欢迎访问ic37.com |
会员登录 免费注册
发布采购

SMM150NCR01 参数 Datasheet PDF下载

SMM150NCR01图片预览
型号: SMM150NCR01
PDF下载: 下载PDF文件 查看货源
内容描述: 单通道电源电压Marginer /监视器 [Single-Channel Supply Voltage Marginer/Monitor]
分类和应用: 监视器
文件页数/大小: 22 页 / 383 K
品牌: SUMMIT [ SUMMIT MICROELECTRONICS, INC. ]
 浏览型号SMM150NCR01的Datasheet PDF文件第1页浏览型号SMM150NCR01的Datasheet PDF文件第3页浏览型号SMM150NCR01的Datasheet PDF文件第4页浏览型号SMM150NCR01的Datasheet PDF文件第5页浏览型号SMM150NCR01的Datasheet PDF文件第6页浏览型号SMM150NCR01的Datasheet PDF文件第7页浏览型号SMM150NCR01的Datasheet PDF文件第8页浏览型号SMM150NCR01的Datasheet PDF文件第9页  
SMM150  
Preliminary Information  
GENERAL DESCRIPTION  
VM input. This operation is repeated until the 2 values  
are equal, after which the SMM150 holds the TRIM  
output pin at the voltage required to maintain the  
margin setting. An I2C command or de-assertion of the  
MUP/MDN pin will return the TRIM output pin to a high  
impedance state thus allowing the converter to return  
to its nominal operating voltage.  
The SMM150 is capable of margining the DC output  
voltage of LDOs or DC/DC converters that use a  
trim/adjust pin. The Margin function is programmable  
over a standard 2-wire I2C serial data interface and is  
used to set the margin low/high DC output voltages.  
In margining mode the user communicates with the  
SMM150 via the I2C serial data bus to select the  
desired values for margining. This allows the part to  
margin the supplies up or down to these set values  
either through asserting the MUP and MDN pins or by  
writing to the margin register directly. The margin high  
and margin low voltage settings can range from 0.3V  
to VDD around the converter’s nominal output voltage  
setting depending on the specified margin range of the  
DC-DC converter and/or system components, usually  
The SMM150 has two additional input pins and one  
additional output pin. The input pins, COMP1 and  
COMP2, are high impedance inputs, each connected  
to a comparator and compared against the internal  
reference (VREF, 0.5V or 1.25V). Each comparator  
can be independently programmed to monitor for UV  
or OV. When either of the COMP1 or COMP2 inputs  
are in fault the open-drain FAULT# output will be  
pulled low. A configuration option exists to disable the  
FAULT# output during margining.  
±10%.  
When the SMM150 receives the command to margin,  
the TRIM output will begin adjusting the supply to the  
selected margin voltage. This is accomplished by  
incrementing (or decrementing) an internal counter  
based on the digital comparison between the voltage  
margin target value and that read by the ADC from the  
Programming of the SMM150 is performed over the  
industry standard I2C 2-wire serial data interface. A  
status register is available to read the state of the part  
and a Write Protect (WP) pin is available to prevent  
writing to the configuration registers and EE memory.  
Summit Microelectronics, Inc  
2075 2.6 05/13/05  
2