參數資料
型號: LT3579IUFD-1#PBF
廠商: LINEAR TECHNOLOGY CORP
元件分類: 穩(wěn)壓器
英文描述: SWITCHING REGULATOR, PQCC20
封裝: 4 X 5 MM, LEAD FREE, PLASTIC, MO-220, QFN-20
文件頁數: 36/40頁
文件大?。?/td> 503K
代理商: LT3579IUFD-1#PBF
LT3579/LT3579-1
5
35791f
Typical perForMance characTerisTics
Switch Current Limit
vs Temperature
Commanded Switch Current vs SS
Positive Feedback Voltage
Oscillator Frequency
Oscillator Frequency During
Soft-Start
CLKOUT Duty Cycle
Switch Current Limit
Switch Saturation Voltage
Switch Current Sharing
DUTY CYCLE (%)
20
0
SW1
+
SW2
CURRENT
(A)
6
7
8
9
5
4
3
2
1
10
60
70
80
30
40
35791 G01
50
SW1 + SW2 CURRENT (A)
0
SA
TURA
TION
VOL
TAGE
(mV)
300
250
150
200
100
50
350
4
5
6
7
8
1
2
35791 G02
3
VSW1 = VSW2
SW1 CURRENT (A)
0
0.0
0.1
I SW2
/I SW1
(A/A)
0.8
0.9
0.6
0.7
0.4
0.5
0.2
0.3
1.0
3
3.5
4
1
1.5
0.5
35791 G03
2
2.5
TEMPERATURE (°C)
–50
0
SW1
+
SW2
CURRENT
(A)
8
9
7
6
5
4
3
2
1
10
–25
75 100 125 150
0
25
35791 G04
50
TA = 25°C, unless otherwise noted.
SS VOLTAGE (V)
0
SW1
+
SW2
CURRENT
(A)
9
5
6
7
8
4
3
2
1
10
0.6
0.8
1
1.2
0.2
35791 G05
0.4
TEMPERATURE (°C)
–50
1.2
FB
VOL
TAGE
(V)
1.225
1.22
1.215
1.21
1.205
1.23
–25
50
75 100 125 150
0
35791 G06
25
TEMPERATURE (°C)
–50
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
2.2
2.4
2.6
2.8
FREQUENCY
(MHz)
3.0
–25
100 125 150
0
25
50
35791 G07
75
RT = 432k
RT = 34k
FB VOLTAGE (V)
0
NORMALIZED
OSCILLA
TOR
FREQUENCY
(F
SW
/F
NOM
)
1/6
1/5
1/4
1/3
1/2
1
0.6
0.8
1
1.2
0.2
0.4
35791 G08
BOOSTING
CONFIGURATIONS
INVERTING
CONFIGURATIONS
TEMPERATURE (°C)
–50
0
CLKOUT
DUT
YCYCLE
(%)
70
60
50
40
30
20
80
–25
75 100 125 150
0
25
35791 G09
50
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