LTC3727A-1 Datasheet, PDF (9/32 Pages) Linear Technology – High Efficiency, 2-Phase Synchronous Step-Down Switching Regulators

W
FU CTIO AL DIAGRA
LTC3727A-1
PLLIN
F_IN
100k
PLLFLTR
R_LP
C_LP
PGOOD
PHASE DET
DUPLICATE FOR SECOND
CONTROLLER CHANNEL
INTV_CC
V_IN
BOOST
D_B
OSCILLATOR
CLK1
CLK2
0.86V
V_OSENSE1
0.74V
0.86V
V_OSENSE2
DROP
OUT
DET
SQ
RQ
BOT FCB
TOP ON
TG
TOP
SW
SWITCH
LOGIC
INTV_CC
BG
BOT
0.55V
+B
–
SHDN
PGND
C_B
+
D₁
C_IN
C_OUT
R_SENSE
V_SEC
1.5V
0.18µA
R6
FCB
R5
7V –
+
+
–
0.74V
BINH
FCB
3.3V_OUT
0.8V
V_REF
V_IN
V_IN
EXTV_CC
INTV_CC
+^7.5V
SGND
7.3V +
–
7.5V
LDO
REG
INTERNAL
SUPPLY
I1
I2
INTV_CC
–
– ++ –
+
50k ^SENSE+
D_SEC
C_SEC
0.86V
3mV
4(V_FB)
50k ^SENSE–
SLOPE
COMP
25k
25k
2.4V
EA
OV
V_FB
0.80V
V_OSENSE
R2
R1
1.2µA
6V
0.86V
SHDN
RST
4(V_FB)
RUN
SOFT
START
I_TH
RUN/SS
C_C
C_C2
R_C
C_SS
V_OUT
3727 F02
Figure 2
3727a1f
9