L5962 STMicroelectronics

L5962 Multiple linear/switching voltage regulator for car-radio Features Step-down synchronous switching voltage regulator Internal high-side/ Low-side NDMOS 1.2 < V < 8 V selectable through external out resistors PowerSO36 (slug-up) 1.2/2.5 A load current selected through dedicated pin 185 kHz free-run frequency 2 Enable pin to drive switching regulator and I C SYNC function (220 < f < 400 kHz) sw bus logic Linear regulators Under/over voltage battery detector 3.3/5 V 150 mA standby regulator (VBATVW) selected through dedicated pin Under voltage threshold adjustable through (VSTBYSEL) dedicated pin (LVWIN) 5/8.5 V 350 mA switched linear regulator 2 Load dump protection enabled and selected through I C bus (VLR1) Independent thermal protection on all regulators 3.3/10 V 1 A switched linear regulator 2 enabled and selected through I C bus (VLR2) Description 2 High side drivers (0.5 V max drop 0.5 A) L5962 is a very versatile device exploiting BCD 2 enabled through I C bus and equipped with technology characteristics to provide a complete protection circuit against: set of regulated voltages covering all the needs of short to ground and battery a car-radio set. loss of ground and battery In standby condition the device guarantees unsupplied short to battery extremely low quiescent current (90 A max - Reset function with configurable delay (RST, 40 C < T < 85 C) and minimum operating RSTDLY) voltage (4.5 V using an external Schottky diode 2 for the back-up function). I C bus Table 1. Device summary Order code Package Packing L5962 PowerSO36 Tray L5962TR PowerSO36 Tape and reel September 2013 Doc ID 16819 Rev 3 1/24 www.st.com 1Contents L5962 Contents 1 Block and application diagram 5 2 Pin description . 7 3 Electrical specification . 9 3.1 Absolute maximum ratings . 9 3.2 Thermal data . 9 3.3 Electrical characteristics . 9 4 Device description . 15 4.1 Regulators 15 4.1.1 Linear regulators 15 4.1.2 Switching regulator 16 4.2 High side drivers 17 5 Operating mode 18 5.1 Battery detection . 18 2 6I C bus interface . 19 6.1 Data validity . 19 6.2 Start and stop conditions . 19 6.3 Byte format 19 6.4 Acknowledge 19 7 Software specifications . 21 8 Package information 22 9 Revision history . 23 2/24 Doc ID 16819 Rev 3