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参数资料
| 型号： | LT1507IS8-3.3#TR |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 3 A SWITCHING REGULATOR, 570 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | 0.150 INCH, PLASTIC, SO-8 |
| 文件页数： | 15/20页 |
| 文件大小： | 291K |
| 代理商： | LT1507IS8-3.3#TR |
4
LT1507
Shutdown Pin Bias Current
JUNCTION TEMPERATURE (
°C)
–50
2.40
2.36
2.32
0.8
0.4
0
25
75
LT1507 TPC05
–25
0
50
100
125
SHUTDOWN
PIN
VOLTAGE
(V)
STANDBY
STARTUP
SHUTDOWN
Standby and Shutdown Thresholds
TYPICAL PERFORMANCE CHARACTERISTICS
U
W
INPUT VOLTAGE (V)
0
INPUT
SUPPLY
CURRENT
(
A)
5
10
15
20
25
30
369
12
LT1507 TPC06
15
VSHDN = 0V
Shutdown Supply Current
Error Amplifier Transconductance
TEMPERATURE (
°C)
–50
500
400
300
200
8
4
0
25
75
L11507 TPC04
–25
0
50
100
125
CURRENT
(
A)
CURRENT REQUIRED TO FORCE SHUTDOWN
(FLOWS OUT OF PIN). AFTER SHUTDOWN,
CURRENT DROPS TO A FEW
A
AT 2.38V STANDBY THRESHOLD
(CURRENT FLOWS OUT OF PIN)
JUNCTION TEMPERATURE (
°C)
–50
TRANSCONDUCTANCE
(
mho)
2500
2000
1500
1000
500
0
50
75
LT1507 TPC08
–25
25
100
125
SHUTDOWN VOLTAGE (V)
0
INPUT
SUPPLY
CURRENT
(
A)
150
125
100
75
50
25
0
0.1
0.2
0.3
0.4
LT1507 TPC07
0.5
VIN = 10V
FREQUENCY (Hz)
GAIN
(
mho)
PHASE
(DEG)
3000
2500
2000
1500
1000
500
200
150
100
50
0
–50
100
10k
100k
10M
LT1507 TPC09
1k
1M
GAIN
PHASE
ROUT
200k
COUT
12pF
VC
VFB × 2e
–3
ERROR AMPLIFIER EQUIVALENT CIRCUIT
RLOAD = 50
Error Amplifier Transconductance
Minimum Input Voltage
with 3.3V Output
Switching Frequency
FEEDBACK PIN VOLTAGE (V)
0
SWITCHING
FREQUENCY
(kHz)
OR
CURRENT
(
A) 500
400
300
200
100
0
2.0
LT1507 TPC10
0.5
1.0
1.5
2.5
SWITCHING
FREQUENCY
FEEDBACK PIN
CURRENT
Frequency Foldback
JUNCTION TEMPERATURE (
°C)
–50
600
550
500
450
400
100
LT1507 TPC11
–25
0
25
50
75
125
FREQUENCY
(kHz)
LOAD CURRENT (mA)
1
5.0
INPUT
VOLTAGE
(V)
5.5
6.0
6.5
10
100
1000
LT1507 TPC12
4.5
4.0
3.5
3.0
MINIMUM VOLTAGE
TO START WITH
STANDARD CIRCUIT
MINIMUM VOLTAGE
TO RUN WITH
STANDARD CIRCUIT
MINIMUM INPUT VOLTAGE CAN BE REDUCED
BY ADDING A SMALL EXTERNAL PNP. SEE
APPLICATIONS INFORMATION
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