Voltage Regulator. SPX2808 Datasheet

SPX2808 Regulator. Datasheet pdf. Equivalent


Sipex Corporation SPX2808
www.DataSheet4U.com
®
SPX2808
300mA Low Dropout Voltage Regulator
FEATURES
3.3V and 3.5V Versions
Input-Output Differential is 0.35V at 200mA
Input-Output Differential is 0.45V at 300mA
Mirror-Image Insertion Protection
Internal Thermal Protection
Available in SOT-223 and SOT-89
Packages
Short Circuit Protection
2% Output Accurancy, SPX2808A
APPLICATIONS
CD-ROMs
Scanners
Radio Control Systems
SOT-89 (M1)
SOT-223 (M3)
1 23
1 23
VIN GND VOUT
VIN GND VOUT
Top View
Now Available in Lead Free Packaging
Portable Instrumentation
Cordless Telephones
USBs
Toys
DESCRIPTION
The SPX2808 is a low power, positive voltage regulator. This device is an excellent choice for
use in battery-powered applications such as cordless telephones, radio control systems, and
portable computers. The SPX2808 features offers very low quiescent currents (0.4mA), and very
low drop output voltage (50mV at light load and 450mV at 300mA). The SPX2808 is offered in
a 3-pin SOT-223 and SOT-89 package.
TYPICAL APPLICATIONS CIRCUIT
VIN
1µF C 1
SPX2808
Gnd
VOUT
100µF,
ESR 0.05 to 0.6
ohms
Date: 5/25/04
SPX2808 300mA Low Dropout Voltage Regulator
1
© Copyright 2004 Sipex Corporation


SPX2808 Datasheet
Recommendation SPX2808 Datasheet
Part SPX2808
Description Low Dropout Voltage Regulator
Feature SPX2808; www.DataSheet4U.com ® SPX2808 300mA Low Dropout Voltage Regulator FEATURES ■ 3.3V and 3.5V Versio.
Manufacture Sipex Corporation
Datasheet
Download SPX2808 Datasheet




Sipex Corporation SPX2808
ABSOLUTE MAXIMUM RATINGS
Power Dissipation (note 3) ........................................ Internally limited
Lead Temp (soldering, 5 seconds) ............................................ 260°C
Storage Temperature Range ..................................... -65°C to +150°C
Input Supply Voltage Range .......................................... -0.3V to +30V
ESD Rating (note 4) ...................................................................... 2kV
RECOMMENDED OPERATING CONSITIONS
Input Supply Voltage Range ............................................. 3.0V to 26V
Operating Junction Temperature Range ....................... -40°C to 85°C
SOT-89 ΘJA ............................................................................. 90°C/W
SOT-223 ................................................................................. 60°C/W
ELECTRICAL CHARACTERISTICS
at TA=25°C, unless otherwise specified. (Note 1)
PARAMETER
CONDITIONS
Min Typ Max Min Typ Max Units
3.3V Version
SP2808A
SP2808
Quiescent Current (IQ)
Output Voltage (VOUT)
Line Regulation
Load Regulation
Dropout Voltage (VDROP)
Continuous Output
Current (IOUT)
Temperature Coefficient
Pulse Output Current
IOUT = 0mA, Except ICONT
IOUT = 50mA, Except ICONT
VIN = 8V, at Output Off
IOUT = 40mA,
5 VIN 10V
IOUT = 1mA60mA
IOUT = 1mA100mA
IOUT = 60mA
IOUT = 200mA
IOUT = 300mA
IOUT when VOUT drops 0.3V
from VO (typ)(Note 3)
5 ms pulse, 12.5% duty cycle
100
3.24 3.3
0.3
10
30
0.2
0.35
0.45
400
100
200
100 200
µA
3.36 3.20 3.3 3.40
V
0.4
0.3 0.4
%/V
40
10 40
mV
80
30 80
mV
0.3
0.2 0.3
V
0.7
0.35 0.7
V
0.45 V
400 mA
100 ppm/°C
300 300 mA
3.5V Version
Quiescent Current (IQ)
Output Voltage (VOUT)
Line Regulation
Load Regulation
Dropout Voltage (VDROP)
Continuous Output
Current (IOUT)
Temperature Coefficient
Pulse Output Current
IOUT = 0mA, Except ICONT
IOUT = 50mA, Except ICONT
VIN = 8V, at Output Off
IOUT = 40mA,
5 VIN 10V
IOUT = 1mA60mA
IOUT = 1mA100mA
IOUT = 60mA
IOUT = 200mA
IOUT = 300mA
IOUT when VOUT drops 0.3V
from VO (typ)(Note 3)
5 ms pulse, 12.5% duty cycle
100
3.43 3.5
0.3
10
30
0.2
0.35
0.45
400
100
200
100 200
µA
3.57 3.40 3.5 3.60
V
0.4
0.3 0.4
%/V
40
10 40
mV
80
30 80
mV
0.3
0.2 0.3
V
0.7
0.35 0.7
V
0.45 V
400 mA
100 ppm/°C
300 300 mA
NOTES:
Note 1: When mounted as recommended. Derate 11mW/°C for SOT-89 packages when ambient temperatures are over 25°C.
Note 2: See TYPICAL APPLICATIONS notes to ensure constant junction temperature, low duty cycle pulse testing used.
Note 3: All limits are at 25°C; Boldface limits are over the full operating junction temperature range of -40°C to +85°C.
Note 4: The maximum power dissipation is a function of maximum junction temperature, total thermal resistance, and ambient temperature.
Note 5: Human body model, 100pF discharged through 1.5k.
Date: 5/25/04
SPX2808 300mA Low Dropout Voltage Regulator
2
© Copyright 2004 Sipex Corporation



Sipex Corporation SPX2808
800
500 T J = 25ºC
400
T J = 85ºC
300
T J = -40ºC
200
100
0
0 10 20
INPUT VOLTAGE (V)
Figure 1. Peak Output Current
TYPICAL PERFORMANCE CHARACTERISTICS
2.0
1.6
1.2
0.8
0.4
0.0
30 0 10 20 30 40 50 60 70 80 90
AMBIENT TEMPERATURE (ºC)
Figure 2. Minimum Power Dissipation (SOT-89)
The SPX2808 requires an output capacitor for
device stability. The value required varies greatly
depending upon the application circuit and other
factors. The high frequency characteristics of
electrolytic capacitors depend greatly on the
type and also on the manufacturer. Sometimes
only bench testing is the only means to deter-
mine the proper capacitor type and value. The
high quality 100µF aluminum electrolytic cov-
ers all general application circuits, this stability
can be obtained with a tantalum electrolytic
value of 47µF.
Another critical point of electrolytic character-
istics is its performance over temperature. The
SPX2808 is designed to operate starting at -
40°C which may not be true in the case of
electrolytic. Higher temperatures generally no
problem. The electrolytic. type in aluminum
will freeze around -30°C. This could cause an
oscillation at output of regulator. At a lower
temperature requirement by many applications
the capacitor should maintain its performance.
So as a result, for an application which regulator
APPLICATION INFORMATION
junction temperature does not exceed 25°C, the
output capacitor can be reduced by the factor of
two over the value needed for the entire tem-
perature range.
In most applications the SPX2808 is operating
at few milliamps. In these applications the out-
put capacitance can be further reduced. For
example, when the regulator is running at 10mA
output current the output capacitance value is
half compared to the same regulator that is
running at 100mA. The value decreases with
higher output voltages, since the internal loop
gain is reduced.
The worst case occurs at the lower temperature
and maximum operating currents, the entire
circuit and the electrolytic, should be cooled
down to the minimum temperature. The mini-
mum of 0.6 volts required at the input of regula-
tor above the output to keep the power dissipa-
tion and die heating to its minimum. After the
value for the capacitor has been determined for
actual use, the value should be doubled.
Date: 5/25/04
SPX2808 300mA Low Dropout Voltage Regulator
3
© Copyright 2004 Sipex Corporation







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