LT3844 데이터 시트보기 (PDF) - Linear Technology
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LT3844 Datasheet PDF : 24 Pages
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LT3844
ABSOLUTE AXI U RATI GS PI CO FIGURATIO
(Note 1)
Input Supply Voltage (VIN)......................... 65V to –0.3V
Boosted Supply Voltage (BOOST) .............. 80V to –0.3V
Switch Voltage (SW) (Note 8) ...................... 65V to –1V
Differential Boost Voltage
(BOOST to SW) ..................................... 24V to –0.3V
Bias Supply Voltage (VCC) ......................... 24V to –0.3V
SENSE+ and SENSE– Voltages ................... 40V to –0.3V
Differential Sense Voltage
(SENSE+ to SENSE–) .................................. 1V to –1V
BURST_EN Voltage .................................... 24V to –0.3V
SYNC, VC, VFB, CSS, and SHDN Voltages ..... 5V to –0.3V
SHDN Pin Currents ................................................. 1mA
Operating Junction Temperature Range (Note 2)
TOP VIEW
VIN 1
SHDN 2
CSS 3
BURST_EN 4
VFB 5
VC 6
SYNC 7
fSET 8
16 BOOST
15 TG
14 SW
17
13 VCC
12 PGND
11 SENSE+
10 SENSE–
9 SGND
FE PACKAGE
16-LEAD PLASTIC TSSOP
TJMAX = 125°C, θJA = 40°C/W, θJC = 10°C/W
EXPOSED PAD IS SGND (PIN 17)
MUST BE SOLDERED TO PCB
LT3844E (Note 3) ..............................–40°C to 125°C
LT3844I .............................................–40°C to 125°C
Storage Temperature .............................–65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
UW U
ORDER I FOR ATIO
LEAD FREE FINISH
LT3844EFE#PBF
LT3844IFE#PBF
TAPE AND REEL
LT3844EFE#TRPBF
LT3844IFE#TRPBF
PART MARKING
3844EFE
3844IFE
PACKAGE DESCRIPTION
16-Lead Plastic TSSOP
16-Lead Plastic TSSOP
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on nonstandard lead based finish parts.
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 125°C
–40°C to 125°C
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 20V, VCC = BOOST = BURST_EN = 10V, SHDN = 2V, RSET = 49.9kΩ,
SENSE– = SENSE+ = 10V, SGND = PGND = SW = SYNC = 0V, unless otherwise noted.
PARAMETER
VIN Operating Voltage Range (Note 4)
VIN Minimum Start Voltage
VIN UVLO Threshold (Falling)
VIN UVLO Threshold Hysteresis
VIN Supply Current
VIN Burst Mode Current
VIN Shutdown Current
BOOST Operating Voltage Range
BOOST Operating Voltage Range (Note 5)
BOOST UVLO Threshold (Rising)
BOOST UVLO Threshold Hysteresis
BOOST Supply Current (Note 6)
BOOST Burst Mode Current
BOOST Shutdown Current
CONDITIONS
VCC > 9V
VBURST_EN = 0V, VFB = 1.35V
VSHDN = 0V
VBOOST - VSW
VBOOST - VSW
VBOOST - VSW
VBURST_EN = 0V
VSHDN = 0V
MIN TYP MAX UNITS
●4
60
V
●
7.5
V
● 3.6
3.8
4
V
670
mV
20
μA
20
μA
●
10
15
μA
●
75
V
●
20
V
5
V
400
mV
1.4
mA
0.1
μA
0.1
μA
3844fa
2
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