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| 型号： | LT3844IFE#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 2/24页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BST INV PWM 16TSSOP |
| 标准包装： | 2,500 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 330kHz |
| 占空比： | 95% |
| 电源电压： | 4 V ~ 60 V |
| 降压： | 是 |
| 升压： | 是 |
| 回扫： | 无 |
| 反相： | 是 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 包装： | 带卷 (TR) |
LT3844
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Input Supply Voltage (V IN ) ......................... 65V to –0.3V
PIN CONFIGURATION
TOP VIEW
Boosted Supply Voltage (BOOST) .............. 80V to –0.3V
Switch Voltage (SW) (Note 8) ....................... 65V to –1V
Differential Boost Voltage
V IN
SHDN
C SS
1
2
3
16 BOOST
15 TG
14 SW
BOOST to SW ........................................ 24V to –0.3V
Bias Supply Voltage (V CC ) .......................... 24V to –0.3V
SENSE + and SENSE – Voltages ................... 40V to –0.3V
Differential Sense Voltage
SENSE + to SENSE – ..................................... 1V to –1V
BURST_EN
V FB
V C
SYNC
f SET
4
5
6
7
8
17
13 V CC
12 PGND
11 SENSE +
10 SENSE –
9 SGND
BURST_EN Voltage .................................... 24V to –0.3V
SYNC, V C , V FB , C SS and SHDN Voltages ...... 5V to –0.3V
SHDN Pin Currents ..................................................1mA
Operating Junction Temperature Range (Note 2)
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
ORDER INFORMATION
FE PACKAGE
16-LEAD PLASTIC TSSOP
T JMAX = 125°C, θ JA = 40°C/W, θ JC = 10°C/W
EXPOSED PAD (PIN 17) IS SGND, MUST BE SOLDERED TO PCB
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
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
Consult LTC Marketing for parts speci?ed with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based ?nish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel speci?cations, go to: http://www.linear.com/tapeandreel/
ELECTRICAL CHARACTERISTICS The l denotes the speci?cations which apply over the full operating
temperature range, otherwise speci?cations are at T A = 25°C. V IN = 20V, V CC = BOOST = BURST_EN = 10V, SHDN = 2V, R SET = 49.9k,
SENSE – = SENSE + = 10V, SGND = PGND = S W = SYNC = 0V, unless otherwise noted.
PARAMETER
V IN Operating Voltage Range (Note 4)
V IN Minimum Start Voltage
V IN UVLO Threshold (Falling)
CONDITIONS
l
l
l
MIN
4
3.6
TYP
3.8
MAX
60
7.5
4
UNITS
V
V
V
V IN UVLO Threshold Hysteresis
670
mV
V IN Supply Current
V IN Burst Mode Current
V CC > 9V
V BURST_EN = 0V, V FB = 1.35V
20
20
μA
μA
V IN 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
V SHDN = 0V
V BOOST – V SW
V BOOST – V SW
V BOOST – V SW
V BURST_EN = 0V
V SHDN = 0V
l
l
10
5
400
1.4
0.1
0.1
15
75
20
μA
V
V
V
mV
mA
μA
μA
3844fb
2
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