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| 型号： | SP6650EU-L/TR |
| 厂商： | Exar Corporation |
| 文件页数： | 14/17页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC 3.3V/ADJ 10MSOP |
| 标准包装： | 2,500 |
| 类型： | 降压（降压） |
| 输出类型： | 两者兼有 |
| 输出数： | 1 |
| 输出电压： | 3.3V，1.25 V ~ 5 V |
| 输入电压： | 2.7 V ~ 6.5 V |
| 电流 - 输出： | 600mA |
| 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： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 10-MSOP |
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H i g h E f f i c i e n c y 6 0 0 m A S y n c h r o n o u s B u c k R e g u l a t o r
Fig.22: Additional Application Circuit: V IN = 5.0V, V OUT = 12V, and Max I LOAD = 150mA.
Fig. 23: Additional Application Circuit: V IN = 5.0V, V OUT = 5.0V, I LOAD = 250mA.
L AYOUT C ONSIDERATIONS
Proper layout is a very important part of the
onboard power supply, affecting normal
functionality of the DC-DC converter itself and
EMI. Because of the high frequency switching
of the converter, the traces that couple an
electric field can conduct currents under the
AC voltages across the parasitic capacitance.
Magnetic field coupling traces can induce
currents like transformers.
To avoid an excessive interference between
the converter and the other active components
on the board, some rules should be followed.
Avoid injecting noise into the sensitive part of
the circuit via the GND Plane. Input and
output capacitors conduct the current through
the GND Plane and high frequency
components of the current can degrade the
sensitive circuitry. Separate the power and
signal grounds and connect them at one point
to minimize the noise injected from the power
ground to the signal ground. "Star" connection
of the ground traces is shown on Figure 24,
where GND is the minus pole of the output
capacitor.
Power loops on the input and output of the
converter should be laid out with the shortest
and widest traces possible. The longer and
? 2012 Exar Corporation
14/17
Rev. 2.0.0
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