LTC3835 Linear Technology, LTC3835 Datasheet - Page 9

• Manufacturer Part Number: LTC3835
• Description: Low IQ Synchronous Step-Down Controller
• Manufacturer: Linear Technology

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FUNCTIONAL DIAGRAM
PIN FUNCTIONS
PHASMD (Pin 20/Pin 18): Control Input to Phase Selector
which determines the phase relationships between TG and
the CLKOUT signal.
INTV
V
IN
+
10k
CC
EXTV
INTV
F
R
C
SGND
CLKOUT
PGOOD
IN
LP
V
LP
IN
CC
CC
PLLIN/MODE
PHASMD
PLLLPF
PLLIN/
MODE
INTV
4.7V
CC
-0.5V
OSCILLATOR
PHASE DET
0.8V
+
–
–
+
–
+
INTERNAL
SUPPLY
5.25V/
7.5V
LDO
CLK
–
+
–
+
FC
BURSTEN
(FE Package/UFD Package)
0.88V
0.72V
V
FB1
RUN
0.5μA
6V
2(V
0.45V
FB
SLOPE
COMP
ICMP
)
S
R
+
–
Q
Q
0.4V
–
DROP
OUT
DET
+
–
+
+
B
6mV
BOT
TOP ON
BURSTEN
Exposed Pad (Pin 21/Pin 21): SGND. Must be soldered
to the PCB.
–
SLEEP
SHDN
FC
+
–
OV
IR
EA
SWITCH
–
+
+
–
SHDN
LOGIC
V
FB
TRACK/SS
0.80V
0.88V
TOP
BOT
INTV
CC
TRACK/SS
SENSE
SENSE
BOOST
1μA
PGND
SW
V
TG
BG
I
TH
FB
+
–
INTV
CC
R
D
C
C
C
A
B
R
C2
SS
B
C
B
L
C
V
IN
R
LTC3835
C
R
D
SENSE
C
IN
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