– 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 codePackagePacking
L5958Flexiwatt27 (vertical)Tube
L5958SMFlexiwatt27 (SMD)Tube
L5958SMTRFlexiwatt27 (SMD)Tape and reel
July 2010Doc ID 17716 Rev 11/20
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.
12VIN1Power supply for Reg1,Reg2,Reg5,Reg6 and SWS
13CAN_LOW_INHold CAN Low threshold adjustmentI
14AUDIO_HIGH_OUTHold Audio High signal for MCU applicationO
removed suddenly, the energy stored in this
capacitor can still supply reg5 and reg6 for some
time.
I/O
15AUDIO_LOW_OUTHold Audio Low signal for MCU applicationO
16REG2(5V)Output of Reg2O
17CAN_PRETEMP
Hold can low signal or hold can high signal with
load dump detection or pretemp warning
18REG1(8P5)Output of Reg1O
19EN_8P5_5Enable signal for 5 V and 8.5 VI
20REG4(1P8sw)Output of Reg4 (1.8 V/350 mA)O
21IGNOUTIgnition signal outputO
22VIN2Power supply for Reg3 and Reg4S
23IGNINIgnition signal inputI
24REG3((3P3sw)Output of Reg3 (3.3 V / 250 mA)O
Enable signal for 3.3 Vperm and 1.8 Vperm.
25EN_3P3_1P8
A resistor of 1 kΩ in series to this control pin is
suggested.
Connect to a reserve capacitor. When battery is
26BU2
removed suddenly, the energy stored in this
capacitor can still supply reg3 and reg4 for some
I/O
time.
27EN_3P3sw_1P8swEnable signal for 3.3 V and 1.8 VI
O
I
Doc ID 17716 Rev 17/20
Electrical specificationsL5958
3 Electrical specifications
3.1 Absolute maximum ratings
Table 3.Absolute maximum ratings
Symbol Parameter Value Unit
V
DC operating supply voltage 30 V
SDC
Transient supply voltage 50 V
V
STR
Output current internally limited
I
O
T
T
T
V
pinMIN
Operating temperature range -40 to 105 °C
op
Storage temperature -55 to 150 °C
stg
Junction temperature -55 to 150 °C
j
Minimum pin voltage (EN_SW, AUDIO_LOW_IN,
CAN_LOW_IN, EN_8P5_5, IGNIN, EN_3P3_1P8,
-0.3V
EN_3P3sw_1P8sw)
3.2 Thermal data
Table 4.Thermal data
Symbol Parameter ValueUnit
R
Thermal resistance junction-to-case Max. 1.0°C/W
th j-case
3.3 Electrical characteristics
VS = 14.4 V; T
Table 5.Electrical characteristics
Symbol Parameter Test condition Min. Typ. Max. Unit
Input supplies
V
V
V
V
Input supply voltage 1 Operating 9 -18 V
in1
Input supply voltage 2 Operating 4.5 -18 V
in2
Input supply voltage 1 Reverse polarity -not operating -
in1
Input supply voltage 2 Reverse polarity -not operating -
in2
I
Total quiescent current
q
= 25 °C; unless otherwise specified
amb
Standby (-40 °C to 85 °C)
Perm reg on
Standby (25 °C) Perm reg off-410µA
Standby (-40 °C to 85 °C)
Perm reg off
-50 100 µA
-430µA
8/20Doc ID 17716 Rev 1
L5958Electrical specifications
Table 5.Electrical characteristics (continued)
Symbol Parameter Test condition Min. Typ. Max. Unit
Load dump
V
in1
Load dump
V
in2
Battery over voltage V
Battery over voltage V
242628 V
in1
in2
24 26 28 V
Regulator 1
V
o (8.5sw)
Output voltage 8.5V -8.0 8.5 8.9 V
ΔV Line regulation I = 20 0mA; 9 V < Vs < 18 V--50 mV
Load regulation I
ΔV
i
PSRR Supply voltage ripple rejection
Drop out voltage I
V
drop
I
m
Current limit R
= 1 to 20 0mA --100 mV
reg1
f = 1 kHz; V
Io = 200 mA
= 200 mA
reg1
= 0.5 Ω0.3 - 0.6 A
short
= 1.5 Vpp;
in1
(1)
--0.35 V
45 --dB
Regulator 2
V
Output voltage 5V -4.75 5 5.25 V
o (5Vsw)
ΔV Line regulation I = 300 mA; 9 V < Vs < 18 V --50 mV
Load regulation I
ΔV
i
PSRR Supply voltage ripple rejection
V
drop
I
m
Drop out voltage I
Current limit R
= 1 to 300 mA --100 mV
reg2
f = 1 kHz; V
Io = 300 mA
= 300 mA
reg2
= 0.5 Ω400 - 800 mA
short
= 1.5 Vpp;
in1
(1)
50 --dB
--0.45 V
Regulator 3
V
Output voltage 3.3V -3.15 3.303.45 V
o (3.3sw)
ΔV Line regulation I = 250 mA; 4.5 V < Vs < 18 V --50 mV
Load regulation I
ΔV
i
PSRR Supply voltage ripple rejection
V
drop
I
m
Drop out voltage I
Current limit R
= 1 to 250 mA --100 mV
reg3
f = 1 kHz; V
= 250 mA
I
o
= 250 mA
reg3
= 0.5 Ω400-800mA
short
= 1.5 Vpp;
in1
(1)
--0.75 V
50 --dB
Regulator 4
V
Output voltage 1.8V -1.73 1.80 1.90 V
o (1.8sw)
ΔV Line regulation I = 350 mA; 4.5 V< Vs < 18 V--50 mV
Load regulation I
ΔV
i
PSRR Supply voltage ripple rejection
V
drop
I
m
Drop out voltage I
Current limit R
= 1 to 350 mA --100 mV
reg4
f = 1 kHz; V
Io = 350 mA
= 35 0mA
reg4
= 0.5 Ω430 - 800mA
short
= 1.5 Vpp;
in1
(1)
--2.2 V
50 --dB
Doc ID 17716 Rev 19/20
Electrical specificationsL5958
Table 5.Electrical characteristics (continued)
Symbol Parameter Test condition Min. Typ. Max. Unit
Regulator 5
V
o (3.3perm)
Output voltage 3.3 V -3.153.30 3.45 V
ΔV Line regulation I = 100 mA; 9 V< Vs < 18 V--50 mV
Load regulation I
ΔV
i
PSRR Supply voltage ripple rejection
V
drop
I
m
Drop out voltage I
Current limit R
= 1 to 100 mA --100 mV
reg4
f = 1 kHz; V
Io = 100 mA
= 100 mA
reg4
= 0.5 Ω150 - 300 mA
short
= 1.5 Vpp;
in1
(1)
--0.7 V
50 --dB
Regulator 6
V
o (1.8perm)
Output voltage 1.8V -1.73 1.801.90 V
ΔV Line regulation I = 100 mA; 9 V < Vs < 18 V--50 mV
Load regulation I
ΔV
i
PSRR Supply voltage ripple rejection
V
drop
I
m
Drop out voltage I
Current limit R
= 1 to 100 mA --100 mV
reg4
f = 1 kHz; V
Io = 100 mA
= 100 mA
reg4
= 0.5 Ω150 - 300 mA
short
= 1.5 Vpp;
in1
(1)
--2.2 V
50 --dB
Power switch
V
dropSW
I
pSW1
I
pSW2
Drop voltage power switch I
Peak current power switch Peak time < 10 ms 2 -3.5 A
Peak current power switch Peak time > 40 ms 0.9-2 A
= 1.8 A max. --0.5 V
dcSW
SWDEL Delay Protection -10 -40 ms
Reset buffer (open drain RESET for permanent regulators)
RESr
eg5
V
hys_reg5
RES
reg6
V
hys_reg6
Low level I
V
ol
I
Lsink (RES)
RES delay C
ΔT
RES
I
Charge
I
Discharge
RES threshold voltage for reg5V
hysteresis of reset for reg51050100 mV
RES threshold voltage for reg6V
Hysteresis of reset for reg6102040mV
Low level sink current Reset = 5 V 15 2024mA
= 47nF 20 4270 ms
res
Reset rise and fall time R = 10 kΩ & C = 15 pF --50 µs
Charge current C
Discharge current C
= 3.3 V3.003.153.25V
reg5
= 1.8 V1.67-1.833V
reg6
SINK(RES)
RES
RES
= 1 mA -0.3 0.5 V
= 0 V 1 23 µA
= 5 V 0.5-3mA
10/20Doc ID 17716 Rev 1
L5958Electrical specifications
Table 5.Electrical characteristics (continued)
Symbol Parameter Test condition Min. Typ. Max. Unit
VDD_CORE_VAL buffer (open drain RESET for switched regulators)
RES
V
hys_reg3
RES
V
hys_reg4
reg3
reg4
RES threshold voltage for reg3V
Hysteresis of reset for reg3 -1050100mV
RES threshold voltage for reg4V
Hysteresis of reset for reg4-102040mV
Vol Low level I
= 3.3 V 3.00 3.15 3.25 V
reg3
= 1.8 V 1.67-1.833V
reg4
SINK(RES)
= 1 mA -0.3 0.5 V
Hold CAN signal (open drain for VIN1 battery warning 1)
Hold1_highHold high threshold-17-20V
V
HYS
Hysteresis high TH. -150400600mV
Hold1_lowHold low threshold -5-6V
V
HYS
Low level I
V
ol
V
REF
Hysteresis low TH. -200400600mV
SINK(RES)
= 1 mA -0.3 0.5 V
Reference voltage--1.2565-V
Hold audio signal (open drain for VIN1 battery warning 2)
Hold2_highHold high threshold-15.2-17.8V
V
HYS
Hysteresis high TH. -150400600mV
Hold2_lowHold low threshold-7.8-9.2V
V
HYS
Low level I
V
ol
V
REF
Hysteresis low TH. -200400600mV
SINK(RES)
= 1 mA -0.3 0.5 V
Reference voltage--1.2565-V
Ignition buffer (open drain)
I
IGN
IN
V
hys(IGNout)
Low level I
V
ol
IGN
IGN
I
Rising time C = 15 pF --10 µs
RISE
Fall time C = 15 pF --10 µs
FAL L
Input clamp current VCC < V
CLAMP
IGN
IN
falling -1.03 1.17 1.28 V
GNout
Hysteresis of ignition buffer -3050100mV
Lsink (IGNout)
= 1 mA -0.3 0.5 V
< 50 V --2 mA
IGN
Input voltage Operative 0 -50 V
Enable input (regulators 1,2,3,4,5,6 and power switch)
Voltage threshold -1.3 -2.3 V
V
TH
EN
IN(reg1,2,3,4
power switch)
EN
IN(reg5,6)
1. Drop condition means that the supply voltage drop down to 100 mV from the regulated output and the regulator is sourcing
its maximal load current
Input voltage Operative 0 -5 V
Input voltage Operative 0 -24V
Doc ID 17716 Rev 111/20
Electrical specificationsL5958
3.4 Application diagram
Figure 3.Application circuit
VIN1
VIN2
+-+
-
71
GNDTAB
1000µF0.1µF
20
10µF
24
10µF
2
10µF
6
10µF
18
10µF
16
10µF
11
8
14
15
17
3
REG4_1P8SW
REG3_3P3SW
REG6_1P8P
REG5_3P3P
REG1_8P5
REG2_5V
10k
VDDCORE
SW
10k
AUDIO_HIGH_OUT
10k
AUDIO_LOW_OUT
10k
CAN_PRETEMP
10k
RES
15pF
AC00567
R1
R2
CAN_LOW_IN
AUDIO_LOW_IN
EN_SW
EN_8P5_5
EN_3P3_1P8
EN_3P3SW_1P8SW
IGNIN
IGNOUT
BU1
BU2
CRES
R3
R4
1kΩ
REG 3P3P
0.1µF
1000µF
1222
13
10
9
19
25
27
23
10k
21
4
26
5
1000µF1000µF47nF
Recommended output filtering capacitors for all the regulators: C range = 5 µF to 100 µF,
ESR range = 50 mΩ to 10 Ω (T= -40 °C to +85 °C)
The detection voltage thresholds (for both the battery warning 1 and 2) can be changed
lower with external resistors, as following:
V
TH1(hold_can)
V
TH2(hold_audio)
12/20Doc ID 17716 Rev 1
= 1.25V (R3 + R4)/ R4
= 1.25V (R1 + R2)/R2
L5958Electrical specifications
Figure 4.Regulator and power switch diagram
VIN1
VIN2
EN_3P3_1P8
EN_3P3sw_1P8sw
EN_8P5_5
EN_sw
REG1
REG2
REG3
REG4
REG5
18V
DUMP
9V
DUMP
18V
4.5V
5V
5V
5V
5V
8.5V
5V
3.3V
1.8V
3.3V
REG6
SW
Temperature
Protection
1.8V
VIN1
AC00597
Doc ID 17716 Rev 113/20
Electrical specificationsL5958
2
3
3.5 Timing diagrams
Figure 5.Timing chart V
9.2Vmax
6Vmax
batt
17.8Vmax
detection
20Vmax
17V min
15.2V min
7.8V min
5.0V min
Hold CAN
low + high
Hold AUDIO Low
Hold AUDIO High
Figure 6.Timing chart 1.8 Vperm/3.3 Vperm and 1.8V sw/3.3 Vsw
AC0060
Vbatt
En_perm
3.3Vperm
1.8Vperm
En_sw
3.3Vsw
1.8Vsw
3.3Vsw
3.3Vperm
1.8Vsw
1.8Vperm
0.5Vmax
0.5Vmax
0.5Vmax
0.5Vmax
AC0060
14/20Doc ID 17716 Rev 1
L5958Electrical specifications
Figure 7.Reset and BU1 backup diagram
14 V
3.30 V
3.20 V
3.15 V
1.80 V
1.76 V
1.74 V
3 V
Figure 8.BU2 backup diagram
14 V
Vin1
REG5
REG6
CDELAY
RESET
Vin1
BU1
AC00598
t
t
t
t
t
BU2
3.30 V
1.80 V
REG3
REG4
AC00599
t
t
t
Figure 9.Maximum ESR for stability (valid for all the regulator outputs)
ESR
[Ω]
20
15
Maximum ESR
Minimum ESR
1001010.1100C [µF ]
AC00600
50mΩ
10
5
0
Stable region
Doc ID 17716 Rev 115/20
Electrical specificationsL5958
Figure 10. Current limit of the power switch
I
m
[A]
V
< 16V
cc
> 16V
1.5
3
V
cc
0
30t [ms]
16/20Doc ID 17716 Rev 1
L5958Package information
4 Package information
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK®
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK® is an ST trademark.
Figure 11. Flexiwatt27 (vertical) mechanical data and package dimensions
(*) Golden parameters
(**) – Dimension “F” doesn’t include dam-bar protrusion.
– Dimensions "H” and “L" incl ude mold flash or protrusions.
mminch
MIN.TYP.MAX.MIN.TYP.MAX.
OUTLINE AND
MECHANICAL DATA
Flexiwatt27
(SMD)
18/20Doc ID 17716 Rev 1
7993733 B
L5958Revision history
5 Revision history
Table 6.Document revision history
DateRevisionChanges
12-Jul-20101Initial release.
Doc ID 17716 Rev 119/20
L5958
Please Read Carefully:
Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the
right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any
time, without notice.
All ST products are sold pursuant to ST’s terms and conditions of sale.
Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no
liability whatsoever relating to the choice, selection or use of the ST products and services described herein.
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. If any part of this
document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products
or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoever of such
third party products or services or any intellectual property contained therein.
UNLESS OTHERWISE SET FORTH IN ST’S TERMS AND CONDITIONS OF SALE ST DISCLAIMS ANY EXPRESS OR IMPLIED
WARRANTY WITH RESPECT TO THE USE AND/OR SALE OF ST PRODUCTS INCLUDING WITHOUT LIMITATION IMPLIED
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS
OF ANY JURISDICTION), OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT.
UNLESS EXPRESSLY APPROVED IN WRITING BY AN AUTHORIZED ST REPRESENTATIVE, ST PRODUCTS ARE NOT
RECOMMENDED, AUTHORIZED OR WARRANTED FOR USE IN MILITARY, AIR CRAFT, SPACE, LIFE SAVING, OR LIFE SUSTAINING
APPLICATIONS, NOR IN PRODUCTS OR SYSTEMS WHERE FAILURE OR MALFUNCTION MAY RESULT IN PERSONAL INJURY,
DEATH, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE. ST PRODUCTS WHICH ARE NOT SPECIFIED AS "AUTOMOTIVE
GRADE" MAY ONLY BE USED IN AUTOMOTIVE APPLICATIONS AT USER’S OWN RISK.
Resale of ST products with provisions different from the statements and/or technical features set forth in this document shall immediately void
any warranty granted by ST for the ST product or service described herein and shall not create or extend in any manner whatsoever, any
liability of ST.
ST and the ST logo are trademarks or registered trademarks of ST in various countries.
Information in this document supersedes and replaces all information previously supplied.
The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners.