SPX2431 Precision Adjustable Shunt Regulator Description FEATURES The SPX2431 is a 3-terminal adjustable shunt voltage regulator Trimmed bandgap to 0.5% and 1.0% providing a highly accurate bandgap reference. The SPX2431 acts as Wide operating current 1mA to 100mA Extended temperature range: 0C to 105C an open-loop error amplifier with a 2.5V temperature compensation Low temperature coefficient: 30 ppm/C reference. The SPX2431s thermal stability, wide operating current Offered in 3 Pin SOT-23 (M) (100mA) and temperature range (0C to 105C) makes it suitable Replacement for TL431, AS2431 for a variety of applications that require a low cost, high performance Low noise output solution. SPX2431A tolerance of 0.5% is proven to be sufficient to overcome all of the other errors in the system to virtually eliminate the APPLICATIONS need for trimming in the power supply manufacturers assembly lines Battery operating equipment and contribute a significant cost savings. Adjustable supplies Switching power supplies The output voltage may be adjusted to any value between V and REF Error amplifiers 20 volts with two external resistors. In the standard shunt configuration, Single supply amplifier the combination of a low temperature coefficient, sharp turn on Monitors / VCRs / TVs characteristics, low output impedance, and programmable output Personal computers voltage makes this precision reference an excellent error amplifier. The SPX2431 is available in a SOT-23-3 package. Ordering Information - Back Page Functional Block Diagram Cathode (K) Reference + (R) - 2.5V Anode (A) Lorem ipsum REV 1A 1/9SPX2431 Absolute Maximum Ratings Recommended Conditions NOTE: Stresses greater than those listed under ABSOLUTE Cathode Voltage V ........................................V to 20V KA REF MAXIMUM RATINGS may cause permanent damage to the Cathode Current I .....................................................10mA K device. This is a stress rating only and functional operation of the device at these or any other conditions above those Typical Thermal Resistances indicated in the operational sections of this specification SOT-23 is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability............................................. 575C/W JA Cathode-Anode Reverse Breakdown V .....................20V .............................................. 150C/W KA JC Anode-Cathode Forward Current, (< 10ms) I ..............1A Typical Derating ......................... 1.7mW/C AK Typical deratings of the thermal resistances are given for ambient temperature Operating Cathode Current I ................................100mA KA >25C. Reference Input Current I ....................................1.0mA REF Continuous Power Dissipation at 25C P D SOT-23 ..........................................200mW Junction Temperature T ............................................150C J Storage Temperature T ..........................-65C to 150C STG Electrical Characteristics Electrical characteristics at 25C, I = 10mA, V = V , unless otherwise specified. K K REF PARAMETERS SYMBOL FIGURE CONDITIONS MIN. TYP. MAX. MIN. TYP. MAX. UNITS SPX2431A SPX2431 2 2.487 2.500 2.513 2.474 2.500 2.526 Reference voltage V V REF 2 T = 0C to 105C 2.480 2.520 2.460 2.540 J V with temp. TC 2 0.07 0.20 0.07 0.20 mV/C REF V to 10V -2.7 -1.01 -2.7 -1.01 V REF REF Ratio of change in V to REF mV/V cathode voltage V K 3 10V to 20V -2.0 -0.4 0.3 -2.0 -0.4 0.3 Reference input current I 3 0.7 4.0 0.7 4.0 A REF I temp deviation I 3 T = 0C to 105C 0.4 1.2 0.4 1.2 A REF REF J Min I for regulation I 2 0.4 1.0 0.4 1.0 mA K K(MIN) V = 0V, REF Off state leakage I 4 0.04 0.04 500 nA K(OFF) V = 20V KA f 1kHz Z Dynamic output impedance Z 2 0.15 0.5 0.15 0.5 KA I = 1 to 100mA K Pin Configuration SOT-23-3 (M) ANODE 3 1 2 REF CATHODE Top View REV 1A 2/9