LTC3855_15 Datasheet, PDF (11/44 Pages) Linear Technology – Dual, Multiphase Synchronous DC/DC Controller with Differential Remote Sense

Functional Block Diagram
FREQ
MODE/PLLIN
PHASMD
ITEMP
EXTV_CC
4.7V
TEMPSNS
–+
PLL-SYNC
MODE/SYNC
DETECT
F
0.6V
5V
REG
–+
F
CLKOUT
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
51k
I_THB
V_IN
SLEEP
0.6V
REF
–+
0.55V
SLOPE RECOVERY
UV
ACTIVE CLAMP
OV
– ^SS +
– ^RUN +
EA
1.2µA
0.5V
1.2V
I_{TH RC} ^CC1
RUN
TK/SS
C_SS
LTC3855
V_IN
V_IN
+
C_IN
INTV_CC
BOOST
TG
C_B
SW
SENSE⁺ DB
SENSE^–
BG
C_VCC
PGND
PGOOD
0.54V
R2
V_FB
INTV_CC
M1
L1
V_OUT
+
C_OUT
M2
DIFFP
DIFFAMP
40k
40k
R1
0.66V
SGND
40k
40k ^DIFFN
1µA
3855 FBD
DIFFOUT
3855f
11