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| LTC1754-5_15 Datasheet, PDF (4/12 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 LTC1754-5, TA = 25°C unless otherwise noted.
Output Voltage vs Output Current
5.15
TA = 25°C
COUT = 10µF
5.10 CFLY = 1µF
5.05
VIN = 3V
5.00
VIN = 2.7V
4.95
4.90
No Load Supply Current
vs Supply Voltage
20
IOUT = 0µA
CFLY = 1µF
VSHDN = VIN
TA = 85°C
15
TA = 25°C
10
TA = â40°C
Supply Current vs VSHDN
25
TA = 25°C
IOUT = 0µA VIN = 5.5V
20
VIN = 3.3V
15
VIN = 2.7V
10
5
4.85
0
20
40
60
80 100
OUTPUT CURRENT (mA)
1574-5 G02
5
2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
1754 G11
0
1
2
3
4
5
6
VSHDN CONTROL VOLTAGE (V)
1574 G12
VOUT Short-Circuit Current
vs Supply Voltage
220
TA = 25°C
CFLY = 1µF
200
180
160
140
120
100
2.5
3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
1754 G13
Load Transient Response
Output Ripple
Efficiency vs Load Current
100
VIN = 3V
90 TA = 25°C
80 CFLY = 1µF
70
60
50
40
30
20
10
0
0.001
0.01 0.1
1
10 100
LOAD CURRENT (mA)
1754-5 G05
Start-Up Time
IOUT
0mA to 50mA
25mA/DIV
VOUT
AC COUPLED
50mV/DIV
VOUT
AC COUPLED
20mV/DIV
SHDN
5V/DIV
VOUT
1V/DIV
VIN = 3V
COUT = 10µF
50µs/DIV
1754 G16
VIN = 3V
COUT = 10µF
IOUT = 50mA
5µs/DIV
1754 G17
VIN = 3V
COUT = 10µF
100µs/DIV
1754 G18
4
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