SC2677B_09 Datasheet, PDF (10/19 Pages) Semtech Corporation – Dual Synchronous Voltage Mode Controller with Current Sharing Circuitry

POWER MANAGEMENT
Evaluation Schematic
Dual Independent outputs
SC2677B
+12V
C1 C4
4.7uF
M1
IPD13N03LA
C6
1uF
CS1-
R51
CS1+
13K
C63
220nF
R50
VP1
7.32K _L1
8.8uH
DCR=8.83mohm
M3
R1
1.0
C9 C10 C19
C21
4.7uF 4.7uF
1nF
D1 ^D1N4148 D1N41D428
R9
10.0K
R11
10.0K
R12
Q1 ₃₀₀
Q2
Enable
PWRGD
C28
1uF ^R13
4.42k
Enable/Disable
Circuit(option)
R19
U1
6.19K
R5
7.5K
C24
0.1uF ^C25
1uF
SC2677B
C23
1uF
C26
100nF
C27
R14
12.4K
R8
9.09K
R10
1.00K
C34
47pF
C33
47nF
R21
4.53K
Delay Output
R18
Circuit(option)
5.6K
+12V
C36
0.1uF
R31
2.2
C39
1uF
C40 C43
R52
C38
R20
Q3 2K
1K
1uF
CS2-
CS2+
R49
33.2K
C62
R54 D5
R53
3K 1N4148
8K
R55
C50
4.7k
1uF
M5
IPD13N03LA
220nF
VP2
R48
4.02K
L2
4.7uH
DCR=6.35mohm
D3
1N4148
C59
R35
M7 1.0
1uF
C60
C47 C46 C57
1nF
R36
D4
0R0
1N4148
Vout1
5V@2A
Vout2
3.3V@2A
© 2009 Semtech Corp.
10
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