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| LTC1754-3.3 Datasheet, PDF (3/12 Pages) Linear Technology – Micropower, Regulated 3.3V/5V Charge Pump with Shutdown in SOT-23 | |||
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LTC1754-3.3/LTC1754-5
TYPICAL PERFOR A CE CHARACTERISTICS LTC1754-3.3, TA = 25°C unless otherwise noted.
Output Voltage vs Output Current
3.40
TA = 25°C
COUT = 10µF
CFLY = 1µF
3.35
VIN = 2.5V
3.30
VIN = 2V
3.25
No Load Supply Current
vs Supply Voltage
20
IOUT = 0µA
CFLY = 1µF
VSHDN = VIN
15
TA = 85°C
TA = 25°C
10
TA = â 40°C
Supply Current vs VSHDN
20
TA = 25°C
IOUT = 0µA
15
VIN = 2.5V
VIN = 4.5V
10
VIN = 2V
5
3.20
0
20
40
60
80 100
OUTPUT CURRENT (mA)
1754 G01
5
2.0 2.5
3.0
3.5
4.0
4.5
SUPPLY VOLTAGE (V)
1754 G02
0
1
2
3
4
5
VSHDN CONTROL VOLTAGE (V)
1754 G03
VOUT Short-Circuit Current
vs Supply Voltage
180
TA = 25°C
CFLY = 1µF
160
140
120
100
80
60
2.0
2.5
3.0
3.5
4.0
4.5
SUPPLY VOLTAGE (V)
1735 G04
Load Transient Response
Output Ripple
Efficiency vs Load Current
100
TA = 25°C
90 VIN = 2V
80 CFLY = 1µF
70
60
50
40
30
20
10
0
0.001
0.01 0.1
1
10 100
LOAD CURRENT (mA)
1754 G05
Start-Up Time
IOUT
0mA to 20mA
10mA/DIV
VOUT
AC COUPLED
20mV/DIV
VIN = 2V
COUT = 10µF
50µs/DIV
VOUT
AC COUPLED
20mV/DIV
1754 G07
VIN = 2V
COUT = 10µF
IOUT = 20mA
5µs/DIV
SHDN
1V/DIV
VOUT
1V/DIV
1754 G08
VIN = 2V
COUT = 10µF
200µs/DIV
1754 G9
3
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