SPX1129 ® 400mA Low Dropout Voltage Regulator FEATURES ■ 1% Output Accuracy 3.3V, 5V, at 500mA Output ■ Very Low Quiescent Current ■ 0.42V Dropout Voltage at 400mA ■ Extremely Tight Load and Line Regulation ■ Current & Thermal Limiting ■ Reverse Battery Protection ■ Equivalent Replacement For LT1129 SPX1129 SPX1129 3 Pin TO-263 1 2 3 Pin TO-220 3 1 VOUT GND 2 3 VIN VOUT GND VIN SPX1129 3 Pin TO-263 SPX1129 3 2 TO-252 1 3 APPPLICATIONS 2 1 ■ Power Supply ■ Communications Equipment ■ Computers and Peripherals VIN GND VIN GND VOUT VOUT Now Available in Lead Free Packaging DESCRIPTION The SPX1129 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 SPX1129 features very low quiescent current and very low dropout voltage of 0.42 volts. This includes a tight initial tolerance of ±1% max, and a very low output temperature coefficient, making the SPX1129 useful as a lowpower voltage reference. The SPX1129 is offered in a SOT-223, TO-220, TO-252 & TO-263 3 lead packages. TYPICAL APPLICATION CIRCUIT IIN VIN OUT IN 5V IL SPX1129 LOAD + + 0.1µF GND 2.2µF IG IIN = IL + IG Fixed +5V Regulator Circuit.. Date: 5/25/04 SPX1129 400mA Low Dropout Voltage Regulator 1 ©Copyright 2004 Sipex Corporation ABSOLUTE MAXIMUM RATINGS Input Supply Voltage ....................................................... -20V to +20V ESD Rating .............................................................................. 2kV Min Power Dissipation ........................................................ Internally Limited Lead Temp. (Soldering, 5 Seconds) ............................................. 260°C Storage Temperature Range ........................................ -65°C to +150°C Operating Junction Temperature Range ....................... -40°C to +125°C ELECTRICAL CHARACTERISTICS Electrical characteristics at VIN = 6V, IO = 1mA, COUT = 2.2µF, TA= 25°C, unless otherwise specified. Boldface applies over the full operating temperature range. PARAMETER CONDITIONS (Note 2) TYP MIN MAX UNITS 3.3 3.3 3.267 3.217 3.333 3.382 V 1mA ≤ IL ≤ 400mA VOUT= 3.3V, VIN= 0V 16 25 µA 5.0 5.0 5.050 5.120 V 1mA ≤ IL ≤ 400mA VOUT= 5.0V, VIN= 0V 16 25 µA 20 100 ppm/°C 1.5 10 mV 6 20 30 mV 0.17 0.25 0.55 0.70 V 3.3V Version Output Voltage Reverse Output Current 5.0V Version Output Voltage Reverse Output Current 4.950 4.880 All Voltage Options Output Voltage Temperature Coefficient (Note1) Line Regulation 6V ≤ VIN ≤ 20V (Note 4) Load Regulation (Note 3) IL=1 to 400mA Dropout Voltage (Note 5) IL=1mA 0.13 IL=400mA 0.42 IL=1mA IL=10mA 100 350 200 500 µA IL=50mA IL=100mA IL=400mA 1.5 2 7 3 6 25 mA Current Limit VOUT=0 330 800 mA Ripple Rejection VIN -VOUT=1V(Avg), VRIPPLE=0.5Vp-p, FRIPPLE=120Hz, ILOAD=400mA, TJ= 25°C 58 Input Reverse Leakage Current VIN= -20V, VOUT=0V Ground Current 50 dB 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 = 25°C, VIN = 6V, IL = 1mA and CL = 2.2µF. 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 SPX1129 is tested at 25°C for IL = 1 mA. For TJ = 125°C, 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 SPX1129 400mA Low Dropout Voltage Regulator 2 ©Copyright 2004 Sipex Corporation APPLICATION INFORMATION External Capacitors The stability of the SPX1129 requires a 2.2µF 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 -25°C solid tantalum is recommended since the many aluminum types have electrolytes that freeze at about -30°C. The ESR of about 5Ω 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. 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 0.1µF tantalum or aluminum electrolytic capacitor should be placed from the input to the ground. 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 1µF to 220µF decreases the noise from 430µV to 160µV rms for a 100kHz bandwidth at 5V output. The SPX1129, unlike other low dropout regulators will remain stable and in regulation with no load in addition to the internal voltage divider. Date: 5/25/04 SPX1129 400mA Low Dropout Voltage Regulator 3 ©Copyright 2004 Sipex Corporation PACKAGE: 3 PIN TO-253 E A K S B H M L W P -A- G N D R TERMINAL 8 C U V DIMENSIONS in inches SYMBOL A B C D E G H K L M N P R S U V W MIN .396 0.326 0.170 0.026 0.045 0.100 REF 0.580 0.055 .000 0.098 .017 .090 0° .095 .30 REF .305 REF MAX 0.406 0.336 0.180 0.036 0.055 0.100 REF 0.620 0.066 .010 0.108 .023 .110 8° .105 .30 REF .305 REF .010 .010 3 Pin TO-263 Date: 5/25/04 SPX1129 400mA Low Dropout Voltage Regulator 4 ©Copyright 2004 Sipex Corporation PACKAGE: 3 PIN TO-220 φP E α (5X) Q D H1 V E-PIN R b1 L e3 C1 J1 DIMENSIONS in inches e e1 SYMBOL A CL F A MIN 0.160 MAX 0.190 b C1 D E 0.025 0.015 0.560 0.385 0.040 0.022 0.590 0.415 e e1 e3 0.090 0.190 0.045 0.110 0.210 0.055 F H1 J1 0.045 0.234 0.090 0.055 0.258 0.115 φP Q 0.146 0.103 0.156 0.113 L α b1 R U V 0.540 0.560 3° typ 0.450 0.243 REF 0.300 REF 0.240 REF 7° typ 0.060 6.170 REF 7.620 REF 6.100 REF 3 Pin TO-220 Date: 5/25/04 SPX1129 400mA Low Dropout Voltage Regulator 5 ©Copyright 2004 Sipex Corporation PACKAGE: 3 PIN TO-252 GAUGE PLANE L2 c C c L O SEATING PLANE A1 (L1) b E1 WITH PLATING E1/2 c D1 BASE METAL CONTACT AREA 3 PIN TO-252 JEDEC TO-252 (AA) Variation MIN A1 - c .018 D1 E1 Date: 5/25/04 Dimensions in inches NOM MAX - .205 .170 H .370 L .055 .005 - .024 - - - - .410 .060 .070 L1 .108 REF L2 .020 BSC 3 PIN TO-252 SPX1129 400mA Low Dropout Voltage Regulator 6 ©Copyright 2004 Sipex Corporation PACKAGE: 3 PIN SOT-223 C D C b2 C N E See detail A E1 A A1 H 1 B B GAUGE PLANE e b SEATING PLANE L 0 C 3 PIN SOT-223 JEDEC TO-261 (AA) Variation A A1 0.02 - 1.80 - 0.10 1.50 1.60 1.70 0.66 0.76 0.84 b2 2.90 3.00 3.10 c 0.23 0.30 0.35 D 6.30 6.50 6.70 E 6.70 7.00 7.30 E1 3.30 3.50 3.70 e 2.30 BASIC e1 4.60 BASIC 0.75 0º WITH PLATING NOM MAX A2 L Date: 5/25/04 MIN b ø b Dimensions in (mm) - c Section B-B BASE METAL c b2 Section C-C - 10º 3 PIN SOT-223 SPX1129 400mA Low Dropout Voltage Regulator 7 ©Copyright 2004 Sipex Corporation ORDERING INFORMATION PART NUMBER ACCURACY SPX1129M3-3.3 ................ 1% SPX1129M3-3.3/TR ........... 1% SPX1129M3-5.0 ................ 1% SPX1129M3-5.0/TR ........... 1% SPX1129R-3.3 ................... 1% SPX1129R-3.3/TR ............. 1% SPX1129R-5.0 ................... 1% SPX1129R-5.0/TR ............. 1% SPX1129T3-3.3 ................. 1% SPX1129T3-3.3/TR ........... 1% SPX1129T3-5.0 ................. 1% SPX1129T3-5.0/TR ........... 1% SPX1129U-3.3 ................... 1% SPX1129U-5.0 ................... 1% TEMPERATURE OUTPUT VOLTAGE ........................ -40°C to 125°C ........................ -40°C to 125°C ........................ -40°C to 125°C ........................ -40°C to 125°C ........................ -40°C to 125°C ........................ -40°C to 125°C ........................ -40°C to 125°C ........................ -40°C to 125°C ........................ -40°C to 125°C ........................ -40°C to 125°C ........................ -40°C to 125°C ........................ -40°C to 125°C ........................ -40°C to 125°C ........................ -40°C to 125°C ................... ................... ................... ................... ................... ................... ................... ................... ................... ................... ................... ................... ................... ................... 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: SPX1129T3-5.0/TR = standard; SPX1129T3-L-5.0/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 SPX1129 400mA Low Dropout Voltage Regulator 8 ©Copyright 2004 Sipex Corporation