参数资料
型号: LT1506IS8-3.3
厂商: Linear Technology
文件页数: 15/24页
文件大小: 0K
描述: IC REG BUCK 3.3V 4.5A 8SOIC
标准包装: 100
类型: 降压(降压)
输出类型: 固定
输出数: 1
输出电压: 3.3V
输入电压: 4 V ~ 15 V
PWM 型: 电流模式
频率 - 开关: 500kHz
电流 - 输出: 4.5A
同步整流器:
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
包装: 管件
供应商设备封装: 8-SOIC
LT1506
APPLICATIO N S I N FOR M ATIO N
from the switch node. Also note that the high current
ground path of the catch diode and input capacitor are kept
very short and separate from the analog ground line.
The high speed switching current path is shown schemati-
cally in Figure 6. Minimum lead length in this path is
essential to ensure clean switching and low EMI. The path
the only one containing nanosecond rise and fall times. If
you follow this path on the PC layout, you will see that it is
irreducibly short. If you move the diode or input capacitor
away from the LT1506, get your resumé in order. The
other paths contain only some combination of DC and
500kHz triwave, so are much less critical.
including the switch, catch diode, and input capacitor is
CONNECT TO
MINIMIZE LT1506 C3, D1 LOOP
GROUND PLANE
V IN
C3
D1
C5
GND
C6
V OUT
GND
1
U1
L1
TAKE OUTPUT
DIRECTLY FROM
END OF OUTPUT
CAPACITOR
CONNECT TO
GROUND PLANE
PLACE FEEDTHROUGHS
AROUND GND PIN FOR GOOD
THERMAL CONDUCTIVITY
C1
R3
D2
KEEP FB AND V C COMPONENTS
AWAY FROM HIGH FREQUENCY,
R2
C4
KELVIN SENSE
V OUT
1506 F05
HIGH CURRENT COMPONENTS
Figure 5. Suggested Layout (Topside Only Shown)
SWITCH NODE
L1
5V
HIGH
V IN
FREQUENCY
CIRCULATING
LOAD
PATH
1506 F06
Figure 6. High Speed Switching Path
15
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