LTC3868-1 Datasheet, PDF (31/38 Pages) Linear Technology – Low IQ, Dual 2-Phase Synchronous Step-Down Controller

Typical ApplicationS
High Efficiency Dual 2.5V/3.3V Step-Down Converter
LTC3868-1
R_B1
143k
C_F1
22pF C1
R_A1
1nF
68.1k
C_ITH1A 100pF
LTC3868-1
SENSE1⁺
SENSE1^–
V_FB1
PGOOD1
BG1
SW1
R_ITH1 22k
I_TH1
C_ITH1 820pF _{CSS1 0.01µF}
SS1
BOOST1
TG1
V_IN
INTV_CC
C_ITH2 820pF
C_SS2 0.01µF
PLLIN/MODE
SGND
EXTV_CC
RUN1
RUN2
FREQ
PGND
TG2
BOOST2
SS2
SW2
R_ITH2 15k
I_TH2
BG2
INTV_CC
100k
C_B1
0.47µF
D1
C_INT
4.7µF
D2
C_B2
0.47µF
R_A2
68.1k
C_ITH2A 150pF
C2
C_{F2 1nF}
15pF
V_FB2
SENSE2^–
SENSE2⁺
R_B2
215k
C_OUT1, C_OUT2: SANYO 10TPD150M
L1: SUMIDA CDEP105-2R5
L2: SUMIDA CDEP105-3R2M
MTOP1, MTOP2, MBOT1, MBOT2: VISHAY Si7848DP
MBOT1
L1
2.4µH
MTOP1
R_SENSE1
7mΩ
V_IN
C_IN ^{4V TO 24V}
22µF
C_OUT1
150µF
V_OUT1
2.5V
5A
MTOP2
L2
R_SENSE2
3.2µH 7mΩ
MBOT2
V_OUT2
3.3V
C_OUT2 5A
150µF
38681 F13
38681fb
31