参数资料
型号: LT3740EDHC#TRPBF
厂商: Linear Technology
文件页数: 16/20页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM CM 16-DFN
标准包装: 2,500
PWM 型: 电流模式
输出数: 1
频率 - 最大: 330kHz
占空比: 90%
电源电压: 2.2 V ~ 22 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 85°C
封装/外壳: 16-WFDFN 裸露焊盘
包装: 带卷 (TR)
LT3740
APPLICATIONS INFORMATION
PC Board Layout Considerations
As with all switching regulators, careful attention must be
paid to the PCB board layout and component placement.
Minimize the parasitic inductance in the loop of
C IN , MOSFETs and D1 which carries large switching
current.
Place the power components close together with
short and wide interconnecting trances. The power
components consist of the top and bottom MOSFETs,
the inductor, C IN and C OUT . One way to approach this
is to simply place them on the board ?rst.
Similar attention should be paid to the power components
that make up the boost converter. They should also be
placed close together with short and wide traces.
Always use a ground plane under the switching regulator
Use compact plane for switch node (SW) to improve
cooling of the MOSFETs and to keep EMI low.
Use planes for V IN and V OUT to maintain good voltage
?ltering and to keep power losses low. Unused areas
can be ?lled with copper and connect to any DC node
(V IN , V OUT , GND)
Place C B close to BIAS pin and input capacitor.
Keep the high dv/dt nodes (SW, TG, BG, SWB) away
from sensitive small signal nodes.
to minimize interplane coupling.
3740fc
16
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