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LTC1550L Datasheet(PDF) 4 Page - Linear Technology

Part No. LTC1550L
Description  Low Noise, Switched Capacitor Regulated Voltage Inverters
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Maker  LINER [Linear Technology]
Homepage  http://www.linear.com
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4
LTC1550L/LTC1551L
TYPICAL PERFORMANCE CHARACTERISTICS
Supply Current vs Temperature
Oscillator Frequency vs
Temperature
OUTPUT VOLTAGE (V)
–5
6.0
5.6
5.2
4.8
4.4
4.0
3.6
3.2
2.8
2.4
2.0
–1
1550L/51L G03
–4
–3
–2
0
IOUT = 20mA
IOUT = 10mA
IOUT = 5mA
Minimum Required VCC
vs VOUT and IOUT
TEMPERATURE (˚C)
–55 –35 –15
5
25
45
65
85 105 125
875
925
975
1550L/51L G01
825
775
725
675
VCC = 5V
VOUT = –4.1V
TEMPERATURE (
°C)
1550L/51L G02
VCC = 5V
VOUT = –4.1V
–55 –35 –15
5
25
45
65
85 105 125
5.0
4.5
4.0
3.5
3.0
2.5
Reference Voltage vs VCC + |VOUT|
Start-Up Time vs Supply Voltage
Maximum Output Current
vs Supply Voltage
Load Transient Response
(See Figure 3, VCC = 5V)
Line Transient Response
(See Figure 3, IL = 10mA)
5V
0V
– 4.1V
VOUT
SHDN
0.2ms/DIV
1550/51 G07
Startup Time (LTC1550L Shown)
0V
5V
0V
POWER VALID
0mA
1ms/DIV
1550/51 G08
10mA
VOUT
5mV/DIV
AC
COUPLED
IOUT
4.75V
2ms/DIV
1550/51 G09
VOUT
5mV/DIV
AC
COUPLED
5.25V
VCC
SUPPLY VOLTAGE (V)
2.25
2.75
3.25
3.75
4.25
4.75
5.25
1550L/51L G04
80
70
60
50
40
30
20
10
0
TA = 25°C
VOUT = –2V
VOUT = –2.5V
VOUT = –4.1V
SUPPLY VOLTAGE (V)
2.25
2.75
3.25
3.75
4.25
4.75
5.25
1550L/51L G05
2.5
2.0
1.5
1.0
0.5
0
TA = 25°C
VOUT = –2V
RL = 390Ω
VOUT = –4.1V
RL = 820Ω
1.24
1.238
1.236
1.234
1.232
1.230
1.228
1.226
1.224
1.222
1.220
1.218
VCC + |VOUT| (V)
456789
10
4.5
5.5
6.5
7.5
8.5
9.5
1550L/51L G06
TA = 25°C




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