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| LTC1751 Datasheet, PDF (4/12 Pages) Linear Technology – Micropower, Regulated Charge Pump DC/DC Converters" | |||
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LTC1751/LTC1751-3.3/LTC1751-5
TYPICAL PERFOR A CE CHARACTERISTICS
(LTC1751-3.3)
Power Efficiency vs Load Current
100
TA = 25°C
90 CFLY = 1µF
80 COUT = 10µF
VIN = 2V
70
VIN = 2.75V
60
50
VIN = 3.3V
40
VIN = 4.4V
Short-Circuit Output Current
vs Input Voltage
250
TA = 25°C
CFLY = 1µF
200
150
30
100
20
10
0
0.001
0.01 0.1
1
10 100
LOAD CURRENT (mA)
1751 G04
50
2.0
2.5 3.0 3.5 4.0 4.5
INPUT VOLTAGE (V)
1751 G05
Start-Up
Output Ripple
Load Transient Response
SHDN
2V/DIV
PGOOD
5V/DIV
VOUT
1V/DIV
CSS = 10nF
2ms/DIV
VOUT
AC COUPLED
50mV/DIV
1751 G06
VIN = 2.5V
IOUT = 80mA
COUT = 10µF
5µs/DIV
IOUT
40mA/DIV
VOUT
AC COUPLED
50mV/DIV
1751 G07
VIN = 2.5V
50µs/DIV
1751 G08
(LTC1751-5)
Output Voltage vs Output Current
5.2
TA = 25°C
CFLY = 1µF
5.1
5.0
VIN = 3V
VIN = 2.7V
4.9
No Load Supply Current
vs Input Voltage
40
CFLY = 1µF
IOUT = 0
VSHDN = VIN
30
TA = 85°C
20
TA = 25°C
TA = â40°C
10
4.8
0
50
100
150
OUTPUT CURRENT (mA)
200
1751 G09
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
1751 G10
4
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