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参数资料
| 型号： | LM3351MDC |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHED CAPACITOR CONVERTER, 275 kHz SWITCHING FREQ-MAX, UUC |
| 封装： | DIE |
| 文件页数： | 8/11页 |
| 文件大小： | 316K |
| 代理商： | LM3351MDC |
Typical Application Circuits
Layout Information
LAYOUT CONSIDERATIONS
The LM3351’s high switching frequency (200 kHz) makes a good layout important.
Figure 3 illustrates a typical layout. It is im-
portant to keep the distance short between the four capacitors and the IC. Wide traces and grounding are also recommended.
These steps will minimize trace inductance and high frequency ringing. Of the four capacitors, C
IN and COUT have the highest
value of di/dt. It is therefore most important to keep them close to the IC. The ground lead that C
IN and COUT share should also
be kept wide and short.
The location of the diode (D1) used in the step-up configuration is not critical. This diode is only used during the initial turn on of
the IC. D1 is not needed in step-down applications.
DS100146-12
FIGURE 1. Step-Up Converter
DS100146-13
FIGURE 2. Step-Down Converter
LM3351
www.national.com
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相关代理商/技术参数 |
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| LM3351MMX | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Switched Capacitor Voltage Converter |
| LM3351MMX/NOPB | 功能描述:IC REG MULTI CONFIG 50MA 8-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- 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:4.5 V ~ 24 V PWM 型:- 频率 - 开关:- 电流 - 输出:125mA 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 包装:Digi-Reel® 供应商设备封装:SOT-6 其它名称:MAX1836EUT33#TG16DKR |
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