Datasheet
LTC2974
98
2974fc
For more information www.linear.com/LTC2974
LINEAR TECHNOLOGY CORPORATION 2012
LT 1013 REV C • PRINTED IN USA
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com/LTC2974
relaTeD parTs
Typical applicaTion
PART NUMBER DESCRIPTION COMMENTS
LTC2970 Dual I
2
C Power Supply Monitor and Margining Controller 5V to 15V, 0.5% TUE 14-Bit ADC, 8-Bit DAC, Temperature Sensor
LTC2977 8-Channel PMBus Power System Manager 0.25% TUE 16-Bit ADC, Voltage/Temperature Monitoring and Supervision
LTC3880 Dual Output PolyPhase Step-Down DC/DC Controller 0.5% TUE 16-Bit ADC, Voltage/Current/Temperature Monitoring and Supervision
LTC3883 Single Output PolyPhase Step-Down DC/DC Controller 0.5% TUE 16-Bit ADC, Voltage/Current/Temperature Monitoring and Supervision
V
IN
SWX
TG
62
5
57
19
61
RUN/SSSGND
V
FB
PGND
DC/DC
CONVERTER
MMBT3906
330nF
LOAD
V
DAC2
V
SENSEP2
27
T
SENSE2
V
SENSEM2
V
OUT_EN2
46
I
SENSEM2
45
I
SENSEP2
REFP
REFM
LTC2974
GND
20
GND
21
GND
37
GND
39
GND
2974 TA02
INTERMEDIATE
BUS
7
AUXFAULTB
TO/FROM OTHER LTC2974s, LTC2978s AND MICROCONTROLLER
25
FAULTB0
0.1µF
65 28 139
18
SHARE_CLK
29
SDA
30
SCL
31
ALERTB
17
PWRGD
23 22
CONTROL3
33
CONTROL2
CONTROL1
32
CONTROL0
24
WDI/RESETB
GND
WP
V
DD25
14
V
DD25
5111 12 10 36 35
3.3V
NC
52
NC
55
NC
56
NC
59
NC
60
NC
8
DNC
V
DD33
V
DD33
V
PWR
ASEL1
ASEL0
V
IN_SNS
26
FAULTB1
0.1µF
0.1µF
BG
V
IN
SWX
TG
50
6
58
49
RUN/SSSGND
V
FB
PGND
DC/DC
CONVERTER
MMBT3906
330nF
LOAD
V
DAC3
V
SENSEP3
34
T
SENSE3
V
SENSEM3
V
OUT_EN3
48
I
SENSEM3
47
I
SENSEP3
BG
2
3
53
1
V
DAC0
V
SENSEP0
15
T
SENSE0
V
SENSEM0
V
OUT_EN0
42
38
40
I
SENSEM0
41
I
SENSEP0
64
4
54
63
V
DAC1
V
SENSEP1
16
T
SENSE1
V
SENSEM1
V
OUT_EN1
44
I
SENSEM1
43
I
SENSEP1
10k
5.49k
3.3V 3.3V
10k
10k
10k
10k
10k
10k
10k
10k
10k
10k
V
IN
SWX
TG
RUN/SS SGND
V
FB
PGND
DC/DC
CONVERTER
BG
V
IN
SWX
TG
RUN/SS SGND
V
FB
PGND
DC/DC
CONVERTER
BG
MMBT3906
330nF
LOAD
MMBT3906
330nF
LOAD
3.3V
0V