SPX2810 SIPEX | Alldatasheet
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Date: 5/25/04 SPX2810 1A Low Dropout Linear Regulator © Copyright 2004 Sipex Corporation 1A Low Dropout Positive Linear Regulator SPX2810
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 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 10µF or larger, provides unconditionally stability for most applications.
DESCRIPTION
Now Available in Lead Free Packaging TYPICAL APPLICATION CIRCUITS
APPLICATIONS
■ SCSI-II Active Terminator ■ Portable/Palm Top/Notebook Computers ■ Battery Chargers ■ Disk Drives ■ Portable Consumer Equipment ■ Portable Instrumentation ■ SMPS Post-Regulator SPX2810 is 2% Accuracy SPX2810A is 1% Accuracy IN OUT IADJ SPX2810 VOUTVIN VOUT =V REF (1+R 2 /R1) +IADJ R 2 VREF 50µA ADJ 4.7µF + 12 3 SPX2810
3 Pin TO-263
Date: 5/25/04 SPX2810 1A Low Dropout Linear Regulator © Copyright 2004 Sipex Corporation SPX2810A SPX2810 PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS 2.5V Version (Note 2) 2.450 2.550 2.425 2.575 3.0V Version (Note 2) 2.940 3.060 2.790 3.090 3.3V Version (Note 2) 3.234 3.366 3.069 3.399 All Output Options Min Load Current 1.5 ≤(VIN - VOUT)≤5.75V 51 0 1 0 m A (Note 3) TJ=25°C (Note 3) Dropout Voltage I OUT=1A (Note 3) 1.1 1.2 1.1 1.2 V (Note 2) I OUT=1A (Note 2) 1.05 1.15 Current Limit V IN=7V,1.4≤(VIN-VOUT)(Note 3) 1.2 2.0 1.2 A Long Term Stability T A=25°C, 1000Hrs (Note2) 0.03 1.0 1.0 % Thermal Regulation 25 °C, 20mS Pulse 0.01 0.02 0.01 0.02 %/ Ω RMS Output Noise T A=25°C, 10Hz≤f≤10kHz 0.003 0.003 % Thermal Resistance TO-220 Junction to Tab 3.0 3.0 °C/W TO-220 Junction to Ambient 60 60 TO-220 Junction to Tab 3.0 3.0 °C/W TO-220 Juinction to Ambient 60 60 TO-220 Junction to Tab 6 6 °C/W TO-220 Junction to Ambient 126 126 °C/W SOT-223 Junction Tab 15 15 °CW TO-220 Junction to Ambient 156 156 °C/W ABSOLUTE MAXIMUM RATINGS 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. VIN=VOUT + 1.5V, COUT = 10µF, at IOUT = 10mA, TA = 25°C, unless otherwise specified. Limits in Boldface applies over the full operating temperature range. ELECTRICAL CHARACTERISITCS
Date: 5/25/04 SPX2810 1A Low Dropout Linear Regulator © Copyright 2004 Sipex Corporation Output Capacitor To ensure the stability of the SPX1202, an output capacitor of at least 10µF (tantalum or ceramic) or 50µF (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 0.5Ω or less. A larger value of output capacitance (up to 100µF) can improve the load transient response. SOLDERING METHODS The SPX2810 SOT-223 package is designed to be compatible with infrared reflow or vapor- phase reflow soldering techniques. During sol- dering, 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 65°C of the soldering tem- perature 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 125°C. Thermal protection is acti- vated at >144°C and deactiviated at <137°C. 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 sub- strate. Refer to table 1 for the results of the experiment. The thermal interaction from other components in the application can effect the thermal resis- tance of the SPX2810. The actual thermal resis- tance can be determined with experimentation. SPX2810 power dissipation is calculated as follows: P D = (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 nec- essary 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 resis- tance must be taken into account. For example: V IN =10V, VOUT =5V. IOUT =1.5A and TA =50°C/W ThetaJC=3°C/W, thetaSinkCase= 6°C/W thetaSink=0.5°C/W Power dissipation is calculated as P D = (VIN-VOUT )* IOUT =7.5W Junction Temperature will be TJ=T A + PD *(thetaCase-Hs +thetaHs + thetaJc) or Figure 7. Substrate Layout for SOT-223 for thermal
50 X 50mm
35 X 17mm
16 X 10mm
APPLICATION INFORMATION
Figure 8. 600mA Current Source Figure 9. Typical Adjustable Regulator
Date: 5/25/04 SPX2810 1A Low Dropout Linear Regulator © Copyright 2004 Sipex Corporation PACKAGE: PINOUTS 13 2 SOT-223 (M3) Top View TO-263-3 (T) 1 2 3 Front View TO-220-3 (U) 1 23 Front View TO-252 (R) ADJ/GND V OUT 1 23 V IN ADJ/GND V OUT V IN ADJ/GND V OUT VIN ADJ/GND V OUT V IN Top View Current Limit ICL I TL Thermal Limit VREF AMP VOUT VIN ADJ/GND IADJ ~50µA– BLOCK DIAGRAM
Date: 5/25/04 SPX2810 1A Low Dropout Linear Regulator © Copyright 2004 Sipex Corporation PACKAGE: 3 PIN SOT-223 See detail A C c GAUGE PLANE SEATING PLANE H A L C E D e C CN B B b Section C-C - - 1.80 0.02 - 0.10 Dimensions in (mm)3 PIN SOT-223 JEDEC TO-261 (AA) Variation 6.50 6.70 7.00 7.30 A D E e L MIN NOM MAX c 0.23 0.30 0.35 6.30 6.70 ø 0º - 10º A2 1.50 1.60 1.70 0.66 0.76 0.84b b2 2.90 3.00 3.10 3.30 3.50 3.70
2.30 BASIC
e1 4.60 BASIC 0.75 - - c WITH PLATING BASE METAL b Section B-B
3 PIN SOT-223
Date: 5/25/04 SPX2810 1A Low Dropout Linear Regulator © Copyright 2004 Sipex Corporation PACKAGE: 3 PIN TO-252 E1/2 Dimensions in inches3 PIN TO-252 JEDEC TO-252 (AA) Variation .018 - .024c MIN NOM MAX A1 - - .005 D1 .205 - - H L .370 - .410 .170 - - .055 .060 .070 .108 REF .020 BSC c WITH PLATING BASE METAL b CONTACT AREA SEATING PLANEC (L1) L c c GAUGE PLANE O
3 PIN TO-252
Date: 5/25/04 SPX2810 1A Low Dropout Linear Regulator © Copyright 2004 Sipex Corporation PACKAGE: 3 PIN TO-220 B SEATING PLANE A CHAMFER OPTIONAL C A A E øPQ D E2 E/2 L C C D D b c WITH PLATING BASE METAL b CONTACT AREA e .140 - .190 .020 - .055 Dimensions in (mm)
3 PIN TO-220
(AB) Variation .080 - .115 .015 .027 .040 .045 - .070 .480 - .507 A b .380 - .420E MIN NOM MAX c .014 - .024 D .560 - .650 .330 - .355 E1 .270 - .350 E2 - - .030 e .100 BSC e1 .200 BSC H1 .230 - .270 L1 - - .250 L2 - - - ∆P .139 - .161 Q .100 - .135
Date: 5/25/04 SPX2810 1A Low Dropout Linear Regulator © Copyright 2004 Sipex Corporation PACKAGE: 3 PIN TO-263 E D e b .160 - .190 .000 - .010 Dimensions in inches3-PIN TO-263 JEDEC TO-263 (AA) Variation .020 - .039 .015 - .029 .070 - .110 - - A b c D E L MIN NOM MAX e .100 BSC .066- .330 - .380 D1 .270 - - .380 - .420 .245 -- H .575 - .625 .070 L3 .010 BSC 123 c A H SEATING PLANE L 0º-8º See View C E/2 View C GAUGE PLANE SEATING PLANE c WITH PLATING BASE METAL b SECTION B-B B B
Date: 5/25/04 SPX2810 1A Low Dropout Linear Regulator © Copyright 2004 Sipex Corporation
ORDERING INFORMATION
Part Number Accuracy Package Types /TR = Tape and Reel Pack quantity is 500 for TO-263, 2000 for TO-252 and 2500 for SOT-223. 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 Corporation 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 ANALOG EXCELLENCE
Date: 5/25/04 SPX2810 1A Low Dropout Linear Regulator © Copyright 2004 Sipex Corporation Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability aris ing out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor t he rights of others. /TR = Tape and Reel Pack quantity is 500 for TO-263, 2000 for TO-252 and 2500 for SOT-223. Part Number Accuracy Package Types Billerica, MA 01821 TEL: (978) 667-8700 FAX: (978) 670-9001 e-mail: sales@sipex.com 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