L4812

L4805-L4885-L4892 L4808-L4810-L4812 VERY LOW DROP VOLTAGE REGULATORS . . . . . . . INPUT/OUTPUT DROP TYP. 0.4V 400mA OUTPUT CURRENT LOW QUIESCENT CURRENT REVERSE POLARITY PROTECTION OVERVOLTAGE PROTECTION (± 60V) FOLDBACK CURRENT LIMITING THERMAL SHUTDOWN DESCRIPTION L4800 series devices are voltage regulators with a very low voltage drop (typically 0.4V at full rated current), output current up to 400mA, low quiescent current and comprehensiveon-chip protection.These devices are protected against load dump and field decay transients of ± 60V, polarity reversal and overheating. A foldback current limiter protects against load short circuits. Available in 5V, 8.5V, 9.2V,10V and12V versions (all ± 4%, TI = 25°C) these regulators are designed for automotive, industrial and consumer applications where low consumption is particularly important. BLOCK DIAGRAM SO T-82 TO-220 In automotive applications the L4805 is ideal for 5V logic supplies becauseit can operateeven when the batteryvoltage falls below 6V. In battery backup and standby applications the low consumption of these devices extends battery life. March 1992 1/7 L4805-L4808-L4885-L4892-L4810-L4812 ABSOLUTE MAXIMUM RATINGS Symbol VI DC Input Voltage DC Input Reverse Voltage Transient Input Overvoltages : Load Dump : 5ms < Trise < 10ms, Parameter Value + 35 - 18 60 Unit V V V R source < 0.5Ω Field Decay : 5ms < tfall < 10ms, Rsource < 10Ω τf Fall Time Constant = 100ms, τr Rise Time Constant = 33ms - 60 V Tj, Tstg...