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查询SPX2808供应商
®
300mA Low Dropout Voltage Regulator
SPX2808
FEATURES
SOT-89 (M1)
SOT-223 (M3)
■ 3.3V and 3.5V Versions
■ Input-Output Differential is 0.35V at 200mA
1
2
■ 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
1
2
3
V
GND
IN
Top V iew
V
OUT
V
Now Available in Lead Free Packaging
3
V
GND
IN
OUT
■ 2% Output Accurancy, SPX2808A
APPLICATIONS
■ CD-ROMs
■ Scanners
■ Radio Control Systems
■ 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
V
V
IN
OUT
SPX2808
1µF
Date: 5/25/04 SPX2808 300mA Low Dropout Voltage Regulator © Copyright 2004 Sipex Corporation
C
1
Gnd
1
100µF,
ESR 0.05 to 0.6
ohms
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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 Θ
SOT-223 ................................................................................. 60°C/W
.............................................................................90°C/W
JA
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)I
Output Voltage (V
)I
OUT
Line Regulation I
Load Regulation I
Dropout Voltage (V
DROP
Continuous Output I
Current (I
) from VO (typ)(Note 3)
OUT
Temperature Coefficient 100 100 ppm/°C
Pulse Output Current 5 ms pulse, 12.5% duty cycle 300 300 mA
3.5V Version
Quiescent Current (IQ)I
Output Voltage (V
)I
OUT
Line Regulation I
Load Regulation I
Dropout Voltage (V
DROP
Continuous Output I
Current (I
) from VO (typ)(Note 3)
OUT
Temperature Coefficient 100 100 ppm/°C
Pulse Output Current 5 ms pulse, 12.5% duty cycle 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 1.5kΩ.
= 0mA, Except I
OUT
= 50mA, Except I
OUT
V
= 8V, at Output Off 3.24 3.3 3.36 3.20 3.3 3.40 V
IN
= 40mA,
OUT
5 ≤ V
≤ 10V 0.3 0.4 0.3 0.4 %/V
IN
= 1mA→60mA 10 40 10 40 mV
OUT
I
= 1mA→100mA 30 80 30 80 mV
OUT
)I
= 60mA 0.2 0.3 0.2 0.3 V
OUT
I
= 200mA 0.35 0.7 0.35 0.7 V
OUT
I
= 300mA 0.45 0.45 V
OUT
when V
OUT
= 0mA, Except I
OUT
= 50mA, Except I
OUT
V
= 8V, at Output Off 3.43 3.5 3.57 3.40 3.5 3.60 V
IN
= 40mA,
OUT
5 ≤ V
≤ 10V 0.3 0.4 0.3 0.4 %/V
IN
= 1mA→60mA 10 40 10 40 mV
OUT
I
= 1mA→100mA 30 80 30 80 mV
OUT
)I
= 60mA 0.2 0.3 0.2 0.3 V
OUT
I
= 200mA 0.35 0.7 0.35 0.7 V
OUT
I
= 300mA 0.45 0.45 V
OUT
when V
OUT
CONT
CONT
drops 0.3V 400 400 mA
OUT
CONT
CONT
drops 0.3V 400 400 mA
OUT
100 200 100 200 µA
100 200 100 200 µA
Date: 5/25/04 SPX2808 300mA Low Dropout Voltage Regulator © Copyright 2004 Sipex Corporation
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800
500
400
300
200
OUTPUT CURRENT (mA)
100
T
= 25ºC
J
T
= 85ºC
J
T
J
= -40ºC
TYPICAL PERFORMANCE CHARACTERISTICS
2.0
1.6
1.2
0.8
POWER DISSIPATION (W)
0.4
0
0
Figure 1. Peak Output Current Figure 2. Minimum Power Dissipation (SOT-89)
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INPUT VOLTAGE (V)
20
30
0.0
010
30
20
AMBIENT TEMPERATURE (ºC)
40
60 90
50
80
70
APPLICATION INFORMATION
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
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 temperature range.
electrolytic capacitors depend greatly on the
type and also on the manufacturer. Sometimes
only bench testing is the only means to determine the proper capacitor type and value. The
high quality 100µF aluminum electrolytic covers all general application circuits, this stability
can be obtained with a tantalum electrolytic
value of 47µF.
In most applications the SPX2808 is operating
at few milliamps. In these applications the output 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
Another critical point of electrolytic character-
gain is reduced.
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
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 minimum of 0.6 volts required at the input of regulator above the output to keep the power dissipation 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 © Copyright 2004 Sipex Corporation
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PACKAGE: 3 PIN SOT-89
D
3
D1
1
e
e1
3 PIN SOT-89
A
b
L
b1
C
D
D1
H
E
e
e1
Ø1.0
2
Dimensions in (mm)
MIN NOM MAX
1.40 1.50 1.60
0.36 0.42 0.48
0.80 - 1.20
0.41 0.47 0.53
0.38 0.40 0.43
4.40 4.50 4.60
1.40 1.60 1.75
3.94 - 4.25
2.40 2.50 2.60
1.45 1.50 1.55
2.90 3.00 3.10
E
H
5º(2x)
L
C
8º(2x)
Ro.15
bb1
b
3 PIN SOT-89
Date: 5/25/04 SPX2808 300mA Low Dropout Voltage Regulator © Copyright 2004 Sipex Corporation
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PACKAGE: 3 PIN SOT-223
C
D
C
N
C
b2
E1
1
B
3 PIN SOT-223
JEDEC TO-261
(AA) Variation
B
e
b
Dimensions in (mm)
MIN NOM MAX
A
A1
A2
b
b2
c
D
E
E1
e
e1 4.60 BASIC
L
ø
0.02 - 0.10
1.50 1.60 1.70
0.66 0.76 0.84
2.90 3.00 3.10
0.23
6.30
6.70 7.00 7.30
3.30 3.50 3.70
0.75 - 0º
- - 1.80
0.30
6.50
2.30 BASIC
- 10º
0.35
6.70
E
A
C
See detail
A
H
A1
GAUGE
PLANE
SEATING
PLANE
L
0
b
WITH PLATING
c
BASE METAL
c
Section B-B
b2
Section C-C
3 PIN SOT-223
Date: 5/25/04 SPX2808 300mA Low Dropout Voltage Regulator © Copyright 2004 Sipex Corporation
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ORDERING INFORMATION
PART NUMBER ACCURACY OUTPUT VOLTAGE PACKAGE
SPX2808M1-3.3 2% 3.3V 3 lead SOT-89
SPX2808M1-3.3/TR 2% 3.3V 3 lead SOT-89
SPX2808M1-3.5 2% 3.5V 3 lead SOT-89
SPX2808M1-3.5/TR 2% 3.5V 3 lead SOT-89
SPX2808M1-3.3 3% 3.3V 3 lead SOT-89
SPX2808M1-3.3/TR 3% 3.3V 3 lead SOT-89
SPX2808M1-3.5 3% 3.5V 3 lead SOT-89
SPX2808M1-3.5/TR 3% 3.5V 3 lead SOT-89
SPX2808M3-3.3 2% 3.3V 3 lead SOT-223
SPX2808M3-3.3/TR 2% 3.3V 3 lead SOT-223
SPX2808M3-3.5 2% 3.5V 3 lead SOT-223
SPX2808M3-3.5/TR 2% 3.5V 3 lead SOT-223
SPX2808M3-3.3 3% 3.3V 3 lead SOT-223
SPX2808M3-3.3/TR 3% 3.3V 3 lead SOT-223
SPX2808M3-3.5 3% 3.5V 3 lead SOT-223
SPX2808M3-3.5/TR 3% 3.5V 3 lead SOT-223
Available in lead free packaging. To order add “-L” suffix to part number.
Example: SPX2808M3-3.5/TR = standard; SPX2808M3-L-3.5/TR = lead free
/TR = Tape and Reel
Pack quantity is 2,500 for SOT-89 and SOT-223.
Corporation
ANALOG EXCELLENCE
Sipex Corporation
Headquarters and
Sales Office
233 South Hillview Drive
Milpitas, CA 95035
TEL: (408) 934-7500
FAX: (408) 935-7600
Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the
application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others.
Date: 5/25/04 SPX2808 300mA Low Dropout Voltage Regulator © Copyright 2004 Sipex Corporation
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