View SPX2810_46596.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

(R)
SPX2810
1A Low Dropout Positive Linear Regulator
FEATURES Guaranteed 1A Output Three Terminal Adjustable or Fixed 2.5V, 3.0V and 3.3V Low Quiescent Current Low Dropout Voltage of 1.1V at Full Load 0.2% Line and 0.3% Load Regulation Voltage Temperature Stability 0.25% Overcurrent and Thermal Protection Available Packages: SOT-223,TO-252, TO-220, and TO-263 APPLICATIONS SCSI-II Active Terminator Portable/Palm Top/Notebook Computers Battery Chargers
SPX2810
3 Pin TO-263
1
2
3
ADJ/GND VOUT VIN
Now Available in Lead Free Packaging
SPX2810 is 2% Accuracy SPX2810A is 1% Accuracy Disk Drives Portable Consumer Equipment Portable Instrumentation SMPS Post-Regulator DESCRIPTION
The SPX2810 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 SPX2810 has a very low quiescent current and a low dropout voltage of 1.1V at full load. As output current decreases, quiescent current flows into the load, increasing efficiency. SPX2810 is available in adjustable or fixed 2.5V, 3.0V and 3.3V output voltages. The SPX2810 is offered in several industry standard 3-pin surface mount packages: SOT-223, TO-252, TO-220 and TO-263. An output capacitor of 10F or larger, provides unconditionally stability for most applications. TYPICAL APPLICATION CIRCUITS
VIN 4.7F + C1
IN
SPX2810
ADJ I ADJ 50A
OUT C2 VREF R1
VOUT
VOUT = V REF (1+R 2 /R1 ) +I ADJ R 2
R2
Date: 5/25/04
SPX2810 1A Low Dropout Linear Regulator
(c) Copyright 2004 Sipex Corporation
1
ABSOLUTE MAXIMUM RATINGS
Lead Temperature (soldering, 5 seconds) .................. 300C Storage Temperature Range ...................... -65C to +150C Operating Junction Temperature Range ..... -40C to +125C Input Supply Voltage ..................................................... +10V
ELECTRICAL CHARACTERISITCS
VIN=VOUT + 1.5V, COUT = 10F, at IOUT = 10mA, TA = 25C, unless otherwise specified. Limits in Boldface applies over the full operating temperature range.
SPX2810A PARAMETER 2.5V Version Output Voltage (Note 2) 3.0V Version Output Voltage (Note 2) 3.3V Version Output Voltage (Note 2) All Output Options Reference Voltage Min Load Current (Note 3) Line Regulation Load Regulation Dropout Voltage (Note 2) Current Limit Long Term Stability Thermal Regulation RMS Output Noise Thermal Resistance IOUT=10mA, VIN = VOUT +3V 10IOUT 1A, 1.5V(VIN-VOUT) 5.75V 1.5(VIN - VOUT)5.75V 2.75VIN 7V, IOUT=TJ=25C (Note 2) (VIN - VOUT)=3.0V, 10mAIOUT 1A, TJ=25C (Note 3) IOUT=1A (Note 3) IOUT=1A (Note 2) VIN=7V,1.4(VIN-VOUT)(Note 3) TA=25C, 1000Hrs (Note2) 25C, 20mS Pulse TA=25C, 10Hzf10kHz TO-220 Junction to Tab TO-220 Junction to Ambient TO-220 Junction to Tab TO-220 Juinction to Ambient TO-220 Junction to Tab TO-220 Junction to Ambient SOT-223 Junction Tab TO-220 Junction to Ambient 0.01 0.003 3.0 60 3.0 60 6 126 15 156 1.2 1.238 1.225 1.250 5 0.005 0.05 1.1 1.05 2.0 0.03 0.02 1.0 0.01 0.003 3.0 60 3.0 60 6 126 15 156 1.263 1.281 10 0.2 0.3 1.2 1.15 0.005 0.05 1.1 1.2 1.0 0.02 1.225 1.212 1.250 1.275 1.288 10 0.2 0.2 1.2 V mA % % V A % %/ % C/W C/W C/W C/W CW C/W 0 IOUT = 1A, 4.8V VIN 10V 3.267 3.234 3.300 3.333 3.366 3.234 3.069 3.300 3.366 3.399 V 0 IOUT = 1A, 4.5V VIN 10V 2.970 2.940 3.000 3.030 3.060 2.940 2.790 3.000 3.060 3.090 V 0 IOUT = 1A, 4.0V VIN 10V 2.475 2.450 2.500 2.525 2.550 2.450 2.425 2.500 2.550 2.575 V CONDITIONS MIN TYP MAX MIN SPX2810 TYP MAX UNITS
NOTES: Note 1: Output temperature coefficient is defined as the worst case voltage change divided by the total temperature range. Note 2: Dropout voltage is defined as the input to output differential at which the output voltage drops 100mV below its nominal value measured at 1V differential at very low values of programmed output voltage, the minimum input supply voltage of 2V ( 2.3V over temperature) must be taken into account. Note 3: Thermal regulation is defined as the change in output voltage at a time T after a change in power dissipation is applied excluding load or line regulation effect.
Date: 5/25/04
SPX2810 1A Low Dropout Linear Regulator
(c) Copyright 2004 Sipex Corporation
2
TYPICAL PERFORMANCE CHARACTERISTICS
3.320 3.315 3.310 3.305 3.300 3.295 3.290 3.285 3.280 10 100 Output Current (A) 1000
Line Regulation at 25C
Output Voltage (V)
3.330
Series 1 Series 2
Vout (V)
3.320 3.310 3.300 4.8 9.8 Vin (V) 14.8
Figure 1. Load Regulation for SPX2810M3-3.3; VIN=4.8V, COUT=2.2F
Figure 2. Line Regulation for SPX2810M3--3.3; VIN=4.8V, COUT=2.2F
Current Limit VS Temp
Dropout Voltage (V)
Current Limit (A)
1.3 1.2 1.1 1.0 0.9 100 200 300 400 500 600 700 800 900 1000 Output Current (mA)
2.00 1.50 1.00 0.50 0.00 -50
Series 1 Series 2
-25
0
25
50
75
100 125
Temp (C)
Figure 3. Dropout Voltage vs Output Current for SPX2810M3-3.3; VIN=4.89V, COUT=10F
Figure 4. Current Limit for SP1202M3-3.3; VIN=4.8V, CIN=COUT=1.0F, IOUT pulsed from 10mA to Current Limit
Output Devation (mV)
100 0
125C 22F
-100 15
Indicating Current Limit Starts
Output Current (A)
10 0.5 0 VI = 4.0V VI =3.3V Fixed 1O=10mA CI =1F Ten Cap COUT=2.2F Ten Cap
N N N
0
0.1
0.2
0.3
0.4 0.5 0.6 Time (ms)
0.7
0.8 0.9
1.0
Figure 5. Current Limit for SPX2810M3-3.3, Output Voltage Deviation, (IOUT pulsed from 10mA to 1A).
Date: 5/25/04
SPX2810 1A Low Dropout Linear Regulator
(c) Copyright 2004 Sipex Corporation
3
APPLICATION INFORMATION Output Capacitor To ensure the stability of the SPX1202, an output capacitor of at least 10F (tantalum or ceramic) or 50F (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. 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 The SPX2810 SOT-223 package is designed to be compatible with infrared reflow or vaporphase reflow soldering techniques. During soldering, the non-active or mildly active fluxes may be used. The SPX2810 die is attached to the heatsink lead which exits opposite the input, output, and ground pins. Hand soldering and wave soldering should be avoided since these methods can cause damage to the device with excessive thermal gradients on the package. The SOT-223 recommended soldering method are as follows: vapor phase reflow and infrared reflow with the component preheated to within 65C of the soldering temperature range. THERMAL CHARACTERISTICS The thermal resistance of SPX2810 depends on type of package and PC board layout as shown in Table 1. The SPX2810 features the internal thermal limiting to protect the device during overload conditions. 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 >144C and deactiviated at <137C. Taking the FR-4 printed circuit board and 1/16 thick with 1 ounce copper foil as an experiment, the PCB material is effective at transmitting heat with the tab attached to the pad area and a ground plane layer on the backside of the substrate. Refer to table 1 for the results of the experiment.
50 X 50mm
35 X 17mm
16 X 10mm
Figure 7. Substrate Layout for SOT-223 for thermal experiment.
The thermal interaction from other components in the application can effect the thermal resistance of the SPX2810. The actual thermal resistance can be determined with experimentation. SPX2810 power dissipation is calculated as follows: PD = (VIN - VOUT)(IOUT) Maximum Junction Temperature range: TJ = TAMBIENT (max) + PD* (Junction to ambient Thermal Resistance) Although the SPX2810 offers some limiting circuitry for overload conditions, it is still necessary to insure that maximum junction tepmerature is not exceeded. Heat will flow through the lowest resistance path, in this case the junction to case. Therfore proper mounting of the regulator to the board is critical. The case of the device is electrically connected to the output. If the case must be electrically isolated, a thermal nonconductive spacer should be used between the case and the board. It thermal resistance must be taken into account. For example: VIN =10V, VOUT =5V. IOUT =1.5A and TA =50C/W ThetaJC=3C/W, thetaSinkCase= 6C/W thetaSink=0.5C/W Power dissipation is calculated as PD= (VIN-VOUT)* IOUT=7.5W Junction Temperature will be TJ=TA + PD*(thetaCase-Hs +thetaHs + thetaJc) or TJ = 50 + 7.5(0.5+6+3) = 121.25C
(c) Copyright 2004 Sipex Corporation
Date: 5/25/04
SPX2810 1A Low Dropout Linear Regulator
4
Ripple Rejection 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. If the ADJ pin is not bypassed, the value of the output capacitor can be lowered to 10(F for an electrolytic aluminum capacitor or 2.2F for a solid tantalum capacitor (Fig 10). However the value of the ADJ-bypass capacitor should be chosen with respectto the following equation: 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
PC BOARD AREA mm2 TOPSIDE COPPER AREA mm2
If an ADJ-bypass capacitor is used, the amplitude of the output ripple will be independent of the output voltage. If an ADJbypass 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
BACKSIDE COPPER AREA mm2
THERMAL RESISTANCE JUNCTION TO AMBIENT C/W
2500 2500 2500 2500 2500 1600 2500 2500 1600 900 900
2500 1250 950 2500 1800 600 1250 915 600 240 240
2500 2500 2500 0 0 1600 0 0 0 900 0
46 47 49 51 53 55 58 59 67 72 85 TYPICAL APPLICATION CIRCUITS
V IN 4.7F + C1
IN
SPX2810
ADJ
VIN
OUT C2 R1
IN 4.7F + C1
SPX2810
ADJ I ADJ 50A
OUT C2 VREF R1
VOUT
IOUT =
VREF R1
IOUT LOAD
VOUT = V REF (1+R 2 /R1 ) +I ADJ R 2
R2
Figure 8. 600mA Current Source
Date: 5/25/04
Figure 9. Typical Adjustable Regulator
SPX2810 1A Low Dropout Linear Regulator (c) Copyright 2004 Sipex Corporation
5
(Note A) V IN + 4.7F
SPX2810
IN OUT
SPX2810
5V
VOUT
R1 1k, 1% 10F
V IN (Note A) + 4.7F TTL Input 1k
IN ADJ
OUT
5V k 1 1% + 10F
ADJ
*C 1 improves ripple rejection. ZC should be ~ R1 at ripple frequency
R2 330 1%
2N3904 1k
+
C1 10F*
330 1%
Note A: VIN(MIN) = (Intended VOUT ) + (V
DROPOUT (MAX) )
Note A: VIN(MIN) = (Intended VOUT ) + (V ) DROPOUT (MAX)
Figure 10. Improving Ripple Rejection
Figure 11. 12.5V Regulator with Shutdown
Output Voltage The output of the adjustable regulator can be set to any voltage between 1.25V and 10V. The value of VOUT can be quickly approximated using the formula (Figure 9) VOUT=1.25 *(R1 + R2)/R1. A small correction to this formula is required depending on the values of resistors R1 and R2, since 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.
Layout Considerations Parasitic line resistance can degrade load regulation. In order not to affect the behavior of the regulator, it is best to connect R1 to the case as illustrated in Figure 11. For the same reason, R2 should be connected to the negative side of the load.
R P Parasitic Line Resistance V IN SPX2810 Connect R 1 to Case of Regulator ADJ V OUT
R1
RL R2 Connect R 2 to Load
Figure 12. Recommended Connections for Best Results
Date: 5/25/04
SPX2810 1A Low Dropout Linear Regulator
(c) Copyright 2004 Sipex Corporation
6
PACKAGE: PINOUTS
SOT-223 (M3)
TO-252 (R)
TO-220-3 (U)
TO-263-3 (T)
1 ADJ/GND
2
3
1
2
3 1 2 3
1
2
3
V OUT
V IN ADJ/GND V
OUT
Top View
V IN ADJ/GND V OUT V IN
Front View
ADJ/GND V OUT V IN
Top View
Front View
BLOCK DIAGRAM
VIN
Current Limit
+ VOUT ICL AMP
Thermal Limit
VREF
ADJ/GND I TL IADJ ~50A -
Date: 5/25/04
SPX2810 1A Low Dropout Linear Regulator
(c) Copyright 2004 Sipex Corporation
7
PACKAGE: 3 PIN SOT-223
C D C N C b2
E E1
See detail A
A A1 1 B e b B GAUGE PLANE SEATING PLANE L 0 C H
3 PIN SOT-223 JEDEC TO-261 (AA) Variation A A1 A2 b b2 c D E E1 e e1 L o
Dimensions in (mm) MIN 0.02 1.50 0.66 2.90 0.23 6.30 6.70 3.30 NOM MAX 1.60 0.76 3.00 0.30 6.50 7.00 3.50 1.80 0.10 1.70 0.84 3.10 0.35 6.70 7.30 3.70
c
b
WITH PLATING
c
BASE METAL
Section B-B
2.30 BASIC 4.60 BASIC 0.75 0 10
b2
Section C-C
3 PIN SOT-223
Date: 5/25/04
SPX2810 1A Low Dropout Linear Regulator
(c) Copyright 2004 Sipex Corporation
8
PACKAGE: 3 PIN TO-252
GAUGE PLANE L2
c c L (L1)
b
C A1
SEATING PLANE
O
E1 E1/2
WITH PLATING
c
D1
BASE METAL CONTACT AREA
3 PIN TO-252 JEDEC TO-252 (AA) Variation A1 c D1 E1 H L L1 L2
Dimensions in inches MIN .018 .205 .170 .370 .055 NOM MAX .060 .005 .024 .410 .070
.108 REF .020 BSC
3 PIN TO-252
Date: 5/25/04
SPX2810 1A Low Dropout Linear Regulator
(c) Copyright 2004 Sipex Corporation
9
PACKAGE: 3 PIN TO-220
E
B
A
E2
E/2
A SEATING PLANE
Q
oP
A1
H1
D
D1 L1
1
CHAMFER OPTIONAL
CC
D
D L
e
e1
b
C A2
A
Dimensions in (mm) A A1 A2 b b2 c D D1 D2 E E1 E2 e e1 H1 L1 L2 P Q
3 PIN TO-220 JEDEC TO-220 (AB) Variation
MIN NOM MAX
.140 .020 .080 .015 .045 .014 .560 .330 .480 .380 .270 -
.027 -
.190 .055 .115 .040 .070 .024 .650 .355 .507 .420 .350 .030
b
WITH PLATING
c
BASE METAL CONTACT AREA
.100 BSC .200 BSC .230 .139 .100 .270 .250 .161 .135
3 PIN TO-220
Date: 5/25/04
SPX2810 1A Low Dropout Linear Regulator
(c) Copyright 2004 Sipex Corporation
10
PACKAGE: 3 PIN TO-263
E E/2 L1
SEATING PLANE A C2
D
H
1
2
3 B B c
e See View C
b2
b GAUGE PLANE 0-8 A1 View C SEATING PLANE
L
3-PIN TO-263 JEDEC TO-263 (AA) Variation A A1 b c D D1 E E1 e H L L1 L2 L3 .575 .070 Dimensions in inches MIN .160 .000 .020 .015 .330 .270 .380 .245 .100 BSC .625 .110 .066 .070 NOM MAX .190 .010 .039 .029 .380 .420 -
b
WITH PLATING
c
BASE METAL SECTION B-B
.010 BSC
3 PIN TO-263
Date: 5/25/04
SPX2810 1A Low Dropout Linear Regulator
(c) Copyright 2004 Sipex Corporation
11
ORDERING INFORMATION
Part Number Accuracy 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% Package Types
SPX2810AM3 ............................................... SPX2810AM3/TR ........................................ SPX2810AM3-2.5 ........................................ SPX2810AM3-2.5/TR ................................. SPX2810AM3-3.0 ........................................ SPX2810AM3-3.0/TR ................................. SPX2810AM3-3.3 ........................................ SPX2810AM3-3.3/TR ................................. SPX2810AR .................................................. SPX2810AR/TR ........................................... SPX2810AR-2.5 ........................................... SPX2810AR-2.5/TR .................................... SPX2810AR-3.0 ........................................... SPX2810AR-3.0/TR .................................... SPX2810AR-3.3 ........................................... SPX2810AR-3.3/TR .................................... SPX2810AT .................................................. SPX2810AT/TR ............................................ SPX2810AT-2.5 ........................................... SPX2810AT-2.5/TR ..................................... SPX2810AT-3.0 ........................................... SPX2810AT-3.0/TR ..................................... SPX2810AT-3.3 ........................................... SPX2810AT-3.3/TR ..................................... SPX2810AU .................................................. SPX2810AU-2.5 ........................................... SPX2810AU-3.0 ........................................... SPX2810AU-3.3 ...........................................
.............................................................. 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-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 TO220 .................................................................. 3 lead TO220 .................................................................. 3 lead TO220 .................................................................. 3 lead TO220
Available in lead free packaging. To order add "-L" suffix to part number. Example: SPX2810AM-3.3/TR = standard; SPX2810AM-L-3.3/TR = lead free /TR = Tape and Reel Pack quantity is 500 for TO-263, 2000 for TO-252 and 2500 for SOT-223.
Corporation
ANALOG EXCELLENCE
Sipex Corporation Headquarters and Sales Office 22 Linnell Circle Billerica, MA 01821 TEL: (978) 667-8700 FAX: (978) 670-9001 e-mail: sales@sipex.com
Date: 5/25/04
SPX2810 1A Low Dropout Linear Regulator
(c) Copyright 2004 Sipex Corporation
12
ORDERING INFORMATION
Part Number Accuracy 2% 2% 2% 2% 2% 2% 2% 2% 2% 2% 2% 2% 2% 2% 2% 2% 2% 2% 2% 2% 2% 2% 2% 2% 2% 2% 2% 2% Package Types
SPX2810M3 .................................................. SPX2810M3/TR ........................................... SPX2810M3-2.5 ........................................... SPX2810M3-2.5/TR .................................... SPX2810M3-3.0 ........................................... SPX2810M3-3.0/TR .................................... SPX2810M3-3.3 ........................................... SPX2810M3-3.3/TR .................................... SPX2810R ..................................................... SPX2810R ..................................................... SPX2810R-2.5 ............................................. SPX2810R-2.5/TR ....................................... SPX2810R-3.0 ............................................. SPX2810R-3.0/TR ....................................... SPX2810R-3.3 ............................................. SPX2810R-3.3/TR ....................................... SPX2810T ..................................................... SPX2810T/TR .............................................. SPX2810T-2.5 .............................................. SPX2810T-2.5/TR ....................................... SPX2810T-3.0 .............................................. SPX2810T-3.0/TR ....................................... SPX2810T-3.3 .............................................. SPX2810T-3.3/TR ....................................... SPX2810U ..................................................... SPX2810U-2.5 ............................................. SPX2810U-3.0 ............................................. SPX2810U-3.3 .............................................
.............................................................. 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-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 TO220 .................................................................. 3 lead TO220 .................................................................. 3 lead TO220 .................................................................. 3 lead TO220
Available in lead free packaging. To order add "-L" suffix to part number. Example: SPX2810AM-3.3/TR = standard; SPX2810AM-L-3.3/TR = lead free /TR = Tape and Reel Pack quantity is 500 for TO-263, 2000 for TO-252 and 2500 for SOT-223.
Corporation
ANALOG EXCELLENCE
Sipex Corporation Headquarters and Sales Office 22 Linnell Circle Billerica, MA 01821 TEL: (978) 667-8700 FAX: (978) 670-9001 e-mail: sales@sipex.com 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
SPX2810 1A Low Dropout Linear Regulator
(c) Copyright 2004 Sipex Corporation
13

▲Up To Search▲

Price & Availability of SPX2810

	To Download SPX2810 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .