L4953G STMicroelectronics

L4953G MULTIFUNCTION VOLTAGE REGULATOR FOR CAR RADIO 3 OUTPUTS: 9.2V (500mA) 5V (1A) 5V (100mA) STANDBY OUT1 (9.2V) AND OUT2 (5V) WITH INDEPENDENT ENABLE CONTROL FOR STANDBY MODE 2A HIGH SIDE DRIVER WITH CLAMPED Multiwatt15 OUTPUT (16V) ORDERING NUMBER: L4953G LOGIC OUTPUT FOR: SUPPLY UNDERVOLTAGE (LVW) OVERVOLTAGE (FAULT) THERMAL PROTECTION (FAULT) and a power switch. RESET FUNCTION The IC includes a monitoring circuit to warn if a low IGNITION COMPARATOR voltage or no voltage condition is occuring. In REVERSE BATTERY AND LOAD DUMP stand-by output is active as long as possible even PROTECTION when in thermal shutdown or any other fault con- THERMAL SHUTDOWN ditions. The STCAP pin allows the use of a reserve supply DESCRIPTION capacitor that will hold enough energy for the 5V Stand-by line to allow the P to store data. The L4953G contains a triple voltage regulator BLOCK DIAGRAM 7 V 5V, 100mA 11 S STAND-BY 5V REGULATOR STAND-BY LOAD DUMP 3 5V, 1000mA 9 POW GND OUT 5V REGULATOR SWITCHED 1 EN 5V 12 9.2V, 500mA 10 OUT 9.2V STCAP REGULATOR SWITCHED 2 EN 9.2V 16V, 2A 4 OUT 16V VOLTAGE CLAMP SWITCHED 15 EN 16V VCAP OVERVOLTAGE REF Vref1 LVW THRESHOLD UNDERVOLTAGE GEN THERMAL PROT Vref2 Reset THRESHOLD RESET 5 IGN INP PROT IGNITION THRESHOLD SIG GND 8 6 13 14 D97AU579 IGN OUT LVW/FAULT RESET September 2013 1/6L4953G ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit V DC Operating Supply Voltage 0.6 to 28 V SDC V Transient Supply Voltage 50 V STR I Output Current internally limited O T Operating Temperature Range 40 to 85 C op T Storage Temperature 55 to 150 C stg PIN CONNECTION (Top view) 15 EN 16V 14 RESET 13 LVW/FAULT 12 STCAP 11 STBY5V 10 OUT 9.2V 9 OUT 5V 8 PGND 7 V S 6 IGNOUT 5 IGNINP 4 OUT 16V 3 SGND 2 EN 9.2V 1 EN 5V TAB CONNECTED TO PIN 8 D97AU580 THERMAL DATA Symbol Parameter Value Unit R Thermal Resistance Junction-case Max. 2 C/W th j-case 2/6