SPX2815AR-2.5 [SIPEX]
1.5A Low Dropout Voltage Regulator Adjustable & Fixed Output, Fast Response; 1.5A低压差稳压器可调节和固定输出，响应速度快
| 型号： | SPX2815AR-2.5 |
| 厂家： | 
SIPEX CORPORATION |
| 描述： | 1.5A Low Dropout Voltage Regulator Adjustable & Fixed Output, Fast Response |
| 文件： | 总10页 (文件大小：74K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
®
SPX2815
1.5A Low DropoutVoltage Regulator
APPLICATIONS
FEATURES
■ Desktop PC's Servers
■ Powering VGA and Sound Cards
■ Cordless Phones
■ Guaranteed 1.5A Output Current
■ Three Terminal Adjustable or Fixed
2.5V, 3.3V and 5.0V
■ Low Quiescent Current
■ Battery Chargers
■ Low Dropout Voltage of 1.1V at 1.5A
■ 0.1% Line and 0.1% Load Regulation
■ Stable with 10uF Ceramic Capacitor
■ Overcurrent and Thermal Protection
■ Available Packages: TO-252,
TO-220, and TO-263
■ Adjustable Power Supplies
■ Portable Instrumentation
■ SMPS Post-Regulator
■ Constant Current Regulators
■ Disk Drives
■ Similar to Industry Standard LT1086/
Refer to Page 5 for Pinouts
LT1586
DESCRIPTION
The SPX2815 is a low power positive-voltage regulator designed to satisfy moderate power
requirements with a cost effective, small footprint solution. This device is an excellent choice for
use in battery-powered applications and portable computers. The SPX2815 features very low
quiescent current and a low dropout voltage of 1.1V at a full load. As output current decreases,
quiescent current flows into the load, increasing efficiency. SPX2815 is available in adjustable
or fixed 2.5V, 3.3V and 5.0V output voltages.
TheSPX2815isofferedinseveral3-pinsurfacemountpackages:TO-252,TO-220andTO-263.
An output capacitor of 10µF ceramic or tantalum provides unconditional stability.
FUNCTIONAL DIAGRAM (Adjustable)
V
IN
+
-
Current Limit
V
OUT
ICL
_
AMP
+
1.25V
V
REF
+
–
Thermal Limit
ADJ/GND
–
~
IADJ 50µA
I TL
Date: 5/17/04
SPX2815 1.5A Low Dropout Voltage Regulator
© Copyright 2004 Sipex Corporation
1
ABSOLUTE MAXIMUM RATINGS
Operating Junction Temperature Range.....-40°C to +125°C
Input Supply Voltage .................................................... +10V
Input to Output Voltage ................................................ +8.8V
ESD Rating .............................................................. 2kV min
Power Dissipation.......................................Internally Limited
Lead Temperature (soldering, 5 seconds) ...............260°C
Storage Temperature Range.......................-65°C to +150°C
ELECTRICAL CHARACTERISTICS
at VIN=VOUT + 1.5V, TA = 25°C, CIN = COUT = 10µF, IOUT =10mA, unless otherwise specified. The Boldface applies over the
full operating temperature range.
PARAMETER
MIN
TYP
MAX MIN
TYP
MAX
UNITS
CONDITIONS
2.5V Version
SPX2815A
SPX2815
Output Voltage
2.475 2.500
2.525 2.450 2.500
2.550
V
IOUT = 10mA, VIN =4.5V
2.450
2.550 2.425
2.575
10mA ≤ IOUT ≤ 3A, 4.25V ≤ VIN ≤ 10V
3.30V Version
Output Voltage
3.267 3.300
3.234
3.333 3.234 3.300
3.366 3.201
3.366
3.399
V
V
IOUT = 10mA, VIN =5V
10mA ≤ IOUT ≤ 3A, 4.75V ≤ VIN ≤ 10V
5.0V Version
Output Voltage
4.950 5.000
5.050 4.900 5.000
5.100
IOUT=10mA, VIN=7V
4.900
5.100 4.850
5.150
10mA ≤ IOUT ≤ 3A, 6.50V ≤ VIN ≤ 10V
All Voltage Options
Reference Voltage
1.238 1.250
1.262 1.225 1.250
1.275
V
IOUT=10mA, (VIN - VOUT )= 2V
1.225
1.275 1.212
1.287
10mA≤IOUT≤ 3A, 1.5V≤(VIN-VOUT)≤ 10V
Output Voltage
Temperature Stability
0.3
0.5
%
%
Line Regulation
0.1
0.1
0.1
0.2
0.2
0.2
0.1
0.1
0.1
0.2
0.2
0.2
4.25V≤VIN≤ 10V,VOUT=2.5V,IOUT=10mA
4.75V≤VIN≤ 10V,VOUT=3.3V,IOUT=10mA
6.50V≤VIN≤ 10V,VOUT=5.0V,IOUT=10mA
Load Regulation
0.1
0.1
0.1
0.3
0.3
0.3
0.1
0.1
0.1
0.3
0.3
0.3
%
V
10mA≤IOUT≤ 1.5A, VOUT=2.5V
10mA≤IOUT≤ 1.5A, VOUT=3.3V
10mA≤IOUT≤ 1.5A, VOUT=5.0V
Dropout Voltage
(Note 2)
1.00
1.10
1.00
1.10
IOUT=0.5A
IOUT=1.5A
1.2
10
1.2
10
Quiescent Current
Adjust Pin Current
Current Limit
4
50
4
mA
µA
A
Fixed voltage versions
120
50
120
2.5
2.5
60
(VIN-VOUT)=5V
Thermal Regulation
Ripple Rejection
0.01
0.1
0.01
75
0.1
%/W
dB
25°C, 30mS pulse
60
75
fRIPPLE=120Hz, (VIN-VOUT)=2V,
VRIPPLE=1VPP
Long Term Stability
RMS Output Noise
0.03
0.03
%
%
125°C, 1000Hrs
0.003
0.003
% of VOUT, 10Hz≤f≤10kHz
Date: 5/17/04
SPX2815 1.5A Low Dropout Voltage Regulator
© Copyright 2004 Sipex Corporation
2
TYPICAL PERFORMANCE CHARACTERISTICS
1.275
1.27
3.325
3.320
3.315
3.310
3.305
3.300
1.265
1.26
1.255
1.25v Adj
1.25
1.245
1.24
1.235
1.23
1.225
4.5
6.5
8.5
10.5
12.5
14.5
-50
-30
-10
10
30
50
70
90
110
130
Vin (V)
Temp (C)
Figure 1. Line Regulation for SPX2815U-3.3; IOUT=10mA
Figure 2. VOUT vs Temperature, VIN=2.5V, IOUT=10mA
3.38
2.55
2.54
2.53
2.52
2.51
2.5
2.5v Adj
3.3v Adj
3.3v Fixed
3.36
3.34
2.5v Fixed
3.32
3.3
2.49
2.48
2.47
2.46
2.45
3.28
3.26
-50
-30
-10
10
30
50
70
90
110
130
-50
-30
-10
10
30
50
70
90
110
130
Temp (C)
Temp (C)
Figure 3. VIN=4.0V, IOUT=10mA
Figure 4. VIN=5.0V, IOUT=10mA
APPLICATION INFORMATION
Output Capacitor
continuous load conditions such that the maxi-
mum junction temperature does not exceed
125°C.Thermalprotectionisactivatedat>179°C
and deactiviated at <165 °C.
To ensure the stability of the SPX2815, an
output capacitor of at least 10µF (ceramic or
tantalum) or 22µF (aluminum) is required. The
value may change based on the application
requirements of the output load or temperature
range. The value of ESR can vary based on the
type of capacitor used in the applications to
guarantee stability. The recommended value
for ESR is 0.5Ω or less. A larger value of output
capacitance (up to 100µF) can improve the load
transient response.
The thermal interaction from other components
in the application can effect the thermal resis-
tance of the SPX2815. The actual thermal
resistance can be determined with experimenta-
tion.
SPX2815 power dissipation is calculated as
follows:
PD = (VIN - VOUT)(IOUT
)
Soldering Methods
Maximum Junction Temperature range:
TJ = TA(max) + PD* thermal resistance
(junction-to-ambient)
TheSPX2815dieisattachedtotheheatsinklead
whichexitsoppositetheinput,output,andground
pins.
Maximum junction temperature must not ex-
Thermal Characteristics
ceed the 125°C.
The SPX2815 features the internal thermal lim-
iting to protect the device during overload con-
ditions. Special care needs to be taken during
Date: 5/17/04
SPX2815 1.5A Low Dropout Voltage Regulator
© Copyright 2004 Sipex Corporation
3
APPLICATION INFORMATION: Continued
Ripple Rejection
Ripple rejection for the adjustable version is
shown in Figure 5.
Ripple rejection can be improved by adding a
capacitor between the ADJ pin and ground as
shown in Figure 8. When ADJ pin bypassing
is used, the value of the output capacitor
required increases to its maximum. If the ADJ
pin is not bypassed, the value of the output
capacitor can be lowered to 22µF for an
electrolytic aluminum capacitor or 10µF for a
solid tantalum capacitor (Fig 7).
Output Voltage
The output of the adjustable regulator can be
set to any voltage between 1.25V and 15V.
The value of VOUT can be quickly approxi-
mated using the formula
VOUT=1.25 *(R1 + R2)/R1
However the value of the ADJ-bypass capaci-
tor should be chosen with respect to the
following equation:
A small correction to this formula is required
depending on the values of resistors R1 and R2,
since the adjustable pin current (approx
50µA) flows through R2. When IADJ is taken
into account, the formula becomes
C = 1 / ( 6.28 * FR * R1 )
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.
VOUT = VREF(1+ (R2/R1)) + IADJ * R2
where
VREF=1.25V
If an ADJ-bypass capacitor is used, the
amplitude of the output ripple will be indepen-
dent 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:
Layout Considerations
Parasitic line resistance can degrade load
regulation. In order to avoid this, connect R1
directly to VOUT as illustrated in Figure 13.
For the same reason, R2 should be connected
to the negative side of the load.
M = VOUT / VREF
Where M = multiplier for the ripple seen when
the ADJ pin is optimally bypassed.
VREF =1.25V
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
V IN
SPX2815
VOUT
IN
OUT
+
4.7µF
C1
C 2
ADJ
R1
IOUT
VREF
R1
LOAD
IOUT
=
10
100
1000
10000
100000
1000000
Frequency, Hz
Figure 6. Current Source
Figure 5. Ripple Rejection; Vin=3.3V, Vout=1.8V (adj.),
Iload=200mA
Date: 5/17/04
SPX2815 1.5A Low Dropout Voltage Regulator
© Copyright 2004 Sipex Corporation
4
APPLICATION INFORMATION: Continued
SPX2815
(Note A)
V IN
5V
IN
OUT
VOUT
+
VIN
VOUT
SPX2815
4.7µF
OUT
ADJ
IN
R1
+
C2
C1
330Ω
1%
4.7µF
VREF
R1
R2
ADJ
IADJ
50µA
10µF
R2
1kΩ,
+
C1
10µF*
*C 1 improves ripple rejection.
VOUT = V
) +I
ADJ R 2
REF (1+R 2 /R1
1%
Z
C should be ~ R1 at ripple frequency
OUT ) + (V DROPOUT (MAX)
= (Intended V
)
Note A:
V
IN(MIN)
Figure 7. Typical Adjustable Regulator
Figure 8. Improving Ripple Rejection
R
P Parasitic Line
Resistance
SPX2815
VIN
OUT
5V
IN
VIN
VOUT
SPX2815
(Note A)
330W
1%
ADJ
+
ADJ
+
4.7µF
10µF
to
Connect R
1K
R 1
TTL
Case of Regulator
2N3904
Input
1kΩ
1%
Connect R2
to Load
1k
R L
R 2
Note A:
V
IN(MIN) = (Intended VOUT ) + (V
)
DROPOUT (MAX)
Figure 9. 5V Regulator with Shutdown
Figure 10. Recommended Connections for Best Results
PINOUTS
TO-220-3 (U)
TO-263-3 (T)
TO-252 (R)
1
2
3
2
1
3
1
2
3
ADJ/GND
V
VIN
OUT
ADJ/GND
VOUT
VIN
Front View
Top View
ADJ/GND
VOUT
VIN
Front View
Date: 5/17/04
SPX2815 1.5A Low Dropout Voltage Regulator
© Copyright 2004 Sipex Corporation
5
PACKAGE: 3 PIN TO-263
SEATING PLANE
A
E
E/2
C2
L1
D
H
1
2
3
B
B
c
e
See View C
b
b2
SEATING
PLANE
GAUGE PLANE
0º-8º
A1
L
3-PIN TO-263
JEDEC TO-263
(AA) Variation
Dimensions in inches
MIN NOM MAX
View C
A
A1
b
.160
.000
-
.190
.010
-
.020
.015
.330
-
.039
.029
.380
b
c
-
-
D
WITH PLATING
c
D1
E
.270
-
-
.420
-
.380
.245
-
E1
-
e
.100 BSC
.625
H
.575
-
BASE METAL
SECTION B-B
L
.070
-
.110
.066
.070
L1
L2
L3
-
-
-
-
.010 BSC
3 PIN TO-263
Date: 5/17/04
SPX2815 1.5A Low Dropout Voltage Regulator
© Copyright 2004 Sipex Corporation
6
PACKAGE: 3 PIN TO-220
A
E
B
E/2
E2
SEATING
PLANE
A
øP
Q
A1
H1
D
D1
CHAMFER
OPTIONAL
L1
1
D
D
C
C
L
b
A
e
C
e1
A2
3 PIN TO-220
JEDEC TO-220
(AB) Variation
Dimensions in
(mm)
MIN NOM MAX
b
A
.140
.020
-
-
.190
.055
A1
A2
b
WITH PLATING
c
.080
-
.115
.015 .027 .040
b2
c
.045
.014
.560
-
.070
.024
.650
-
-
D
D1
.330
.480
.380
.270
-
-
-
-
-
.355
.507
.420
.350
BASE METAL
CONTACT AREA
D2
E
E1
E2
e
-
.030
.100 BSC
.200 BSC
e1
.230
-
.270
.250
H1
L1
-
-
3 PIN TO-220
-
-
-
L2
.139
.100
-
.161
.135
∆P
Q
-
Date: 5/17/04
SPX2815 1.5A Low Dropout Voltage Regulator
© Copyright 2004 Sipex Corporation
7
PACKAGE: 3 PIN TO-252
GAUGE PLANE
c
C
SEATING PLANE
c
L
A1
L2
O
(L1)
b
E1
WITH PLATING
E1/2
c
D1
BASE METAL
CONTACT AREA
3 PIN TO-252
JEDEC TO-252
(AA) Variation
Dimensions in inches
MIN NOM MAX
-
-
.005
.024
A1
c
.018
-
-
.205
.170
-
-
D1
E1
H
-
.370
-
.410
.070
.055 .060
.108 REF
.020 BSC
L
L1
3 PIN TO-252
L2
Date: 5/17/04
SPX2815 1.5A Low Dropout Voltage Regulator
© Copyright 2004 Sipex Corporation
8
ORDERING INFORMATION
PART NUMBERS
ACC.
TOP MARK
OUTPUT VOLTAGE
PACKAGE
SPX2815AR ............................. 1% .......... SPX2815ARYYWW..............Adj.................. 3 lead TO-252
SPX2815AR/TR ....................... 1% .......... SPX2815ARYYWW..............Adj.................. 3 lead TO-252
SPX2815AR-2.5....................... 1% .......... SPX2815AR25YYWW...........Adj ................. 3 lead TO-252
SPX2815AR-2.5/TR ................. 1% .......... SPX2815AR25YYWW...........Adj ................. 3 lead TO-252
SPX2815AR-3.3....................... 1% .......... SPX2815AR33YYWW...........Adj ................. 3 lead TO-252
SPX2815AR-3.3/TR ................. 1% .......... SPX2815AR33YYWW...........Adj ................. 3 lead TO-252
SPX2815AR-5.0....................... 1% .......... SPX2815AR50YYWW...........Adj ................. 3 lead TO-252
SPX2815AR-5.0/TR ................. 1% .......... SPX2815AR50YYWW...........Adj ................. 3 lead TO-252
SPX2815AT ............................. 1% ........... SPX2815ATYYWW..............Adj .................. 3 lead TO-263
SPX2815AT/TR ....................... 1% ........... SPX2815ATYYWW..............Adj .................. 3 lead TO-263
SPX2815AT-2.5 ....................... 1% .......... SPX2815AT25YYWW...........Adj ................. 3 lead TO-263
SPX2815AT-2.5/TR ................. 1% .......... SPX2815AT25YYWW...........Adj ................. 3 lead TO-263
SPX2815AT-3.3 ....................... 1% .......... SPX2815AT33YYWW...........Adj ................. 3 lead TO-263
SPX2815AT-3.3/TR ................. 1% .......... SPX2815AT33YYWW...........Adj ................. 3 lead TO-263
SPX2815AT-5.0 ....................... 1% .......... SPX2815AT50YYWW...........Adj ................. 3 lead TO-263
SPX2815AT-5.0/TR ................. 1% .......... SPX2815AT50YYWW...........Adj ................. 3 lead TO-263
SPX2815AU ............................. 1% .......... SPX2815AUYYWW..............Adj.................. 3 lead TO-220
SPX2815AU-2.5....................... 1% .......... SPX2815AU25YYWW...........Adj ................. 3 lead TO-220
SPX2815AU-3.3....................... 1% .......... SPX2815AU33YYWW...........Adj ................. 3 lead TO-220
SPX2815AU-5.0....................... 1% .......... SPX2815AU50YYWW...........Adj ................. 3 lead TO-220
/TR = Tape and Reel
Pack quantity is 500 for TO-263 and 2,000 for
TO-252.
Corporation
ANALOG EXCELLENCE
Sipex Corporation
Headquarters and
Sales Office
233 South Hillview Drive
Milpitas, CA 95035
TEL: (408) 934-7500
FAX: (408) 935-7600
Date: 5/17/04
SPX2815 1.5A Low Dropout Voltage Regulator
© Copyright 2004 Sipex Corporation
9
ORDERING INFORMATION
PART NUMBERS
ACC.
TOP MARK
OUTPUT VOLTAGE
PACKAGE
SPX2815R ............................... 2% ............ SPX2815RYYWW..............Adj ................... 3 lead TO-252
SPX2815R/TR ......................... 2% ............ SPX2815RYYWW..............Adj ................... 3 lead TO-252
SPX2815R-2.5 ......................... 2% ........... SPX2815R25YYWW...........Adj .................. 3 lead TO-252
SPX2815R-2.5/TR ................... 2% ........... SPX2815R25YYWW...........Adj .................. 3 lead TO-252
SPX2815R-3.3 ......................... 2% ........... SPX2815R33YYWW...........Adj .................. 3 lead TO-252
SPX2815R-3.3/TR ................... 2% ........... SPX2815R33YYWW...........Adj .................. 3 lead TO-252
SPX2815R-5.0 ......................... 2% ........... SPX2815R50YYWW...........Adj .................. 3 lead TO-252
SPX2815R-5.0/TR ................... 2% ........... SPX2815R50YYWW...........Adj .................. 3 lead TO-252
SPX2815T................................ 2% ............ SPX2815TYYWW..............Adj ................... 3 lead TO-263
SPX2815T/TR .......................... 2% ............ SPX2815TYYWW..............Adj ................... 3 lead TO-263
SPX2815T-2.5 ......................... 2% ........... SPX2815T25YYWW...........Adj .................. 3 lead TO-263
SPX2815T-2.5/TR.................... 2% ........... SPX2815T25YYWW...........Adj .................. 3 lead TO-263
SPX2815T-3.3 ......................... 2% ........... SPX2815T33YYWW...........Adj .................. 3 lead TO-263
SPX2815T-3.3/TR.................... 2% ........... SPX2815T33YYWW...........Adj .................. 3 lead TO-263
SPX2815T-5.0 ......................... 2% ........... SPX2815T50YYWW...........Adj .................. 3 lead TO-263
SPX2815T-5.0/TR.................... 2% ........... SPX2815T50YYWW...........Adj .................. 3 lead TO-263
SPX2815U ............................... 2% ............ SPX2815UYYWW..............Adj ................... 3 lead TO-220
SPX2815U-2.5 ......................... 2% ........... SPX2815U25YYWW...........Adj .................. 3 lead TO-220
SPX2815U-3.3 ......................... 2% ........... SPX2815U33YYWW...........Adj .................. 3 lead TO-220
SPX2815U-5.0 ......................... 2% ........... SPX2815U50YYWW...........Adj .................. 3 lead TO-220
/TR = Tape and Reel
Pack quantity is 500 for TO-263 and 2,000 for
TO-252.
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: 5/17/04
SPX2815 1.5A Low Dropout Voltage Regulator
© Copyright 2004 Sipex Corporation
10
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