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参数资料
| 型号： | LTC3418EUHF#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 15/20页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 8A 38QFN |
| 标准包装： | 52 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.8 V ~ 5 V |
| 输入电压： | 2.25 V ~ 5.5 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 1MHz |
| 电流 - 输出： | 8A |
| 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： | 38-WFQFN 裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 38-QFN（5x7） |
| 产品目录页面： | 1334 (CN2011-ZH PDF) |
LTC3418
APPLICATIONS INFORMATION
1 + =
IfwesetthesumofR2andR3to200k,thenthefollowing
equations can be solved.
R 2 + R 3 = 200 k
R2 0 . 8 V
R 3 0 . 67 V
The two equations shown above result in the following
values for R2 and R3: R2 = 33.2k, R3 = 169k. The value
of R1 can now be determined by solving the equation:
1. A ground plane is recommended. If a ground plane layer
is not used, the signal and power grounds should be
segregated with all small-signal components returning
to the SGND pin at one point which is then connected
to the PGND pin close to the LTC3418.
2. Connect the (+) terminals of the input capacitor(s), C IN ,
as close as possible to the PV IN and PGND pins at all
four corners of the package. These capacitors provide
the AC current into the internal power MOSFETs.
1 +
R 1
202 . 2 k
=
2. 5 V
0 . 8 V
3. Keep the switching node, SW, away from all sensitive
small-signal nodes.
R 1 = 430 k
A value of 432k will be selected for R1. Figure 4 shows the
complete schematic for this design example.
PC Board Layout Checklist
When laying out the printed circuit board, the following
checklist should be used to ensure proper operation of
the LTC3418. Check the following in your layout.
Top Layer
4. Flood all unused areas on all layers with copper. Flooding
with copper will reduce the temperature rise of power
components. You can connect the copper areas to any
DC net (PV IN , SV IN , V OUT , PGND, SGND or any other
DC rail in your system).
5. Connect the V FB pin directly to the feedback resistors.
The resistor divider must be connected between V OUT
and SGND.
6. To minimize switching noise coupling to SV IN , place
an optional local ?lter between SV IN and PV IN . Most
designs do not require this ?lter.
Bottom Layer
Figure 5. LTC3418 Layout Diagram
3418fb
15
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3419 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Monolithic 600mA Synchronous Step-Down Regulator |
| LTC3419EDD | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Monolithic 600mA Synchronous Step-Down Regulator |
| LTC3419EDD#PBF | 功能描述:IC REG BUCK SYNC ADJ .6A DL 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: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 |
| LTC3419EDD#TRPBF | 功能描述:IC REG BUCK SYNC ADJ .6A DL 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:升压（升压） 输出类型:可调式 输出数:1 输出电压:1.24 V ~ 30 V 输入电压:1.5 V ~ 12 V PWM 型:电流模式，混合 频率 - 开关:600kHz 电流 - 输出:500mA 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) 供应商设备封装:8-SOIC |
| LTC3419EDD-1 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Monolithic 600mA Synchronous Step-Down Regulator |
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