STMICROELECTRONICS L5957

L5957
Multifunction voltage regulator for car radio
Features
■
Four outputs:
– 8.5 V @ 500 mA
– 5 V @ 300 mA Permanent
– 5 V @ 800 mA
– 3.3 V @ 800 mA
■
2 A high side driver
■
Reset function
■
Ignition comparator
■
Load dump protection
■
Thermal shutdown
■
Overcurrent limitation
■
All pins ESD protected
Multiwatt15 (Vertical)
PowerSO20 (Slug up)
The IC includes a monitoring circuit for detection.
Description
The L5957 contains a triple voltage regulator and
a power switch.
Table 1.
The IC features a very low quiescent current in
standby.
Device summary
Order code
Package
Packing
L5957PD
PowerSO20 (slug up)
Tube
L5957PDTR
PowerSO20 (slug up)
Tape and reel
L5957
Multiwatt15 (Vertical)
Tube
January 2010
Doc ID 14442 Rev 2
1/16
www.st.com
1
Contents
L5957
Contents
1
Block and pins connection diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2
Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.1
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.2
Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.3
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2/16
Doc ID 14442 Rev 2
L5957
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
Doc ID 14442 Rev 2
3/16
List of figures
L5957
List of figures
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Figure 11.
Figure 12.
4/16
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Pins connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Typical application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Maximum ESR for stability valid for all the regulators outputs . . . . . . . . . . . . . . . . . . . . . . 10
Timing diagram of regulators and power switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Backup and reset diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Hold and thermal protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Ignition buffer diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Protection of the power switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Short circuit diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
PowerSO20 (slug up) mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . 13
Multiwatt15 (vertical) mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . 14
Doc ID 14442 Rev 2
L5957
1
Block and pins connection diagrams
Block and pins connection diagrams
Figure 1.
Block diagram
POWER
SWITCH
VINI (MAIN)
SW
EN_SW
REG1
REG 1(8.5V)
REG2
REG 2(PERM)(5V)
REG3
REG 3(5V)
REG4
REG 4(3.3V)
BU
VIN2
ENREG3(5V)
ENREG1-4(8.5V, 3.3V)
HOLD
THERMAL
PROTECTION
DUMP LOAD
PROTECTION
RESET
BUFFER
CRES
IGNITION
BUFFER
IGNIN
D02AU1342/L5957
IGNOUT
Figure 2.
RES
Pins connection
VIN2
20
1
REG4(3.3V)
REG3(5V)
19
2
IGNIN
N.C.
18
3
IGNOUT
REG1(8.5V)
17
4
RES
SW
16
5
CRES
N.C.
15
6
ENREG1-4(8.5V, 3.3V)
VIN1
14
7
ENREG3(5V)
BU
13
8
EN_SW
REG2(5V)
12
9
HOLD
HEATSINK
11
10
GND
PowerSO
D02AU1343 /L5957
15
VIN2
14
REG3
13
REG1
12
SWITCH
11
BU
10
REG2
9
VIN1
8
GND
7
HOLD
6
EN SW
5
ENREG1, 4
4
ENREG3
3
CRES
2
RES
1
REG4
Multiwatt
D03AU1513/L5957
Doc ID 14442 Rev 2
5/16
Electrical specifications
L5957
2
Electrical specifications
2.1
Absolute maximum ratings
Table 2.
Absolute maximum ratings
Symbol
2.2
Parameter
Value
Unit
VSDC
DC operating supply voltage
30
V
VSTR
Transient supply voltage
50
V
IO
Output current
internally limited
Top
Operating temperature range
-40 to 85
°C
Tstg
Storage temperature
-55 to 150
°C
Tj
Junction temperature
-55 to 150
°C
Pd
Power dissipation Tcase = 85 °C
43
W
PowerSO Multiwatt
Unit
Thermal data
Table 3.
Thermal data
Symbol
Rth j-case
2.3
Parameter
Thermal resistance junction-to-case
Max.
1.5
1.8
°C/W
Electrical characteristics
VS = 14.4 V; Tamb = 25 °C; unless otherwise specified.
Table 4.
Electrical characteristics
Symbol
Parameter
Test condition
Min.
Typ.
Max.
Unit
Input supplies
Vin1
Input supply voltage 1
Operating
9
-
18
V
Vin2
Input supply voltage 2
Operating
6
-
18
V
Standby (-20 °C to 85 °C)
IGNIN = 5 V
-
-
70
μA
REGx = 5 V, REGsw = 5 V,
IGNIN = 5 V
-
5
-
mA
Standby (-20 °C to 85 °C)
IGNIN = 5 V, VCC = 18 V
-
100
-
µA
Vin1
18
20
22
V
Vin2
18
20
22
V
Iq
Load Dump
Vin1
Load Dump
Vin2
6/16
Total quiescent current
Battery over voltage
Doc ID 14442 Rev 2
L5957
Electrical specifications
Table 4.
Symbol
Electrical characteristics (continued)
Parameter
Test condition
Min.
Typ.
Max.
Unit
-
8
8.5
9
V
Vin1 = 10 to 18 V; I = 500 mA
-
-
50
mV
Vin1 = 9.3 to 18 V; I = 10 mA
-
-
50
mV
Load regulation
Ireg1 = 1 to 500 mA
-
-
100
mV
Quiescent current
Ireg1 = 10 mA
-
-
5
mA
PSRR
Supply voltage ripple rejection
f = 1 kHz; Vin1 = 1.5 Vpp;
Io = 500 mA
50
-
-
dB
Vdrop
Drop out voltage
Ireg1 = 500 mA (1)
-
-
0.6
V
Current limit
Rshort = 0.5 Ω
0.6
-
1.2
A
Output voltage 5 V
-
4.7
5
5.3
V
Vin1 = 7 to 18 V; I = 300 mA
-
-
50
mV
Vin1 = 6 to 18 V; I = 10 mA
-
-
50
mV
Load regulation
Ireg2 = 1 to 300 mA
-
-
100
mV
Quiescent Current
Ireg2 = 10 mA
-
-
3
mA
PSRR
Supply voltage ripple rejection
f = 1 kHz; Vin1 = 1.5 Vpp;
Io = 300 mA
50
-
-
dB
-
1.5
V
Drop out voltage
Ireg2 = 300 mA (1)
-
Vdrop
(1)
-
-
0.6
V
Regulator 1
Vo (REG 1)
ΔV
ΔVi
Iq
Im
Output voltage 8.5 V
Line regulation
Regulator 2
Vo (ST BY)
ΔV
ΔVi
Iq
Line regulation
Ireg2 = 100 mA
Current limit
Rshort = 0.5 Ω
400
-
800
mA
Output voltage 5V
-
4.75
5
5.25
V
Vin2 = 7 to 18 V; I = 800 mA
-
-
50
mV
Vin2 = 6 to 18 V; I = 10 mA
-
-
50
mV
Load regulation
Ireg3 = 1 to 800 mA
-
-
100
mV
Quiescent current
Ireg3 = 10 mA
-
-
5
mA
PSRR
Supply voltage ripple rejection
f = 1 kHz; Vin1 = 1.5 Vpp;
Io = 800 mA
50
-
-
dB
Vdrop
Drop out voltage
Ireg3 = 800 mA (1)
-
-
1.5
V
Current limit
Rshort = 0.5 Ω
1
-
2
A
Output voltage 3.3V
-
3.10
3.3
3.50
V
ΔV
Line regulation
Vin2 = 6 to 18 V; I = 800 mA
-
-
50
mV
ΔV
Line regulation
Vin2 = 6 to 18 V; I = 10 mA
-
-
50
mV
Im
Regulator 3
Vo (REG 3)
ΔV
ΔVi
Iq
Im
Line regulation
Regulator 4
Vo (REG 4)
Doc ID 14442 Rev 2
7/16
Electrical specifications
Table 4.
L5957
Electrical characteristics (continued)
Symbol
ΔVi
Parameter
Test condition
Min.
Typ.
Max.
Unit
Load regulation
Ireg4 = 1 to 800 mA
-
-
100
mV
Quiescent current
Ireg4 = 10 mA
-
-
5
mA
PSRR
Supply voltage ripple rejection
f = 1 kHz; Vin1 = 1.5 Vpp;
Io = 800 mA
48
-
-
dB
Vdrop
Drop out voltage
Ireg4 = 800 mA (1)
-
-
2.65
V
Current limit
Rshort = 0.5 Ω
0.9
-
2
A
Drop voltage power switch
IdcSW = 1.8 A max.
-
-
0.5
V
Peak time < 10 ms
2
-
3.5
A
Peak time > 40 ms
1
-
2
A
-
15
-
45
ms
Iq
Im
Power switch
VdropSW
IpSW1
Peak current power switch
IpSW2
SWDEL
Delay Protection
Reset buffer (with push-pull buffer)
RES
RES falling
Vreg2 = 5 V
4.6
4.7
4.8
V
RES
RES rising
Vreg2 = 5 V
4.65
4.8
4.95
V
VHYS(RES)
Hysteresis of reset buffer
-
50
-
200
mV
IHsource (RES)
High level source current
Reset = 0 V
1000
1300
1600
μA
ILsink (RES)
Low level sink current
Reset = 5 V
14
16
18
mA
RES delay
Cres = 47nF
-
10
-
60
ms
Reset rise and fall time
R = 10 kΩ
-
-
50
μs
Charge current
CRES = 0 V
3
5
10
μA
IDischarge
Discharge current
CRES = 5 V
1
-
3
mA
VTH(F)
Falling voltage threshold
-
1
1.2
1.4
V
VTH(R)
Rising voltage threshold
-
2.5
2.8
3.5
V
Vol
Low level
ISINK(RES) = 1 mA
0.3
0.5
V
Voh
High level
-
4.5
Vreg2
5.5
V
VlowI
Hold output low for Vin1 low
Low detection
-
-
9
V
Vlowh
Hold output high for Vin1
normal
Normal high detection
10
-
18
V
Vlowl
Hold output low for Vin1 high
low detection
22
-
-
V
Low VIN1 threshold
VIN1 Low TH.
9
9.5
10
V
-
50
150
200
mV
VIN1 High TH.
18
20
22
V
-
50
150
250
mV
ΔTRES
ICharge
C = 15 pF
Hold signal
VHOLD R
VHYS (HOLD_L) Hysteresis low TH.
VHOLD F
High VIN1 threshold
VHYS (HOLD_M) Hysteresis high TH.
8/16
Doc ID 14442 Rev 2
L5957
Table 4.
Electrical specifications
Electrical characteristics (continued)
Symbol
Parameter
Test condition
Min.
Typ.
Max.
Unit
Ignition buffer (push-pull with schmitt trigger)
IGNIN
IGNout falling
-
1.03
1.17
1.28
V
IGNIN
IGNout rising
-
1.18
1.27
1.33
V
Hysteresis of ignition buffer
-
30
50
100
mV
IGNout = 0 V
1000
1500
2000
μA
Low level sink current
IGNout = 5 V
10
15
20
mA
Vol
Low level
ILsink (IGNout) = 1 mA
-
0.3
0.5
V
Voh
High level
-
4.5
Vreg2
5.5
V
IGNRISE
Rising time
C = 15 pF
-
-
10
μs
IGNFALL
Fall time
C = 15 pF
-
-
10
μs
ICLAMP
Input clamp current
VCC < VIGN < 50 V
-
-
2
mA
IGNIN
Input voltage
Operative
0
-
50
V
1.3
-
2.3
V
0
-
5
V
Vhys(IGNout)
IHsource(IGNout) High level source current
ILsink(IGNout)
Enable input (regulators 1,3,4 and power switch)
VTH
Voltage threshold
-
ENIN
Input voltage
Operative
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.
Figure 3.
Typical application circuit
Vs
VIN1
SW
POWER
SWITCH
EN SW
22 µF
470 µF
REG 1
REG1
100 nF
Cfilt (*)
REG 2
470 µF
REG2
BU
Cfilt (*)
REG 3
VIN2
REG3
ENREG3
REG 4
10 KΩ
Cfilt (*)
REG4
ENREG1-4
Cfilt (*)
HOLD
to µProcessor
THERMAL
PROTECTION
10 KΩ
K
IGNIN
DUMP LOAD
PROTECTION
RES
RESET
BUFFER
CRES
IGNITION
BUFFER
to µProcessor
47 nF
1 nF
IGNOUT
AC00427
(*) Recommended output filtering capacitors for all the regulators: C range = 5 µF to 100 µF, ESR range = 0.5 Ω to 10 Ω (T= -40 ˚C to +85 ˚C)
Doc ID 14442 Rev 2
9/16
Electrical specifications
Figure 4.
L5957
Maximum ESR for stability valid for all the regulators outputs
ESR
[Ω]
Maximum ESR
10
5
Stable region
1
Minimum ESR
0.5
5
10
100
C [µF]
AC00591
Figure 5.
Timing diagram of regulators and power switch
DUMP
VM
VIN1=VIN2
9V
8.5V
REG1(8.5V)
3.3V
REG4(3.3V)
ENREG1-4
5V
REG3(5V)
ENREG3
5V
REG2(5V)
VM
POWER SWITCH
9V
EN-SW
D02AU1420A
18V ≤ VM ≤ 22V
10/16
Doc ID 14442 Rev 2
L5957
Electrical specifications
Figure 6.
Backup and reset diagram
14
5
4.8
4.7
VBATT
BACKUP CAP.
5V PERM
t
5
3
CDELAY
t
RESET
D02AU1422
Figure 7.
t
Hold and thermal protection
DUMP
9V
22
8.5V
5V
18
VIN1
HOLD
3.3V
9.5
5
ON
T≅160
TEMPERATURE
PROTECTION
8.5V
REG1(8.5V)
5V
REG2(5V)
5V
REG3(5V)
3.3V
REG4(3.3V)
ENREG3
5V
ENREG1-4
D02AU1423B
Doc ID 14442 Rev 2
11/16
Electrical specifications
Figure 8.
L5957
Ignition buffer diagram
50V
IGNITION
INPUT
1.27V
1.17V
IGNITION
OUTPUT
LOAD DUMP
14V
VIN1
D02AU1424
Figure 9.
Protection of the power switch
VSW
16V
DELAYED
NOT
DELAYED
1.5A
3A
IN CASE
VIN1 <16V
D02AU1425
ISW
Figure 10. Short circuit diagram
SHORT TO GND
REG1
SHORT TO GND
REG2
SHORT TO GND
REG3
SHORT TO GND
REG4
SHORT TO GND
SWITCH
12/16
Doc ID 14442 Rev 2
L5957
3
Package information
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. PowerSO20 (slug up) mechanical data and package dimensions
DIM.
A
A2
A4
A5
a1
b
c
D (1)
D1
D2
E
E1 (1)
E2
E3
e
e3
G
H
h
L
N
R
S
V
mm
TYP.
MIN.
3.25
3
0.8
0.15
0.030
0.4
0.23
15.8
9.4
3.15
0.2
MAX.
3.5
3.3
1
0.25
-0.040
0.53
0.32
16
9.8
MIN.
0.128
0.118
0.031
0.006
0.0012
0.016
0.009
0.622
0.370
14.5
11.1
2.9
6.2
1.42
0.547
0.429
inch
TYP.
0.124
0.008
1
13.9
10.9
5.8
1.12
1.27
11.43
0
15.5
OUTLINE AND
MECHANICAL DATA
0.039
0.228
0.044
0.050
0.450
0.1
0
15.9
0.61
1.1
1.1
0.031
10¡ (max)
0.8
MAX.
0.138
0.130
0.039
0.010
-0.0016
0.021
0.012
0.630
0.385
0.570
0.437
0.114
0.244
0.056
0.004
0.625
0.043
0.043
0.6
0.024
0¡ (min.) 8¡ (max.)
5¡ (min.) 7¡ (max.)
PowerSO20 (SLUG UP)
(1) ÒD and E1Ódo not include mold flash or protusions.
- Mold flash or protusions shall not exceed 0.15mm (0.006Ó)
- Critical dimensions: ÒEÓ,Òa1Ó,ÒeÓ
and ÒGÓ.
N
H
N
E3
A2
b
R
A4
A5
A
c
V
e
D2 (x2) DETAIL A
e3
E2
E
M
h x 45û
1
10
DETAIL A
E2
0.35
E1
Gage Plane
a1
S
L
-CSEATING PLANE
G
20
D1
C
(COPLANARITY)
11
PSO20DME
D
0088529 C
Doc ID 14442 Rev 2
13/16
Package information
L5957
Figure 12. Multiwatt15 (vertical) mechanical data and package dimensions
DIM.
mm
MIN.
TYP.
inch
MAX.
MIN.
TYP.
A5
MAX.
0.197
B
2.65
C
1.6
D
OUTLINE AND
MECHANICAL DATA
0.104
0.063
1
0.039
E
0.49
0.55
0.019
F
0.66
0.75
0.026
0.022
G
1.02
1.27
1.52
0.040
0.050
0.060
G1
17.53
17.78
18.03
0.690
0.700
0.710
H1
19.6
0.030
0.772
H2
20.2
0.795
L
21.9
22.2
22.5
0.862
0.874
0.886
L1
21.7
22.1
22.5
0.854
0.87
0.886
L2
17.65
18.1
0.695
L3
17.25
17.5
17.75
0.679
0.689
L4
10.3
10.7
10.9
0.406
0.421
L7
2.65
2.9
0.104
0.713
0.699
0.429
0.114
M
4.25
4.55
4.85
0.167
0.179
0.191
M1
4.73
5.08
5.43
0.186
0.200
0.214
S
1.9
2.6
0.075
0.102
S1
1.9
2.6
0.075
0.102
Dia1
3.65
3.85
0.144
0.152
Multiwatt15 (ver tical)
0016036 J
14/16
Doc ID 14442 Rev 2
L5957
4
Revision history
Revision history
Table 5.
Document revision history
Date
Revision
Changes
11-Feb-2008
1
Initial release.
08-Jan-2010
2
Updated Section 1: Block and pins connection diagrams on page 5.
Updated Figure 3, 5 and 6.
Doc ID 14442 Rev 2
15/16
L5957
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