LT3471 데이터 시트보기 (PDF) - Linear Technology
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LT3471 Datasheet PDF : 16 Pages
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LT3471
ABSOLUTE MAXIMUM RATINGS
(Note 1)
VIN Voltage................................................................16V
SW1, SW2 Voltage..................................... –0.4V to 42V
FB1N, FB1P, FB2N, FB2P Voltage......... 12V or VIN – 1.5V
SHDN/SS1, SHDN/SS2 Voltage ............................... 16V
VREF Voltage.............................................................1.5V
Maximum Junction Temperature ........................ 125°C
Operating Temperature Range (Note 2) ...– 40°C to 85°C
Storage Temperature Range...................– 65°C to 125°C
PIN CONFIGURATION
TOP VIEW
FB1N 1
FB1P 2
VREF 3
FB2P 4
FB2N 5
10 SW1
9 SHDN/SS1
11
8 VIN
7 SHDN/SS2
6 SW2
DD PACKAGE
10-LEAD (3mm × 3mm) PLASTIC DFN
TJMAX = 125°C, θJA = 43°C/ W, θJC = 3°C/W
EXPOSED PAD (PIN 11) IS GND MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LT3471EDD#PBF
LT3471EDD#TRPBF
LBHM
10-Lead (3mm × 3mm) Plastic DFN
LEAD BASED FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LT3471EDD
LT3471EDD#TR
LBHM
10-Lead (3mm × 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/
This product is only offered in trays. For more information go to: http://www.linear.com/packaging/
TEMPERATURE RANGE
–40°C to 85°C
TEMPERATURE RANGE
–40°C to 85°C
ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the full operating
temperature range, otherwise specifications are TA = 25°C. VIN = VSHDN = 3V unless otherwise noted.
PARAMETER
CONDITIONS
MIN TYP MAX
Minimum Operating Voltage
2.1
2.4
Reference Voltage
0.991 1.000 1.009
l 0.987
1.013
Reference Voltage Current Limit
(Note 3)
1
1.4
Reference Voltage Load Regulation
Reference Voltage Line Regulation
0mA ≤ IREF ≤ 100μA (Note 3)
2.6V ≤ VIN ≤ 16V
0.1
0.2
0.03 0.08
Error Amplifier Offset
FB Pin Bias Current
Quiescent Current
Transition from Not Switching to Switching, VFBP = VFBN = 1V
VFB = 1V (Note 3)
l
VSHDN = 1.8V, Not Switching
±2
±3
60
100
2.5
4
Quiescent Current in Shutdown
Switching Frequency
VSHDN = 0.3V, VIN = 3V
0.01
1
1
1.2
1.4
Maximum Duty Cycle
90
94
l 86
Minimum Duty Cycle
15
Switch Current Limit
At Minimum Duty Cycle
At Maximum Duty Cycle (Note 4)
1.5
2.05
2.6
0.9 1.45 2.0
Switch VCESAT
Switch Leakage Current
SHDN/SS Input Voltage High
ISW = 0.5A (Note 5)
VSW = 5V
150
250
0.01
1
1.8
2
UNITS
V
V
V
mA
%/100μA
%/V
mV
nA
mA
μA
MHz
%
%
%
A
A
mV
μA
V
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