参数资料
型号: XC9243B08DDR-G
厂商: Torex Semiconductor Ltd
文件页数: 10/29页
文件大小: 0K
描述: IC REG BUCK SYNC ADJ 2A USP-10B
标准包装: 3,000
类型: 降压(降压)
输出类型: 可调式
输出数: 1
输出电压: 0.9 V ~ 6 V
输入电压: 2.7 V ~ 6 V
频率 - 开关: 2.4MHz
电流 - 输出: 2A
同步整流器:
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 10-UFDFN 裸露焊盘
包装: 带卷 (TR)
供应商设备封装: USP-10B
<PFM Switch Current>
XC9242/XC9243 Series
■ OPERATIONAL DESCRIPTION (Continued)
(*1)
In PFM control operation, until coil current reaches to a specified level (IPFM), the IC keeps the P-channel MOS driver transistor on.
case, time that the P-channel MOS driver transistor is kept on (t ON ) can be given by the following formula. Please refer to I PFM ①
t ON = L × I PFM / (V IN - V OUT )
In this
< PFM Duty Limit >
(*1)
In PFM control operation, the PFM duty limit (DTY LIMIT_PFM ) is set to 200% (TYP.).
Therefore, under the condition that the duty increases (e.g.
the condition that the step-down ratio is small), it’s possible for P-channel MOS driver transistor to be turned off even when coil current doesn’t
reach to IPFM.
Please refer to I PFM ②
(*1)
XC9242 Series is excluded.
10/29
Fig.
Fig.
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