LTC1144 查看數據表（PDF） - Linear Technology
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LTC1144 Datasheet PDF : 12 Pages
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LTC1144
Typical Performance Characteristics
Output Resistance
vs Supply Voltage
300
TA = 25°C
250
200
150
100
50
0
2 4 6 8 10 12 14 16 18
SUPPLY VOLTAGE (V)
LTC1144 • TPC01
Oscillator Frequency as a
Function of COSC
1000
VTA+
=
=
25°C
15V
100
BOOST = V+
10
Output Resistance vs
Temperature
140
120
V+ = 5V
100
IL = 3mA
80
60
V+ = 15V
40
IL = 20mA
20
–55 –25
0 25 50 75 100 125
TEMPERATURE (°C)
LTC1144 • TPC02
Oscillator Frequency
vs Temperature
1000
VTA+
=
=
25°C
15V
BOOST = V+
100
Oscillator Frequency
vs Supply Voltage
1000
TA = 25°C
COSC = 0
BOOST = V+
100
BOOST = OPEN OR GROUND
10
1
2 4 6 8 10 12 14 16 18
SUPPLY VOLTAGE (V)
LTC1144 • TPC03
Output Voltage vs Load Current
0
VTA+
=
=
25°C
15V
C1 = C2 = 10µF
BOOST = OPEN
–5
1
BOOST = OPEN OR GROUND
0.1
BOOST = OPEN OR GROUND
10
–10
ROUT = 56Ω
0.01
1
10
100
1000 10000
EXTERNAL CAPACITANCE (PIN 7 TO GND), COSC (pF)
LTC1144 • TPC04
1
–55 –25
0 25 50 75 100 125
TEMPERATURE (°C)
LTC1144 • TPC05
–15
0
10 20 30 40 50 60
LOAD CURRENT (mA)
LTC1144 • TPC06
Output Voltage vs Load Current
0
VTA+
=
=
25°C
5V
–1
C1 = C2 = 10µF
BOOST = OPEN
–2
–3
ROUT = 90Ω
–4
–5
0
5 10 15 20 25 30
LOAD CURRENT (mA)
LTC1144 • TPC07
Supply Current as a Function of
Oscillator Frequency
10000
TA = 25°C
C1 = C2 = 10µF
1000
V+ = 15V
100
V+ = 5V
10
1
0.01
0.1
1
10
100
OSCILLATOR FREQUENCY (kHz)
LTC1144 • TPC08
Power Conversion Efficiency and
Supply Current vs Load Current
100
100
PEFF
80
80
IS
60
60
40
40
VTA+
=
=
25°C
15V
20
C1 = C2 = 10µF
20
BOOST = OPEN
(SEE TEST CIRCUIT)
0
0
0
10
20
30
40
50
LOAD CURRENT (mA)
LTC1144 • TPC09
1144fa
4
For more information www.linear.com/LTC1144
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