LTC3851-1_15 Datasheet, PDF (9/28 Pages) Linear Technology – Synchronous Step-Down Switching Regulator Controller

LTC3851-1
FUNCTIONAL DIAGRAM
FREQ/PLLFLTR
MODE/PLLIN
100k
V_IN
+
V_IN
C_IN
PLL-SYNC
MODE/SYNC
DETECT
0.8V
–+
5V REG
OSC
5k
I_CMP
S
RQ
–
I_REV
+
SLOPE COMPENSATION
PULSE SKIP
BURSTEN
ON SWITCH
LOGIC
AND
ANTI-
SHOOT
THROUGH
RUN
OV
INTV_CC
UVLO
BOOST
TG
C_B
SW
SENSE⁺ D_B
SENSE^–
INTV_CC
BG
C_VCC
GND
PGOOD
M1
L1
M2
V_OUT
+
C_OUT
1
100k
I_THB
0.72V
R2
UV
V_FB
V_IN
SLEEP
0.8V
REF
–+
0.4V
R1
OV
– ^SS +
– ^RUN +
EA
1μA
0.88V
0.64V
1.25V
2μA
I_TH
R_C
C_C1
RUN
TK/SS
C_SS
38511 FD
38511fa
9