LTC3855 LINER [Linear Technology], LTC3855 Datasheet - Page 13

• Manufacturer Part Number: LTC3855
• Description: Dual, Fast, Accurate Step-Down DC/DC Controller
• Manufacturer: LINER [Linear Technology]

INTV
FUNCTIONAL DIAGRAM
MODE/PLLIN
R
CC
CLKOUT
R
PGOOD
PGD
RUN
T
RT
DUPLICATE DASHED
LINE BOX FOR
CHANNEL 2
GENERATOR
CLOCK PLL/
MODE/CLK
DETECT
1-2μA
PTAT
DELAY
FORCED
CONTINUOUS
MODE
~0.8V
5μA
1.2V
CLK1
CLK2
SENSE
+
–
+
–
TO CHANNEL 2
250k
250k
–
V
IN
UV
OV
EN_DRV
ONE-SHOT
DETECTOR
+
–
+
–
PHASE
TIMER
ON-TIME
ADJUST
0.555V
0.645V
INTV
CC
g
START
STOP
m
V
RNG
UVLO
+
I
g
CMP
m
I
C
TH
ITH1
C
–
ITH2
CONTROL
INTV
LOGIC
EA
+
+
–
+
–
CC
R
R
ITH2
ITH1
1/2 INTV
+
0.6V
4.2V
I
DTR
REV
EN
V
CC
IN
OUT SD
INTV
–
LDO
IN
1μA
CC
+
–
BG DRV
DIFFAMP
(A = 1)
+
–
DRV
CHANNEL 2 ONLY
TG
+
–
~4.6V
DETECTION
RELEASE
LOAD
V
V
OUTSENSE1 +
OUTSENSE1 –
TRACK/SS
DRV
DRV
SENSE
SENSE
EXTV
PGND
BOOST
INTV
V
TG
BG
TO LOGIC
CONTROL
SW
CC2
CC1
FB2
CC
CC
+
–
SGND
DRV
C
D
C
DRVCC
B
SS
CC
C
INTVCC
C
B
M
M
T
B
L
LTC3838
R
SENSE
C
13
OUT
3838 FD
3838fa
R
R
FB2
FB1
V
V
IN
OUT