Datasheet
LTC2977
94
2977fa
For more information www.linear.com/LTC2977
LINEAR TECHNOLOGY CORPORATION 2013
LT 0913 REV A • PRINTED IN USA
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com/LTC2977
TYPICAL APPLICATION
Figure 34. LTC2977 Application Circuit with 3.3V Chip Power
V
IN
V
OUT
R27
61
11
60
2
3
38
4
39
36
37
R37R30
R17
R20
R10
RUN/SS
SGND
V
FB
GND
DC/DC
CONVERTER
LOADLOAD
V
DACP7
V
SENSEP7
V
SENSEM7
V
DACM7
V
OUT_EN7
V
DACP0
V
SENSEP0
V
SENSEM0
V
DACM0
V
OUT_EN0
V
IN
V
OUT
R26
58
10
59
64
1
R36
R16
RUN/SS
SGND
V
FB
GND
DC/DC
CONVERTER
LOAD
V
DACP6
V
SENSEP6
V
SENSEM6
LTC2977
V
DACM6
V
OUT_EN6
V
IN
V
OUT
R25
57
9
56
62
63
R35
R15
RUN/SS
SGND
V
FB
GND
DC/DC
CONVERTER
LOAD
V
DACP5
V
SENSEP5
V
SENSEM5
V
DACM5
V
OUT_EN5
V
IN
V
OUT
R24
54
8
55
52
53
R34
R14
RUN/SS
SGND
V
FB
GND
2977 F34
DC/DC
CONVERTER
LOAD
V
DACP4
V
SENSEP4
V
SENSEM4
V
DACM4
V
OUT_EN4
V
IN
RUN/SS
V
OUT
SGND
V
FB
GND
DC/DC
CONVERTER
41
5
40
42
43
V
DACP1
V
SENSEP1
V
SENSEM1
V
DACM1
V
OUT_EN1
45
6
44
46
47
R32
R22
R12
LOAD
V
DACP2
V
SENSEP2
V
SENSEM2
V
DACM2
V
OUT_EN2
V
IN
RUN/SS
V
OUT
SGND
V
FB
GND
DC/DC
CONVERTER
IN
OUT
EN
INTERMEDIATE
BUS
CONVERTER
51
7
12
10k
50
48
49
V
DACP3
V
SENSEP3
V
SENSEM3
V
DACM3
V
OUT_EN3
V
IN_EN
10k
10k
10k
5.49k
10k
10k
TO/FROM OTHER LTC2974s, LTC2977s AND MICROCONTROLLER
3.3V3.3V
10k
10k
10k
10k
10k
23
FAULTB00
13
0.1µF
3435 65 19 18 17 16 15 33 32 14
3.3V
24
FAULTB01
25
FAULTB10
26
FAULTB11
21
SHARE_CLK
27
SDA
28
SCL
29
ALERTB
30
CONTROL0
31
CONTROL1
20
PWRGD
22
WDI/RESETB
DNC
REFM
REFP
GND
WP
V
DD25
V
DD33
V
DD33
V
PWR
ASEL1
ASEL0
V
IN_SNS
0.1µF
0.1µF
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