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Número de pieza | L5956 | |
Descripción | Multifunction voltage regulator | |
Fabricantes | STMicroelectronics | |
Logotipo | ||
Hay una vista previa y un enlace de descarga de L5956 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
No Preview Available ! L5956
Multifunction voltage regulator for car radio
Features
■ Four outputs:
– 8.5V @ 500mA
– 5V @ 300mA Permanent
– 5V @ 800mA
– 3.3V @ 800mA
■ 2A high side driver
■ Reset function
■ Ignition comparator
■ Load dump protection
■ Thermal shutdown
■ Overcurrent limitation
■ All pins ESD protected
Table 1. Device summary
Order code
L5956
L5956PD
L5956PDTR
PowerSO20 (slug-up) Multiwatt15 (vertical)
Description
The L5956 contains a triple voltage regulator and
a power switch.
The IC includes a monitoring circuit for detection.
The IC features a very low quiescent under stand-by.
Package
Multiwatt-15 (vertical)
PowerSO-20
PowerSO-20
Packing
Tube
Tube
Tape and reel
August 2007
Rev 1
1/16
www.st.com
1
Free Datasheet http://www.datasheet4u.com/
1 page L5956
1
Block diagram and pins description
Block diagram and pins description
1.1 Block diagram
Figure 1. Block diagram
VINI (MAIN)
EN_SW
EN 1_3(8.5V_5V)
BU
VIN2
EN 4(3.3V)
POWER
SWITCH
REG1
REG2
REG3
REG4
THERMAL DUMP LOAD
PROTECTION PROTECTION
IGNIN
IGNITION
BUFFER
IGNOUT
SW
REG 1(8.5V)
REG 2(PERM)(5V)
REG 3(5V)
REG 4(3.3V)
HOLD
RESET
BUFFER
RES
CRES
D02AU1342
1.2 Pins description
Figure 2. Pins connection (top view)
VIN2
REG3(5V)
N.C.
REG1(8.5V)
SW
N.C.
VIN1
BU
REG2(5V)
HEATSINK
20
19
18
17
16
15
14
13
12
11
D02AU1343
1
2
3
4
5
6
7
8
9
10
PowerSO
REG4(3.3V)
IGNIN
IGNOUT
RES
CRES
ENREG4(3.3V)
ENREG1_3(8.5V_5V)
EN_SW
HOLD
GND
15 VIN2
14 REG3
13 REG1
12 SWITCH
11 BU
10 REG2
9 VIN1
8 GND
7 HOLD
6 EN SW
5 EN REG1,3
4 EN REG4
3 CRES
2 RES
1 REG4
Multiwatt
D03AU1513
5/16
Free Datasheet http://www.datasheet4u.com/
5 Page L5956
Timing diagrams
Figure 6. Hold and thermal protection
DUMP
VIN1
22
18
9
9.5V
8.5V
5V
3.3V
5
HOLD
TEMPERATURE
PROTECTION
8.5V
REG1(8.5V)
5V
REG2(5V)
5V
REG3(5V)
3.3V
REG4(3.3V)
5V
EN1-3
EN4
Figure 7. Ignition buffer diagram
50V
IGNITION
INPUT1.27V
1.17V
IGNITION
OUTPUT
14V
VIN1
Figure 8. Protection of the power switch
VSW
16V
ON T≅160
D02AU1423A
LOAD DUMP
D02AU1424
DELAYED
NOT
IN CASE
DELAYED VIN1 <16V
1.5A
3A
D02AU1425
ISW
11/16
Free Datasheet http://www.datasheet4u.com/
11 Page |
Páginas | Total 16 Páginas | |
PDF Descargar | [ Datasheet L5956.PDF ] |
Número de pieza | Descripción | Fabricantes |
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