参数资料
型号: NCV890100PDR2G
厂商: ON Semiconductor
文件页数: 14/16页
文件大小: 0K
描述: IC REG BUCK ADJ 1.2A 8-SOICEP
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: 1.2A
同步整流器:
工作温度: -40°C ~ 105°C
安装类型: 表面贴装
封装/外壳: 8-SOIC(0.154",3.90mm Width)裸露焊盘
包装: 标准包装
供应商设备封装: 8-SOIC-EP
其它名称: NCV890100PDR2GOSDKR
NCV890100
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 NCV890100. However, because of the
high switching frequency extra care has to be taken.
? Minimize the area of the power current loops:
? Input capacitor 3 NCV890100 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
NCV890100MWTXG
NCV890100PDR2G
Package
DFN8 with wettable flanks
(Pb ? Free)
SOIC ? 8 EP
(Pb ? Free)
Shipping ?
3000 / Tape & Reel
2500 / 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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