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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