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参数资料
| 型号： | SC417MLTRT |
| 厂商： | Semtech |
| 文件页数： | 30/33页 |
| 文件大小： | 894K |
| 描述： | IC REG DL BUCK/LINEAR 32MLPQ |
| 产品培训模块： | Power Supplies 101 |
| 标准包装： | 1 |
| 系列： | EcoSpeed®, SmartDrive™ |
| 拓扑： | 降压（降压）（1），线性（LDO）（1） |
| 功能： | 任何功能 |
| 输出数： | 2 |
| 频率 - 开关： | 1MHz |
| 电压/电流 - 输出 1： | 可调，10A |
| 电压/电流 - 输出 2： | 5V，200mA |
| 带 LED 驱动器： | 无 |
| 带监控器： | 无 |
| 带序列发生器： | 无 |
| 电源电压： | 3 V ~ 28 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-VFQFN 裸露焊盘 |
| 供应商设备封装： | 32-MLPQ（5x5） |
| 包装： | 标准包装 |
| 产品目录页面： | 1358 (CN2011-ZH PDF) |
| 其它名称： | SC417MLDKR |
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SC417/SC427
30
Applications Information (continued)
to AGND are done by wide copper traces or vias
down to AGND.
Connect PGND to AGND with a short trace or 0&
resistor. This connection should be as close to
the IC as possible.
FB, VOUT, and Other Analog Control Signals
The connection from the V
OUT
power to the
analog control circuitry must be routed from the
output capacitors and located on a quiet layer.
The traces between Vout and the analog control
circuitry (VOUT, and FB pins) must be short and
routed away from noise sources, such as BST, LX,
VIN, and PGND between the input capacitors,
output capacitors, and the IC.
ILIM and TON nodes must be as short as possible
to ensure the best accuracy in current limit and
on time.
R
ILIM
should be close to the IC and connected to
LX with a Kelvin trace to pin 28 on the IC. All of
the LX pins are connected to the LX PAD on the
IC, which should be a sufficient connection and
will prevent the need to connect the resistor
further into the LX plane.
The feedback components for the switcher and
the LDO need to be as close to the FB and FBL
pins of the IC as possible to reduce the possibil-
ity of noise corrupting these analog signals.
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BST, ILIM and LX
LX and BST are very noisy nodes and must be
routed to minimized the PCB area that is exposed
to these signals.
The connections for the boost capacitor
between the IC and LX must be short and directly
connected to the LXBST (pin 13).
The connections for the current limit resistor
between the ILIM pin and LX must be as short as
possible and directly connected to pin 28 (LXS).
The LX node between the IC and the inductor
should be wide enough to handle the inductor
current and short enough to eliminate the pos-
sibility of LX noise corrupting other signals.
Multiple vias should be used to provide a good
connection to LX between the IC and the
inductor.
Capacitors and Current Loops
The current loops between the input capacitors,
the IC, the inductor, and the output capacitors
must be as close as possible to each other to
reduce IR drop across the copper.
All bypass and output capacitors must be con-
nected as close as possible to the pin on the IC.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SC417MT.TRT | 制造商:Semtech Corporation 功能描述: |
| SC418 | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:EcoSpeedTM DC-DC Buck Controller with Programmable LDO |
| SC418455CFUB | 制造商:Freescale Semiconductor 功能描述: |
| SC418458CFUB | 制造商:Freescale Semiconductor 功能描述: |
| SC418464CFUB | 制造商:Freescale Semiconductor 功能描述: 制造商:Motorola Inc 功能描述: |
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