LT3493 Просмотр технического описания (PDF) - Linear Technology
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LT3493 Datasheet PDF : 20 Pages
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LT3493
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Input Voltage (VIN)....................................................40V
BOOST Pin Voltage ..................................................50V
BOOST Pin Above SW Pin.........................................25V
SHDN Pin..................................................................40V
FB Voltage...................................................................6V
Operating Temperature Range (Note 2)
LT3493E .............................................. –40°C to 85°C
LT3493I ............................................. –40°C to 125°C
Maximum Junction Temperature .......................... 125°C
Storage Temperature Range................... –65°C to 150°C
PIN CONFIGURATION
FB 1
GND 2
BOOST 3
TOP VIEW
7
6 SHDN
5 VIN
4 SW
DCB PACKAGE
6-LEAD (2mm s 3mm) PLASTIC DFN
TJMAX = 125°C, θJA = 64°C/W
EXPOSED PAD (PIN 7) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LT3493EDCB#PBF
LT3493EDCB#TRPBF
LCGG
6-Lead (2mm × 3mm) Plastic DFN
LT3493IDCB#PBF
LT3493IDCB#TRPBF
LCGH
6-Lead (2mm × 3mm) Plastic DFN
LEAD BASED FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LT3493EDCB
LT3493EDCB#TR
LCGG
6-Lead (2mm × 3mm) Plastic DFN
LT3493IDCB
LT3493IDCB#TR
LCGH
6-Lead (2mm × 3mm) Plastic DFN
Consult LTC Marketing for parts specified with wider operating temperature ranges.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 125°C
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 125°C
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, VBOOST = 17V, unless otherwise noted. (Note 2)
PARAMETER
CONDITIONS
MIN TYP MAX
VIN Operating Range
Undervoltage Lockout
3.6
36
3.1
3.4
3.6
Feedback Voltage
l 765 780
795
FB Pin Bias Current
Quiescent Current
VFB = Measured VREF + 10mV (Note 4)
Not Switching
l
50
150
1.9
2.5
Quiescent Current in Shutdown
VSHDN = 0V
0.01
2
Reference Line Regulation
Switching Frequency
Maximum Duty Cycle
VIN = 5V to 36V
VFB = 0.7V
VFB = 0V
TA = 25°C
0.007
685 750
815
36
l 88
95
91
95
UNITS
V
V
mV
nA
mA
μA
%/V
kHz
kHz
%
%
3493fb
2
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