L4951

L4945/L4950 L4951 5V/8.5V/10V VERY LOW DROP VOLTAGE REGULATORS PRECISE OUTPUT VOLTAGE: 5V ± 4% (L4945) 8.5V ± 4% (L4950) 10V ± 4% (L4951) OVER FULL TEMPERATURE RANGE (– 40 / 125 °C) VERY LOW VOLTAGE DROP (0.75Vmax) OVER FULL TEMPERATURE RANGE OUTPUT CURRENT UP TO 500mA OVERVOLTAGE AND REVERSE VOLTAGE PROTECTIONS REVERSE VOLTAGE PROTECTION SHORT CIRCUIT PROTECTION AND THERMAL SHUT-DOWN (with hysteresis) LOW START UP CURRENT DESCRIPTION The devices are a monolithic integrated circuit in Versawatt package specially designed to provide a stabilized supply voltage for automotive and industrial electronic systems. Thanks to their very BLOCK DIAGRAM TO220 ORDERING NUMBER: L4945 L4950 L4951 low voltage drop, in automotive applications the devices can work correctly even during the cranking phase, when the battery voltage could fall as low as 6V. Furthermore, they incorporate a complete range of protection circuits against the dangerous overvoltages always present on the battery rail of the car. This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice. October 1992 1/6 Free Datasheet http://www.datasheet4u.net/ L4945 - L4950 - L4951 ABSOLUTE MAXIMUM RATINGS Symbol Vi Parameter DC Input Voltage DC Reverse Input Voltage Transient Input Overvoltages : Load Dump : 5ms ≤ trise ≤ 10ms τf Fall Time Constant = 100ms RSOURCE ≥ 0.5Ω Field Decay : 5ms ≤ tfall ≤ 10ms, RSOURCE ≥ 10Ω τr Rise Time Constant = 33ms L...