SPX2810AM3-5-0/TR [SIPEX]
Fixed Positive LDO Regulator, 5V, 1.2V Dropout, PDSO4, SOT-223, 3 PIN;型号: | SPX2810AM3-5-0/TR |
厂家: | SIPEX CORPORATION |
描述: | Fixed Positive LDO Regulator, 5V, 1.2V Dropout, PDSO4, SOT-223, 3 PIN 光电二极管 输出元件 调节器 |
文件: | 总9页 (文件大小:196K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
SPX2810
1A Low Dropout Voltage Regulator
Adjustable & Fixed Output,
Fast Response
FEATURES
APPLICATIONS
• Adjustable Output Down To 1.2V
• Fixed Output Voltages 1.5V, 2.5V, 3.0V, 3.3V, 5.0V
• Output Current Of 1A
• Portable Palmtop/Notebook Computer
• SMPS Post-Regulator
• Disk Drives
• Low Dropout Voltage 1.2V Typ.
• Portable Consumer Equipment
• Portable Instrumentation
• Battery charger
• Extremely Tight Load And Line Regulation
• Current & Thermal Limiting
• Standard 3-Terminal Low Cost TO-220, TO-263, TO-252 & SOT-223
PRODUCT DESCRIPTION
The SPX2810 is a low power positive voltage regulator designed to source 1A output current. This device is an excellent choice for
use in battery-powered applications and portable computers. The SPX2810 features very low quiescent current and very low dropout
voltage of 1.2V at a full load and lower as output current decreases. This product is available as adjustable or fixed 1.5V, 2.5V, 3.0V,
3.3V, and 5V output voltages.
The SPX2810 is offered in a 3-pin surface mount packages SOT-223, TO-220, TO-252 & DD package. The output capacitor of 10µF
or larger is needed for the output stability of SPX2810 as required by most other regulator circuits
PIN CONNECTIONS
TO-263-3 (T)
TO-220-3 (U)
TO-252 (R)
SPX2810
SOT-223 (M3)
SPX2810
SPX2810
SPX2810
1
2
3
1
2
3
1
3
2
1
2
3
ADJ/ GND
VOUT
V
IN
Top View
ADJ/GND VOUT VIN
VIN
Front View
ADJ/GND
VOUT
Top View
VIN
V
ADJ/GND
OUT
Front View
Rev. 10/30/00
SPX2810
ABSOLUTE MAXIMUM RATINGS
Lead Temp. (Soldering, 10 Seconds) .............................. 300°C
Storage Temperature Range ............................-65° to +150°C
Operating Junction Temperature Range ......................
SPX2810 Control Section.......................... -45°C +125°C
SPX2810 Power Transistor.........................-45°C +150°C
Input Voltage........................................................ 10V
Input to Output Voltage Differential .................... 10V
ELECTRICAL CHARACTERISTICS (NOTE 1) at IOUT = 10mA, TA=25°C, unless otherwise specified.
PARAMETER
CONDITIONS
Typ
SPX2810A
SPX2810
UNITS
Min
Max
Min
Max
1.5V Version
Output Voltage (Note 2)
SPX2810-1.5V, 0 < IOUT < 1A, 3.3V<VIN<10V
SPX2810-2.5V, 0 < IOUT < 1A, 4.0V<VIN<10V
1.5
1.485
1.47
1.515
1.53
1.470
1.455
1.530
1.545
V
V
2.5V Version
Output Voltage (Note 2)
2.5
2.475
2.525
2.450
2.550
2.45
2.55
2.425
2.575
2.85V Version
Output Voltage (Note 2)
2.85
3
2.822
2.879
2.793
2.907
V
V
SPX2810-2.85V, 0 ≤ IOUT ≤ 1A,
4.5V≤VIN≤10V
2.793
2.907
2.650
2.936
3.0V Version
Output Voltage (Note 2)
2.970
2.940
3.030
3.060
2.94
2.79
3.06
3.09
SPX2810-3.0V, 0 ≤ IOUT ≤ 1A, 4.5V≤VIN≤10V
SPX2810-3.3V, 0 ≤ IOUT ≤ 1A, 4.8V≤VIN≤10V
SPX2810-5.0V, 0 ≤ IOUT ≤ 1A, 6.5V≤VIN≤12V
3.3V Version
Output Voltage (Note 2)
3.3
5
3.267
3.234
3.333
3.366
3.234
3.069
3.366
3.399
V
V
5.0V Version
Output Voltage (Note 2)
4.950
5.050
4.9
5.1
4.900
5.100
4.65
5.15
All Voltage Options
Reference Voltage (VREF
)
1.250
1.225
1.270
1.225
1.270
V
mA
%
VIN≤ 7V, P≤ Pmax
1.263
1.225
1.212
1.288
1.5V≤ (VIN -VOUT)≤5.75V, 10mA≤IOUT≤1A
1.5V≤ (VIN –VOUT)≤5.75V
Min. Load Current (Note 3)
5
10
10
0.005
0.005
0.05
0.2
0.2
0.3
0.2
0.2
0.3
Line Regulation (∆VREF(Vin))
2.75V≤VIN ≤7V, IOUT=10mA, TJ=25ºC (Note 3)
VIN≤7V, IOUT=0mA, TJ=25ºC (Note 2)
%
Load Regulation(∆VREF(IOUT))
10mA≤IOUT ≤1A, (VIN-VOUT)=3V, TJ=25ºC
(Note 3)
0.05
1.1
0.3
1.2
0.3
1.2
0≤IOUT ≤1A, VIN=7V, TJ=25ºC (Note 2)
Dropout Voltage
Current Limit
∆VREF=1%
IOUT = 1A (Note 3)
OUT ≤ 1A (Note 2)
VIN=7V
I
2
1.2
1.2
A
I
OUT(MAX)
1.4V ≤ (VIN- VOUT) (Note3)
Rev. 10/30/00
SPX2810
ELECTRICAL CHARACTERISTICS (Cont.)
Long Term Stability
TA=125ºC, 1000 Hrs.
0.3
(Note 2)
0.01
0.25
0.003
1
1
%
TA=25ºC, 20 ms pulse
0.020
0.020
%/W
%
% Vo
Thermal Regulation (∆VOUT(Pwr))
Temperature Stability (∆VOUT(T))
Output Noise, RMS
10Hz to 10kHz TA=25ºC
TO-220
Thermal Resistance
Junction to Tab
3.0
60
3.0
60
Junction to Ambient
DD Package
Junction to Tab
3.0
60
3.0
60
ºC/W
Junction to Ambient
SOT-223 Package
Junction to Tab
15
156
15
156
Junction to Ambient
The Bold specifications apply to the full operating temperature range.
Note 1: Changes in output voltage due to heating effects are covered under the specification for thermal regulation.
Note 2: Fixed Version Only
Note 3: Adjustable Version Only
Rev. 10/30/00
SPX2810
APPLICATION HINTS
Reducing parasitic resistance and inductance
One solution to minimize parasitic resistance and inductance is
to connect in parallel capacitors. This arrangement will
improve the transient response of the power supply if your
system requires rapidly changing current load condition.
The SPX2810 incorporates protection against over-current
faults, reversed load insertion, over temperature operation, and
positive and negative transient voltage. However, the use of
an output capacitor is required in order to improve the stability
and the performances.
Thermal Consideration
Stability
Although the SPX2810 offers some limiting circuitry for
overload conditions, it is necessary not to exceed the
maximum junction temperature, and therefore to be careful
about thermal resistance. The heat flow will follow the lowest
resistance path, which is the Junction-to-case thermal
resistance. In order to insure the best thermal flow of the
component, a proper mounting is required. Note that the case
of the device is electrically connected to the output. In case
the case has to be electrically isolated, a thermally conductive
spacer can be used. However do not forget to consider its
contribution to thermal resistance.
The output capacitor is part of the regulator’s frequency
compensation system. Either a 22µF aluminum electrolytic
capacitor or a 10µF solid tantalum capacitor between the
output terminal and ground guarantees stable operation for all
operating conditions.
However, in order to minimize overshoot and undershoot, and
therefore optimize the design, please refer to the section
‘Ripple Rejection’.
Ripple Rejection
Assuming:
Ripple rejection can be improved by adding a capacitor
between the ADJ pin and ground as shown in figure 6. When
ADJ pin bypassing is used, the value of the output capacitor
required increases to its maximum (22µF for an aluminum
electrolytic capacitor, or 10µF for a solid tantalum capacitor).
If the ADJ pin is not bypass, the value of the output capacitor
can be lowered to 10µF for an electrolytic aluminum capacitor
or 4.7µF for a solid tantalum capacitor.
V
IN = 10V, VOUT = 5V, IOUT = 1.5A, TA = 50°C/W,
θ Heatsink Case= 6°C/W, θ Heatsink Case = 0.5°C/W, θ JC = 3°C/W
Power dissipation under this condition
PD = (VIN – VOUT) * IOUT = 7.5W
Junction Temperature
TJ = TA + PD * (θ Case - HS+ θ HS + θ JC
)
However the value of the ADJ-bypass capacitor should be
chosen with respect to the following equation:
For the Control Sections
C = 1 / ( 6.28 * FR * R1 )
TJ = 50 + 7.5*(0.5+6=3) = 121.25°C
121.25°C < TJ (max) for the Control & Power Sections.
Where C
= value of the capacitor in Farads (select an
equal or larger standard value),
FR = ripple frequency in Hz,
R1 = value of resistor R1 in Ohms.
In both case reliable operation is insured by adequate junction
temperature.
If an ADJ-bypass capacitor is use, the amplitude of the output
ripple will be independent of the output voltage. If an ADJ-
bypass capacitor is not used, the output ripple will be
proportional to the ratio of the output voltage to the reference
voltage:
M = VOUT / VREF
Where M = multiplier for the ripple seen when the ADJ pin
is optimally bypassed.
V
REF = Reference Voltage
Rev. 10/30/00
SPX2810
Basic Adjustable Regulator
VIN
VOUT
SPX2810
VIN
5V
VREF
VOUT
3.3V
R1
R2
SPX2810
IADJ
C2
10uF
50µA
C1
10uF
VOUT = VREF * ( 1 + R/R1) + IADJ * R2
2
Basic Fixed Regulator
Fig.2 Basic Adjustable Regulator
Output Voltage
Consider Figure 2. The resistance R1 generates a constant
current flow, normally the specified load current of 10mA.
This current will go through the resistance R2 to set the overall
output voltage. The current IADJ is very small and constant.
Therefore its contribution to the overall output voltage is very
small and can generally be ignored.
Output Voltage
The fixed voltage LDO voltage regulator are simple to use
regulators since the VOUT is preset to the specifications. It is
important however, to provide the proper output capacitance
for stability and improvement. For most operating conditions
a capacitance of 22uF tantalum or 100uF electrolytic will
ensure stability and prevent oscillation.
Load Regulation
Parasitic line resistance can degrade load regulation. In order
not to affect the behavior of the regulator, it is best to connect
directly the R1 resistance from the resistor divider to the case,
and not to the load. For the same reason, it is best to connect
the resistor R2 to the Negative side of the load.
R
P Parasitic Line
Resistance
VIN
SPX2810
Connect R 1 to
Case of Regulator
R1
RL
R2
Connect R 2 to Load
Fig.3 Basic Adjustable Regulator
Rev. 10/30/00
SPX2810
TYPICAL APPLICATIONS
VIN
VOUT
VIN
OUT
SPX2810
IN
SPX2810
OUT
IN
C2
C1
C1
R1
ADJ
R1
ADJ
R2
VOUT = VREF (1 + R ) + IADJ R2
R21
LOAD
Fig. 5 Typical Adjustable Regulator
Fig. 4 1A Current output Regulator
(Note A)
VIN
5V
VIN
(Note A)
IN
SPX2810 OUT
ADJ
5V
IN
OUT
VOUT
SPX2810
+
10µF
121Ω
ADJ
R1
121Ω
1%
1%
+
+
10µF
1k
100µF
TTL
Input
150µF
2N3904
1k
*C1 improves ripple rejection. Xc
should be ~ R 1 at ripple frequency.
365Ω
1%
R2
365Ω
1%
+
C1
10µF*
Note A: VIN(MIN)= (Intended VOUT) + (VDROPOUT (MAX)
)
Note A: VIN(MIN)= (Intended VOUT) + (VDROPOUT (MAX)
)
Fig. 6 Improving Ripple Rejection
Fig.7 5V Regulator with Shutdown
Rev. 10/30/00
SPX2810
TYPICAL CHARACTERISTICS
Rev. 10/30/00
SPX2810
ORDERING INFORMATION
Ordering No
SPX2810U
Precision
2%
2%
2%
2%
2%
2%
1%
1%
1%
1%
1%
1%
2%
2%
2%
2%
2%
2%
1%
1%
1%
1%
1%
1%
2%
2%
2%
2%
2%
2%
1%
1%
1%
1%
1%
1%
2%
2%
2%
2%
2%
2%
1%
1%
1%
1%
1%
1%
Output Voltage Packages
Adj
3 Lead TO-220
3 Lead TO-220
3 Lead TO-220
3 Lead TO-220
3 Lead TO-220
3 Lead TO-220
3 Lead TO-220
3 Lead TO-220
3 Lead TO-220
3 Lead TO-220
3 Lead TO-220
3 Lead TO-220
3 Lead TO-263
3 Lead TO-263
3 Lead TO-263
3 Lead TO-263
3 Lead TO-263
3 Lead TO-263
3 Lead TO-263
3 Lead TO-263
3 Lead TO-263
3 Lead TO-263
3 Lead TO-263
3 Lead TO-263
3 Lead SOT-223
3 Lead SOT-223
3 Lead SOT-223
3 Lead SOT-223
3 Lead SOT-223
3 Lead SOT-223
3 Lead SOT-223
3 Lead SOT-223
3 Lead SOT-223
3 Lead SOT-223
3 Lead SOT-223
3 Lead SOT-223
3 Lead TO-252
3 Lead TO-252
3 Lead TO-252
3 Lead TO-252
3 Lead TO-252
3 Lead TO-252
3 Lead TO-252
3 Lead TO-252
3 Lead TO-252
3 Lead TO-252
3 Lead TO-252
3 Lead TO-252
1.5V
2.5V
3.0V
3.3V
5.0V
Adj
SPX2810U-1.5
SPX2810U-2.5
SPX2810U-3.0
SPX2810U-3.3
SPX2810U-5.0
SPX2810AU
1.5V
2.5V
3.0V
3.3V
5.0V
Adj
SPX2810AU-1.5
SPX2810AU-2.5
SPX2810AU-3.0
SPX2810AU-3.3
SPX2810AU-5.0
SPX2810T
1.5V
2.5V
3.0V
3.3V
5.0V
Adj
SPX2810T-1.5
SPX2810T-2.5
SPX2810T-3.0
SPX2810T-3.3
SPX2810T-5.0
SPX1202AT
1.5V
2.5V
3.0V
3.3V
5.0V
Adj
SPX2810AT-1.5
SPX2810AT-2.5
SPX2810AT-3.0
SPX2810AT-3.3
SPX2810AT-5.0
SPX2810M3
1.5V
2.5V
3.0V
3.3V
5.0V
Adj
SPX2810M3-1.5
SPX2810M3-2.5
SPX2810M3-3.0
SPX2810M3-3.3
SPX2810M3-5.0
SPX2810AM3
SPX2810AM3-1.5
SPX2810AM3-2.5
SPX2810AM3-3.0
SPX2810AM3-3.3
SPX2810AM3-5.0
SPX2810R
1.5V
2.5V
3.0V
3.3V
5.0V
Adj
1.5V
2.5V
3.0V
3.3V
5.0V
Adj
SPX2810R-1.5
SPX2810R-2.5
SPX2810R-3.0
SPX2810R-3.3
SPX2810R-5.0
SPX2810AR
1.5V
2.5V
3.0V
3.3V
5.0V
SPX2810AR-1.5
SPX2810AR-2.5
SPX2810AR-3.0
SPX2810AR-3.3
SPX2810AR-5.0
Rev. 10/30/00
SPX2810
Corporation
SIGNAL PROCESSING EXCELLENCE
Sipex Corporation
Headquarters and Main Offices:
22 Linnell Circle
Billerica, MA 01821
TEL: (978) 667-8700
FAX: (978) 670-9001
e-mail: sales@sipex.com
233 South Hillview Drive
Milpitas, CA 95035
TEL: (408) 935-7600
FAX: (408) 934-7500
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
hereing; neither does it convey any license under its patent rights nor the rights of others.
Rev. 10/30/00
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