L5963 Automotive dual monolithic switching regulator with LDO and HSD Datasheet - production data Independent current limit on all regulators Extremely low quiescent current in standby conditions 0 03 * 3*36 0 03 Power good / adjustable voltage detector PowerSSO-36 PowerSSO-36 outputs to realize customized power up/down VQFPN-48 (slug-up) (exposed pad) sequences Description Featuress L5963 is a dual step-down switching regulator AEC-Q100 qualified with internal power switches, high side driver and Two step-down synchronous switching voltage a low drop-out linear regulator that can operate as regulators with internal power switches: standby regulator or normal LDO. Wide input voltage range (from 3.5 V to 26 V) All the regulators can be connected directly to the Internal high-side/ low-side NDMOS vehicle battery. In addition to an adjustable 1 V minimum output voltage detector, voltage supervisors are 3.0 A load current available. 250 kHz free-run frequency The two DC-DC converters can work in free-run 250 kHz < f < 2 MHz synchronization range condition or synchronize themselves to an Integrated soft-start external clock. DC/DCs PWM outputs have a Independent hardware enable pins 180 phase shift. Independent power supply The high operating frequency allowed by the 180 PWM output phase shift synchronization input helps to reduce AM and FM Programmable switching frequency divider interferences and grants the use of small and low by 1, 2, 4 or 8 between the two DC/DC cost inductors and capacitors. regulators Power good function This IC finds application in the automotive segment, where load dump protection and wide One standby / linear regulator input voltage range are mandatory. Output voltage programmable with external resistor divider A slug-up package option is available for 250 mA maximum current capability applications which require heatsink use. Backup function In standby condition the device guarantees Power good function extremely low quiescent current (25 A typical One high side driver -40 C < T < 85 C) 0.5 V max drop 0.5 A Table 1. Device summary Protected against short to ground and battery, loss of ground and battery, Order code Package Packing unsupplied short to battery L5963DN-EHX Tube PowerSSO36 Programmable under voltage battery detector (exposed pad) L5963DN-EHT Tape & Reel Under voltage threshold adjustable through L5963U-KBX Tube PowerSSO36 dedicated pin (VDIN) (slug-up) L5963U-KBT Tape & Reel Load dump protection L5963Q-V0Y Tray VQFPN-48 Independent thermal protection on all L5963Q-V0T Tape & Reel regulators June 2017 DocID028553 Rev 3 1/49 This is information on a product in full production. www.st.comContents L5963 Contents 1 Overview 6 2 Block diagram 7 3 Application diagrams 8 4 Pins description . 10 5 Electrical specifications . 14 5.1 Absolute maximum ratings 14 5.2 Thermal data 14 5.3 Electrical characteristics 15 6 Functional Description 19 6.1 Operative modes . 19 6.2 Blocks functional description 19 6.2.1 Unregulated supply input voltage (VINLDO) . 19 6.2.2 Low voltage warning monitor (related pins: VDIN, VDOUT, VDDLY) . 19 6.2.3 Power-good reset (related pins: LDOOK, LDOOKDLY) . 20 6.2.4 Power-good function of DC/DC1 (related pins: SW1OK, SW1OKDLY) . 20 6.2.5 Over voltage shutdown . 20 6.2.6 Power ground (PGND1 and PGND2) 21 6.2.7 Signal ground (SGND) 21 6.2.8 PWM signal ground (SWGND) . 21 6.2.9 TAB 21 6.2.10 Linear regulator . 21 6.2.11 High-side driver (HSD) 23 6.2.12 Switching regulators . 25 7 Application information . 29 7.1 Output inductor (Lo) . 29 7.2 Output capacitors (COUT) 30 7.3 Input capacitors (C ) 31 IN 7.4 Bootstrap capacitor (CBOOT) . 31 2/49 DocID028553 Rev 3