LTC3856_15 Datasheet, PDF (11/40 Pages) Linear Technology – 2-Phase Synchronous Step-Down DC/DC Controller with Diffamp

FUNCTIONAL Diagram
LTC3856
MODE PLLIN PHASMD
ITEMP
EXTV_CC
4.7V
FREQ
MODE/SYNC
DETECT
PLL-SYNC
TEMPSNS
F
0.6V
5V
REG
F
CLKOUT
ISET
I_LIM
OSC
3k
I_CMP
S
RQ
–
+ ^IREV
ISET ISET
SLOPE
COMPENSATION
INTV_CC
UVLO
1
51k
SLOPE RECOVERY
I_THB
ACTIVE CLAMP
FCNT
ON
BURSTEN
SWITCH
LOGIC
AND
ANTISHOOT-
THROUGH
RUN
OV
UV
SLEEP
V_IN
0.6V
REF
0.55V
3856 FD
ISET
SS
RUN
EA
0.5V
1.22V
OV
1.25µA
I_{TH RC} ^CC1
RUN TK/SS CSS
V_IN
INTV_CC
BOOST
TG
SW
SENSE⁺
SENSE^–
BG
PGND
+
C_IN
D_B
C_B
C_VCC
V_IN
INTV_CC
M1
L1
M2
V_OUT
+ COUT
PGOOD
0.54V
V_FB
DIFFOUT
R2
DIFFAMP
R_AVP
DIFFP
40k
40k
R1
0.66V
SGND
40k
R_PRE-AVP
AVP
1µA
40k ^DIFFN
SENSE1⁺
SENSE1^–
SENSE2⁺
SENSE2^–
3856f
11