LTC3834 Linear Technology, LTC3834 Datasheet - Page 9

• Manufacturer Part Number: LTC3834
• Description: Synchronous Step-Down Controller
• Manufacturer: Linear Technology

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PIN FUNCTIONS
operation. Tying this pin to a voltage greater than 0.9V and
less than INTV
PHASMD (Pin 20/Pin 18): Control Input to Phase Selector
which determines the phase relationships between TG and
the CLKOUT signal.
FUNCTIONAL DIAGRAM
INTV
V
IN
+
CC
10k
EXTV
INTV
F
R
C
SGND
CLKOUT
PGOOD
IN
LP
V
LP
IN
CC
CC
PLLIN/MODE
PHASMD
PLLLPF
PLLIN/
MODE
INTV
CC
4.7V
CC
– 0.5V
OSCILLATOR
PHASE DET
0.8V
selects pulse-skipping operation.
+
–
–
+
–
+
INTERNAL
SUPPLY
5.25V/
7.5V
LDO
CLK
–
+
–
+
FC
BURSTEN
(FE/UFD)
0.88V
0.72V
V
FB1
RUN
6V
0.5μA
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
1μA
SENSE
SENSE
BOOST
PGND
SW
V
I
TG
BG
TH
FB
+
–
INTV
CC
C
D
R
B
B
A
C
C
R
C2
SS
B
C
L
C
V
IN
R
C
LTC3834
R
D
SENSE
C
IN
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