LTC1983-3/LTC1983-5
U
U
U
PI FU CTIO S
VIN (Pin 1): Charge Pump Input Voltage. May be between
2.3V and 5.5V. VIN should be bypassed with a ≥4.7µF low
ESR capacitor as close as possible to the pin for best
performance.
C– (Pin4):ChargePumpFlyingCapacitorNegativeTermi-
nal. This node is switched between GND and VOUT (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.
V
OUT (Pin 2): Regulated Output Voltage for the IC. VOUT
should be bypassed with a ≥4.7µF low ESR capacitor as
close as possible to the pin for best performance.
SHDN (Pin 6): Shutdown. Grounding this pin shuts down
the IC. Tie to VIN to enable. This pin should not be pulled
above the VIN voltage or below GND.
C+ (Pin 3): Charge Pump Flying Capacitor Positive Termi-
nal. This node is switched between VIN and GND (It is
connected to VCC during shutdown).
W
BLOCK DIAGRA
LTC1983-X
V
IN
C
IN
10µF
S1A
+
C
S2A
CLOCK1
CLOCK2
C
FLY
SHDN
1µF
CONTROL
LOGIC
V
S1B
REF
–
C
+
–
S2B
V
OUT
CHARGE PUMP
COMP1
C
OUT
1µA
10µF
1983 BD
sn1983 1983fs
5
Linear Systems [ Linear Systems ]
