L4953G
DESCRIPTION
The L4953G contains a triple voltage regulator and a power switch. BLOCK DIAGRAM
VS 7
Multiwatt15
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.
LOAD DUMP POW GND 3
5V, 100m A REGULATOR STAND-BY 5V, 1000m A REGULATOR SWITCHED
11 STAND-BY 5V
OUT 5V
EN 5V STCAP EN 9.2V
1 12 9.2V, 500m A REGULATOR SWITCHED 10
OUT 9.2V
2 16V, 2A VOLTAGE CLAMP SWITCHED 4
OUT 16V
EN 16V
15 VCAP REF GEN Vref1 LVW THRESHOLD Vref2 Reset THRESHOLD IGNITION THRESHOLD OVERVOLTAGE UNDERVOLTAGE THERMAL PROT RESET
IGN INP
PROT
SIG GND 8 6
D97AU579
13 LVW/FAULT
14 RESET
IGN OUT
April 1999
This is preliminary information on a new product now in development. Details are subject to...
