LTC1503CS8-1.8 Linear Technology, LTC1503CS8-1.8 Datasheet - Page 4

• Manufacturer Part Number: LTC1503CS8-1.8
• Description: IC BUCK/SW CAP 1.8V .1A 8SOIC
• Manufacturer: Linear Technology
• Type: Step-Down (Buck), Switched Capacitor (Charge Pump)r

Specifications of LTC1503CS8-1.8

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.8V
• Current - Output: 100mA
• Frequency - Switching: 600kHz
• Voltage - Input: 2.4 ~ 6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -

LTC1503-1.8/LTC1503-2
50mA/DIV
PI FU CTIO S
V
nected from V
with a 10 F low ESR capacitor.
C1
C1
V
6V. Bypass V
SHDN/SS (Pin 5): Shutdown/Soft-Start Control. The pin
is designed to be driven with an external open-drain
TYPICAL PERFOR A CE CHARACTERISTICS
AC COUPLED
4
OUT
IN
50mV/DIV
–
+
U
I
100mA
(Pin 4): Input Voltage. V
OUT
(Pin 2): Flying Capacitor One Negative Terminal.
(Pin 3): Flying Capacitor One Positive Terminal.
V
1mA
(Pin 1): Regulated Output Voltage. V
OUT
Output Load Transient Response
(LTC1503-1.8,1mA to 100mA Step)
U
IN
IN
to ground with a 10 F low ESR capacitor.
during shutdown. Bypass V
10
40
30
20
0
U
2
1ms/DIV
LTC1503-X Output Short-Circuit
Current vs Input Voltage
V
OUT
SHORTED TO GND
W
IN
3
T
A
T
INPUT VOLTAGE (V)
A
= –40 C
may be between 2.4V and
= 85 C
U
1503-1.8/2 G12
4
AC COUPLED
T
A
10mV/DIV
= 25 C
OUT
OUT
5
V
OUT
1503-1.8/2 G10
is discon-
to ground
Output Ripple, C
V
V
I
C
OUT
IN
OUT
OUT
= 3.6V
6
= 100mA
= 2V
= 10 F CERAMIC
output. Holding the SHDN/SS pin below 0.25V will force
the part into shutdown mode. An internal pull-up current
of 2 A will force the SHDN/SS voltage to climb to V
the device driving the pin is forced into a Hi-Z state. To
limit inrush current on start-up, connect a capacitor
between the SHDN/SS pin and ground. Capacitance on
the SHDN/SS pin will limit the dV/dt of the pin during turn-
on which, in turn, will limit the dV/dt of V
an appropriate soft-start capacitor for a known output
capacitor, the user can control the inrush current during
5 s/DIV
OUT
= 10 F
0.01
100
0.1
10
1
0.01
1503-1.8/2 G13
LTC1503-X Start-Up Time
vs Soft-Start Capacitor
V
IN
= 3.6V
SOFT-START CAPACITOR (nF)
AC COUPLED
0.1
10mV/DIV
V
OUT
T
A
T
A
= –40 C
Output Ripple, C
1
V
V
I
C
OUT
IN
OUT
OUT
= 85 C
= 3.6V
= 100mA
= 2V
= 22 F CERAMIC
T
A
10
= 25 C
1503-1.8/2 G10
5 s/DIV
OUT
100
OUT
. By selecting
= 22 F
IN
1503-1.8/2 G14
once