LTC3861-1 Datasheet, PDF (32/36 Pages) Linear Technology – Dual, Multiphase Step-Down Voltage Mode DC/DC Controller with Accurate Current Sharing

LTC3861-1
Typical Applications
Dual Phase 1.2V/45A Converter with Delta 45A Power Block, f_SW = 400kHz
V_IN
7V TO 14V
6.8nF _110Ω
10k
V_CC
5V
1.69k
150pF
10k
C_IN
180µF
1.5nF
V_OUT
V_CC
100pF
1µF ^SS1
V_CC
100k
RUN1
FB1
COMP1
VSNSP
VSNSN
VSNSOUT
COMP2
FB2
LTC3861-1
RUN1
ILIM1
SGND
ISNS1P
ISNS1N
ISNS2N
ISNS2P
SGND
ILIM2
RUN2
45.3k
V_CC
0.22µF
V_IN
22µF
16V
22µF
16V
C_OUT2 : SANYO 2R5TPE330M9
C_OUT1 : MURATA GRM32ER60J107ME20
SS1 _30.9k
RUN1
0.22µF
TEMP1
+CS1
– CS1
D12S1-
V_{IN1 R845A} GND
22µF
16V
PWM1
V_OUT1
GND
+7V
22µF
16V
PWM2
V_IN2
V_OUT2
GND
+CS2
– CS2
TEMP2
4.7µF
V_OUT
1.2V/ 45A
C_OUT1 C_OUT2
100µF × 4 330µF× 6
6.3V
2.5V
38611 TA02
1.5V/30A and 1.2V/30A Converter with Discrete Gate Drivers
and MOSFETs, f_SW = 300kHz
V_OUT2
V_IN
7V TO 14V
2.2nF _499Ω
V_CC
5V
3.92k
C_IN1 0.1µF
180µF
1µF
2.2nF
V_CC
100k
V_CC
4.7µF
RUN1
V_IN
IN
LTC4449
GND
D1
V_LOGIC TG
V_CC
TS
BOOST BG
0.22µF
C_IN2
22µF × 2
M1
BSC050NE2LS
×2
M2
BSC010NE2LS
×2
30.1k _100pF
20k
20k ^100pF
499Ω
2.2nF
3.57k
20k
V_OUT1
2.2nF
FB1
COMP1
VSNSP
VSNSN
VSNSOUT
COMP2
FB2
LTC3861-1
RUN1
ILIM1
SGND
ISNS1P
ISNS1N
ISNS2N
ISNS2P
SGND
ILIM2
RUN2
61.9k
61.9k
0.047µF
27.4k
100k
RUN2
V_CC
V_{CC 4.7µF}
D2
C_OUT2, C_OUT4 : SANYO 2R5TPE330M9
C_OUT1, C_OUT3 : MURATA GRM32ER60J107ME20
L1, L2 : WÜRTH ELEKTRONIK 744355147
V_IN
IN
LTC4449
GND
V_LOGIC TG
V_CC
TS
BOOST BG
0.22µF
0.22µF
0.22µF
C_IN3
22µF × 2
M3
M4
BSC050NE2LS
×2
BSC010NE2LS
×2
L1
0.47µH
2.87k
2.87k
L2
0.47µH
V_OUT1
1.5V/ 30A
C_OUT1 C_OUT2
100µF × 2 330µF × 3
6.3V
2.5V
V_OUT2
1.2V/ 30A
C_OUT3 C_OUT4
100µF × 2 330µF × 3
6.3V
2.5V
38611 TA03
38611f
32