ST L5958 User Manual
Features
■ L5958 six outputs:
– 8.5 V @ 200 mA
– 5.0 V @ 300 mA
– 3.3 V @ 250 mA
– 1.8 V @ 350 mA
– 3.3 V @ 100 mA standby
– 1.8 V @ 100 mA standby
■ 2 A high side driver
■ Reset function
■ VDD core reset function
■ Battery audio warning
■ Battery can warning
■ Ignition comparator
■ Load dump protection
■ Thermal shutdown
■ Overcurrent limitation
■ All pin ESD protected
L5958
Multifunction voltage regulator for car radio
Flexiwatt27
(vertical)
The two 3.3 V (REG5) and 1.8 V (REG6) stand-by
regulators can reach a quasi-zero current
consumption when switched off.
The device is equipped with two different reset
buffers to control the operating voltages: the reset
which checks the two stand-by outputs, 3.3V and
1.8 V, and the VDD core reset which checks the
linear switched outputs, 3.3 V and 1.8 V. It is also
equipped with two different battery voltage
warnings, provided by the Hold CAN and the Hold
audio detectors, with the possibility to program
the lower threshold through an external
resistance.
Flexiwatt27
(SMD)
Description
The L5958 includes 6 linear voltage regulators
and a 2 A power switch, working down to 4.5 V
battery level. All the voltage regulators can be
switched off through the three enable pins.
Table 1. Device summary
Order code Package Packing
L5958 Flexiwatt27 (vertical) Tube
L5958SM Flexiwatt27 (SMD) Tube
L5958SMTR Flexiwatt27 (SMD) Tape and reel
July 2010 Doc ID 17716 Rev 1 1/20
The ignition buffer completes the device.
A backup function is available through two pins
which needs to be connected to two independent
capacitors: one for the 3.3 V and 1.8 V linear
switched outputs and one for the 3.3 V and 1.8 V
standby outputs.
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1
Contents L5958
Contents
1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.4 Application diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.5 Timing diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2/20 Doc ID 17716 Rev 1
L5958 List of tables
List of tables
Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table 2. Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 3. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Table 4. Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Table 5. Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Table 6. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Doc ID 17716 Rev 1 3/20
List of figures L5958
List of figures
Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 2. Flexiwatt27 (SMD and vertical) pin connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 3. Application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 4. Regulator and power switch diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 5. Timing chart V
Figure 6. Timing chart 1.8 Vperm/3.3 Vperm and 1.8V sw/3.3 Vsw . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 7. Reset and BU1 backup diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 8. BU2 backup diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 9. Maximum ESR for stability (valid for all the regulator outputs) . . . . . . . . . . . . . . . . . . . . . . 15
Figure 10. Current limit of the power switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 11. Flexiwatt27 (vertical) mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . 17
Figure 12. Flexiwatt27 (SMD) mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . . 18
detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
batt
4/20 Doc ID 17716 Rev 1
L5958 Block diagram
1 Block diagram
Figure 1. Block diagram
VIN1
EN_SW
EN_3P3P -1P8P
BU1
EN_3P3SW_1P8SW
EN_8P5SW_5PSW
BU2
V IN2
POWER
SWITCH
1.8V perm
REGULATOR
V
ref
3.3V perm
REGULATOR
1.8V
REGULATOR
3.3V
REGULATOR
5V
REGULATOR
8.5V
REGULATOR
RES
BUF
SW
REG6
CRES
RES
REG5
REG4
VDD CORE
REG3
REG2
REG1
IGNIN
<5.37V
>18.55V
<8.65V
>16.55V
IGNOUT
LOAD
DUMP
PRE
WARN
CAN_PRETEMP
AUDIO_LOW_OUT
AUDIO_HIGH_OUT
AC00175
Doc ID 17716 Rev 1 5/20
Pin description L5958
2 Pin description
Figure 2. Flexiwatt27 (SMD and vertical) pin connection (top view)
SMD
Vertical
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
TAB
REG6(1P8P)
RES
BU1
CRES
REG5(3P3P)
GND
SW
EN_SW
AUDIO_LOW_IN
VDDCORE
VIN1
CAN_LOW_IN
AUDIO_HIGH_OUT
AUDIO_LOW_OUT
REG2(5V)
CAN_PRETEMP
REG1(8P5)
EN_8P5_5
REG4(1P8sw)
IGNOUT
VIN2
IGNIN
REG3((3P3sw)
EN_3P3_1P8
BU2
EN_3P3sw_1P8sw
D06AU1652B
EN_3P3sw_1P8sw
BU2
EN_3P3_1P8
REG3((3P3sw)
IGNIN
VIN2
IGNOUT
REG4(1P8sw)
EN_8P5_5
REG1(8P5)
CAN_PRETEMP
REG2(5V)
AUDIO_LOW_OUT
AUDIO_HIGH_OUT
CAN_LOW_IN
VIN1
VDDCORE
AUDIO_LOW_IN
EN_SW
SW
GND
REG5(3P3P)
CRES
BU1
RES
REG6(1P8P)
TAB
6/20 Doc ID 17716 Rev 1
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