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参数资料
| 型号： | LT3681EDE |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 4.4 A SWITCHING REGULATOR, 3100 kHz SWITCHING FREQ-MAX, PDSO14 |
| 封装： | 4 X 3 MM, PLASTIC, DFN-14 |
| 文件页数： | 9/24页 |
| 文件大小： | 367K |
| 代理商： | LT3681EDE |
LT3681
17
3681f
PCB Layout
For proper operation and minimum EMI, care must be taken
during printed circuit board layout. Figure 9 shows the
recommended component placement with trace, ground
plane and via locations. Note that large, switched currents
ow in the LT3681’s VIN and SW pins, the integrated
Schottky diode the input capacitor (CIN) and the output
capacitor (COUT). The loop formed by these components
should be as small as possible. These components,
along with the inductor and output capacitor, should be
placed on the same side of the circuit board, and their
connections should be made on that layer. Place a local,
Figure 9. A Good PCB Layout Ensures Proper, Low EMI Operation
1
2
14
13
3
4
12
11
10
9
8
VIAS TO GND
VIAS TO VOUT
VIAS TO VIN
VIAS TO DC HEATSINK
5
6
7
VIN
CIN
COUT
3681 F11
unbroken ground plane below these components. The SW
and BOOST nodes should be as small as possible. Finally,
keep the FB and VC nodes small so that the ground traces
will shield them from the SW and BOOST nodes. Each of
the Exposed Pads on the bottom of the package must be
soldered to copper pours so that the pad acts as a heat
sink. To keep thermal resistance low, extend the ground
plane as much as possible, and add thermal vias under
and near the LT3681 to additional ground planes within
the circuit board and on the bottom side. Keep in mind
that the thermal design must keep the junctions of the IC
and power diode below the specied absolute maximum
temperature of 125°C.
APPLICATIONS INFORMATION
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3681EDE#PBF | 功能描述:IC REG BUCK ADJ 2A 14DFN 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 |
| LT3681EDE#PBF | 制造商:Linear Technology 功能描述:IC STEP-DOWN REGULATOR DFN-14 |
| LT3681EDE#TRPBF | 功能描述:IC REG BUCK ADJ 2A 14DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 设计资源:Design Support Tool 标准包装:1 系列:- 类型:升压（升压） 输出类型:固定 输出数:1 输出电压:3V 输入电压:0.75 V ~ 2 V PWM 型:- 频率 - 开关:- 电流 - 输出:100mA 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:SOT-23-5 细型，TSOT-23-5 包装:剪切带 (CT) 供应商设备封装:TSOT-23-5 其它名称:AS1323-BTTT-30CT |
| LT3681EDEPBF | 制造商:Linear Technology 功能描述:36V 2.8MHz Step-Down Regulator LT3681 |
| LT3682 | 制造商:LINER 制造商全称:Linear Technology 功能描述:42V, 750mA Step-Down Regulator with 2.5μA |
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