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SPX2815 1.5A Low Dropout Voltage Regulator
FEATURES Guaranteed 1.5A Output Current Three Terminal Adjustable or Fixed 2.5V, 3.3V and 5.0V Low Quiescent Current Low Dropout Voltage of 1.1V @ 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 Similar to Industry Standard LT1086/ LT1586 APPLICATIONS Desktop PCs, Servers Powering VGA and Sound Cards Cordless Phones Battery Chargers Adjustable Power Supplies Portable Instrumentation SMPS Post-Regulator Constant Current Regulators Disk Drives
Refer to Page 5 for Pinouts Now Available in Lead Free Packaging 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. The SPX2815 is offered in several 3-pin surface mount packages: TO-252, TO-220 and TO-263. An output capacitor of 10F ceramic or tantalum provides unconditional stability. FUNCTIONAL DIAGRAM (Adjustable)
VIN
Current Limit
+ VOUT ICL _ AMP + 1.25V
Thermal Limit
+ -
VREF ADJ/GND IADJ ~ 50A -
I TL
Date: 6/21/06 Rev C
SPX2815 1.5A Low Dropout Voltage Regulator
(c) 2006 Sipex Corporation
1
ABSOLUTE MAXIMUM RATINGS
Power Dissipation.......................................Internally Limited Lead Temperature (soldering, 5 seconds) ...............260C Storage Temperature Range.......................-65C to +150C Operating Junction Temperature Range.....-40C to +125C Input Supply Voltage .................................................... +10V Input to Output Voltage ................................................ +8.8V ESD Rating .............................................................. 2kV min
ELECTRICAL CHARACTERISTICS
at VIN=VOUT + 1.5V, TA = 25C, CIN = COUT = 10F, IOUT =10mA, unless otherwise specified. The Boldface applies over the full operating temperature range.
PARAMETER 2.5V Version Output Voltage 3.30V Version Output Voltage 5.0V Version Output Voltage All Voltage Options Reference Voltage Output Voltage Temperature Stability Line Regulation 1.238 1.250 1.225 0.3 0.1 0.1 0.1 0.1 0.1 0.1 1.00 1.10 4 50 2.5 0.01 60 75 0.03 0.003 3 29.3 3 31.4 6 50 0.1 60 0.2 0.2 0.2 0.3 0.3 0.3 1.2 10 120 2.5 0.01 75 0.03 0.003 3 29.3 3 31.4 6 50 0.1 1.262 1.225 1.250 1.275 1.212 0.5 0.1 0.1 0.1 0.1 0.1 0.1 1.00 1.10 4 50 0.2 0.2 0.2 0.3 0.3 0.3 1.2 10 120 mA A A %/W dB % % C/W (VIN-VOUT)=5V 25C, 30mS pulse fRIPPLE=120Hz, (VIN-VOUT)=2V, VRIPPLE=1VPP 125C, 1000Hrs % of VOUT, 10Hzf10kHz TO-220 Junction to Case, at Tab TO-220 Junction to Ambient TO-263 Junction to Case, at Tab TO-263 Junction to Ambient TO-252 Junction to Case, at Tab TO-252 Junction to Ambient 1.275 1.287 V % % 4.25VVIN 10V,VOUT=2.5V,IOUT=10mA 4.75VVIN 10V,VOUT=3.3V,IOUT=10mA 6.50VVIN 10V,VOUT=5.0V,IOUT=10mA 10mAIOUT 1.5A, VOUT=2.5V 10mAIOUT 1.5A, VOUT=3.3V 10mAIOUT 1.5A, VOUT=5.0V IOUT=0.5A IOUT=1.5A Fixed voltage versions IOUT=10mA, (VIN - VOUT )= 2V 10mAIOUT 1.5A, 1.5V(VIN-VOUT) 10V 4.950 5.000 4.900 5.050 4.900 5.000 5.100 4.850 5.100 5.150 V IOUT=10mA, VIN=7V 10mA IOUT 1.5A, 6.50V VIN 10V 3.267 3.300 3.234 3.333 3.234 3.300 3.366 3.201 3.366 3.399 V IOUT = 10mA, VIN =5V 10mA IOUT 1.5A, 4.75V VIN 10V MIN TYP SPX2815A 2.475 2.500 2.450 MAX MIN TYP SPX2815 2.525 2.450 2.500 2.550 2.425 2.550 2.575 V IOUT = 10mA, VIN =4.5V 10mA IOUT 1.5A, 4.25V VIN 10V MAX UNITS CONDITIONS
Load Regulation
%
Dropout Voltage (Note 2) Quiescent Current Adjust Pin Current Current Limit Thermal Regulation Ripple Rejection Long Term Stability RMS Output Noise Thermal Resistance
V
Date: 6/21/06 Rev C
SPX2815 1.5A Low Dropout Voltage Regulator
(c) 2006 Sipex Corporation
2
TYPICAL PERFORMANCE CHARACTERISTICS
1.275
3.325 3.320
1.27 1.265 1.26 1.255 1.25 1.245 1.24 1.235 1.23 1.225 -50
1.25v Adj
Vout (V)
3.315 3.310 3.305 3.300 4.5 6.5 8.5 10.5 Vin (V) 12.5 14.5
Vout (V)
-30
-10
10
30
50
70
90
110
130
Temp (C)
Figure 1. Line Regulation for SPX2815U-3.3; IOUT=10mA
Figure 2. VOUT vs Temperature, VIN=2.5V, IOUT=10mA
2.55 2.54 2.53 2.52 2.51 2.5 2.49 2.48 2.47 2.46 2.45 -50
3.38
2.5v Adj 2.5v Fixed
3.36 3.34
Vout (V)
3.3v Adj 3.3v Fixed
Vout (V)
3.32 3.3 3.28
-30
-10
10
30 50 Temp (C)
70
90
110
130
3.26 -50
-30
-10
10
30
50
70
90
110
130
Temp (C)
Figure 3. VIN=4.0V, IOUT=10mA
Figure 4. VIN=5.0V, IOUT=10mA
APPLICATION INFORMATION
Output Capacitor
To ensure the stability of the SPX2815, an output capacitor of at least 10F (ceramic or tantalum) or 22F (aluminum) is required. The value may change based on the application requirements of the output load or temperature range. The value of Equivalent Series Resistance (ESR) can vary based on the type of capacitor used in the applications to guarantee stability. The recommended value for ESR is 0.5 or less. A larger value of output capacitance (up to 100F) can improve the load transient response.
Soldering Methods
tions. Special care needs to be taken during continuous load conditions such that the maximum junction temperature does not exceed 125C. Thermal protection is activated at >179C and deactiviated at <165C. The thermal interaction from other components in the application can affect the thermal resistance of the SPX2815. The actual thermal resistance can be determined with experimentation. SPX2815 power dissipation is calculated as follows: PD = (VIN - VOUT)(IOUT) Maximum Junction Temperature range: TJ = TA(max) + PD* JA (thermal resistance, junction-to-ambient) Maximum junction temperature must not exceed 125C.
The SPX2815 die is attached to the heatsink lead which exits opposite the input, output, and ground pins.
Thermal Characteristics
The SPX2815 features internal thermal limiting to protect the device during overload condi-
Date: 6/21/06 Rev C
SPX2815 1.5A Low Dropout Voltage Regulator
(c) 2006 Sipex Corporation
3
APPLICATION INFORMATION: Continued
Ripple Rejection
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 22F for an electrolytic aluminum capacitor or 10F for a solid tantalum capacitor (Fig 7). However, the value of the ADJ-bypass capacitor should be chosen with respect to the following equation:
Ripple rejection for the adjustable version is shown in Figure 5.
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 approximated using the formula VOUT=1.25 *(R1 + R2)/R1 A small correction to this formula is required depending on the values of resistors R1 and R2, since the adjustable pin current (approx 50A) flows through R2. When IADJ is taken into account, the formula becomes VOUT = VREF(1+ (R2/R1)) + IADJ * R2 where VREF=1.25V
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. If an ADJ-bypass capacitor is used, 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. VREF =1.25V
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.
0 -10 -20 -30 -40 -50 -60 -70 -80 -90 10 100 1000 10000 100000 1000000 Frequency, Hz
Ripple Rejection, Db
V IN 4.7F + C1
IN
SPX2815
ADJ
OUT C2 R1
VOUT
IOUT =
VREF R1
IOUT LOAD
Figure 5. Ripple Rejection; Vin=3.3V, Vout=1.8V (adj.), Iload=200mA
Figure 6. Current Source
Date: 6/21/06 Rev C
SPX2815 1.5A Low Dropout Voltage Regulator
(c) 2006 Sipex Corporation
4
APPLICATION INFORMATION: Continued
(Note A) V IN
SPX2815
IN OUT
5V
VOUT
R1 330 1% 10F
VIN 4.7F + C1
IN
SPX2815
ADJ I ADJ 50A
OUT C2 VREF R1
VOUT
+ 4.7F
ADJ
VOUT = V REF (1+R 2 /R1 ) +I ADJ R 2
R2
*C 1 improves ripple rejection. ZC should be ~ R1 at ripple frequency
R2 1k, 1%
+
C1 10F*
Note A: VIN(MIN) = (Intended VOUT ) + (V
DROPOUT (MAX) )
Figure 7. Typical Adjustable Regulator
Figure 8. Improving Ripple Rejection
SPX2815
VIN (Note A)
ADJ IN OUT
5V 330W 1% +
R P Parasitic Line Resistance VIN SPX2815 VOUT
+ 4.7F TTL Input 1K 2N3904 1k
ADJ
10F
Connect R to Case of Regulator
1k 1%
R1 Connect R2 to Load RL R2
Note A: VIN(MIN) = (Intended VOUT ) + (V ) DROPOUT (MAX)
Figure 9. 5V Regulator with Shutdown
Figure 10. Recommended Connections for Best Results
PINOUTS
TO-252 (R)
TO-220-3 (U) TO-263-3 (T)
1
2
3 1 2 3
1
2
3
ADJ/GND
V
OUT
V IN ADJ/GND V OUT V IN
Front View
ADJ/GND V OUT V IN
Top View
Front View
Note: Tab is connected to Pin 2 (Vout)
Date: 6/21/06 Rev C SPX2815 1.5A Low Dropout Voltage Regulator (c) 2006 Sipex Corporation
5
PACKAGE: 3 PIN TO-263
E A E/2 L1 C2
Seating Plane
SIDE VIEW
H D Chamfer Optional
1
2
3
c
e See Detail C
b2
b Gauge Plane
FRONT VIEW
L3 A1
Seating Plane
L
DETAIL C
Thermal Pad (L1)
SYMBOL
3 Pin TO-263 JEDEC TO-263 Inches Controlling Dimension
Variation AA Millimeters Conversion Factor: 1 Inch = 25.40 mm MIN NOM MAX 4.06 4.83 0.00 0.25 0.51 0.99 1.14 1.78 0.38 0.74 1.14 1.65 8.38 9.65 6.86 9.65 10.67 6.22 2.54 BSC 14.61 15.88 1.78 2.79 1.68 0.25 BSC 0 8 JL Aug5-05 / Rev A
D1
BACK VIEW
E1
MIN NOM MAX A 0.160 0.190 A1 0.000 0.010 b 0.020 0.039 b2 0.045 0.070 c 0.015 0.029 c2 0.045 0.065 D 0.330 0.380 D1 0.270 E 0.380 0.420 E1 0.245 e .100 BSC H 0.575 0.625 L 0.070 0.110 L1 0.066 L3 .010 BSC O 0 8 SIPEX Pkg Signoff Date/Rev:
Date: 6/21/06 Rev C
SPX2815 1.5A Low Dropout Voltage Regulator
(c) 2006 Sipex Corporation
6
PACKAGE: 3 PIN TO-220
E2
E
Thermal Pad
Q
oP (H1)
D2 D
D1
1
FRONT VIEW
L1
b2
L
BACK VIEW
e1 b E1
e
A
Seating Plane A1
3 Pin TO-220
SYMBOL
JEDEC TO-220
Variation AB Dimensions in Millimeters: Conversion Factor: 1 Inch = 25.40 mm MIN NOM MAX 3.56 4.83 0.51 1.27 2.03 2.79 0.25 0.51 1.02 1.14 1.45 1.78 0.25 0.51 14.22 16.51 8.38 8.89 12.19 12.70 9.65 10.67 6.86 8.89 0.76 2.54 BSC 5.08 BSC 5.84 6.86 12.70 14.73 6.35 3.30 4.06 2.54 3.30 JL Aug4-05 / Rev A
Dimensions in Inches: Controlling Dimension MAX 0.190 0.055 0.115 0.040 0.070 0.024 0.650 0.355 0.507 0.420 0.350 0.030
H1
SIDE VIEW
Chamfer Optional
C
A2
MIN NOM A 0.140 A1 0.020 A2 0.080 b 0.015 0.027 b2 0.045 0.057 c 0.014 D 0.560 D1 0.330 D2 0.480 E 0.380 E1 0.270 E2 e .100 BSC e1 .200 BSC H1 0.230 L 0.500 L1 0.139 P Q 0.100 SIPEX Pkg Signoff Date/Rev:
0.270 0.580 0.250 0.161 0.135
Date: 6/21/06 Rev C
SPX2815 1.5A Low Dropout Voltage Regulator
(c) 2006 Sipex Corporation
7
PACKAGE: 3 PIN TO-252
E b3 L3
E1
D1 D
H
1
2
3
(L1) L4 L5
BACK VIEW
e b2 b 1
FRONT VIEW
Gauge Plane L
SIDE VIEW
A L2 C2 A1
Seating Plane
c
3 Pin TO-252
SYMBOL
JEDEC TO-252
Dimensions in Inches: Controlling Dimension MIN 0.086 0.025 0.030 0.195 0.018 0.018 0.235 0.205 0.250 0.170 MAX 0.094 0.005 0.035 0.045 0.215 0.024 0.035 0.245 0.265 0.410 0.070
A A1 b b2 b3 c c2 D D1 E E1 e H L L1 L2 L3 L4 L5 o o1
NOM 0.240 .090 BSC 0.370 0.055 0.060 .108 REF .020 BSC 0.035 0.045 0 0 SIPEX Pkg Signoff Date/Rev:
0.050 0.040 0.060 10 15
Variation AA Dimensions in Millimeters Conversion Factor: 1 Inch = 25.40 mm MIN NOM MAX 2.18 2.39 0.13 0.64 0.89 0.76 1.14 4.95 5.46 0.46 0.61 0.46 0.89 5.97 6.10 6.22 5.21 6.35 6.73 4.32 2.29 BSC 9.4 10.41 1.4 1.52 1.78 2.74 REF 0.51 BSC 0.89 1.27 1.02 1.14 1.52 0 10 0 15 JL Aug4-05/Rev A
Date: 6/21/06 Rev C
SPX2815 1.5A Low Dropout Voltage Regulator
(c) 2006 Sipex Corporation
8
ORDERING INFORMATION
PART NUMBERS ACC. TOP MARK OUTPUT VOLTAGE SPX2815AR ............................. 1% .......... SPX2815ARYYWW..............Adj .................. SPX2815AR/TR ....................... 1% .......... SPX2815ARYYWW..............Adj .................. SPX2815AR-2-5 ...................... 1% ......... SPX2815AR25YYWW...........2.5V ................ SPX2815AR-2-5/TR ................. 1% ......... SPX2815AR25YYWW...........2.5V ................ SPX2815AR-3-3 ...................... 1% ......... SPX2815AR33YYWW...........3.3V ................ SPX2815AR-3-3/TR ................. 1% ......... SPX2815AR33YYWW...........3.3V ................ SPX2815AR-5-0 ...................... 1% ......... SPX2815AR50YYWW...........5.0V ................ SPX2815AR-5-0/TR ................. 1% ......... SPX2815AR50YYWW...........5.0V ................ SPX2815AT ............................. 1% ........... SPX2815ATYYWW..............Adj .................. SPX2815AT/TR ....................... 1% ........... SPX2815ATYYWW..............Adj .................. SPX2815AT-2-5 ....................... 1% ......... SPX2815AT25YYWW...........2.5V ................ SPX2815AT-2-5/TR ................. 1% ......... SPX2815AT25YYWW...........2.5V ................ SPX2815AT-3-3 ....................... 1% ......... SPX2815AT33YYWW...........3.3V ................ SPX2815AT-3-3/TR ................. 1% ......... SPX2815AT33YYWW...........3.3V ................ SPX2815AT-5-0 ....................... 1% ......... SPX2815AT50YYWW...........5.0V ................ SPX2815AT-5-0/TR ................. 1% ......... SPX2815AT50YYWW...........5.0V ................ SPX2815AU ............................. 1% .......... SPX2815AUYYWW..............Adj .................. SPX2815AU-2-5 ...................... 1% ......... SPX2815AU25YYWW...........2.5V ................ SPX2815AU-3-3 ...................... 1% ......... SPX2815AU33YYWW...........3.3V ................ SPX2815AU-5-0 ...................... 1% ......... SPX2815AU50YYWW...........5.0V ................ PACKAGE 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-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-220 3 lead TO-220 3 lead TO-220 3 lead TO-220
Available in lead free packaging. To order add "-L" suffix to part number.
Example: SPX2815AU-5-0 = standard; SPX2815AU-L -5-0/TR = lead free.
Pack quantity is 500 for TO-263 and 2,000 for TO-252. /TR = Tape and Reel
Sipex Corporation Headquarters and Sales Office 233 South Hillview Drive Milpitas, CA 95035 TEL: (408) 934-7500 FAX: (408) 935-7600
Solved By SipexTM
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: 6/21/06 Rev C SPX2815 1.5A Low Dropout Voltage Regulator (c) 2006 Sipex Corporation
9
ORDERING INFORMATION
SPX2815R ............................... 2% ............ SPX2815RYYWW..............Adj ................... SPX2815R/TR ......................... 2% ............ SPX2815RYYWW..............Adj ................... SPX2815R-2-5 ......................... 2% .......... SPX2815R25YYWW...........2.5V ................. SPX2815R-2-5/TR ................... 2% .......... SPX2815R25YYWW...........2.5V ................. SPX2815R-3-3 ......................... 2% .......... SPX2815R33YYWW...........3.3V ................. SPX2815R-3-3/TR ................... 2% .......... SPX2815R33YYWW...........3.3V ................. SPX2815R-5-0 ......................... 2% .......... SPX2815R50YYWW...........5.0V ................. SPX2815R-5-0/TR ................... 2% .......... SPX2815R50YYWW...........5.0V ................. SPX2815T ................................ 2% ............ SPX2815TYYWW..............Adj ................... SPX2815T/TR .......................... 2% ............ SPX2815TYYWW..............Adj ................... SPX2815T-2-5 ......................... 2% .......... SPX2815T25YYWW...........2.5V ................. SPX2815T-2-5/TR ................... 2% .......... SPX2815T25YYWW...........2.5V ................. SPX2815T-3-3 ......................... 2% .......... SPX2815T33YYWW...........3.3V ................. SPX2815T-3-3/TR ................... 2% .......... SPX2815T33YYWW...........3.3V ................. SPX2815T-5-0 ......................... 2% .......... SPX2815T50YYWW...........5.0V ................. SPX2815T-5-0/TR ................... 2% .......... SPX2815T50YYWW...........5.0V ................. SPX2815U ............................... 2% ............ SPX2815UYYWW..............Adj ................... SPX2815U-2-5 ......................... 2% .......... SPX2815U25YYWW...........2.5V ................. SPX2815U-3-3 ......................... 2% .......... SPX2815U33YYWW...........3.3V ................. SPX2815U-5-0 ......................... 2% .......... SPX2815U50YYWW...........5.0V ................. 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-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-220 3 lead TO-220 3 lead TO-220 3 lead TO-220
Available in lead free packaging. To order add "-L" suffix to part number.
Example: SPX2815U-5-0 = standard; SPX2815U-L -5-0/TR = lead free.
Pack quantity is 500 for TO-263 and 2,000 for TO-252. /TR = Tape and Reel
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: 6/21/06 Rev C SPX2815 1.5A Low Dropout Voltage Regulator (c) 2006 Sipex Corporation
10

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