RHFL4913XX25 RHFL4913XX33 - RHFL4913XX50 Rad-hard positive fixed voltage regulator Features 2 and 3 A low dropout voltage Embedded overtemperature, overcurrent protections Adjustable current limitation SMD.5 Flat-16 Output overload monitoring/signalling Fixed 2.5 V, 3.3 V, 5.0 V output voltages Inhibit (ON/OFF) TTL-compatible control Programmable output short-circuit current Remote sensing operation TO-257 Rad-hard: tested up to 300 krad Mil Std 883E Method 1019.6 and low dose rate conditions specifically intended for space and harsh radiation environments. Input supply range is up to 12 V. Heavy Ions SEL immune RHFL4913 fixed is QML-V qualified, DSCC SMD are 5962F02534 / 02535 / 02536. Description The RHFL4913 fixed is a high performance Rad- hard positive voltage regulator family. Available in various hermetic ceramic packages, it is Figure 1. Block diagram for package SMD.5 and TO-257 December 2011 Doc ID 10004 Rev 13 1/19 www.st.com 19Contents RHFL4913XX25, RHFL4913XX33, RHFL4913XX50 Contents 1 Diagram . 3 2 Pin configuration 4 3 Maximum ratings 5 4 Electrical characteristics . 6 5 Device description 8 5.1 Low pin count package limitations . 8 5.2 SENSE pin . 8 5.3 Inhibit ON-OFF control 8 5.4 Overtemperature protection 8 5.5 Overcurrent protection 8 5.6 OCM pin . 9 5.7 Alternate to . 9 6 Application information . 10 6.1 Remote sensing operation 10 7 Notes about Flat-16 package . 11 7.1 Radiation performances 11 7.2 Die information . 11 8 Package mechanical data 12 9 Ordering information . 16 10 Revision history . 18 2/19 Doc ID 10004 Rev 13