LTC3865-1_15 Datasheet, PDF (11/38 Pages) Linear Technology – Dual, 2-Phase Synchronous DC/DC Controller with Pin Selectable Outputs

FUNCTIONAL DIAGRAM
FREQ/FREQ
MODE/PLLIN
VID1
VID2
EXTV_CC
7.5μA
4.7V
INPUT VID LOGIC
AND
–+
RESISTIVE DIVIDERS
MODE/SYNC
0.6V
F
DETECT
5V
REG
PLL-SYNC
AND
–+
LPF
F
OSC
3k
I_CMP
S
RQ
–
I_REV
+
FCNT
BURSTEN
ON
SWITCH
LOGIC
AND
ANTI-
SHOOT
THROUGH
RUN
OV
I_LIM
SLOPE COMPENSATION
INTV_CC
UVLO
1
SLOPE RECOVERY
51k
ACTIVE CLAMP
I_THB
LTC3865/LTC3865-1
V_IN
V_IN
+
C_IN
INTV_CC
BOOST
TG
C_B
SW
SENSE⁺ DB
SENSE^–
BG
C_VCC
PGND
PGOOD
0.54V
V_OSENSE
UV
SGND
INTV_CC
M1
L1
V_OUT
+
C_OUT
M2
V_IN
SLEEP
0.6V
REF
EA
–+
0.5V
– ^SS +
0.5V
– ^RUN +
1.22V
V_FB
OV
0.66V
1.3μA
1μA
I_{TH RC} ^CC1
RUN
TK/SS ^CSS
3865 FBD
3865fb
11