LT1941 Ver la hoja de datos (PDF) - Linear Technology
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LT1941 Datasheet PDF : 24 Pages
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LT1941
ABSOLUTE MAXIMUM RATINGS
(Note 1)
VIN Pin ........................................................(–0.3V), 25V
BOOST Pin Voltage ...................................................35V
BOOST Above SW Pin...............................................25V
BIAS1, BIAS2 Pins ....................................................25V
PGOOD, 5GOOD, 12GOOD Pins.................................25V
RUN/SS, VC, FB, NFB Pins ..........................................3V
SW1, SW2 Voltage.....................................................VIN
SW3 Voltage .............................................................40V
Maximum Junction Temperature (Note 6) ............ 125°C
Operating Ambient Temperature Range
(Note 2)....................................................–40°C to 85°C
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)................... 300°C
PIN CONFIGURATION
TOP VIEW
VIN 1
VIN 2
SW1 3
28 BIAS2
27 SW3
26 PGND
SW1 4
25 VIN
BOOST1 5
24 BOOST2
PGOOD1 6
23 SW2
VC1 7
FB1 8
22 VIN
29
21 PGOOD3
PGOOD2 9
20 FB3
VC2 10
FB2 11
19 NFB
18 VC3
RUN/SS1 12
17 5GOOD
RUN/SS2 13
16 12GOOD
RUN/SS3 14
15 BIAS1
FE PACKAGE
28-LEAD PLASTIC TSSOP
TJMAX = 125°C, θJA = 25°C/W
EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LT1941EFE#PBF
LT1941EFE#TRPBF
LT1941EFE
28-LEAD PLASTIC TSSOP
LEAD BASED FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LT1941EFE
LT1941EFE#TR
LT1941EFE
28-LEAD PLASTIC TSSOP
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
TEMPERATURE RANGE
–40°C to 85°C
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at TA = 25°C. VIN, VBIAS1, VBIAS2 = 5V, VBOOST1, VBOOST2 = 8V, unless otherwise noted. (Note 2)
PARAMETER
CONDITIONS
MIN
TYP
MAX UNITS
Minimum Operating Voltage
l
3.3
3.5
V
VIN Quiescent Current
BIAS1 Quiescent Current
Not Switching
Not Switching
2
3.5
mA
5
7.5
mA
BIAS2 Quiescent Current
Not Switching
1.6
2.2
mA
Shutdown Current
Reference Voltage Line Regulation
VC Source Current
VC Sink Current
VC Clamp Voltage
Switching Frequency
VRUNSS1,2,3 = 0V
5V < VIN < 25V
VC = 0.6V
VC = 0.6V
50
75
μA
0.01
%/V
100
μA
100
μA
1.7
V
l 0.9
1.1
1.35
MHz
1941fb
2
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