LTC3850-2 Datasheet, PDF (33/36 Pages) Linear Technology – Dual, 2-Phase Synchronous Step-Down Switching Controller

LTC3850-2
TYPICAL APPLICATIONS
V_OUT1
1.8V
5A
1Ω
4.7μF
M1
L1
0.75μH
0.1μF
D3 _{VIN PGOOD EXTVCC INTVCC}
D4
TG1
TG2
BOOST1
BOOST2
SW1
SW2
BG1
LTC3850-2
BG2
1.2k
1%
PLLIN
750kHz
MODE/PLLIN
PGND
2.94k
1%
47pF
0.047μF
SENSE1⁺
FREQ/PLLFLTR
SENSE2⁺
SENSE1^–
SENSE2^–
RUN1
RUN2
25.5k
1%
C_OUT1
20k
100μF
1%
X2
2200pF
14k
1%
V_FB1
I_TH1
V_FB2
I_TH2
100pF ^{TK/SS1 SGND TK/SS2}
1nF
0.1μF
0.1μF
L1, L2: TOKO FDV0630 0.75μH
M1, M2: VISHAY SILICONIX Si4816BDY
C_OUT1, C_OUT2: TAIYO YUDEN JMK325BJ107MM
0.1μF
4.7μF
6.3V
2x
M2
L2
0.75μH
1.2k
1%
0.047μF
4.99k
1%
100pF
10nF
10k
1%
2200pF
14k
1%
10k
100pF ^1%
20k
1%
38502 F19
5V ± 0.5V
V_OUT2
1.2V
5A
C_OUT2
100μF
X2
Figure 19. 1.8V/5A, 1.2V/5A Core-I/O Converter with a 5V Input Synchronized at 750kHz
38502f
33