L5950 STMicroelectronics, L5950 Datasheet - Page 5

• Manufacturer Part Number: L5950
• Description: IC VREG MULTI CAR MULTIWATT15
• Manufacturer: STMicroelectronics
• Series: -r

Specifications of L5950

• Applications: Converter, Car Audio System
• Voltage - Input: 7 ~ 26 V
• Number Of Outputs: 5
• Voltage - Output: 5V, 8.5V, 10V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Through Hole
• Package / Case: Multiwatt-15 (Vertical, Bent and Staggered Leads)
• Polarity: Positive
• Output Type: Selectable
• Output Voltage: 5 V, 8 V, 8.5 V, 10 V
• Output Current: 3 A
• Line Regulation: 55 mV
• Load Regulation: 55 mV
• Dropout Voltage (max): 1.5 V
• Input Voltage Max: 30 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: Through Hole
• Voltage Regulation Accuracy: 2.5 %
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ELECTRICAL CHARACTERISTICS (continued)
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 0.1 to 5 .
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.
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
the I
must be guaranteed to be lower than 0.2V. The
output voltage of REG4 is selected via bit 5 of the
I
Figure 1. Definition of Timing on the I
2
SDA
SCL
CHARACTERISTICS FOR I
C data byte: 8V is the output voltage if bit5 = ’0’
Symbol
V
V
V
2
f
V
V
SCL
C bus. When a given regulator is turned off it
HYS
OL1
OL2
I
IH
IL
I
P
t
BUP
LOW Level Input Voltage
HIGH Level Input Voltage
Input Hysteresis
LOW Level Output
Input Current
SCL Clock Frequency
S
t
HD;DAT
Parameter
t
LOW
2
C
t
HD;DAT
t
R
t
HIGH
2
C Bus.
Sink Current = 3mA
Sink Current = 6mA
0.4V
V
t
SU;DAT
Test Condition
t
F
I
0.9V
while 10V is the output voltage when bit5 = ’1’.
When all outputs are turned off the total current
draw must be minimized. I
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 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.
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.
Overvoltage: The IC will not operate if the BAT
voltage reaches 27V typ. or above.
DDmax
t
SU;STA
Sr
t
HD;STA
Min.
0.2
-10
3
D99AU1007
Typ.
2
C will run at a clock
t
Max.
SP
400
1.5
0.4
0.6
10
t
SU;STO
L5950
Unit
kHz
V
V
V
V
V
P
A
5/8