LTC1430AIGN 데이터 시트보기 (PDF) - Linear Technology
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LTC1430AIGN Datasheet PDF : 24 Pages
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LTC1430A
TYPICAL PERFOR A CE CHARACTERISTICS
IMAX Pin Sink Current
vs Temperature
14.0
VCC = 5V
13.5
13.0
12.5
12.0
11.5
11.0
Oscillator Frequency
vs Temperature
240
VCC = 5V
230 FREQSET FLOATING
220
210
200
190
180
Maximum Duty Cycle
vs Temperature
100
VCOMP = VCC
VFB = 1.265V
95
90
85
80
75
10.5
– 40 –20
0 20 40 60
TEMPERATURE (°C)
80 100
1430 G01
170
– 40 –20
0 20 40 60
TEMPERATURE (°C)
80 100
1430 G02
70
– 40 – 20
0 20 40 60
TEMPERATURE (°C)
80 100
1430 G03
Error Amplifier Transconductance
vs Temperature
850
800
gm
=
∆ICOMP
∆VFB
750
700
650
600
550
500
450
400
350
– 40 – 20
0 20 40 60
TEMPERATURE (°C)
80 100
1430 G04
∆VFB vs Temperature
10
VCC = 5V
8
6
4
2
0
–2
–4
–6
–8
– 10
– 40 – 20
0 20 40 60
TEMPERATURE (°C)
80 100
1430 G05
Load Regulation
0.4
TA = 25°C
0.2
VOUT = 3.3V
VCC = 5V
FIGURE 4
0
– 0.2
– 0.4
– 0.6
– 0.8
– 1.0
0 1 2 3 4 5 6 7 8 9 10
LOAD CURRENT (A)
1460 G06
Output Voltage vs Load Current
with Current Limit
4.0
3.5
3.0
Supply Current
vs Oscillator Frequency
1000
100
TA = 25°C
VCC = 5V
FIGURE 4
IPVCC (LOADED
WITH 10,000pF,
PVCC = 12V)
2.5
2.0
RI(MAX) = 10k RI(MAX) = 16k
1.5
1.0
0.5
TA = 25°C
VCC = 5V
FIGURE 4
0
0
2
4
6
8
LOAD CURRENT (A)
10 12
1430 G07
10
IPVCC (NO LOAD,
PVCC = 12V)
IPVCC (NO LOAD,
1
PVCC = 5V)
IVCC
0.1
0
100 200 300 400 500
OSCILLATOR FREQUENCY (kHz)
1430 G08
4
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