LTC3809-1_15 Datasheet, PDF (8/24 Pages) Linear Technology – No RSENSE, Low Input Voltage, Synchronous DC/DC Controller with Output Tracking

LTC3809-1
FUNCTIONAL DIAGRAM
V_IN
C_IN
9 V_IN
RUN
5
VOLTAGE
V_REF
REFERENCE
0.6V
UNDERVOLTAGE
LOCKOUT
V_IN
V_IN
0.7μA
SLOPE
6 IPRG
+
SENSE⁺
ICMP
–
UVSD
t = 0.74ms
INTERNAL
SOFT-START
V_IN
0.15V
GND
11
1μA
0.3V
TRACK/SS
2
MUX TRK/SS
CLK S
Q
R
OSC
SWITCHING
LOGIC AND
BLANKING
CIRCUIT
+
FCB
SLEEP
–
OV
I_REV
BURSTDIS
UV
GND
ANTI-SHOOT-
THROUGH
PV_IN
MODE
1
BURST DEFEAT
BURSTDIS
FCB
EAMP
I_REV
RICMP
TG
8
MP
10 ^SW
7 ^BG
L
C_OUT
MN
V_OUT
0.68V
R_B
0.54V
V_FB
I_TH
4
R_C
V_REF
0.6V
C_C
TRK/SS
3 ^VFB
SW
R_A
38091 FD
GND
38091fc
8