参数资料
型号: NCP3126ADR2G
厂商: ON Semiconductor
文件页数: 15/23页
文件大小: 0K
描述: IC REG BUCK SYNC ADJ 3A 8SOIC
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 ~ 13.2 V
PWM 型: 电压模式
频率 - 开关: 350kHz
电流 - 输出: 3A
同步整流器:
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
包装: 标准包装
供应商设备封装: 8-SOICN
其它名称: NCP3126ADR2GOSDKR
NCP3126
R 2 + R 1 @
V REF
V OUT * V REF
(eq. 39)
The compensation components for the Pseudo Type III
Transconductance Error Amplifier can be calculated using
the method described below. The method serves to provide
R 1 = Top resistor divider
R 2 = Bottom resistor divider
V OUT = Output voltage
V REF = Regulator reference voltage
The most frequently used output voltages and their
associated standard R 1 and R 2 values are listed in Table 5.
Table 5. OUTPUT VOLTAGE SETTINGS
V O (V) R 1 (k W ) R 2 (k W )
a good starting place for compensation of a power supply.
The values can be adjusted in real time using the
compensation tool comp calc, available for download at
ON Semiconductor ’s website.
The value of the feed through resistor should always be at
least 2X the value of R 2 to minimize error from feed through
noise. Using the 2X assumption, R F will be set to 20 k W and
the feed through capacitor can be calculated as shown
below:
0.8
1.0
1.1
1.2
1.5
1.8
2.5
3.3
5.0
1.0
2.55
3.83
4.99
10
12.7
21.5
31.6
52.3
Open
10
10.2
10
11.5
10.2
10
10
10
http://onsemi.com
15
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