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參數資料
| 型號： | LT3845EFE#TR |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, 600 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | 4.40 MM, PLASTIC, TSSOP-16 |
| 文件頁數： | 12/24頁 |
| 文件大?。?/td> | 263K |
| 代理商： | LT3845EFE#TR |
LT3845
2
3845fb
PACKAGE/ORDER INFORMATION
ELECTRICAL CHARACTERISTICS
ABSOLUTE MAXIMUM RATINGS
(Note 1)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VIN Operating Voltage Range (Note 4)
VIN Minimum Start Voltage
VIN UVLO Threshold (Falling)
VIN UVLO Threshold Hysteresis
●
4
3.6
3.8
670
60
7.5
4
V
mV
VIN Supply Current
VIN Burst Mode Current
VIN Shutdown Current
VCC > 9V
VBURST_EN = 0V, VFB = 1.35V
VSHDN = 0V
●
20
915
μA
BOOST Operating Voltage Range
BOOST Operating Voltage Range (Note 5)
BOOST UVLO Threshold (Rising)
BOOST UVLO Threshold Hysteresis
VBOOST – VSW
●
5
400
75
20
V
mV
BOOST Supply Current (Note 6)
BOOST Burst Mode Current
BOOST Shutdown Current
VBURST_EN = 0V
VSHDN = 0V
1.4
0.1
mA
μA
VCC Operating Voltage Range (Note 5)
VCC Output Voltage
VCC UVLO Threshold (Rising)
VCC UVLO Threshold Hysteresis
Over Full Line and Load Range
●
8
6.25
500
20
8.3
V
mV
VCC Supply Current (Note 6)
VCC Burst Mode Current
VCC Shutdown Current
VCC Current Limit
VBURST_EN = 0V
VSHDN = 0V
●
–40
3
100
20
–150
3.7
mA
μA
mA
FE PACKAGE
16-LEAD PLASTIC TSSOP
1
2
3
4
5
6
7
8
TOP VIEW
16
15
14
13
12
11
10
9
VIN
SHDN
CSS
BURST_EN
VFB
VC
SYNC
fSET
BOOST
TG
SW
VCC
BG
PGND
SENSE+
SENSE–
17
TJMAX = 125°C, θJA = 40°C/W, θJC = 10°C/W
EXPOSED PAD (PIN 17) IS SGND, MUST BE SOLDERED TO PCB
ORDER PART NUMBER
FE PART MARKING*
LT3845EFE
LT3845IFE
3845FE
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
Consult LTC Marketing for parts specied with wider operating temperature ranges.
*The temperature grade is identied by a label on the shipping container.
Input Supply Voltage (VIN)........................................65V
Boosted Supply Voltage (BOOST) .............................80V
Switch Voltage (SW) (Note 8) ....................... 65V to –2V
Differential Boost Voltage
(BOOST to SW).....................................................24V
Bias Supply Voltage (VCC).........................................24V
SENSE+ and SENSE– Voltages ..................................40V
Differential Sense Voltage
(SENSE+ to SENSE–)................................... 1V to –1V
BURST_EN Voltage ...................................................24V
SYNC, VC, VFB, CSS, and SHDN Voltages ....................5V
SHDN Pin Currents ..................................................1mA
Operating Junction Temperature Range (Note 2)
LT3845E (Note 3)............................... –40°C to 125°C
LT3845I ............................................. –40°C to 125°C
Storage Temperature.............................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
The
l denotes the specications which apply over the full operating
temperature range, otherwise specications 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.
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