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LT3957 датащи(PDF) 3 Page - Linear Technology

номер детали LT3957
подробное описание детали  Wide Input Voltage Range Boost/SEPIC/Inverting Converter with 6A, 40V Switch
PDF  24 Pages
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производитель  LINER [Linear Technology]
домашняя страница  http://www.linear.com
Logo LINER - Linear Technology

LT3957 датащи(HTML) 3 Page - Linear Technology

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LT3959
3
3959f
ELECTRICAL CHARACTERISTICS
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VIN Operating Voltage
l
1.6
40
V
VIN Start-Up Voltage
RT = 27.4kΩ, FBX = 0
l
2.5
2.65
V
VIN Shutdown IQ
EN/UVLO < 0.4V
EN/UVLO = 1.15V
0.1
1
6
μA
μA
VIN Operating IQ
350
450
μA
DRIVE Shutdown Quiescent Current
EN/UVLO < 0.4V
EN/UVLO = 1.15V
0.1
0.1
1
2
μA
μA
DRIVE Quiescent Current (Not Switching)
RT = 27.4kΩ, DRIVE = 6V
2.0
2.5
mA
SW Pin Current Limit
l
6.0
7.0
8.0
A
SW Pin On Voltage
ISW = 3A
100
mV
SW Pin Leakage Current
SW = 40V
5
μA
Error Amplifier
FBX Regulation Voltage (VFBX(REG))
FBX > 0V
FBX < 0V
l
l
1.580
–0.815
1.6
–0.80
1.620
–0.785
V
V
FBX Pin Input Current
FBX = 1.6V
FBX = –0.8V
–10
80
130
10
nA
nA
Transconductance gm (ΔIVC/ΔVFBX)
FBX = VFBX(REG)
240
μs
VC Output Impedance
5MΩ
FBX Line Regulation [ΔVFBX(REG)/(ΔVIN • VFBX(REG))]
1.6V < VIN < 40V, FBX >0
1.6V < VIN < 40V, FBX <0
0.02
0.02
0.05
0.05
%/V
%/V
VC Source Current
FBX = 0V, VC = 1.3V
–13
μA
VC Sink Current
FBX = 1.7V, VC = 1.3V
FBX = –0.85V, VC = 1.3V
13
10
μA
μA
Oscillator
Switching Frequency
RT = 27.4k to SGND, VFBX = 1.6V
RT = 86.6k to SGND, VFBX = 1.6V
RT = 6.81k to SGND, VFBX = 1.6V
l
250
300
100
1000
340
kHz
kHz
kHz
RT Voltage
FBX = 1.6V, –0.8V
1.13
V
SW Minimum Off-Time
150
200
ns
SW Minimum On-Time
150
200
ns
The
l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C, VIN = 12V, EN/UVLO = 12V, INTVCC = 4.75V, unless otherwise noted.



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