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| Solved by SPX1129 TM 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 3 Pin TO-263 SPX1129 3 Pin TO-220 1 2 3 1 2 3 VOUT Note: Tab is Ground GND V for all 4 packages. Available in Lead Free Packaging IN VOUT GND VIN SPX1129 3 Pin SOT-223 APPPLICATIONS Power Supply Communications Equipment Computers and Peripherals 1 2 3 SPX1129 3 TO-252 VIN GND VOUT 2 1 VIN GND 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 VIN IIN IN OUT 5V IL SPX1129 0.1F + GND + LOAD 2.2F IIN= I L+ I G IG Fixed +5V Regulator Circuit.. Mar3-07 SPX29 400 mA Low Dropout Linear Regulator (c) 2007 Sipex Corporation 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 ESD Rating ................................................................................ 2kV Min Thermal Resistance JA TO-263 ............................................................................. 31.4C/W TO-220 ............................................................................. 29.4C/W SOT-223 .......................................................................... 62.3C/W 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 I L 400mA Reverse Output Current 5.0V Version Output Voltage 1mA I L 400mA Reverse Output Current All Voltage Options Output Voltage Temperature Coefficient Line Regulation Load Regulation (Note 3) Dropout Voltage (Note 5) (Note1) 6V V IN 20V (Note 4) IL=1 to 400mA IL=1mA IL=400mA Ground Current IL=1mA IL=10mA IL=50mA IL=100mA IL=400mA Current Limit Ripple Rejection VOUT=0 VIN -VOUT=1V(Avg), VRIPPLE=0.5Vp-p, FRIPPLE=120Hz, ILOAD=400mA, TJ= 25C Input Reverse Leakage Current VIN= -20V, VOUT=0V 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 T j= 25 C, VIN= 6V, I L= 1mA and C L= 2.2 F. 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 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. Mar3-07 SPX29 400 mA Low Dropout Linear Regulator (c) 2007 Sipex Corporation CONDITIONS (Note 2) TYP MIN MAX UNITS 3.3 3.3 16 5.0 5.0 16 20 1.5 6 0.13 0.42 100 350 1.5 2 7 330 58 VOUT= 5.0V, VIN= 0V VOUT= 3.3V, VIN= 0V 3.267 3.217 3.333 3.382 25 V A V A ppm/C mV mV V 4.950 4.880 5.050 5.120 25 100 10 20 30 0.17 0.25 0.55 0.70 200 500 3 6 25 800 A mA mA dB 50 2 APPLICATION INFORMATION External Capacitors The stability of the SPX1129 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 SPX1129, 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. 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 decreases the noise from 430V to 160V rms for a 100kHz bandwidth at 5V output. Mar3-07 SPX29 400 mA Low Dropout Linear Regulator (c) 2007 Sipex Corporation 3 PAckAge: 3 Pin SOT-223 Mar3-07 SPX29 400 mA Low Dropout Linear Regulator (c) 2007 Sipex Corporation 4 PAckAge: 3 Pin TO-252 Mar3-07 SPX29 400 mA Low Dropout Linear Regulator (c) 2007 Sipex Corporation PAckAge: 3 Pin TO-220 Mar3-07 SPX29 400 mA Low Dropout Linear Regulator (c) 2007 Sipex Corporation PAckAge: 3 Pin TO-263 Mar3-07 SPX29 400 mA Low Dropout Linear Regulator (c) 2007 Sipex Corporation 7 ORDeRing inFORMATiOn Part number SPX29M3-3-3 SPX29M3-3-3/TR SPX29M3--0 SPX29M3--0/TR SPX29M3-L-3-3 SPX29M3-L-3-3/TR SPX29M3-L--0 SPX29M3-L--0/TR SPX29R-3-3 SPX29R-3-3/TR SPX29R--0 SPX29R--0/TR SPX29R-L-3-3 SPX29R-L-3-3/TR SPX29R-L--0 SPX29R-L--0/TR SPX29T-3-3 SPX29T-3-3/TR SPX29T--0 SPX29T--0/TR SPX29T-L-3-3 SPX29T-L--0 SPX29U-3-3 SPX29U--0 SPX29U-L-3-3 SPX29U-L--0 Solved by Package RoHS Status code SOT-223-3 OBS SOT-223-3 OBS SOT-223-3 OBS SOT-223-3 OBS SOT-223-3 OBS SOT-223-3 OBS SOT-223-3 OBS SOT-223-3 OBS TO-22 OBS TO-22 OBS TO-22 OBS TO-22 OBS TO-22 OBS TO-22 OBS TO-22 OBS TO-22 OBS TO-23-3 OBS TO-23-3 OBS TO-23-3 OBS TO-23-3 OBS TO-23-3 OBS TO-23-3 OBS TO-220-3 OBS TO-220-3 OBS TO-220-3 OBS TO-220-3 OBS Pack Quantity Bulk 200 Tape & Reel Bulk 200 Tape & Reel Bulk 200 Tape & Reel Bulk 200 Tape & Reel Bulk 2000 Tape & Reel Bulk 2000 Tape & Reel Bulk 2000 Tape & Reel Bulk 2000 Tape & Reel Bulk 00 Tape & Reel Bulk 00 Tape & Reel Bulk Bulk Bulk Bulk Bulk Bulk Sipex corporation TM Headquarters and Sales Office 233 South Hillview Drive Milpitas, CA 903 TEL: (40) 934-700 FAX: (40) 93-700 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. Mar3-07 SPX29 400 mA Low Dropout Linear Regulator (c) 2007 Sipex Corporation |
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