L5956 Datasheet PDF - STMicroelectronics

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L5956
STMicroelectronics

Part Number L5956
Description Multifunction voltage regulator
Page 16 Pages


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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
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Contents
Contents
L5956
1 Block diagram and pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2 Pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3 Timing diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
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L5956
List of tables
List of tables
Table 1.
Table 2.
Table 3.
Table 4.
Table 5.
Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
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List of figures
List of figures
L5956
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Figure 11.
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Pins connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Typical application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Timing diagram of regulators and power switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Backup and reset diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Hold and thermal protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Ignition buffer diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Protection of the power switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Short circuit diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
PowerSO20 (slug-up) mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . 13
Multiwatt 15 (vertical) mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . 14
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