L5964L-VYY STMicroelectronics

L5964 Automotive monolithic dual 3.5 A step-down switching regulator with LDO Datasheet - production data Independent voltage supervisors/power-goods with selectable thresholds through external pin: two available thresholds for UV/OV/PG signals: 90-120-95% or 80-110-85% (output voltage percentage) Soft-start, thermal protection LQFP64 One standby/linear regulator: (exposed pad up) Output selectable with external resistor divider till 10 V Soft start, hardware enable pin 250 mA maximum current capability Features Standby operative mode AEC-Q100 qualified Programmable power good thresholds (85% or 95% output voltage percentage) Two step-down synchronous switching voltage regulators with internal power switches: Thermal protection Wide operating input voltage range (from Microcontroller reset with programmable 3.3 V to 26 V) duration, activated by output under voltage or Output voltage selectable by external watchdog fault divider (feedback voltage at 0.9 V) External High Side Driver enable pin 0.9 V minimum output, maximum output ms One integrated window watchdog (5 limited by maximum Duty Cycle window 50 ms, with 20% tolerance) DC/DCs can work in Low Power Mode for Short circuit protected outputs reduced current consumption in low output Load Low external components number Internal high-side/ low-side NDMOS Low EMI 270 kHz and 2.2 MHz selectable free-run Thermal shutdown junction temperature 150C frequencies 125 kHz < f < 2.3 MHz synchronization Table 1. Device summary range at SYNCIN pin Order code Package Packing Programmable current limits at 2 A and 4 A L5964L-VYY LQFP64 exp. pad up Tray Independent hardware enabling pins Independent supply inputs L5964L-VYT LQFP64 exp. pad up Tape & Reel 180 phase shift between outputs Synch out 90 phase shift vs DC-DC1 Programmable switching frequency divider by 1, 2, 4, 8 between the two regulators The two regulators can be paralleled July 2019 DS12453 Rev 2 1/50 This is information on a product in full production. www.st.comContents L5964 Contents 1 Description . 6 2 Pins description 8 2.1 LQFP64 pins description 8 3 Block diagram . 12 4 Application diagrams . 13 5 Electrical specifications . 14 5.1 Absolute maximum ratings 14 5.2 Operating voltage . 15 5.3 Thermal data 15 5.4 Electrical characteristics 16 5.5 Electrical characteristic curves . 21 6 Functional description 22 6.1 Block description . 22 6.1.1 Switching regulators . 22 6.1.2 Low drop out (LDO) linear regulator . 23 6.2 Working modes 26 6.2.1 Shutdown mode . 26 6.2.2 Normal mode . 26 6.2.3 Microcontroller mode . 28 7 Application information . 36 7.1 Output inductor (L) 36 7.2 Output capacitors (C ) . 36 OUT 7.3 Input capacitors (C ) 37 IN 7.4 Bootstrap capacitor (C ) . 38 BS 7.5 Compensation network . 38 7.6 Power good delay time setting . 41 7.7 Watch dog delay time setting 41 2/50 DS12453 Rev 2