LTC3851_15 Datasheet, PDF (9/28 Pages) Linear Technology – Synchronous Step-Down Switching Regulator Controller

FUNCTIONAL DIAGRAM
FREQ/PLLFLTR
MODE/PLLIN
100k
PLL-SYNC
MODE/SYNC
DETECT
0.8V
–+
5V REG
OSC
S
RQ
PULSE SKIP
BURSTEN
5k
–
I_CMP
I_REV
+
I_LIM
ON SWITCH
LOGIC
AND
ANTI-
SHOOT
THROUGH
RUN
OV
SLOPE COMPENSATION
INTV_CC
UVLO
1
100k
I_THB
V_IN
SLEEP
0.8V
REF
–+
0.4V
OV
– ^SS +
– ^RUN +
EA
1μA
0.64V
1.25V
I_TH
R_C
C_C1
RUN
TK/SS
C_SS
LTC3851
V_IN
+
V_IN
C_IN
BOOST
TG
C_B
SW
SENSE⁺ D_B
SENSE^–
INTV_CC
BG
C_VCC
GND
M1
L1
V_OUT
+
C_OUT
M2
R2
V_FB
R1
0.88V
2μA
3851 FD
3851fb
9