L5950 [STMICROELECTRONICS]
MULTIPLE MULTIFUNCTION VOLTAGE REGULATOR FOR CAR RADIO; 汽车收音机的多功能多电压调节器
| 型号： | L5950 |
| 厂家： | 
ST |
| 描述： | MULTIPLE MULTIFUNCTION VOLTAGE REGULATOR FOR CAR RADIO |
| 文件： | 总8页 (文件大小：135K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
L5950
®
MULTIPLE MULTIFUNCTION
VOLTAGE REGULATOR FOR CAR RADIO
5 REGULATORS
10V (350mA); 8.5V (175mA); 5V (350mA); 5V
(250mA); 8V/10V (1A)
ALL REGULATORS ARE LOW DROPOUT
OUPUTS
3 HIGH SIDE DRIVERS:
2A (HSD1), 0.45A (HSD2 & HSD3)
NO EXTERNAL CHARGE PUMP CAPACI-
TORS ARE REQUIRED
Multiwatt15
STAND BY MODE CONTROLLED BY 3 IN-
PUT PINS:
DESCRIPTION
ENABLE FOR REG2 AND REG3,
I2C BUS FOR REG1, REG4, REG5, HSD1,
HSD2, HSD3
INDIVIDUAL THERMAL SHUTDOWN
INDEPENDENT CURRENT LIMITING
SHORT CIRCUIT PROTECTION
LOAD DUMP PROTECTION AND OVERVOL-
TAGE SHUTDOWN
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 I2C
bus and the Enable input.
External protection must be provided for reverse
battery protection.
ESD PROTECTED
BLOCK DIAGRAM
BAT
REG 1
REG1
GND
10V 350mA
VOLTAGE
REFERENCE
REG 2
REG2
8.5V 175mA
VREF
REG 3
REG3
5V 350mA
8.5 & 5V
ENABLE
ENABLE
REG 4
REG4
8V/10V 1A
SCL
PC OUTPUT
CONTROL
SDA
REG 5
REG5
5V 250mA
CURRENT
LIMIT
DRIVE 1
HSD1
2A
PROTECTION
LOGIC
INDIVIDUAL
THERMAL
DRIVE 2
HSD2
450mA
SHUTDOWN
OVERVOLTAGE
PROTECTION
DRIVE 3
HSD3
450mA
D99AU1002
March 2001
1/8
L5950
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
-0.6 to 26.5
34
Unit
V
VS
VS
DC Operating Supply Voltage
Transient Supply Overvoltages, rise time = 10ms
delay time = 115ms
V
Vin
Vout
Top
Tstg
Input Voltages (EN, SDA, SCL)
Output Control Voltage
-0.6 to 9
-0.6 to 6.0
-40 to 85
-40 to 150
V
V
Operating Temperature Range
Storage Temperature Range
C
C
°
°
PIN CONNECTION
15
14
13
12
11
10
9
REG4
BAT
REG5
REG3
REG2
REG1
VREF
GND
8
7
SCL
6
Enable
SDA
5
4
HSD3
HSD2
BAT
3
2
1
HSD1
D99AU1006
THERMAL DATA
Symbol
Parameter
Thermal Resistance Junction-case
Value
Unit
Rth j-case
2
°C/W
2/8
L5950
ELECTRICAL CHARACTERISTICS (Refer to the application circuit, VS = 14.4V; Tamb = 25°C; unless
otherwise specified.)
Symbol
Iq,ST-BY
Iq
Parameter
Test Condition
Min.
Typ.
Max.
2
Unit
Standby Quiescent Current
Maximum Quiescent Current
All Outputs Off, VBAT = 14V
VBAT = 14V, IREG1 = 350mA,
REG2 = 175mA, IREG3 = 350mA,
REG4 = 1A, IREG5 = 250mA,
HSD1 = 2A, IHSD2,3 = 450mA
A
µ
150
mA
I
I
I
IEN
Enable Input Current
VBAT = 14V,
Enable 2V
10
A
A
µ
µ
≥
VBAT = 14V,
-10
Enable 0.8V
≥
VIL, VIH
Enable Threshold Voltage
VBAT = 14V, VIL
VBAT = 14V, VIH
0.8
V
V
2
10V/350mA REG 1 OUTPUT
VREG1
Output Voltage
IREG1 = 350mA
9.50
10
10.5
55
V
11V
V
CC
16V
≤
≤
V
Line Regulation
11V
V
CC
26V
mV
∆
≤
≤
line
(Measure
Range)
VREG1 Across VCC
∆
V
∆
Load Regulation
5mA
I 350mA
≤
REG1
55
mV
≤
load
VDROPOUT
Dropout Voltage (Measure
(Measure VBAT- VREG1 when
REG1 drops 0.1V)
VBAT- VREG1 when VREG1 drops
V
0.1V)
I
I
REG1 = 350mA
REG1 = 5mA
900
300
mV
mV
Ilim1
Current Limit
0.51
50
1.1
A
SVR
Ripple Rejection
fo = 1kHz, VBAT = 14V
with 1Vpp AC
dB
IREG1 = 175mA
8.5V/175mA REG 2 OUTPUT
VREG2
Output Voltage
IREG2 = 175mA
8.3
8.5
8.7
50
V
9.5V
V
BAT
16V
≤
≤
V
Line Regulation
9.5V
V
BAT
26V
mV
∆
≤
≤
line
(Measure
Range)
VREG2 Across VBAT
∆
V
Load Regulation
Dropout Voltage
5mA
I
175mA
≤
REG2
50
mV
∆
≤
load
VDROPOUT
(Measure VBAT- VREG2 when
REG2 drops 0.1V)
IREG2 = 175mA
REG2 = 5mA
V
900
300
mV
mV
I
Ilim2
Current Limit
280
50
525
mA
dB
SVR
Ripple Rejection
fo = 1kHz, VBAT = 14V
with 1Vpp AC
IREG2 = 100mA
5V/350mA REG 3 OUTPUT
VREG3 Voltage Offset from VREF
10
40
40
mV
mV
V
Line Regulation
7V
V
BAT
26V
∆
≤
≤
line
(Measure
Range)
VREG3 Across VBAT
∆
V
∆
Load Regulation
5mA
I 350mA
≤
REG3
100
mV
≤
load
3/8
L5950
ELECTRICAL CHARACTERISTICS (continued)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
VDROPOUT
Dropout Voltage (Measure
VBAT- VREG3 when VREG3
drops 0.1V)
(Measure VBAT- VREG3 when
V
REG3 drops 0.1V)
I
I
REG3 = 175mA
REG3 = 5mA
950
600
mV
mV
Ilim3
Current Limit
0.5
50
1
A
SVR
Ripple Rejection
fo = 1kHz, VBAT = 14V
with 1Vpp AC
dB
IREG3 = 175mA
8/10V/1A REG 4 OUTPUT
VREG4
Output Voltage
IREG4 = 1A
b5 = 0
b5 = 1
7.6
9.50
8
10
8.4
10.5
V
V
V
∆
Line Regulation
11V
(Measure
Range)
V
26V, b5 = 1
≤
BAT
50
mV
≤
line
V
REG2
Across VBAT
∆
V
Load Regulation
Dropout Voltage
5mA ≤ IREG4 ≤ 1A
150
mV
∆
load
VDROPOUT
(Measure VBAT- VREG2 when
VREG2 drops 0.1V)
I
REG4 = 1A
950
600
mV
mV
IREG4 = 5mA
Ilim4
Current Limit
1.3
50
2.4
A
SVR
Ripple Rejection
fo = 1kHz, VBAT = 14V
with 1Vpp AC
dB
IREG4 = 500mA
5V/250mA REG 5 OUTPUT
VREG5
Output Voltage
Line Regulation
IREG5 = 250mA
4.75
5
5.25
40
V
V
7V
V
BAT
26V
V
mV
∆
≤
≤
∆
line
(Measure
Range)
Across VBAT
REG5
V
Load Regulation
Dropout Voltage
5mA ≤ IREG5 ≤250mA
100
mV
∆
load
VDROPOUT
(Measure VBAT- VREG5 when
V
REG5 drops 0.1V)
IREG5 = 250A
REG5 = 5mA
1.6
1.2
V
V
I
Ilim5
Current Limit
320
50
700
mA
dB
SVR
Ripple Rejection
fo = 1kHz, VBAT = 14V
with 1Vpp AC
IREG5 = 125mA
2A HSD1
Vsat
Output Saturation Voltage
IHSD1 = 1A
Continuous Time Operation
0.5
V
Ileak1
Ilim
Output Leakage Current
Current Limiting
All Driver Outputs are Off
-50
2.4
50
4
A
µ
RHSD1 = 0.5
A
Ω
0.45A HSD2 & HSD3
Vsat
Output Saturation Voltage
IHSD2,3 = 300mA
Continuous Time Operation
0.6
V
Ileak2,3
Ilim
Output Leakage Current
Current Limiting
All Driver Outputs are Off
-50
50
1
A
µ
RHSD2,3 = 0.5
0.56
A
Ω
4/8
L5950
ELECTRICAL CHARACTERISTICS (continued)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
CHARACTERISTICS FOR I2C
VIL
VIH
LOW Level Input Voltage
1.5
V
V
V
V
HIGH Level Input Voltage
Input Hysteresis
3
VHYS
VOL1
0.2
LOW Level Output
Sink Current = 3mA
Sink Current = 6mA
0.4
VOL2
II
0.6
10
V
Input Current
0.4V
V
I
0.9V
-10
A
µ
≤
≤
DDmax
fSCL
SCL Clock Frequency
400
kHz
while 10V is the output voltage when bit5 = ’1’.
When all outputs are turned off the total current
draw must be minimized. I2C will run at a clock
speed range of 100kHz to 400kHz. This device
should be capable of operating at any frequency
within this range.
FUNCTIONAL DESCRIPTION
The three high side drivers are a 2.0A output
(HSD1), and two 450mA outputs (HSD2 & 3). The
five regulator outputs are a 10V at 350mA
(REG1), an 8.5V at 175mA (REG2), a 5V at
350mA (REG3), an 8V/10V at 1A (REG4), and 5V
at 250mA (REG5). The regulators are low drop-
out. The regulators will operate with output ca-
pacitors with ESR of 0.1Ω to 5Ω.
The 8.5V regulator output (REG2) is a tighter tol-
erance output than the other regulator outputs.
The 8.5V output is a ±2.5% (5% total range) out-
put over temperature. This is required on the
regulator to improve performance and reduce
cost on the 8.5V driven IC’s in the radio. The
tighter tolerance is possible by performing a trim
of the bandgap reference to the 8.5V output. The
other outputs are ±5% variation over temperature.
Protection
The L5950 can survive under the following condi-
tions: shorting the outputs to BAT and GND, loss
of BAT, loss of IC GND, double battery(+26.5V),
4000V ESD, 34V load dump. L5950 will not han-
dle a reverse battery condition. External compo-
nents must be implemented for reverse battery
protection.
Thermal Shutdown: REG1, REG2, REG3, REG4,
REG5 outputs shutdown at 160°C and return to
normal operation at 130°C. The HSD2 and HSD3
shutdown at 160°C and return to normal opera-
tion at 130°C. The HSD1 with go into thermal
shutdown at 170°C and returns to operation at
120°C.
REG3 is referenced from the VREF input not the
internal bandgap. This is done to minimize the
voltage offset between individual 5V supplies.
Current Limiting: each voltage regulator will con-
tain its own current protection.
Short Circuit: If the outputs are short circuited, the
IC will go into current limiting and eventually the
thermal shutdown will kick in. Current limiting will
not disable the outputs.
The REG2 and REG3 outputs are turned on and
off with the Enable input, a ’1’ turns the outputs on
and a ’0’ turns them off. When Enable is "1", the
other outputs can be independently controlled via
the I2C bus. When a given regulator is turned off it
must be guaranteed to be lower than 0.2V. The
output voltage of REG4 is selected via bit 5 of the
I2C data byte: 8V is the output voltage if bit5 = ’0’
Overvoltage: The IC will not operate if the BAT
voltage reaches 27V typ. or above.
Figure 1. Definition of Timing on the I2C Bus.
SDA
t
BUP
t
t
t
t
SP
R
F
HD;STA
t
LOW
SCL
t
t
t
t
t
t
SU;STO
HD;DAT
HD;DAT
HIGH
SU;DAT
SU;STA
P
S
Sr
D99AU1007
P
5/8
L5950
Figure 2. Typical Application Circuit.
REG1
EN
ENABLE
BAT
REG1
REG2
REG3
REG4
REG5
FBATT
REG2
REG3
VREF
C6
10µF
0.1µF
1000µF
VREF
C8
10µF
REG4
C10
10µF
REG5
C12
10µF
C14
10µF
SCL
SDA
GND
HSD1
HSD2
HSD3
HSD1
HSD2
HSD3
D99AU1010A
(*) ESR of output capacitors should be between 0.1Ω and 5.0Ω.
WRITE MODE:
CHIP ADDRESS
DATA BYTE
S
0
A
A
..
..
P
MSB
LSB
MSB
LSB
S = START condition - SDA goes from high to low while SCL is high
A = Acknowledge - the device being written to, pulls down on data line (SDA) during the acknowledge
clock pulse.
P = STOP condition - SDA goes from low to high while SCL is high.
CHIP ADDRESS BYTE:
CHIP ADDRESS
READ/WRITE
A7
0
A6
0
A5
0
A4
1
A3
0
A2
0
A1
0
A0
0
DATA BYTE:
DATA BYTE
REG1
b7
R4 10V
b5
REG4
b4
REG5
b3
HSD1
b2
HSD2
b1
HSD3
b0
b6
X
Default mode is 0000 0000 which corresponds to all outputs being off, low power mode.
Bit 5 Controls the output voltage of REG4. A ’0’ corresponds to 8V and a ’1’ corresponds to 10V.
6/8
L5950
mm
inch
DIM.
OUTLINE AND
MIN. TYP. MAX. MIN. TYP. MAX.
MECHANICAL DATA
A
B
5
0.197
0.104
0.063
2.65
1.6
C
D
1
0.039
E
0.49
0.66
1.02
0.55 0.019
0.75 0.026
0.022
0.030
F
G
1.27
1.52 0.040 0.050 0.060
G1
H1
H2
L
17.53 17.78 18.03 0.690 0.700 0.710
19.6
0.772
20.2
0.795
21.9
21.7
22.2
22.1
22.5 0.862 0.874 0.886
22.5 0.854 0.870 0.886
L1
L2
L3
L4
L7
M
17.65
18.1 0.695
0.713
17.25 17.5 17.75 0.679 0.689 0.699
10.3
2.65
4.25
4.63
1.9
10.7
10.9 0.406 0.421 0.429
2.9 0.104 0.114
4.55
5.08
4.85 0.167 0.179 0.191
5.53 0.182 0.200 0.218
M1
S
2.6
2.6
0.075
0.075
0.102
0.102
0.152
S1
Dia1
1.9
Multiwatt15 V
3.65
3.85 0.144
7/8
L5950
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences
of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is
granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are
subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products
are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.
The ST logo is a registered trademark of STMicroelectronics
© 2001 STMicroelectronics – Printed in Italy – All Rights Reserved
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8/8
相关型号：
L5951
TRIPLE OUTPUT MULTIFUNCTION VOLTAGE REGULATOR FOR CAR RADIO WITH IDR/CLASS 2 INTERFACE
STMICROELECTR
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