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参数资料
| 型号： | LT3663HMS8E#TRPBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 2.5 A SWITCHING REGULATOR, 1650 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | LEAD FREE, PLASTIC, MSOP-8 |
| 文件页数： | 3/16页 |
| 文件大小： | 188K |
| 代理商： | LT3663HMS8E#TRPBF |
LT3663
11
3663fb
APPLICATIONS INFORMATION
PCB Layout
Proper operation and minimum EMI, requires careful
printed circuit board layout. Figure 5 shows the recom-
mended component placement with trace, ground plane
and via locations. Note that large, switched currents ow
in the LT3663’s VIN and SW pins, the catch diode (D2)
and the input capacitor (C1). Keep the loop formed by
these components as small as possible and tied to system
ground in only one place. Locate these components, along
with the inductor and output capacitor, on the same side
of the circuit board, and keep their connections on that
layer. Place a local, unbroken ground plane below these
components, and tie this ground plane to system ground
at one location, ideally at the ground terminal of the output
capacitor C1. Make the SW and BOOST PCB trace as short
as possible. Include vias near the exposed GND pad of
the LT3663 to help remove heat from the LT3663 to the
ground plane.
High Temperature Considerations
The die temperature of the LT3663 must not exceed the
maximum rating. This is generally not a concern unless
the ambient temperature is above 85°C. For higher tem-
peratures, take care in the layout of the circuit to ensure
good heat sinking of the LT3663. De-rate the maximum
load current as the ambient temperature approaches the
maximum temperature rating. Calculate the die tempera-
ture by multiplying the LT3663 power dissipation by the
thermal resistance from junction to ambient. Estimate
the power dissipation within the LT3663 by calculating
the total power loss from an efciency measurement
and subtracting the catch diode loss. Thermal resistance
depends on the layout of the circuit board, but 64°C/W is
typical for the (2mm × 3mm) DFN (DCB) package.
Other Linear Technology Publications
Application Notes 19, 35 and 44 contain more detailed
descriptions and design information for Buck regulators
and other switching regulators. The LT1376 data sheet
has a more extensive discussion of output ripple, loop
compensation and stability testing. Design Note 100
shows how to generate a bipolar output supply using a
Buck regulator.
3663 F05
VIN
RUN
RILIM
C2
VOUT
GND
L
D1
C3
C1
R2
R1
3
4
2
1
6
5
7
8
LT3663
Figure 5. LT3663 PCB Layout
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3663IDCB#TRMPBF | 功能描述:IC REG BUCK ADJ 1.2A 8DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
| LT3663IDCB#TRPBF | 功能描述:IC REG BUCK ADJ 1.2A 8DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
| LT3663IDCB-5#TRMPBF | 制造商:Linear Technology 功能描述: |
| LT3663IDCB-5#TRPBF | 制造商:Linear Technology 功能描述:Conv DC-DC Single Step Down 7.5V to 36V 8-Pin DFN EP T/R |
| LT3663IMS8E#PBF | 功能描述:IC REG BUCK ADJ 1.2A 8MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:250 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V 输入电压:2.05 V ~ 6 V PWM 型:电压模式 频率 - 开关:2MHz 电流 - 输出:500mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:6-UFDFN 包装:带卷 (TR) 供应商设备封装:6-SON（1.45x1） 产品目录页面:1032 (CN2011-ZH PDF) 其它名称:296-25628-2 |
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