欢迎访问ic37.com |
会员登录 免费注册
发布采购

VRH3002LVX 参数 Datasheet PDF下载

VRH3002LVX图片预览
型号: VRH3002LVX
PDF下载: 下载PDF文件 查看货源
内容描述: 高速,低压差, 1 %高输出精度CMOS电压稳压器具有ON / OFF电路 [High speed, Low dropout, 1% High output accuracy CMOS Voltage Regulator with On/Off circuit]
分类和应用: 稳压器
文件页数/大小: 35 页 / 1448 K
品牌: ANASEM [ AnaSem Hong Kong Limited ]
 浏览型号VRH3002LVX的Datasheet PDF文件第5页浏览型号VRH3002LVX的Datasheet PDF文件第6页浏览型号VRH3002LVX的Datasheet PDF文件第7页浏览型号VRH3002LVX的Datasheet PDF文件第8页浏览型号VRH3002LVX的Datasheet PDF文件第10页浏览型号VRH3002LVX的Datasheet PDF文件第11页浏览型号VRH3002LVX的Datasheet PDF文件第12页浏览型号VRH3002LVX的Datasheet PDF文件第13页  
High speed, Low dropout, ±1% High output accuracy with On/Off circuit CMOS Voltage Regulator  
Rev. E13-01  
VRH Series  
DESCRIPTION OF OPERATION  
ò General operation  
In reference to following block diagram of the VRH series ;  
*1)  
V
IN  
V
OUT  
Over-current  
Protector  
R1  
RDIS  
VFEEDBACK  
R2  
+
VREF  
Voltage  
Reference  
_
Error Amp.  
V
SS  
EN  
4M  
By the error amplifier, the reference voltage (VREF) is compared with VFEEDBACK which is divided by  
feedback resistors R1 and R2. It supplies the output transistor (see note *1) to keep a stabilized output  
voltage against with any fluctuation of input voltage by negative feedback system.  
Note *1)  
The VRH series has P-channel MOSFET which is connected to the VOUT terminal as the output  
transistor. To prevent the VRH series from being damaged due to inverse current from VOUT  
terminal to VIN terminal through a parasitic diode, VOUT should not be exceeded VIN+0.3V.  
ò EN terminal (shutdown function) & CL auto-discharge  
The VRH series can be shutdown through EN terminal. The P-channel MOSFET is turned off and  
operation of all internal circuits stops to reduce the current consumption when the signal of EN  
terminal is set to the shutdown level. In shutdown mode, the VRH series enables the electric charge at  
the C  
L to be discharged via the auto-discharge resistance (RDIS ; 160), and the VOUT terminal can be  
rapidly returned to the VSS level as a result.  
ò Output capacitor (C  
For phase compensation, an output capacitor (C  
SS terminal as close as possible. A ceramic capacitor with capacitance value of at least 1.0µF is  
L)  
L) is required to connected between VOUT terminal and  
V
recommended. Of course, the suitable capacitance value should be different by the condition of each  
application. In addition, an input capacitor (CIN) with capacitance value of at least 1.0µF is also  
recommended between VIN terminal and VSS terminal for stable input power.  
ò Over current protection and short circuit protection  
Built-in over current protection circuit performs circuit protection from over current as a current limiter.  
When the load current reaches the limit level, the output voltage drops and output current also  
decreases accordingly. A current of typ. 40mA will flow when output terminal is shorted.  
AnaSem  
8
.......... Future of the analog world  
www.anasemi.com  
sales@anasemi.com  
 复制成功!