参数资料
型号: NCP3122MNTXG
厂商: ON Semiconductor
文件页数: 23/42页
文件大小: 0K
描述: IC REG BUCK ADJ 2A DL 32QFN
产品变化通告: NCP312x Soft Start Charge 6/Nov/2008
标准包装: 4,000
类型: 降压(降压)
输出类型: 可调式
输出数: 2
输出电压: 可调至 0.8V
输入电压: 4.5 V ~ 15 V
频率 - 开关: 200kHz ~ 2.2MHz
电流 - 输出: 2A
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: 32-VFQFN 裸露焊盘
包装: 带卷 (TR)
供应商设备封装: 32-QFN(5x5)
NCP3122
Daisy Chain Operation
The last ? up/first ? down power output has its SEQ pin tied
to the EN of the first ? up/last ? down power output. Each
output in the chain has its power ? up delay set by the
soft ? start ramp ? up of the supply. This feeds its EN and its
power ? down delay set by the soft ? start ramp ? down of the
supply that feeds its SEQ pin.
ENABLE
SEQ
SS
C1
SEQ
SS
C2
SEQ
SS
C3
SEQ
SS
C4
DISABLE
EN
NCP3122
TRACK
EN
NCP3122
TRACK
EN
NCP3122
TRACK
EN
NCP3122
TRACK
Vout1
C1 C2
C3 C4
C4 C3
C2 C1
Vout2
Vout3
Vout4
Figure 47. Simplified Drawing of Daisy ? chained NCP3122’s
When the first voltage rail has reached a specific voltage
level, the next voltage rail is enabled and its rise is monitored
until it has reached the power good trip point. At this point,
voltage rails have been enabled (see Figure 48).
Power ? down sequencing is just the opposite of the
power ? up sequence.
the next voltage rail is enabled. This continues until all
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