DESCRIPTION

The L4953K contains a triple voltage regulator and a power switch.

The IC includes a monitoring circuit to warn if a low voltage or no voltage condition is occuring.

In stand-by output is active as long as possible even when in thermal shutdown or any other fault conditions.

The STCAP pin allows the use of a reserve supply capacitor that will hold enough energy for the 5V Stand-by line to allow the µP to store data.

■ 3 OUTPUTS: 8.25V (500mA); 5V (1A); 5V (100mA) STANDBY

■ OUT1 (8.25V) AND OUT2 (5V) WITH INDEPENDENT ENABLE CONTROL FOR STANDBY MODE

■ 1.5A HIGH SIDE DRIVER WITH CLAMPED OUTPUT (16V)

■ LOGIC OUTPUT FOR:

– SUPPLY UNDERVOLTAGE (LVW)

– OVERVOLTAGE(FAULT)

– THERMAL PROTECTION (FAULT)

■ RESET FUNCTION

■ IGNITION COMPARATOR

■ REVERSE BATTERY AND LOAD DUMP PROTECTION

■ THERMAL SHUTDOWN