參數(shù)資料
型號(hào): LT1425IS
廠商: LINEAR TECHNOLOGY CORP
元件分類: 穩(wěn)壓器
英文描述: Isolated Flyback Switching Regulator with 9V Output
中文描述: 1.9 A SWITCHING REGULATOR, 320 kHz SWITCHING FREQ-MAX, PDSO16
封裝: 0.150 INCH, PLASTIC, SOP-16
文件頁(yè)數(shù): 2/20頁(yè)
文件大?。?/td> 341K
代理商: LT1425IS
2
LT1425
ABSOLUTE
AXI
U
RATIU
W
(Note 1)
Supply Voltage ........................................................ 20V
Switch Voltage......................................................... 35V
SHDN, SYNC Pin Voltage........................................... 7V
R
FB
Pin Current....................................................... 2mA
Operating Junction Temperature Range
Commercial .......................................... 0
°
C to 100
°
C
Industrial ......................................... –40
°
C to 100
°
C
Storage Temperature Range................. –65
°
C to 150
°
C
Lead Temperature (Soldering, 10 sec)..................300
°
C
W
W
PACKAGE/ORDER I
FOR
ATIO
W
U
U
T
JMAX
= 145
°
C,
θ
JA
= 75
°
C/W
TOP VIEW
S PACKAGE
16-LEAD PLASTIC SO
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
GND
NC
R
FB
V
C
R
REF
SYNC
SGND
GND
GND
SHDN
R
OCOMP
R
CCOMP
V
IN
V
SW
PGND
GND
ORDER PART
NUMBER
LT1425CS
LT1425IS
ELECTRICAL CHARACTERISTICS
V
IN
= 5V, T
J
= 25
°
C, V
SW
open, V
C
= 1.4V, unless otherwise specified.
SYMBOL
Feedback Amplifier
I
REF
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Reference Current
Measured at R
FB
Pin with R
REF
= 3.000k
402
396
408
414
420
μ
A
μ
A
nA
G
I
IN
g
m
I
SOURCE
, I
SINK
Feedback Amplifier Source or Sink Current
V
CL
Feedback Amplifier Clamp Voltage
Reference Voltage/Current Line Regulation
Voltage Gain
V
IN
Sense Error
Output Switch
BV
Output Switch Breakdown Voltage
V(V
SW
)
Output Switch ON Voltage
I
LIM
Switch Current Limit
R
REF
Pin Input Current
Feedback Amplifier Transconductance
500
1000
50
1.9
0.01
500
10
I
C
=
±
10
μ
A (Note 2)
G
400
30
1600
80
μ
mho
G
μ
A
V
5V
V
IN
18V
(Note 3)
G
0.04
%/V
V/V
mV
G
25
I
C
= 5mA
I
SW
= 1A
Duty Cycle = 50%, 0
°
C
T
J
100
°
C
Duty Cycle = 50%, –40
°
C
T
J
100
°
C
Duty Cycle = 80%
G
35
50
0.55
1.60
1.60
1.30
V
V
A
A
A
G
0.85
1.9
1.9
G
G
1.35
1.25
Current Amplifier
Control Pin Threshold
Duty Cycle = Minimum
0.95
0.85
1.2
1.3
1.4
V
V
G
Control Voltage to Switch Transconductance
2
A/V
Timing
f
Switching Frequency
260
240
170
285
300
320
260
kHz
kHz
ns
ns
ns
%
G
t
ON
t
ED
t
EN
Minimum Switch ON Time
Flyback Enable Delay Time
Minimum Flyback Enable Time
Maximum Switch Duty Cycle
210
150
180
90
G
85
95
Consult factory for Military grade parts.
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