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| (R) SPX1521 300mA Low Dropout Voltage Regulator FEATURES 1% Output Accuracy 3.3V, 5V, at 300mA Output Very Low Quiescent Current 0.3V (Typ.) Dropout Voltage at 300mA Extremely Tight Load and Line Regulation Current & Thermal Limiting Reverse Battery Protection Equivalent Replacement For LT1521 SPX1521 3 Pin TO-263 1 2 3 VOUT GND VIN Now Available in Lead Free Packaging DESCRIPTION The SPX1521 is a low power voltage regulator. This device is an excellent choice for use in battery-powered applications such as cordless telephones, radio control systems, and portable computers. The SPX1521 features very low quiescent current and very low dropout voltage. This includes a tight initial tolerance of 1% max, and very low output temperature coefficient, making the SPX1521 useful as a low-power voltage reference. The SPX1521 is offered in 3 pin TO-252, SOT-223, TO-220 & TO-263 packages. TYPICAL APPLICATIONS CIRCUIT VOUT IIN IN OUT 5V IL SPX1521 0.1F + GND + 2.2F LOAD IIN = IL + IG IG Date: 5/25/04 SPX1521 300mA Low Dropout Voltage Regulator (c)Copyright 2004 Sipex Corporation 1 ABSOLUTE MAXIMUM RATINGS Power Dissipation ........................................................ Internally Limited Lead Temp. (Soldering, 5 Seconds) ............................................. 260C Storage Temperature Range ........................................ -65C to +150C Operating Junction Temperature Range ....................... -40C to +125C Input Supply Voltage ....................................................... -20V to +20V Shutdown Input Voltage ................................................. -0.6V to +6.5V ESD Rating .............................................................................. 2kV Min ELECTRICAL CHARACTERISTICS Electrical characteristics at VIN = 6V, IO = 1mA, COUT = 2.2F, TA= 25C, unless otherwise specified. Boldface applies over the full operating temperature range. PARAMETER 3.3V Version Output Voltage 1mA IL 300mA Reverse Output Current 5.0V Version Output Voltage 1mA IL 300mA Reverse Output Current All Voltage Options Output Voltage Temperature Coefficient Line Regulation Load Regulation (Note 3) Dropout Voltage (Note 5) 20 (Note1) 6V VIN 20V (Note 4) IL=1 to 300mA IL=1mA IL=300mA Ground Current IL=1mA IL=10mA IL=50mA IL=100mA IL=300mA Current Limit Ripple Rejection VOUT=0 VIN -VOUT=1V(Avg), VRIPPLE=0.5Vp-p, FRIPPLE=120Hz, ILOAD=150mA VIN= -20V, VOUT=0V 1.5 4 0.13 0.30 100 350 1.5 2 5 330 58 50 20 20 30 0.17 0.25 0.55 0.70 150 500 3 6 14 500 mV mV V 100 ppm/C VOUT= 5.0V, VIN= 0V 5.0 5.0 16 4.950 4.880 5.050 5.120 25 V A VOUT= 3.3V, VIN= 0V 3.3 3.3 16 3.267 3.217 3.333 3.382 25 V A CONDITIONS (Note 2) TYP MIN MAX UNITS A mA mA dB Input Reverse Leakage Current 1.0 mA Note 1: Output or reference voltage temperature coefficients defined as the worst case voltage change divided by the total temperature range. Note 2: Unless otherwise specified all limits are guaranteed for Tj = 25C, VIN = 6V, IL = 1mA and CL = 2.2F. Note 3: Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to heating effects are covered under the specification for thermal regulation. Note 4: Line regulation for the SPX1521 is tested at 25C for IL = 1 mA. For TJ = 125C, line regulation is guaranteed by design. Note 5: Dropout voltage is defined as the input to output differential at which the output voltage drops 100 mV below its nominal value measured at 1V differential. Date: 5/25/04 SPX1521 300mA Low Dropout Voltage Regulator (c)Copyright 2004 Sipex Corporation 2 APPLICATION INFORMATION External Capacitors The stability of the SPX1521 requires a 2.2F or greater capacitor between output and ground. Oscillation could occur without this capacitor. Most types of tantalum or aluminum electrolytic works fine here. For operations of below -25C solid tantalum is recommended since the many aluminum types have electrolytes that freeze at about -30C. The ESR of about 5 or less and resonant frequency above 500kHz are the most important parameters in the value of the capacitor. The capacitor value can be increased without limit. The SPX1521, unlike other low dropout regulators will remain stable and in regulation with no load in addition to the internal voltage divider. This feature is especially important in applications like CMOS RAM keep-alive. If there is more than 10 inches of wire between the input and the AC filter capacitor, or if a battery is used as the input, then a 0.1F tantalum or aluminum electrolytic capacitor should be placed from the input to the ground. PINOUTS Reducing Output Noise It may be an advantage to reduce the AC noise present at the output. One way is to reduce the regulator bandwidth by increasing the size of the output capacitor. Increasing the capacitor from 1F to 220F only decreases the noise from 430V to 160Vrms for a 100kHz bandwidth at 5V output. SOT-223 (M3) TO-263-3 (T) TO-220-3 (U) TO-252 (R) 3 VIN GND VOUT SPX1521 1 2 3 1 SPX1521 2 3 2 SPX1521 1 2 3 1 VIN GND VOUT Front View VOUT GND VIN Top View Top View VOUT GND VIN Front View Date: 5/25/04 SPX1521 300mA Low Dropout Voltage Regulator (c)Copyright 2004 Sipex Corporation 3 PACKAGE: 3 PIN TO-263 SEATING PLANE A E/2 L1 C2 E 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 SPX1521 300mA Low Dropout Voltage Regulator (c)Copyright 2004 Sipex Corporation 4 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 SPX1521 300mA Low Dropout Voltage Regulator (c)Copyright 2004 Sipex Corporation 5 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 SPX1521 300mA Low Dropout Voltage Regulator (c)Copyright 2004 Sipex Corporation 6 PACKAGE: 3 PIN SOT223 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 SPX1521 300mA Low Dropout Voltage Regulator (c)Copyright 2004 Sipex Corporation 7 ORDERING INFORMATION Part Number SPX1521M3-3.3 SPX1521M3-3.3/TR SPX1521M3-5.0 SPX1521M3-5.0/TR SPX1521R-3.3 SPX1521R-3.3/TR SPX1521R-5.0 SPX1521R-5.0/TR SPX1521T-3.3 SPX1521T-3.3/TR SPX1521T-5.0 SPX1521T-5.0/TR SPX1521U-3.3 SPX1521U-5.0 Accuracy 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% Output Voltage 3.3V 3.3V 5.0V 5.0V 3.3V 3.3V 5.0V 5.0V 3.3V 3.3V 5.0V 5.0V 3.3V 5.0V Packages 3-Pin SOT-223 3-Pin SOT-223 3-Pin SOT-223 3-Pin SOT-223 3-Pin TO-252 3-Pin TO-252 3-Pin TO-252 3-Pin TO-252 3-Pin TO-263 3-Pin TO-263 3-Pin TO-263 3-Pin TO-263 3-Pin TO-220 3-Pin TO-220 Available in lead free packaging. To order add "-L" suffix to part number. Example: SPX1521T-3.3/TR = standard; SPX1521T-L-3.3/TR = lead free /TR = Tape and Reel Pack quantity is 500 for TO-263 2,000 for TO-252 and 2,500 for SOT-223. 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: 5/25/04 SPX1521 300mA Low Dropout Voltage Regulator (c)Copyright 2004 Sipex Corporation 8 |
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