参数资料
型号: LT1508ISW#TR
厂商: LINEAR TECHNOLOGY CORP
元件分类: 稳压器
英文描述: POWER FACTOR CONTROLLER WITH POST REGULATOR, 115 kHz SWITCHING FREQ-MAX, PDSO20
封装: 0.300 INCH, PLASTIC, SO-20
文件页数: 12/16页
文件大小: 300K
代理商: LT1508ISW#TR
5
LT1508
TYPICAL PERFORMANCE CHARACTERISTICS
U
W
Reference Voltage
vs Temperature
Supply Current vs Supply Voltage
GTDR Rise and Fall Time
Start-Up Supply Current
vs Supply Voltage
MOUT Pin Characteristics
Frequency vs RSET and CSET
GTDR1 Maximum Duty Cycle
vs RSET and CSET
Multiplier Current
JUNCTION TEMPERATURE (
°C)
–75
REFERENCE
VOLTAGE
(V)
75
7.536
7.524
7.512
7.500
7.488
7.476
7.464
7.452
7.440
7.428
1508 G04
–50
150
–25
0
25
50
100 125
IAC (A)
0
I M
(
A)
300
150
0
1508 G05
250
500
VAOUT = 7V
VAOUT = 6.5V
VAOUT = 6V
VAOUT = 5.5V
VAOUT = 5V
VAOUT = 4.5V
VAOUT = 4V
VAOUT = 3.5V
VAOUT = 3V
VAOUT = 2.5V
SUPPLY VOLTAGE (V)
10
SUPPLY
CURRENT
(mA)
16
15
14
13
12
11
10
9
8
7
6
5
1508 G06
21
32
TJ = 25°C
TJ = 125°C
TJ = –55°C
LOAD CAPACITANCE (nF)
0
TIME
(ns)
400
300
200
100
0
10
20
30
40
1508 G07
50
RISE TIME
NOTE: GTDR SLEWS
BETWEEN 1V AND 16V
FALL TIME
SUPPLY VOLTAGE (V)
0
SUPPLY
CURRENT
(
A)
550
500
450
400
350
300
250
200
150
100
50
0
1508 G08
20
125
°C
–55
°C
25
°C
4
812
16
26
10
14
18
CSET CAPACITANCE (pF)
200
FREQUENCY
(kHz)
500
450
400
350
300
250
200
150
100
50
0
1508 G09
1400
2200
600
1000
1800
RSET = 10k
RSET = 15k
RSET = 20k
RSET = 30k
CSET CAPACITANCE (pF)
200
MAXIMUM
DUTY
CYCLE
1.00
0.99
0.98
0.97
0.96
0.95
0.94
0.93
0.92
0.91
0.90
1508 G10
1400
2200
600
1000
1800
RSET = 10k
RSET = 15k
RSET = 20k
RSET = 30k
MOUT VOLTAGE (V)
M
OUT
CURRENT
(mA)
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
–2.0
–2.5
–3.0
–3.5
–4.0
1508 G11
2.4
1.2
0
–1.2
–2.4
TJ = 125°C
TJ = 25°C
TJ = –55°C
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