Datasheet

LTC3876
43
3876f
APPLICATIONS INFORMATION
Figure 13. 4.5V to 14V Input, VDDQ 1.8V/20A and VTT 0.9V/±10A Output, 400kHz, DCR, Step-Down Converter
13.7k
3876 F13a
0.1µF
0.1µF
1µF
470pF
4700pF
L1
0.47µH
C
OUT3
100µF
C
OUT4
330µF
VTT
0.9V
±10A
DB2
MT2
MB2
LTC3876
2.2
2.2
30.1k
VTTR
±50mA
1
100k
12.7k
100k
V
IN
1µF
0.1µF
4.7µF
0.1µF
0.01µF
120pF
1500pF
L1
0.47µH
C
OUT2
330µF
w2
C
OUT1
100µF
VDDQ
1.8V
20A
V
IN
4.5V TO 14V
20k
SENSE1
–
SENSE1
+
BOOST1
TG1
SW1
SENSE2
+
BOOST2
TG2
SW2
DRV
CC1
INTV
CC
DRV
CC2
EXTV
CC
DB1
MT1
5.9k
2.74k
SENSE2
–
BG1 BG2
VTTRVCC
PGND
V
OUTSENSE1
+
VDDQSNS
V
OUTSENSE1
–
PGOOD VTTR
VTTSNS
TRACK/SS1
ITH1
DTR1
V
RNG1
ITH2
CVCC
PHASMD
MODE/PLLIN
CLKOUT
V
RNG2
SGND
RUN
RT
PGOOD
MB1
1µF
C
IN2
10µF
w3
C
IN1
180µF
w2
2.2µF
C
IN1
: SANYO 16SVP180M
C
IN2
: MURATA GRM32DR61E106KA12L
C
OUT2
,C
OUT4
: SANYO 2R5TPE330M9
C
OUT1
, C
OUT3
: MURATA GRM31CR60J107ME39L
DB1, DB2: CENTRAL SEMI CMDSH-3
L1: WÜRTH 7443330047
L2: WÜRTH 7443340047
MT1, MB2: INFINEON BSC0901NS
MB1: INFINEON BSC010NE2LS
MT2: INFINEON BSC050NE2LS
LOAD CURRENT (A)
0.1
EFFICIENCY (%)
POWER LOSS (W)
90
100
110
3876 F13b
60
50
40
80
70
4.0
4.5
1.5
0.5
1.0
0
3.0
3.5
2.5
2.0
FORCED
CONTINUOUS
MODE
DISCONTINUOUS
MODE
V
IN
= 12V
VDDQ = 1.8V