LTC1502IMS8-3.3 Linear Technology, LTC1502IMS8-3.3 Datasheet - Page 4

• Manufacturer Part Number: LTC1502IMS8-3.3
• Description: IC DC/DC CONV 3.3V CHRGPMP 8MSOP
• Manufacturer: Linear Technology
• Type: Switched Capacitor (Charge Pump)r

Specifications of LTC1502IMS8-3.3

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 3.3V
• Current - Output: 10mA
• Frequency - Switching: 500kHz
• Voltage - Input: 0.9 ~ 1.8 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -

BLOCK
LTC1502-3.3
PIN
C2 (Pin 1): Charge Pump 1 (CP1) Output. This pin also
serves as the input supply for charge pump 2 (CP2). To
ensure proper start-up, the C2 pin must not be externally
loaded. Bypass the C2 pin with a 10 F low ESR capacitor
to ground.
C1
Terminal.
C1
tive Terminal and Shutdown Input. Pulling this pin to
ground through a 100 resistor will put the part into
shutdown mode. With a high resistance pull-down FET,
the series resistor may be eliminated. The external pull-
down device must be high impedance for normal opera-
tion (see Applications Information). Peak voltage present
on this pin is approximately equal to V
4
+
–
U
/SHDN (Pin 3): Charge Pump 1 Flying Capacitor Nega-
(Pin 2): Charge Pump 1 Flying Capacitor Positive
FUNCTIONS
C
IN
U
5
DIAGRAM
V
IN
COMP3
U
SHUTDOWN
W
U2
–
+
V
OUT
C2
SHDN
+
2.5 A
C1
0.55V
–
CONTROL
CONTROL
/SHDN
IN
TIMING
BIAS
CLK1/CLK2
.
HIZ1
3
CP1
C1
2
OSCEN
C1
INTERNAL
V
+
CC
400k
1M
V
U3
IN
1
GND (Pin 4): Ground. Connect to a ground plane for best
performance.
V
low ESR capacitor to ground.
C3
Negative Terminal.
C3
Terminal.
V
disconnected from V
with a 10 F low ESR capacitor to ground.
–
+
IN
OUT
C2
C2
+
–
(Pin 5): Input Supply Voltage. Bypass V
(Pin 7): Charge Pump 2 Flying Capacitor Positive
(Pin 6): Charge Pump 2 (CP2) Flying Capacitor
COMP2
(Pin 8): 3.3V Regulated Output Voltage. V
U4
C3
HIZ2
–
6
CP2
COMP1
C3
7
C3
IN
+
during shutdown. Bypass V
–
+
1.2V
REF
4
2.1M
1.2M
GND
1502-3.3 BD
IN
with a 10 F
8
OUT
C
V
OUT
OUT
OUT
is