1046 查看數據表（PDF） - Linear Technology
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1046 Datasheet PDF : 12 Pages
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LTC1046
TYPICAL PERFOR A CE CHARACTERISTICS (Using Test Circuit in Figure 1)
Output Resistance vs
Oscillator Frequency
500
400
TVA+
=
=
25°C
5V
IL = 10mA
300
C1 = C2
= 1µF
200
C1 = C2
C1 = C2
= 10µF
= 100µF
100
0
100
1k
10k
100k
OSCILLATOR FREQUENCY, fOSC (Hz)
1046 G01
Power Conversion Efficiency vs
Load Current for V+ = 2V
100
10
90
PEFF
9
80
8
70
7
IS
60
6
50
5
40
4
30
20
10
0
01
3
VTA+
=
=
25°C
2V
2
C1 = C2 = 10µF 1
fOSC = 8kHz
0
2 3 4 5 6 7 8 9 10
LOAD CURRENT, IL (mA)
1046 G04
Output Voltage vs Load Current
for V+ = 2V
2.5
2.0
VTA+
=
=
25°C
2V
1.5
fOSC = 8kHz
C1 = C2 = 10µF
1.0
0.5
0.0
–0.5
–1.0
–1.5
SLOPE = 52Ω
–2.0
–2.5
0 2 4 6 8 10 12 14 16 18 20
LOAD CURRENT, IL (mA)
1046 G07
Output Resistance vs
Supply Voltage
1000
TA = 25°C
IL = 3mA
COSC = 100pF
100
COSC = 0pF
10
0
1 23 4 567
SUPPLY VOLTAGE, V+ (V)
1046 G02
Power Conversion Efficiency vs
Load Current for V+ = 5V
100
100
90
90
PEFF
80
80
70
70
60
60
50
50
40
IS
40
30
30
20
VTA+
=
=
25°C
5V
20
10
C1 = C2 = 10µF 10
fOSC = 30kHz
0
0
0 10 20 30 40 50 60 70
LOAD CURRENT, IL (mA)
1046 G05
Output Voltage vs Load Current
for V+ = 5V
5
4
VTA+
=
=
25°C
5V
3
fOSC = 30kHz
C1 = C2 = 10µF
2
1
0
–1
–2
–3
–4
SLOPE = 27Ω
–5
0 10 20 30 40 50 60 70 80 90 100
LOAD CURRENT, IL (mA)
1046 G08
Output Resistance vs
Temperature
80
C1 = C2 = 10µF
70
60
V+ = 2V, COSC = 0pF
50
40
V+ = 5V, COSC = 0pF
30
20
10
–55 –25 0 25 50 75 100 125
AMBIENT TEMPERATURE (°C)
1046 G03
Power Conversion Efficiency vs
Oscillator Frequency
100
98
A
96
94
C
92
B
90
E
88
A = 100µF, 1mA
B = 100µF, 15mA
C = 10µF, 1mA
D = 10µF, 15mA
E = 1µF, 1mA
F = 1µF, 15mA
V + = 5V
TA = 25°C
C1 = C2
86
84
D
F
82
80
100
1k
10k
100k
1M
OSCILLATOR FREQUENCY, fOSC (Hz)
1046 G06
Oscillator Frequency as a
Function of COSC
100
V + = 5V
TA = 25°C
PIN 1 = V+
10
PIN 1 = OPEN
1
0.1
1
10
100
1000 10000
EXTERNAL CAPACITOR (PIN 7 TO GND), COSC (pF)
1046 G09
3
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