LTC3822-1 Datasheet, PDF (8/24 Pages) Linear Technology – No RSENSE, Low Input Voltage, Synchronous Step-Down DC/DC Controller

LTC3822-1
FUNCTIONAL DIAGRAM
V_IN
V_IN
C_IN
SENSE ^–
VOLTAGE
V_REF
REFERENCE
0.6V
UNDERVOLTAGE
LOCKOUT
SLOPE
+
I_PRG
CLK
SENSE⁺
ICMP
–
S
Q
R
V_IN
V_IN
0.7µA
RUN
t = 1ms
INTERNAL
SOFT-START
UVSD
BG
BOOST
REFRESH
CLK
TIMEOUT
TRACK/SS
1µA MUX
TRK/SS
V_IN
+
+
0.15V
–
SYNC/MODE ^{BURST DEFEAT}
PLLLPF
CLOCK DETECT
BURSTDIS
FCB
PHASE
DETECTOR
V_IN
V_CO
CLK
PGOOD
GND
OV
UV
UVSD
+
0.3V
D_B
C_B
BOOST
TG
GND
SWITCHING
SW
LOGIC AND
ANTI-SHOOT-
BLANKING
THROUGH
CIRCUIT
BOOST
BG
SLEEP
GND
FCB
SW
I_REV
RICMP
GND
M1
L
C_OUT
M2
V_OUT
BURSTDIS
OV
0.68V
0.54V
UV
V_FB
I_TH
EAMP
V_REF
0.6V
TRK/
SS
V_FB
R_B
R_C
C_C
R_A
38221 FD
38221f
8