Datasheet

LTC3850/LTC3850-1
33
38501fc
TYPICAL APPLICATIONS
Figure 19. 1.8V/5A, 1.2V/5A Core-I/O Converter with a 5V Input Synchronized at 750kHz
Figure 20. 2.5V/5A, 1.2V/5A Core-I/O Converter with Dual Inputs
D3
D4
M1
0.1µF
25.5k
1%
L1
0.75µH
1.2k
1%
2200pF
100pF
0.047µF
0.047µF
4.7µF
6.3V
2x
C
OUT1
100µF
X2
L1, L2: TOKO FDV0630 0.75µH
M1, M2: VISHAY SILICONIX Si4816BDY
C
OUT1
, C
OUT2
: TAIYO YUDEN JMK325BJ107MM
20k
1%
14k
1%
V
OUT1
1.8V
5A
M2
0.1µF
10k
1%
L2
0.75µH
4.99k
1%
2200pF
10nF
100pF
C
OUT2
100µF
X2
20k
1%
14k
1%
10k
1%
V
OUT2
1.2V
5A
TG1 TG2
BOOST1 BOOST2
SW1 SW2
BG1
BG2
SGND
PGND
FREQ/PLLFLTR
SENSE1
+
SENSE2
+
RUN2
SENSE1
SENSE2
V
FB1
V
FB2
I
TH1
I
TH2
V
IN
PGOOD INTV
CC
TK/SS1 TK/SS2
5V ± 0.5V
38501 F19
EXTV
CC
0.1µF
0.1µF
LTC3850
MODE/PLLIN
I
LIM
RUN1
1.2k
1%
2.94k
1%
4.7µF
100pF47pF
1nF
PLLIN
750kHz
1Ω
D3
D4
M1
0.1µF
43.2k
1%
L1
2.2µH
1.2k
1%
2200pF
100pF
0.1µF
0.1µF
4.7µF
2x
C
OUT1
100µF
X2
L1: TOKO FDV0630 2.2µH
L2: TOKO FDV0630 0.75µH
M1, M2: VISHAY SILICONIX Si4816BDY
C
OUT1
, C
OUT2
: TAIYO YUDEN JMK325BJ107MM
20k
1%
10k
1%
V
OUT1
2.5V
5A
M2
0.1µF
10k
1%
L2
0.75µH
4.32k
1%
2200pF
100pF
C
OUT2
100µF
X2
20k
1%
6.04k
1%
3.16k
1%
V
OUT2
1.2V
5A
TG1 TG2
BOOST1 BOOST2
SW1 SW2
BG1
BG2
SGND
PGND
FREQ/PLLFLTR
SENSE1
+
SENSE2
+
RUN2
SENSE1
SENSE2
V
FB1
V
FB2
I
TH1
I
TH2
V
IN
PGOOD INTV
CC
TK/SS1 TK/SS2
V
IN2
3.3V
38501 F20
EXTV
CC
0.1µF
0.1µF
LTC3850
MODE/PLLIN
I
LIM
RUN1
3.74k
1%
10k
1%
1.40k
1%
4.7µF
100pF47pF
2.2Ω
4.7µF
1µF
V
IN1
12V
13.0k
10k