L9777A STMicroelectronics

L9777 Low power voltage regulator Datasheet - production data Adjustable reset threshold External capacitor to set NMI/ reset power up delay and watchdog frequency Over temperature protection Wide temperature range (T = -40 C to 150 C) J Short circuit proof PowerSSO-12 (exposed DIE Pad) Suitable for use in automotive electronics Description Features The L9777 is a monolithic integrated low drop Operating DC supply voltage range 5.6 V to regulator which can supply up to 200 mA, 31 V available in the PowerSSO-12 package. Low current consumption (110 A typ I = 0) out It is designed to supply microprocessor systems High precision output voltage (2 %) under severe conditions of automotive applications and therefore equipped with Low dropout voltage additional protection functions against over load, VDD tracking regulator switchable on/off by short circuit and over temperature. VDD EN pin Of course the L9777 can also be used in other Reset circuit sensing the output voltage down applications where a regulated voltage is to 1 V. required. Double reset function Table 1. Device summary Order code Package Packing L9777A PowerSSO-12 Tray L9777B PowerSSO-12 Tray L9777B13TR PowerSSO-12 Tape and reel L9777C PowerSSO-12 Tray L9777C13TR PowerSSO-12 Tape and reel February 2014 DocID13496 Rev 4 1/25 This is information on a product in full production. www.st.com 0 03 Contents L9777 Contents 1 Block diagrams and pins configuration . 5 1.1 Block diagram (option A) 5 1.2 Option B features 5 1.3 Option C features 7 2 Absolute maximum ratings . 9 3 Functional description 11 3.1 Voltage regulator . 11 3.2 Reset 11 3.3 NMI and RESET driver delay 13 3.4 RESET adjustable threshold 14 3.5 Watchdog . 14 4 VDD regulated voltage 16 5 VDD LOW (option C) . 17 6 Device options . 18 6.1 Option A 18 6.2 Option B 18 6.3 Option C 18 7 Electrical and thermal characteristics 19 8 Package information 23 9 Revision history . 24 2/25 DocID13496 Rev 4