Datasheet L5950 Datasheet (SGS Thomson Microelectronics)

®

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

L5950

ELECTRICAL CHARACTERI S TICS

(continued)

Symbol Parameter Test Condition Min. Typ. Max. Unit

V

DROPOUT

I

lim3

SVR Ripple Rejection f

Dropout Voltage (Measure
VBAT- V

REG3

when V

REG3

drops 0.1V)

(Measure VBAT- V
V

drops 0.1V)

REG3

I

= 175mA

REG3

I

= 5mA

REG3

REG3

when

950
600

Current Limit 0.5 1 A

= 1kHz, V

o

BAT

= 14V

50 dB
with 1Vpp AC
I

= 175mA

REG3

8/10V/1A REG 4 OUTPUT

V

∆

REG4

V

line

Output Voltage I

REG4

= 1A
b5 = 0
b5 = 1

Line Regulation 11V ≤ V

(Measure ∆ V

≤ 26V, b5 = 1

BAT

REG2

Across V

BAT

7.6

9.50

10

8

8.4

10.5
50 mV

Range)

V

∆

V

DROPOUT

I

lim4

load

Load Regulation 5mA ≤ I
Dropout Voltage (Measure VBAT- V

Current Limit 1.3 2.4 A

SVR Ripple Rejection f

V

REG2

I

REG4

I

REG4

= 1kHz, V

o

≤ 1A 150 mV

REG4

when

REG2

drops 0.1V)
= 1A
= 5mA

BAT

= 14V

50 dB

950
600

with 1Vpp AC
I

= 500mA

REG4

5V/250mA REG 5 OUTPUT

V

∆

REG5

V

line

Output Voltage I

REG5

Line Regulation 7V ≤ V

(Measure ∆ V

= 250mA 4.75 5 5.25 V

BAT

≤ 26V

REG5

Across V

BAT

40 mV

Range)

V

∆

V

DROPOUT

I

lim5

load

Load Regulation 5mA ≤ I
Dropout Voltage (Measure VBAT- V

Current Limit 320 700 mA

SVR Ripple Rejection f

V

REG5

I

REG5

I

REG5

= 1kHz, V

o

≤250mA 100 mV

REG5

when

REG5

drops 0.1V)
= 250A
= 5mA

BAT

= 14V

50 dB

1.6

1.2

with 1Vpp AC
I

= 125mA

REG5

2A HSD1

V

sat

Output Saturation Voltage IHSD1 = 1A

0.5 V

Continuous Time Operation

I

leak1

I

lim

Output Leakage Current All Driver Outputs are Off -50 50
Current Limiting R

HSD1

= 0.5

Ω

2.4 4 A

0.45A HSD2 & HSD3

V

sat

Output Saturation Voltage IHSD2,3 = 300mA

0.6 V

Continuous Time Operation

I

leak2,3

I

lim

Output Leakage Current All Driver Outputs are Off -50 50
Current Limiting R

HSD2,3

= 0.5

Ω

0.56 1 A

mV
mV

V
V

mV
mV

V
V

µ

µ

A

A

4/8

L5950

ELECTRICAL CHARACTERI S TICS

(continued)

Symbol Parameter Test Condition Min. Typ. Max. Unit

2

CHARACTERISTICS FOR I

V

IL

V

IH

V

HYS

V

OL1

V

OL2

I

I

f

SCL

LOW Level Input Voltage 1.5 V
HIGH Level Input Voltage 3 V
Input Hysteresis 0.2 V
LOW Level Output Sink Current = 3mA

Input Current 0.4V ≤ VI ≤ 0.9V
SCL Clock Frequency 400 kHz

FUNCTIONAL DESCRIP TION

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 drop­out. The regulators will operate with output ca­pacitors with ESR of 0.1Ω to 5Ω.

The 8.5V regulator output (REG2) is a tighter tol­erance output than the other regulator outputs.
The 8.5V output is a ±2.5% (5% total range) out­put 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.

C

0.4

Sink Current = 6mA

DDmax

-10 10

0.6

while 10V is the output voltage when bit5 = ’1’.
When all outputs are turned off the total current
draw must be minimized. I

2

C will run at a clock
speed range of 100kHz to 400kHz. This device
should be capable of operating at any frequency
within this range.

Protection

The L5950 can survive under the following condi­tions: 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 han­dle a reverse battery condition. External compo­nents 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 opera­tion at 130°C. The HSD1 with go into thermal

REG3 is referenced from the VREF input not the
internal bandgap. This is done to minimize the
voltage offset between individual 5V supplies.

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

2

C bus. When a given regulator is turned off it

the I
must be guaranteed to be lower than 0.2V. The
output voltage of REG4 is selected via bit 5 of the

2

C data byte: 8V is the output voltage if bit5 = ’0’

I

shutdown at 170°C and returns to operation at
120°C.

Current Limiting: each voltage regulator will con­tain 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.

Overvoltage: The IC will not operate if the BAT
voltage reaches 27V typ. or above.

V
V

A

µ

Figure 1. Definition of Timing on the I2C Bus.

SDA

t

BUP

SCL

PS P

t

HD;DAT

t

LOW

t

HD;DAT

t

R

t

HIGH

t

F

t

SU;DAT

t

SU;STA

t

HD;STA

Sr

D99AU1007

t

SP

t

SU;STO

5/8

L5950

Figure 2. Typical Application Circuit.

EN

FBATT

1000µF0.1µF

(*) ESR of output capacitors should be between 0.1Ω and 5.0Ω.

VREF

ENABLE

BAT

VREF

SCL

SDA

GND

REG1

REG2

REG3

REG4

REG5

HSD1
HSD2
HSD3

REG5

C14

10µF

REG4

C12

10µF

HSD1
HSD2
HSD3

D99AU1010A

REG3

C10

10µF

REG2

C8

10µF

REG1

C6

10µF

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 A6 A5 A4 A3 A2 A1 A0

00010000

DATA BYTE:

DATA BYTE

REG1 R4 10V REG4 REG5 HSD1 HSD2 HSD3

b7 b6 b5 b4 b3 b2 b1 b0

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

DIM.

MIN. TYP. MAX. MIN. TYP. MAX.

A 5 0.197
B 2.65 0.104
C 1.6 0.063
D 1 0.039
E 0.49 0.55 0 .019 0.022

F 0.66 0.75 0.026 0.030

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 0.772
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 0.870 0.886
L2 17.65 18.1 0.695 0.713
L3 17.25 17.5 1 7.75 0.679 0.689 0.699
L4 10.3 10.7 10.9 0 .406 0.421 0.429
L7 2.65 2.9 0.104 0.114
M 4.25 4.55 4.85 0.167 0.179 0.191

M1 4.63 5.08 5.53 0.182 0.200 0.218

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

mm inch

OUTLINE AND

MECHANICAL DATA

Multiwatt15 V

7/8

L5950

Information furnished is believed to be accurate and r el i abl e. H owever, STMicroelec tronics assumes no responsibility for the consequences
of use of such informatio n nor for any infringement of patents or other ri ghts of third parties which may res ult from its use. No license is
granted by im plicat ion or ot herw ise under any patent or pat ent right s of ST Micro electronics . Speci fication ment ioned in this publication are
subject to c hange without notice. This publication supers edes and replaces al l information previously supplied. STMicroelectron i cs products
are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.

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© 2001 STMicroelectronics – Printed in Italy – All Rights Reserved

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