LTC3864 Datasheet, PDF (9/28 Pages) Linear Technology – 60V Low IQ Step-Down DC/DC Controller with 100% Duty Cycle Capability

FUNCTIONAL DIAGRAM
LTC3864
0.4µA
RUN
RUN
+
–
1.26V –
CLOCK
PLLIN/MODE _MODE/CLOCK
DETECT
FREQ
20µA _VCO
R_FREQ
V_OUT
R_PGD
SGND
PGOOD
DELAY
100µs
PGND
UVLO
3.25V
V_IN
SENSE
V_IN
C_IN
R_SENSE
Q
SR
PLL
SYSTEM
LOGIC
CONTROL
ICMP
–+
Burst Mode
OPERATION
O.425V
DRV
IN
LDO
OUT
V_IN – 8V
+
10µA
SLOPE
COMPENSATION
OV
O.88V
UV
O.72V
0.8V
EA
(G_m = 1.8mS)
ITH
R_ITH
C_ITH1
GATE
CAP
MP
L
C_CAF
D1
V_OUT
C_OUT
SS
C_SS
V_FB
3864 FD
R_FB2
R_FB1
3864f
9