LM9073 Datasheet | National Semiconductor

Description The LM9073 is a high performance voltage regulator system with operational and protection features that address many requirements of automotive applications. Two regulated outputs are provided. The main regulator provides a precision 2% tolerance 5V output at 700m A with a low dropout characteristic. The second output, an External Supply regulator, provides a 5V output with 2% tolerance for load currents up to 100m A. This External Supply output is fully protected from short circuit to ground or the unregulated input supply (ignition or battery potentials in automotive applications) which makes it suitable for powering remotely located load circuits or sub-systems. The LM9073 also contains a programmable delayed system reset output. Two control inputs are provided. An ON/OFF input intended for connection to an ignition switch, and a Keep Alive input whereby a system can remain powered after ignition has been switched OFF. Additionally, a watchdog function is built in to enhance system operationally reliability. For EMC concerns the LM9073 remains fully operational and does not generate false rest signals while subjected to greater than 100m A, 1MHz to 400MHz bulk current injection signals on the input supply and External Supply output lines. Features n n n n n n n n n n n n n n Two 5V regulated outputs: 700m A, 2% Main output 100m A, 2% External Supply output External Supply output protected from shorts to battery Good EMI (1MHz to 400MHz, BCI) immunity Separate ON/OFF and Keep-Alive control inputs Less than 100µA quiescent current in OFF state Programmable delayed reset output Adjustable threshold voltage for generating reset Built-in system watchdog timer Input transient protection over 60V to - 45V Less than 1V dropout at full load Wide - 40˚C to 125˚C operating temperature range Surface mount, TO- 263 and standard TO- 220 power packages Applications n Automotive module supply power conditioning n Remote sub- system powering n Continuous operation for save...