LTC1550L Ver la hoja de datos (PDF) - Linear Technology
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LTC1550L Datasheet PDF : 12 Pages
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LTC1550L/LTC1551L
TYPICAL PERFORMANCE CHARACTERISTICS
Oscillator Frequency vs
Temperature
975
VCC = 5V
VOUT = –4.1V
925
875
825
775
725
Supply Current vs Temperature
5.0
VCC = 5V
VOUT = – 4.1V
4.5
4.0
3.5
3.0
675
–55 –35 –15 5 25 45 65 85 105 125
TEMPERATURE (˚C)
1550L/51L G01
Maximum Output Current
vs Supply Voltage
80
70 TA = 25°C
60
50
40
30
20 VOUT = –2V
VOUT = –2.5V
10
0
2.25
VOUT = –4.1V
2.75 3.25 3.75 4.25 4.75 5.25
SUPPLY VOLTAGE (V)
1550L/51L G04
2.5
–55 –35 –15 5 25 45 65 85 105 125
TEMPERATURE (°C)
1550L/51L G02
Start-Up Time vs Supply Voltage
2.5
TA = 25°C
2.0
1.5
VOUT = –4.1V
RL = 820Ω
1.0
VOUT = –2V
RL = 390Ω
0.5
0
2.25
2.75 3.25 3.75 4.25 4.75 5.25
SUPPLY VOLTAGE (V)
1550L/51L G05
Startup Time (LTC1550L Shown)
Load Transient Response
(See Figure 3, VCC = 5V)
Minimum Required VCC
vs VOUT and IOUT
6.0
5.6
5.2
4.8
IOUT = 20mA
4.4
4.0
3.6
3.2
IOUT = 5mA
IOUT = 10mA
2.8
2.4
2.0
–5
–4
–3
–2
–1
0
OUTPUT VOLTAGE (V)
1550L/51L G03
Reference Voltage vs VCC + |VOUT|
1.24
1.238 TA = 25°C
1.236
1.234
1.232
1.230
1.228
1.226
1.224
1.222
1.220
1.218
4 4.5 5 5.5 6 6.5 7 7.5 8 8.5 9 9.5 10
VCC + |VOUT| (V)
1550L/51L G06
Line Transient Response
(See Figure 3, IL = 10mA)
5V
SHDN
0V
0V
VOUT
– 4.1V
5V
POWER VALID
0V
0.2ms/DIV
VOUT
5mV/DIV
AC
COUPLED
10mA
IOUT
0mA
1550/51 G07
1ms/DIV
VOUT
5mV/DIV
AC
COUPLED
VCC
5.25V
4.75V
1550/51 G08
2ms/DIV
1550/51 G09
4
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