LTC3865 Datasheet, PDF (28/36 Pages) Linear Technology – Dual, 2-Phase Synchronous DC/DC Controller with Pin Selectable Outputs

LTC3865/LTC3865-1
Applications Information
VID11
I_TH1
LTC3865
V_OSENSE1
SENSE1⁺
SENSE1^–
TK/SS1
PGOOD
VID12
VID21
VID22
TG1
SW1
FREQ
I_LIM
f_IN
MODE/PLLIN
RUN1
RUN2
SGND
SENSE2^–
SENSE2⁺
BOOST1
BG1
V_IN
PGND
EXTV_CC
INTV_CC
BG2
V_OSENSE2
I_TH2
TK/SS2
BOOST2
SW2
TG2
R_PU2
V_PULL-UP
PGOOD
L1
R_SENSE
C_B1
M1
M2
D1
C_INTVCC
R_IN
C_VIN
V_IN
CERAMIC
C_IN
CERAMIC
C_OUT1
C_OUT2
M3
M4
D2
C_B2
R_SENSE
L2
3865 F12
Figure 12. Recommended Printed Circuit Layout Diagram
V_OUT1
GND
V_OUT2
28
SW1
D1
V_IN
R_IN
C_IN
BOLD LINES INDICATE
HIGH SWITCHING
CURRENT. KEEP LINES
TO A MINIMUM LENGTH.
SW2
D2
L1
R_{SENSE1 VOUT1}
C_OUT1
L2
R_{SENSE2 VOUT2}
C_OUT2
Figure 13. Branch Current Waveforms
R_L1
R_L2
3865 F13
3865f