L4938EPD STMicroelectronics

L4938ED L4938EPD Advanced voltage regulator Features Enable and sense inputs (EN, SI) protected against negative transients down to -5 V Reset threshold adjustable from 3.8 V to 4.7 V Extremely low quiescent current, 65 A (less than 90 A) in standby mode PowerSO-20 SO-20 Operating DC supply voltage range 5 V - 28 V Operating transient supply voltage up to 40 V High precision standby output voltage 5 V 1% with 100 mA current capability Description Output 2 voltage 5 V 2% with 400 mA current The L4938ED and L4938EPD are monolithic capability (ADJ wired to V ) OUT2 integrated dual voltage regulators with two very Output 2 voltage adjustable by external voltage low dropout outputs and additional functions such divider as power-on reset and input voltage sense. They Output 2 disable function for standby mode are designed for supplying microcomputer controlled systems especially in automotive applications. Table 1. Device summary Order codes Package Tube Tape and reel SO-20 L4938ED L4938ED013TR PowerSO-20 L4938EPD L4938EPD13TR September 2013 Doc ID 17243 Rev 2 1/20 www.st.com 1Contents L4938ED, L4938EPD Contents 1 Block diagram and pin description . 5 2 Electrical specifications 7 2.1 Absolute maximum ratings . 7 2.2 Thermal data . 8 2.3 Electrical characteristics . 8 3 Application information . 11 3.1 Functional description 11 3.2 Standby regulator .11 3.3 Output 2 voltage . 12 3.4 Reset circuit . 12 3.5 Sense comparator 13 3.6 Thermal protection . 13 3.7 Transient sensitivity . 13 3.8 Input protection 15 4 Package and packing information . 16 4.1 ECOPACK packages . 16 4.2 SO-20 package information . 16 4.3 PowerSO-20 package information 17 5 Revision history . 19 2/20 Doc ID 17243 Rev 2