参数资料
| 型号： | NCV890201MWTXG |
| 厂商： | ON Semiconductor |
| 文件页数： | 14/15页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 2A 10-DFN |
| 标准包装： | 1 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 可调至 0.8V |
| 输入电压： | 4.5 V ~ 36 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 2MHz |
| 电流 - 输出： | 2A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 105°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-VFDFN 裸露焊盘 |
| 包装： | 标准包装 |
| 供应商设备封装： | 10-DFN（3x3） |
| 其它名称： | NCV890201MWTXGOSDKR |
NCV890201
I DRMS +
(1 * D) I OUT 2 )
D I L
12
2
(eq. 6)
For example, using a 4.7 m H input capacitor, it is easy to
calculate that an inductor of 200 nH will ensure that the
input filter has a cut ? off frequency below 200 kHz (low
D I L D
I INac +
? R D the dynamic resistance of the diode (extracted from
the V/I curve of the diode in its datasheet).
Then, knowing the thermal resistance of the package and
the amount of heatsinking on the PCB, the temperature rise
corresponding to this power dissipation can be estimated.
Input capacitor:
The input capacitor must sustain the RMS input ripple
current I INac :
(eq. 7)
2 3
It can be designed in combination with an inductor to build
an input filter to filter out the ripple current in the source, in
order to reduce EMI conducted emissions.
ORDERING INFORMATION
enough to attenuate the 2 MHz ripple).
PCB LAYOUT RECOMMENDATION
As with any switching power supplies, there are some
guidelines to follow to optimize the layout of the printed
circuit board for the NCV890201. However, because of the
high switching frequency extra care has to be taken.
? Minimize the area of the power current loops:
? Input capacitor 3 NCV890201 switch 3 Inductor
3 output capacitor 3 return through Ground
? Freewheeling diode 3 inductor 3 Output capacitor
3 return through ground
? Minimize the length of high impedance signals, and
route them far away from the power loops:
? Feedback trace
? Comp trace
Device
NCV890201MWTXG
Package
DFN10 with wettable flanks
(Pb ? Free)
Shipping ?
3000 / Tape & Reel
?For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
http://onsemi.com
14
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相关代理商/技术参数 |
参数描述 |
|---|---|
| NCV890230PDR2G | 功能描述:直流/直流开关转换器 2 MHZ SWITCHER RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| NCV890231MWTXG | 功能描述:直流/直流开关转换器 2 MHZ SWITCHER Regulator 2 A 2 MHz RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| NCV8925SNT1G | 制造商:ON Semiconductor 功能描述: |
| NCV896530 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:2.1 MHz Low Voltage Dual Output Buck Converter |
| NCV898031 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:2 MHz Non-Synchronous SEPIC/Boost Controller |
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