参数资料
| 型号： | SC283WLTRT |
| 厂商： | Semtech |
| 文件页数： | 18/20页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 1.8A 18MLPQ |
| 标准包装： | 1 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 2 |
| 输出电压： | 0.8 V ~ 3.3 V |
| 输入电压： | 2.9 V ~ 5.5 V |
| 频率 - 开关： | 2.5MHz |
| 电流 - 输出： | 1.8A |
| 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： | 18-WFQFN 裸露焊盘 |
| 包装： | 标准包装 |
| 供应商设备封装： | 18-MLPQ-W（2x3） |
| 其它名称： | SC283WLDKR |
SC283
Applications Information (continued)
PCB Layout Considerations
The layout diagram in Figure 7 shows a recommended
top-layer PCB for the SC283 and supporting components.
L B
Figure 8 shows the bottom layer for this PCB. Fundamental
layout rules must be followed since the layout is critical
for achieving the performance specified in the Electrical
Characteristics table. Poor layout can degrade the
performance of the DC-DC converter and can contribute
CTLxA
C INB
VIN VOUTB
to EMI problems, ground bounce, and resistive voltage
losses. Poor regulation and instability can result.
The following guidelines are recommended when
GND
U1
GND
CTLxB
developing a PCB layout:
1. The input capacitor, C IN , should be placed as close to the
VIN and GND pins as possible. This capacitor provides
a low impedance loop for the pulsed currents present
at the buck converter ’s input. Use short wide traces
to connect as closely to the IC as possible. This will
GND
VOUTA
L A
C INA
GND
VIN
minimize EMI and input voltage ripple by localizing
the high frequency current pulses.
2. Keep the LX pin traces as short as possible to minimize
pickup of high frequency switching edges to other
parts of the circuit. C OUT and L should be connected as
close as possible between the LX and GND pins, with
a direct return to the GND pin from C OUT .
3. Route the output voltage feedback/sense path away
from the inductor and LX node to minimize noise and
magnetic interference.
4. Use a ground plane referenced to the SC283 GND pin.
Use several vias to connect to the component side
ground to further reduce noise and interference on
sensitive circuit nodes.
5. If possible, minimize the resistance from the output
Figure 7 — Recommended PCB Layout (Top Layer)
VIN
GND
and GND pin to the load. This will reduce the voltage
drop on the ground plane and improve the load
regulation. It will also improve the overall efficiency
by reducing the copper losses on the output and
ground planes.
Figure 8 — Bottom Layer Detail
? 2010 Semtech Corp.
18
www.semtech.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SC284 | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Dual Channel 2.5MHz, 1.8A Synchronous Step-Down Regulator |
| SC284ULTRT | 制造商:Semtech Corporation 功能描述:Conv DC-DC Dual Step Down 2.9V to 5.5V 20-Pin MLPQ EP T/R |
| SC28-6 | 制造商:Thomas & Betts 功能描述:IDENTIFICATION TAGS |
| SC286ULTRT | 功能描述:IC REG BUCK SYNC ADJ 4A 28MLPQ 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:1,000 系列:- 类型:降压（降压） 输出类型:可调式 输出数:1 输出电压:0.6 V ~ 4.5 V 输入电压:3 V ~ 5.5 V PWM 型:电流模式 频率 - 开关:3MHz 电流 - 输出:1.5A 同步整流器:无 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:6-WDFN 裸露焊盘 包装:带卷 (TR) 供应商设备封装:6-LLP-EP（3x3） 产品目录页面:1300 (CN2011-ZH PDF) 其它名称:LM2831ZSDLM2831ZSDTR |
| SC28829PK04 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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