P24
P GNDS
T P10
P GND
T P14
+3.3V
+3 .3V
C21
1u F
T P26
A GND
R12
4.99
C25
1u F
C14
op en
R7
2.80K
T P18
V OLT A GE S E NS E
T P16
V CC
V CC
C23
T P17
P GND
op en
T P27
A
T P25
B
R11
20
R9
op en
R8
2.55K
R10
T P28
op en
1
Q1
op en
V ID
C22
op en
Figure 7. Typical Application Circuit for VOUT = 1.05V, Fs = 300kHz
Demoboard Bill of Materials
QTY REF DESIGNATOR VALUE
DESCRIPTION
MANUFACTURER
PART NUMBER
3
1
2
1
1
1
1
1
4
1
1
1
1
1
1
1
C1, C21, C25
C10
C12, C20
C2
C3
C4
C9
L1
R1, R2, R4, R5
R11
R12
R3
R7
R8
SW1
U1
1.00uF
47uF
0.100uF
22.0uF
68uF
0.22uF
150uF
2.2uH
10.0K
20
4.99
200K
2.80K
2.55K
SPST
IR3863
capacitor, X7R, 1.00uF, 25V, 0.1, 0603
capacitor, 47uF, 6.3V, 805
capacitor, X7R, 0.100uF, 25V, 0.1, 603
capacitor, X5R, 22.0uF, 16V, 20%, 1206
capacitor, electrolytic, 68uF, 25V, 0.2, SMD
capacitor, X5R, 0.22uF, 10V, 0.1, 0603
capacitor, tantalum polymer, 150uF, 6.3V, 20%, 7343
inductor, ferrite, 2.2uH, 8.0A, 11.2mOhm, SMT
resistor, thick film, 10.0K, 1/10W, 0.01, 0603
resistor, thick film, 20, 1/10W, 0.01, 603
resistor, thick film, 4.99, 1/8W, 0.01, 603
resistor, thick film, 200K, 1/10W, 0.01, 603
resistor, thick film, 2.80K, 1/10W, 0.01, 603
resistor, thick film, 2.55K, 1/10W, 0.01, 0603
switch, DIP, SPST, 2 position, SMT
4mm X 5mm QFN
Murata
TDK
TDK
Taiyo Yuden
Panasonic
TDK
Sanyo
Cyntec
KOA
KOA
KOA
KOA
KOA
KOA
C&K Components
IRF
GRM188R71E105KA12D
C2012X5R0J476M
C1608X7R1E104K
EMK316BJ226ML-T
EEV-FK1E680P
C1608X5R1A224K
6TPC150M
PCMB065T-2R2MS
RK73H1J1002F
RK73H1JLTD20R0F
RK73H1J4R99F
RK73H1JLTD2003F
RK73H1JLTD2801F
RK73H1JLTD2551F
SD02H0SK
IR3863MTRPBF
8/8/2012 Rev3.2
8
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