GENERAL DESCRIPTION
Available in a SOT23-6 package, the Power Sequencer contains a precision enable pin and three open drain output flags. Upon enabling the LM3880 the three output flags will sequentially release, after individual time delays, permitting the connected power supplies to startup. Standard timing option of 30ms is available. EPROM capability allows every delay and sequence to be fully adjustable. Contact National Semiconductor if a nonstandard configuration is required. FEATURES
n n n n n n n Easiest method to sequence rails Power up and power down control Input voltage range of 2.7V to 5.5V Small footprint SOT23-6 Low quiescent current of 20 µA Standard timing options available Customization of timing and sequence available through factory programmability APPLICATIONS
n Multiple supply sequencing n Microprocessor / Microcontroller sequencing n FPGA sequencing Typical Application Circuit 20192601 © 2006 National Semiconductor Corporation DS201926 LM3880 Connection Diagram...
National Semiconductor
