LT1737IS Просмотр технического описания (PDF) - Linear Technology
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LT1737IS Datasheet PDF : 28 Pages
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LT1737
ABSOLUTE AXI U RATI GS
(Note 1)
VCC Supply Voltage ................................................. 22V
UVLO Pin Voltage .................................................... VCC
ISENSE Pin Voltage .................................................... 2V
FB Pin Current ..................................................... ±2mA
Operating Junction
Temperature Range
LT1737C ............................................... 0°C to 100°C
LT1737I ............................................ –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
PGND 1
ISENSE 2
SFST 3
ROCMP 4
RCMPC 5
OSCAP 6
VC 7
FB 8
16 GATE
15 VCC
14 tON
13 ENDLY
12 MINENAB
11 SGND
10 UVLO
9 3VOUT
GN PACKAGE
S PACKAGE
16-LEAD PLASTIC SSOP 16-LEAD PLASTIC SO
TJMAX = 125°C, θJA = 110°C/W (GN)
TJMAX = 125°C, θJA = 110°C/W (SO)
ORDER PART
NUMBER
LT1737CGN
LT1737CS
LT1737IGN
LT1737IS
GN PART MARKING
1737
1737I
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 TA = 25°C. VCC = 14V, GATE open, VC = 1.4V unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
Power Supply
VCC(MIN)
ICC
Minimum Input Voltage
Supply Current
Shutdown Current
Feedback Amplifier
VC = Open
VUVLO = 0V, VC = Open
q
4.1
4.5
q
10
15
q
50
150
VFB
Feedback Voltage
1.230
q 1.220
1.245
1.260
1.270
IFB
Feedback Pin Input Current
gm
Feedback Amplifier Transconductance
∆lC = ±10µA
q 400
500
1000
1800
ISRC, ISNK
VCL
Feedback Amplifier Source or Sink Current
Feedback Amplifier Clamp Voltage
Reference Voltage/Current Line Regulation
Voltage Gain
Soft-Start Charging Current
Soft-Start Discharge Current
Gate Output
4.75V ≤ VIN ≤ 18V
VC = 1V to 2V
VSFST = 0V
VSFST = 1.5V, VUVLO = 0V
q 30
q
25
0.8
50
80
2.5
0.01
0.05
2000
40
50
1.5
VGATE
IGATE
tr
tf
Output High Level
Output Low Level
Output Sink Current in Shutdown, VUVLO = 0V
Rise Time
Fall Time
IGATE = 100mA
IGATE = 500mA
IGATE = 100mA
IGATE = 500mA
VGATE = 2V
CL = 1000pF
CL = 1000pF
q 11.5
12.1
q 11.0
11.8
q
0.3
0.45
q
0.6
1.0
q 1.2
2.5
30
30
UNITS
V
mA
µA
V
V
nA
µmho
µA
V
%/V
V/V
µA
mA
V
V
V
V
mA
ns
ns
1737f
2
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