SGS Thomson Microelectronics L5950 Datasheet
®
VOLTAGE REG ULAT O R FOR CA R RA DI O
5 REGULATORS
10V (350mA); 8.5V (175mA); 5V (350mA); 5V
(250mA); 8V/10V (1A)
ALL REGULATORS ARE LOW DROPOUT
OUPUTS
3 HIGH SIDE DRIVER S:
2A (HSD1), 0.45A (HSD2 & HSD3)
NO EXTERNAL CHARGE PUMP CAPACITORS ARE REQUIRED
STAND BY MODE CONTROLLED BY 3 INPUT PIN S:
ENABLE FOR REG2 AND REG 3,
2
I
C BUS FOR REG1, REG4, REG5, HSD1,
HSD2, HSD3
INDIVIDUAL THERM AL SHUT DOW N
INDEPENDENT CURRENT LIMITING
SHORT CIRCUIT PROTECTION
LOAD DUMP PROTECTION AND OVERVOL-
TAGE SHUTDOWN
ESD PROTECTED
L5950
MULTIPLE MULTIFUNCTION
Multiwatt15
DESCRIPTION
The ASPM (Audio System Power Module) is an
integration of three high side drivers and five
regulators developed to provide the power for an
audio system.
The outputs of the IC are controlled via the I
bus and the Enable input.
External protection must be provided for reverse
battery protection.
2
C
BLOCK DIAGRAM
BAT
GND
VREF
ENABLE
SCL
SDA
VOLTAGE
REFERENCE
8.5 & 5V
ENABLE
PC OUTPUT
CONTROL
CURRENT
LIMIT
PROTECTION
LOGIC
INDIVIDUAL
THERMAL
SHUTDOWN
OVERVOLTAGE
PROTECTION
REG 1
10V 350mA
REG 2
8.5V 175mA
REG 3
5V 350mA
REG 4
8V/10V 1A
REG 5
5V 250mA
DRIVE 1
2A
DRIVE 2
450mA
DRIVE 3
450mA
REG1
REG2
REG3
REG4
REG5
HSD1
HSD2
HSD3
D99AU1002
March 2001
1/8
L5950
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
S
V
S
V
in
V
out
T
op
T
stg
PIN CONNECTION
DC Operating Supply Voltage -0.6 to 26.5 V
Transient Supply Overvoltages, rise time = 10ms
34 V
delay time = 115ms
Input Voltages (EN, SDA, SCL) -0.6 to 9 V
Output Control Voltage -0.6 to 6.0 V
Operating Temperature Range -40 to 85
Storage Temperature Range -40 to 150
C
°
C
°
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
REG4
BAT
REG5
REG3
REG2
REG1
VREF
GND
SCL
Enable
SDA
HSD3
HSD2
BAT
HSD1
D99AU1006
THERMAL D AT A
Symbol Parameter Value Unit
Rth j-case Thermal Resistance Junction-case 2 °C/W
2/8
L5950
ELECTRICAL CHARACTERISTICS
(Refer to the application circuit, V
= 14.4V; T
S
= 25°C; unless
amb
otherwise specified.)
Symbol Parameter Test Condition Min. Typ. Max. Unit
I
q,ST-BY
I
q
I
EN
, V
V
IL
10V/350mA REG 1 OUTPUT
V
REG1
V
∆
line
V
∆
load
V
DROPOUT
I
lim1
SVR Ripple Rejection f
8.5V/175mA REG 2 OUTPUT
V
REG2
V
∆
line
V
∆
load
V
DROPOUT
I
lim2
SVR Ripple Rejection f
5V/350mA REG 3 OUTPUT
V
REG3
V
∆
line
V
∆
load
Standby Quiescent Current All Outputs Off, V
Maximum Quiescent Current V
Enable Input Current V
BAT
I
REG2
I
REG4
I
HSD1
BAT
= 14V, I
= 175mA, I
= 1A, I
REG5
= 2A, I
HSD2,3
= 14V,
= 14V 2
BAT
= 350mA,
REG1
REG3
= 350mA,
= 250mA,
= 450mA
Enable ≥ 2V
V
BAT
= 14V,
-10
Enable ≥ 0.8V
Enable Threshold Voltage V
IH
Output Voltage I
= 14V, V
BAT
V
= 14V, V
BAT
= 350mA
REG1
11V ≤ V
CC
IL
IH
≤ 16V
2
9.50 10 10.5 V
Line Regulation 11V ≤ VCC ≤ 26V
(Measure ∆ V
REG1
Across V
CC
Range)
Load Regulation 5mA ≤ I
Dropout Voltage (Measure
V
- V
REG1
when V
REG1
BAT
0.1V)
drops
(Measure V
V
REG1
I
REG1
I
REG1
≤ 350mA 55 mV
REG1
- V
REG1
when
BAT
drops 0.1V)
= 350mA
= 5mA
Current Limit 0.51 1.1 A
= 1kHz, V
o
BAT
= 14V
50 dB
with 1Vpp AC
I
= 175mA
REG1
Output Voltage I
Line Regulation 9.5V ≤ V
= 175mA
REG2
9.5V ≤ V
BAT
BAT
(Measure ∆ V
≤ 16V
≤ 26V
REG2
Across V
8.3 8.5 8.7 V
BAT
Range)
Load Regulation 5mA ≤ I
Dropout Voltage (Measure VBAT- V
V
REG2
I
REG2
I
REG2
≤ 175mA 50 mV
REG2
when
REG2
drops 0.1V)
= 175mA
= 5mA
Current Limit 280 525 mA
= 1kHz, V
o
BAT
= 14V
50 dB
with 1Vpp AC
I
= 100mA
REG2
Voltage Offset from VREF 10 40 mV
Line Regulation 7V ≤ V
(Measure ∆ V
BAT
≤ 26V
REG3
Across V
BAT
Range)
Load Regulation 5mA ≤ I
≤ 350mA 100 mV
REG3
150 mA
10
0.8 V
55 mV
900
300
50 mV
900
300
40 mV
µ
µ
µ
V
mV
mV
mV
mV
A
A
A
3/8
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