LT3431 Просмотр технического описания (PDF) - Linear Technology
Номер в каталоге
Компоненты Описание
производитель
LT3431 Datasheet PDF : 28 Pages
| |||
LT3431
ABSOLUTE AXI U RATI GS
(Note 1)
Input Voltage (VIN) ................................................. 60V
BOOST Pin Above SW ............................................ 35V
BOOST Pin Voltage ................................................. 68V
SYNC Voltage ........................................................... 7V
SHDN Voltage ........................................................... 6V
BIAS Pin Voltage .................................................... 30V
FB Pin Voltage/Current .................................. 3.5V/2mA
Operating Junction Temperature Range
LT3431EFE (Notes 8, 10) ................. – 40°C to 125°C
LT3431IFE (Notes 8, 10) ................. – 40°C to 125°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
GND 1
SW 2
VIN 3
VIN 4
SW 5
BOOST 6
NC 7
GND 8
16 GND
15 SHDN
14 SYNC
13 NC
12 FB
11 VC
10 BIAS
9 GND
FE PACKAGE
16-LEAD PLASTIC TSSOP
TJMAX = 125°C, θJA = 45°C/ W, θJC (PAD) = 10°C/W
EXPOSED PAD MUST BE SOLDERED
TO GROUND PLANE
ORDER PART
NUMBER
LT3431EFE
LT3431IFE
FE PART MARKING
3431EFE
3431IFE
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
The q denotes specifications which apply over the full operating temperature range, otherwise specifications are at TJ = 25°C.
VIN = 15V, VC = 1.5V, SHDN = 1V, BOOST open circuit, SW open circuit, unless otherwise noted.
PARAMETER
CONDITIONS
MIN TYP MAX
Reference Voltage (VREF)
FB Input Bias Current
5.5V ≤ VIN ≤ 60V
VOL + 0.2 ≤ VC ≤ VOH – 0.2
1.204 1.219 1.234
q 1.195
1.243
q
–0.2 –1.5
Error Amp Voltage Gain
(Note 2)
200 475
Error Amp gm
dl (VC) = ±10µA
1650 2200 3300
q 1000
4200
VC to Switch gm
EA Source Current
EA Sink Current
VC Switching Threshold
VC High Clamp
Switch Current Limit
3.4
FB = 1V or VSENSE = 4.1V
FB = 1.4V or VSENSE = 5.7V
Duty Cycle = 0
q 125 275 450
q 100 275 500
0.8
SHDN = 1V
2.1
VC Open, BOOST = VIN + 5V, FB = 1V or VSENSE = 4.1V –40°C␣ ≤ Tj ≤ 25°C
(Note 9)
Tj = 125°C
3.0 5 6.5
2.5 4 5.5
Switch On Resistance
ISW = 2.5A, BOOST = VIN + 5V (Note 7)
0.1 0.14
q
0.18
Maximum Switch Duty Cycle FB = 1V or VSENSE = 4.1V
88 92
q 80
Switch Frequency
VC Set to Give DC = 50%
460 500 540
q 430 500 570
fSW Line Regulation
fSW Shifting Threshold
5.5V ≤ VIN ≤ 60V
Df = 10kHz
q
0.05 0.15
0.8
UNITS
V
V
µA
V/V
µMho
µMho
A/V
µA
µA
V
V
A
A
Ω
Ω
%
%
kHz
kHz
%/V
V
2
sn3431 3431fs
Share Link: 