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Número de pieza | L5958 | |
Descripción | Multifunction voltage regulator | |
Fabricantes | STMicroelectronics | |
Logotipo | ||
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L5958
Multifunction voltage regulator for car radio
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
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.
Flexiwatt27
(vertical)
Flexiwatt27
(SMD)
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.
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.
Table 1.
Device summary
Order code
L5958
L5958SM
L5958SMTR
Package
Flexiwatt27 (vertical)
Flexiwatt27 (SMD)
Flexiwatt27 (SMD)
Packing
Tube
Tube
Tape and reel
July 2010
Doc ID 17716 Rev 1
1/20
www.st.com
1
1 page L5958
1 Block diagram
www.DataSheet4U.com
Block diagram
Figure 1. Block diagram
VIN1
EN_SW
EN_3P3P -1P8P
BU1
POWER
SWITCH
1.8V perm
REGULATOR
Vref
3.3V perm
REGULATOR
BU2
EN_3P3SW_1P8SW
1.8V
REGULATOR
V IN2
EN_8P5SW_5PSW
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
LOAD
DUMP
PRE
WARN
IGNOUT
CAN_PRETEMP
AUDIO_LOW_OUT
AUDIO_HIGH_OUT
AC00175
Doc ID 17716 Rev 1
5/20
5 Page L5958
www.DataSheet4U.com
Electrical specifications
Table 5. Electrical characteristics (continued)
Symbol
Parameter
Test condition
Min. Typ. Max. Unit
VDD_CORE_VAL buffer (open drain RESET for switched regulators)
RESreg3
Vhys_reg3
RES threshold voltage for reg3 Vreg3 = 3.3 V
Hysteresis of reset for reg3
-
RESreg4 RES threshold voltage for reg4 Vreg4 = 1.8 V
Vhys_reg4 Hysteresis of reset for reg4
-
Vol Low level
ISINK(RES) = 1 mA
Hold CAN signal (open drain for VIN1 battery warning 1)
3.00 3.15 3.25 V
10 50 100 mV
1.67 - 1.833 V
10 20 40 mV
-
0.3 0.5
V
Hold1_high Hold high threshold
-
VHYS
Hold1_low
Hysteresis high TH.
Hold low threshold
-
-
VHYS
Vol
VREF
Hysteresis low TH.
Low level
Reference voltage
-
ISINK(RES) = 1 mA
-
Hold audio signal (open drain for VIN1 battery warning 2)
17 - 20
150 400 600
5-6
200 400 600
- 0.3 0.5
- 1.2565 -
V
mV
V
mV
V
V
Hold2_high Hold high threshold
VHYS
Hold2_low
Hysteresis high TH.
Hold low threshold
VHYS
Vol
VREF
Hysteresis low TH.
Low level
Reference voltage
Ignition buffer (open drain)
-
-
-
-
ISINK(RES) = 1 mA
-
15.2 - 17.8
150 400 600
7.8 - 9.2
200 400 600
- 0.3 0.5
- 1.2565 -
V
mV
V
mV
V
V
IGNIN
Vhys(IGNout)
Vol
IGNRISE
IGNFALL
ICLAMP
IGNIN
IGNout falling
Hysteresis of ignition buffer
Low level
Rising time
Fall time
Input clamp current
Input voltage
-
-
ILsink (IGNout) = 1 mA
C = 15 pF
C = 15 pF
VCC < VIGN < 50 V
Operative
Enable input (regulators 1,2,3,4,5,6 and power switch)
1.03 1.17 1.28
30 50 100
- 0.3 0.5
- - 10
- - 10
- -2
0 - 50
V
mV
V
µs
µs
mA
V
VTH Voltage threshold
-
1.3 - 2.3 V
ENIN(reg1,2,3,4 Input voltage
power switch)
Operative
0 - 5V
ENIN(reg5,6) Input voltage
Operative
0 - 24 V
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
Doc ID 17716 Rev 1
11/20
11 Page |
Páginas | Total 20 Páginas | |
PDF Descargar | [ Datasheet L5958.PDF ] |
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