Datasheet

LTC1983-3/LTC1983-5
5
1983fa
UU
U
PI FU CTIO S
V
IN
(Pin 1): Charge Pump Input Voltage. May be between
2.3V and 5.5V. V
IN
should be bypassed with a ≥4.7µF low
ESR capacitor as close as possible to the pin for best
performance.
V
OUT
(Pin 2): Regulated Output Voltage for the IC. V
OUT
should be bypassed with a ≥4.7µF low ESR capacitor as
close as possible to the pin for best performance.
C
+
(Pin 3): Charge Pump Flying Capacitor Positive Termi-
nal. This node is switched between V
IN
and GND (It is
connected to V
CC
during shutdown).
C
–
(Pin 4): Charge Pump Flying Capacitor Negative Termi-
nal. This node is switched between GND and V
OUT
(It is
connected to GND during shutdown).
GND (Pin 5): Signal and Power Ground for the 6-Pin
SOT-23 package. This pin should be tied to a ground plane
for best performance.
SHDN (Pin 6): Shutdown. Grounding this pin shuts down
the IC. Tie to V
IN
to enable. This pin should not be pulled
above the V
IN
voltage or below GND.
BLOCK DIAGRA
W
CONTROL
LOGIC
CLOCK2
CLOCK1
S1A
S2A
S1B
S2B
–
+
V
REF
CHARGE PUMP
SHDN
V
IN
C
IN
10µF
C
FLY
1µF
C
OUT
10µF
LTC1983-X
C
+
C
–
V
OUT
COMP1
1µA
1983 BD