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参数资料
| 型号： | LT3663IMS8E-5#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 5/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK 5V 1.2A 8MSOP |
| 标准包装： | 50 |
| 类型： | 降压（降压） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 5V |
| 输入电压： | 7.5 V ~ 36 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 1MHz |
| 电流 - 输出： | 1.2A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽）裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 8-MSOP-EP |
| 产品目录页面： | 1332 (CN2011-ZH PDF) |
LT3663
TYPICAL PERFORMANCE CHARACTERISTICS
T A = 25°C, unless otherwise noted.
400
Switch Voltage Drop
125°C
1.4
Boost Diode V f
35
BOOST Pin Current
350
1.2
30
300
250
25°C
–45°C
1
0.8
25
20
200
150
100
50
0.6
0.4
0.2
15
10
5
0
0
0.2
0.4
0.6
0.8
1
1.2
0
0
50
100
150
200
250
300
0
0
0.2
0.4
0.5
0.8
1.0
1.2
SWITCH CURRENT (A)
3663 G01
DIODE CURRENT (mA)
3653 G09
SWITCH CURRENT (A)
3653 G07
PIN FUNCTIONS
BOOST: The BOOST pin is used to provide a drive voltage,
higher than the input voltage, to the internal power switch.
The BOOST pin is also internally connected to the cathode
of the BOOST diode.
GND (Exposed Pad Pin 9) : Ground. The exposed pad
must be soldered to the PCB and electrically connected
to ground. Use a large ground plane and thermal vias to
optimize thermal performance.
FB (LT3663): The LT3663 regulates the FB pin to 0.8V.
Connect the feedback resistor divider tap to this pin.
I LIM : Output Current Limit Program Pin. Connect a resistor
to ground to program the regulator output current limit.
I SENSE : The I SENSE pin is the positive input to the internal
output current limit sense resistor. The I SENSE pin is also
the anode to the internal BOOST diode.
RUN: The Run pin is used to put the LT3663 into shutdown
mode. Tie to ground to shut down the LT3663. Tie to 2.5V
or more for normal operation. If the shutdown feature is
not used, connect this pin to V IN .
SW: The SW pin is the output of the internal power switch.
Connect this pin to the inductor, catch diode and boost
capacitor.
V IN : The V IN pin supplies current to the LT3663’s internal
regulator and internal power switch. Capacitively bypass
the pin to ground.
V OUT : The V OUT pin is connected to the negative terminal
of the internal output current limit sense resistor.
V OUTS (LT3663-X): Output Voltage Sense Pin. Connect to
the positive terminal of the output capacitor.
5
For more information For more information www.linear.com/LT3663
3663fc
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