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LTC3850-2 Datasheet, PDF (9/36 Pages) Linear Technology – Dual, 2-Phase Synchronous Step-Down Switching Controller | |||
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LTC3850-2
FUNCTIONAL DIAGRAM
FREQ/PLLFLTR MODE/PLLIN
PLL-SYNC
MODE/SYNC
DETECT
EXTVCC
4.7V
â+
F
0.8V
5V
REG
â+
F
OSC
3k
ICMP
S
RQ
â
IREV
+
FCNT
BURSTEN
ON
SWITCH
LOGIC
AND
ANTI-
SHOOT
THROUGH
RUN
OV
SLOPE COMPENSATION
INTVCC
UVLO
VIN
VIN
+
CIN
INTVCC
BOOST
TG
CB
SW
SENSE+ DB
SENSEâ
BG
CVCC
PGND
PGOOD
INTVCC
M1
L1
VOUT
+
COUT
M2
1
SLOPE RECOVERY
51k
ACTIVE CLAMP
ITHB
0.74V
UV
R2
VFB
VIN
SLEEP
0.8V
REF
EA
â+
0.55V
â SS +
0.64V
â RUN +
1.2V
OV
1.3μA
R1
0.86V
SGND
0.5μA
ITH RC CC1
RUN
TK/SS
CSS
38502 FD
38502f
9
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