參數(shù)資料
型號(hào): LTC1503CMS8-2#TR
廠商: LINEAR TECHNOLOGY CORP
元件分類: 電源模塊
英文描述: 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
封裝: PLASTIC, MSOP-8
文件頁數(shù): 7/12頁
文件大小: 187K
代理商: LTC1503CMS8-2#TR
4
LTC1503-1.8/LTC1503-2
TYPICAL PERFOR A CE CHARACTERISTICS
UW
LTC1503-X Output Short-Circuit
Current vs Input Voltage
LTC1503-X Start-Up Time
vs Soft-Start Capacitor
INPUT VOLTAGE (V)
2
OUTPUT
CURRENT
(mA)
20
30
6
1503-1.8/2 G10
10
0
3
4
5
40
VOUT SHORTED TO GND
TA = –40°C
TA = 85°C
TA = 25°C
SOFT-START CAPACITOR (nF)
0.01
START-UP
TIME
(ms)
1
10
100
1503-1.8/2 G10
0.1
0.01
0.1
1
10
100
VIN = 3.6V
TA = –40°C
TA = 25°C
TA = 85°C
Output Load Transient Response
(LTC1503-1.8,1mA to 100mA Step)
IOUT
50mA/DIV
VOUT
50mV/DIV
AC COUPLED
100mA
1mA
1ms/DIV
1503-1.8/2 G12
Output Ripple, COUT = 10F
VOUT
10mV/DIV
AC COUPLED
5
s/DIV
1503-1.8/2 G13
VIN = 3.6V
VOUT = 2V
IOUT = 100mA
COUT = 10F CERAMIC
Output Ripple, COUT = 22F
VOUT
10mV/DIV
AC COUPLED
5
s/DIV
1503-1.8/2 G14
VIN = 3.6V
VOUT = 2V
IOUT = 100mA
COUT = 22F CERAMIC
VOUT (Pin 1): Regulated Output Voltage. VOUT is discon-
nected from VIN during shutdown. Bypass VOUT to ground
with a
≥10F low ESR capacitor.
C1(Pin 2): Flying Capacitor One Negative Terminal.
C1+ (Pin 3): Flying Capacitor One Positive Terminal.
VIN (Pin 4): Input Voltage. VIN may be between 2.4V and
6V. Bypass VIN to ground with a ≥10F low ESR capacitor.
SHDN/SS (Pin 5): Shutdown/Soft-Start Control. The pin
is designed to be driven with an external open-drain
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 VIN once
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 VOUT. By selecting
an appropriate soft-start capacitor for a known output
capacitor, the user can control the inrush current during
UU
U
PI FU CTIO S
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