LTC3868-1 Datasheet, PDF (10/38 Pages) Linear Technology – Low IQ, Dual 2-Phase Synchronous Step-Down Controller

LTC3868-1
FUNCTIONAL Diagram
PGOOD1
FREQ
20µA
0.88V
V_FB1
0.72V
VCO
CLK2
CLK1
PFD
PLLIN/MODE
100k
SYNC
DET
V_IN
EXTV_CC
+
4.7V ^–
5.1V
LDO
EN
5.1V
LDO
EN
SGND
INTV_CC
DUPLICATE FOR SECOND
CONTROLLER CHANNEL
BOOST
INTV_CC V_IN
D_B
DROP
OUT
DET
BOT
SQ
TOP ON
TG
TOP
SW
RQ
SHDN
INTV_CC
SWITCH
LOGIC _BOT
BG
PGND
C_B
D
C_IN
C_OUT
0.425V ⁺
–
SLEEP
ICMP
–+
2(V_FB)
0.45V
+ ^IR
–
3mV
SENSE⁺
SENSE^–
SLOPE COMP
V_FB
EA 0.80V
TRACK/SS
OV
0.88V
I_TH
L
R_B
R_A
C_C
R_SENSE
0.5µA
SHDN
RST
2(V_FB)
FOLDBACK
RUN
11V
SHORT CKT
LATCH-OFF
SHDN
10µA
1µA _SS
C_C2 R_C
C_SS
38681 FD
V_OUT
38681fb
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