LTC3876_15 Datasheet, PDF (43/48 Pages) Linear Technology – Dual DC/DC Controller for DDR Power with Differential VDDQ Sensing and 50mA VTT Reference

APPLICATIONS INFORMATION
V_IN
4.5V TO 14V
C_IN1
180μF
w2
C_IN2
10μF
w3
VDDQ
1.8V
20A
C_OUT1
100μF
L1
0.47μH
5.9k
MT1
C_OUT2
330μF
w2
MB1
2.2Ω
1μF
0.1μF
0.1μF
LTC3876
V_IN
SENSE1^–
SENSE2^–
SENSE1⁺
SENSE2⁺
BOOST1
TG1
DB1
2.2Ω
1μF
SW1
4.7μF
DRV_CC1
INTV_CC
BG1
BOOST2
TG2
SW2
DRV_CC2
EXTV_CC
BG2
PGND
30.1k
100k
VDDQSNS
V_OUTSENSE1+
20k
V_{OUTSENSE1–}
PGOOD _PGOOD
0.01μF
VTTRVCC
VTTSNS
VTTR
120pF
TRACK/SS1
ITH1
ITH2
1500pF
12.7k
0.1μF
0.1μF
DB2
1Ω
1μF
2.2μF
470pF
4700pF
13.7k
100k
DTR1
V_RNG1
RT
SGND
RUN
CVCC
V_RNG2
PHASMD
MODE/PLLIN
CLKOUT
3876 F13a
LTC3876
2.74k
MT2
L1
0.47μH
MB2
C_OUT4
330μF
VTT
0.9V
±10A
C_OUT3
100μF
VTTR
±50mA
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
100
4.5
V_IN = 12V
VDDQ = 1.8V
4.0
90
3.5
DISCONTINUOUS
80 _MODE
3.0
2.5
70
2.0
60
1.5
50
40
0.1
1.0
FORCED
CONTINUOUS ^0.5
MODE
0
1
10
LOAD CURRENT (A)
3876 F13b
Figure 13. 4.5V to 14V Input, VDDQ 1.8V/20A and VTT 0.9V/±10A Output, 400kHz, DCR, Step-Down Converter
3876f
43