Solved by SPX1521 TM 300mA Low Dropout Voltage Regulator FEATURES % Output Accuracy 3.3V,5V , at 300mA Output VeryLow Quiescent Current 0.3V (Typ.)Dropout Voltage at300mA Extremely TightLoad and Line Regulation Current& ThermalLimiting Reverse BatteryProtection Equivalent Replacement For LT 52 Available in RoHSCompliant, Lead Free Packages: TO-252, SOT-223, TO-220 & TO-263 DESCRIPTION The SPX 52 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 SPX 52 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 asa low-power voltage reference. The SPX52 is offered in 3pin TO-252, SOT-223, TO-220 & TO-263 packages. TYPICAL APPLICATIONS CIRCUIT I 5V IN V OUT IN OUT I L SPX1521 LOAD + + 2.2F 0.1F GND I I = I + I IN L G G May5-07 SPX 52300mA Low Dropout V oltageRegulator 2007Sipex Corporation ABSOLUTE MAXIMUM RATINGS PowerDissipation ........................................................ InternallyLimited ShutdownInput Voltage ...................................................-0.6Vto +6.5V Lead Temp.(Soldering, 5 Seconds) .............................................. 260C ESDRating ................................................................................2kV Min Storage TemperatureRange .........................................-65Cto + 50C OperatingJunction Temperature Range ......................-40C to+ 25C Input Supply V oltage ................................................... -20V to +20V ELECTRICAL CHARACTERISTICS Electrical characteristics at V = 6V, I =mA, C = 2.2F, T = 25C, unless otherwise specified. IN O OUT A Boldfaceapplies over the fulloperating temperature range. PARAMETER CONDITIONS TYP MIN MAX UNITS (Note 2) 3.3V Version Output Voltage 3.3 3.267 3.333 V mA I 300mA 3.3 3.217 3.382 L ReverseOutput Current V =3.3V , V = 0V 6 25 A OUT IN 5.0V Version Output Voltage 5.0 4.950 5.050 V mA I 300mA 5.0 4.880 5.120 L Reverse Output Current V = 5.0V,V = 0V 6 25 A OUT IN All Voltage Options Output Voltage 20 100 ppm/C Temperature Coefficient (Note1) Line Regulation 6V V 20V (Note 4) 1.5 20 mV IN Load Regulation (Note 3) I =to 300mA 4 20 mV L 30 Dropout Voltage (Note 5) I = mA 0. 3 0.7 V L 0.25 I =300mA 0.30 0.55 L 0.70 GroundCurrent I = mA 100 150 A L I = 0mA 350 500 L I =50mA 1.5 3 mA L I = 00mA 2 6 L I =300mA 5 14 L CurrentLimit V =0 330 500 mA OUT Ripple Rejection V -V =V(A vg), 58 50 dB IN OUT V =0.5Vp-p, RIPPLE F = 20Hz, I =50mA RIPPLE LOAD Input Reverse LeakageCurrent V =-20V , V =0V 1.0 mA IN OUT 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 =25C, V =6V , I = mA and C = 2.2F. j IN L L Note 3: Regulation is measured at constant junctiontemperature, using pulse testing with a low dutycycle. Changes in output voltage due to heating effects are covered under the specification for thermal regulation. Note 4: Lineregulation for the SPX52 is tested at 25C forI = mA. For T = 25C, lineregulation is L J guaranteed by design. Note 5: Dropout voltage is defined as the input to output differential at which the output voltage drops 100 mV below itsnominal value measured at Vdif ferential. May 5-07 SPX 52 300mA Low DropoutV oltage Regulator 2007 SipexCorporation 2