ST L4953G User Manual
® |
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 OUTPUT (16V)
LOGIC OUTPUT FOR:
–SUPPLY UNDERVOLTAGE (LVW)
–OVERVOLTAGE
–THERMAL PROTECTION
RESET FUNCTION IGNITION COMPARATOR
REVERSE BATTERY AND LOAD DUMP PROTECTION
THERMAL SHUTDOWN
DESCRIPTION
The L4953G contains a triple voltage regulator and a power switch.
BLOCK DIAGRAM
PRELIMINARY DATA
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.
7 |
|
11 |
VS |
5V, 100mA |
|
|
REGULATOR |
STAND-BY 5V |
|
STAND-BY |
|
|
LOAD DUMP |
|
3 |
5V, 1000mA |
9 |
POW GND |
REGULATOR |
OUT 5V |
|
|
|
|
SWITCHED |
|
1 |
|
|
EN 5V |
|
|
12 |
9.2V, 500mA |
10 |
STCAP |
REGULATOR |
OUT 9.2V |
|
SWITCHED |
|
2 |
|
|
EN 9.2V |
|
|
|
16V, 2A |
4 |
|
VOLTAGE CLAMP |
OUT 16V |
|
|
|
|
SWITCHED |
|
15 |
|
|
EN 16V |
VCAP |
|
|
|
|
|
REF |
Vref1 LVW THRESHOLD |
OVERVOLTAGE |
|
|
|
UNDERVOLTAGE |
|||
|
|
GEN |
|
||
|
|
Vref2 Reset THRESHOLD |
THERMAL PROT |
||
|
|
|
|||
5 |
|
|
|
RESET |
|
PROT |
IGNITION THRESHOLD |
|
|
||
IGN INP |
|
|
|||
SIG GND |
|
|
|
|
|
8 |
|
|
|
|
|
|
|
6 |
13 |
|
14 |
D97AU579 |
|
IGN OUT |
LVW/FAULT |
RESET |
|
April 1999 |
1/6 |
|
|
This is preliminary information on a new product now in development. Details are subject to change without notice.
L4953G
ABSOLUTE MAXIMUM RATINGS
Symbol |
Parameter |
Value |
Unit |
VSDC |
DC Operating Supply Voltage |
–0.6 to 28 |
V |
VSTR |
Transient Supply Voltage |
50 |
V |
IO |
Output Current |
internally limited |
|
Top |
Operating Temperature Range |
–40 to 85 |
°C |
Tstg |
Storage Temperature |
–55 to 150 |
°C |
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 |
VS |
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 |
Rth j-case |
Thermal Resistance Junction-case |
2 |
°C/W |
2/6
Loading...