參數資料
型號: LT1941EFE
廠商: LINEAR TECHNOLOGY CORP
元件分類: 穩(wěn)壓器
英文描述: Triple Monolithic Switching Regulator
中文描述: 6 A SWITCHING REGULATOR, 1350 kHz SWITCHING FREQ-MAX, PDSO28
封裝: 4.40 MM, PLASTIC, TSSOP-28
文件頁數: 4/24頁
文件大?。?/td> 336K
代理商: LT1941EFE
4
LT1941
1941f
The
G
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T
A
= 25
°
C.
V
IN
, V
BIAS1
, V
BIAS2
= 5V, V
BOOST1
, V
BOOST2
= 8V, unless otherwise noted. (Note 2)
PARAMETER
CONDITIONS
NFB4 Voltage (V
FB4
-V
NVB4
)
MIN
1.212
1.205
150
TYP
1.24
MAX
1.258
1.260
UNITS
V
V
G
FB3 Pin Output Current
PGOOD3 Threshold Offset
Error Amplifier Transconductance
Error Amplifier Voltage Gain
V
C
Switching Threshold
V
C3
to Switch Current Gain
Frequency Shift Threshold on FB3
Switch 3 Current Limit (Note 5)
Switch 3 V
CESAT
BIAS2 Pin Current
Switch 3 Leakage Current
Maximum Duty Cycle
V
FB3
= 1.35V, V
NFB
= –0.1V
V
FB
Rising
G
350
120
800
150
1.1
5
0.65
2
240
30
0.01
86
μ
A
mV
μ
Mhos
V/V
V
A/V
V
A
G
1.5
2.9
320
45
10
I
SW
= 1A
I
SW
= 1A
mV
mA
μ
A
%
G
77
ELECTRICAL CHARACTERISTICS
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2:
The LT1941E is guaranteed to meet performance specifications
from 0
°
C to 70
°
C. Specifications over the –40
°
C to 85
°
C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 3:
Current limit is guaranteed by design and/or correlation to static
test. Slope compensation reduces current limit at higher duty cycles.
Note 4:
This is the minimum voltage across the boost capacitor needed to
guarantee full saturation of the internal power switch.
Note 5:
Current limit is guaranteed by design and/or correlation to static
test.
Note 6:
This IC includes overtemperature protection that is intended to
protect the device during momentary overload conditions. Junction
temperature will exceed 125
°
C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.
Note 7:
Guaranteed by design, not 100% tested.
TYPICAL PERFOR U
Efficiency, V
OUT1
= 1.8V
LOAD CURRENT (A)
0
E
70
80
2
1941 G01
60
50
0.5
1
1.5
2.5
90
V
IN
= 5V
T
A
= 25
°
C
Efficiency, V
OUT2
= 3.3V
Efficiency, V
OUT3
= –12V
LOAD CURRENT (A)
0
50
E
60
70
80
90
0.25
0.5
0.75
1
1941 G07
1.25
1.5
V
IN
= 5V
T
A
= 25
°
C
LOAD CURRENT (mA)
0
50
E
60
70
80
90
50
100
150
200
1941 G08
250
300
V
IN
= 5V
T
A
= 25
°
C
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