LTC3850-2 Datasheet, PDF (34/36 Pages) Linear Technology – Dual, 2-Phase Synchronous Step-Down Switching Controller

LTC3850-2
TYPICAL APPLICATIONS
V_OUT1
2.5V
5A
V_IN1
12V
4.7μF
2.2Ω
1μF
13.0k
V_IN2
3.3V
4.7μF
2x
L1
2.2μH
3.74k
1%
47pF
4.7μF
M1
0.1μF
1.40k
1%
0.1μF
D3 _{VIN PGOOD EXTVCC INTVCC}
TG1
TG2
BOOST1
BOOST2
SW1
SW2
BG1
LTC3850-2
BG2
MODE/PLLIN
PGND
SENSE1⁺
FREQ/PLLFLTR
SENSE2⁺
SENSE1^–
RUN1
SENSE2^–
RUN2
10k
D4
0.1μF
10k
1%
0.1μF
M2
L2
0.75μH
1.2k
1%
4.32k
1%
100pF
43.2k
1%
C_OUT1
20k
100μF
1%
X2
2200pF
10k
1%
V_FB1
I_TH1
100pF ^TK/SS1
0.1μF
L1: TOKO FDV0630 2.2μH
L2: TOKO FDV0630 0.75μH
M1, M2: VISHAY SILICONIX Si4816BDY
C_OUT1, C_OUT2: TAIYO YUDEN JMK325BJ107MM
SGND
V_FB2
I_TH2
TK/SS2
0.1μF
3.16k
1%
2200pF
6.04k
1%
100pF
20k
1%
10k
1%
38502 F20
V_OUT2
1.2V
5A
C_OUT2
100μF
X2
Figure 20. 2.5V/5A, 1.2V/5A Core-I/O Converter with Dual Inputs
38502f
34