Datasheet

LTC3861-1
33
38611fa
For more information www.linear.com/LTC3861-1
Typical applicaTions
1.5V/30A and 1.2V/30A Converter with Discrete Gate Drivers
and MOSFETs, f
SW
= 300kHz
V
OUT1
1.5V/30A
C
OUT1
100µF × 2
6.3V
C
OUT2
, C
OUT4
: SANYO 2R5TPE330M9
C
OUT1
, C
OUT3
: MURATA GRM32ER60J107ME20
L1, L2 : WÜRTH ELEKTRONIK 744355147
INPUT RIPPLE CURRENT AT THE INPUT CAPACITOR = 1.2A RMS
OUTPUT RIPPLE CURRENT AT THE OUTPUT CAPACITOR = 1.8A RMS
C
IN2
22µF × 2
V
OUT2
1.2V/30A
C
OUT3
100µF × 2
6.3V
C
OUT4
330µF × 3
2.5V
C
OUT2
330µF × 3
2.5V
C
IN3
22µF × 2
27.4k
59k
3.92k
2.2nF
LTC3861-1
FB1
COMP1
VSNSP
VSNSN
VSNSOUT
COMP2
FB2
RUN1
I
LIM1
SGND
ISNS1P
ISNS1N
ISNS2N
ISNS2P
SGND
I
LIM2
RUN2
V
CC
SS1
VINSNS
CONFIG
I
AVG
PGOOD1
PWMEN1
PWM1
SS2 FREQ CLKIN CLKOUT PHSMD PGOOD2 PWMEN2 PWM2
RUN1
RUN2
V
CC
V
OUT1
V
OUT2
V
CC
5V
100k
499Ω
2.2nF
100pF
30.1k
0.1µF
1µF
V
IN
7V TO 14V
LTC4449
IN
V
CC
L1
0.47µH
L2
0.47µH
D1
0.22µF
0.22µF
2.87k
M2
2.87k
V
CC
100k
0.047µF
3.57k
2.2nF
499Ω
2.2nF
100pF
20k
20k
20k
V
IN
4.7µF
V
LOGIC
V
CC
BOOST
GND
TG
TS
BG
C
IN1
180µF
38611 TA03
0.22µF
BSC010NE2LS
× 2
M1
BSC050NE2LS
× 2
LTC4449
IN
V
CC
D2
M4
V
IN
4.7µF
V
LOGIC
V
CC
BOOST
GND
TG
TS
BG
0.22µF
BSC010NE2LS
× 2
M3
BSC050NE2LS
× 2
59k