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L4953K Datasheet(PDF) 1 Page - STMicroelectronics

Part # L4953K
Description  MULTIFUNCTION VOLTAGE REGULATOR FOR CAR RADIO
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L4953K Datasheet(HTML) 1 Page - STMicroelectronics

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L4953K
MULTIFUNCTION VOLTAGE REGULATOR FOR CAR RADIO
3 OUTPUTS:
8.25V
(500mA);
5V
(1A);
5V
(100mA)
STANDBY
OUT1 (8.25V) AND OUT2 (5V) WITH INDE-
PENDENT ENABLE CONTROL FOR STAND-
BY 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
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 sup-
ply capacitor that will hold enough energy for the
5V Stand-by line to allow the
µP to store data.
This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
June 2000
®
5V, 100mA
REGULATOR
STAND-BY
LOAD DUMP
AND REV
BATT PROT
REF
GEN
5V, 1000mA
REGULATOR
SWITCHED
8.25V, 500mA
REGULATOR
SWITCHED
16V, 1.5A
VOLTAGE CLAMP
SWITCHED
OVERVOLTAGE
UNDERVOLTAGE
THERMAL PROT
RESET
VCAP
Vref1 LVW THRESHOLD
Vref2 Reset THRESHOLD
IGNITION THRESHOLD
PROT
VS
7
SIG GND
3
EN 5V
1
STCAP
12
EN 8.25V
2
EN 16V
15
11
STAND-BY 5V
9
OUT 5V
10
OUT 8.25V
4
OUT 16V
14
13
6
IGN OUT
LVW/FAULT
RESET
IGN INP
5
D94AU213B
POW GND
8
BLOCK DIAGRAM
Multiwatt 15
ORDERING NUMBER: L4953K
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