LT1425 Просмотр технического описания (PDF) - Linear Technology
Номер в каталоге
Компоненты Описание
Список матч
LT1425 Datasheet PDF : 20 Pages
| |||
LT1425
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Supply Voltage ........................................................ 20V
Switch Voltage ......................................................... 35V
SHDN, SYNC Pin Voltage ........................................... 7V
RFB 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
PACKAGE/ORDER INFORMATION
GND 1
NC 2
RFB 3
VC 4
RREF 5
SYNC 6
SGND 7
GND 8
TOP VIEW
16 GND
15 SHDN
14 ROCOMP
13 RCCOMP
12 VIN
11 VSW
10 PGND
9 GND
S PACKAGE
16-LEAD PLASTIC SO
TJMAX = 145°C, θJA = 75°C/ W
Consult factory for Military grade parts.
ORDER PART
NUMBER
LT1425CS
LT1425IS
ELECTRICAL CHARACTERISTICS VIN = 5V, TJ = 25°C, VSW open, VC = 1.4V, unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX
Feedback Amplifier
IREF
Reference Current
Measured at RFB Pin with RREF = 3.000k
402 408 414
q 396
420
IIN
gm
ISOURCE, ISINK
VCL
RREF Pin Input Current
Feedback Amplifier Transconductance
Feedback Amplifier Source or Sink Current
Feedback Amplifier Clamp Voltage
Reference Voltage/Current Line Regulation
Voltage Gain
∆IC = ±10µA (Note 2)
5V ≤ VIN ≤ 18V
(Note 3)
q 400
q 30
q
500
1000 1600
50
80
1.9
0.01 0.04
500
VIN Sense Error
Output Switch
q
10
25
BV
V(VSW)
ILIM
Output Switch Breakdown Voltage
Output Switch ON Voltage
Switch Current Limit
IC = 5mA
q 35
50
ISW = 1A
q
0.55 0.85
Duty Cycle = 50%, 0°C ≤ TJ ≤ 100°C
q 1.35 1.60
1.9
Duty Cycle = 50%, – 40°C ≤ TJ ≤ 100°C q 1.25 1.60
1.9
Duty Cycle = 80%
1.30
Current Amplifier
Control Pin Threshold
Duty Cycle = Minimum
0.95 1.2
1.3
q 0.85
1.4
Control Voltage to Switch Transconductance
2
Timing
f
Switching Frequency
260 285 300
q 240
320
tON
Minimum Switch ON Time
tED
Flyback Enable Delay Time
tEN
Minimum Flyback Enable Time
Maximum Switch Duty Cycle
170 210 260
150
180
q 85
90
95
UNITS
µA
µA
nA
µmho
µA
V
%/ V
V/ V
mV
V
V
A
A
A
V
V
A/V
kHz
kHz
ns
ns
ns
%
2
Share Link: 