SPX432M-LTR MaxLinear

SPX432 1.24V Precision Adjustable Shunt Regulator Anode FEATURES 3 Low Voltage Operation, 1.24V Trimmed Bandgap to 0.5% and 1% SPX432 3 Pin SOT-23 Wide Operating Current, 1mA to 80mA Adjustable Output Voltage, V to 18V 1 2 REF Ref Cathode Extended Temp.Range: 0C to 105C Now Available in Lead Free Packaging Low Temperature Coefficient, 50 ppm/C Offered in TO-92, SOIC, SOT-23-3 Refer to page 11 for other pinouts. Replacement for TLV431, AS432 APPLICATIONS Single Supply Amplifier Switching Power Supplies Monitors / VCRs / TVs Adjustable Supplies Personal Computers Error Amplifiers Voltage References DESCRIPTION The SPX432 is a 3-terminal adjustable shunt voltage regulator providing a highly accurate 1.24V bandgap reference with 0.5% tolerance. The SPX432s thermal stability, wide operating current (80mA) and temperature range (0C to 105C) makes it suitable for a variety of applications. SPX432 tolerance of 0.5% is proven to be sufficient to overcome all of the other errors in the system to virtually eliminate the need for trimming in the power supply manufactures assembly lines and contribute a significant cost savings. The SPX432 is an ideal voltage reference in an isolated feedback circuit for switch mode power supplies. SPX432 offers many advantages over the TLV431 such as wider output voltage (18V vs. 6V), higher output current (80mA vs. 15mA) and a wider operating temperature range with a tighter tolerance down to 0.5%. BLOCK DIAGRAM Cathode (K) Reference (R) + - 1.24V Anode (A) Date: 12/11/04 SPX432 1.24V Precision Adjustable Shunt Regulator Copyright 2004 Sipex Corporation 1Continuous Power Dissipation at 25C P D ABSOLUTE MAXIMUM RATINGS TO-92 ..................................................................... 775mW Cathode-Anode Reverse Breakdown V ....................................... 20V KA SOT-23 .................................................................. 200 mW Anode-Cathode Forward Current, (<10ms) I ................................. 1A AK SOIC-8 .................................................................... 750mW Operating Cathode Current I .................................................... 80mA KA Junction Temperature T ........................................................... 150 C J Reference Input Current I .......................................................... 1mA REF Storage Temperature T .......................................... -65C to 150 C STG Lead Temperature (Soldering 10 sec.) T .................................. 300C L Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. TYPICAL THERMAL RESISTANCES RECOMMENDED CONDITIONS PARAMETER SYMBOL RATING UNIT PACKAGE 0 0 TYPICAL JA JC DERATING Cathode Voltage V V to 18 V KA REF TO-92 160C/W 80C/W 6.3mW/C Cathode Current I 10 mA K SOT-23 575C/W 150C/W 1.7 mW/C SOIC-8 175C/W 45C/W 5.7mW/C Typical deratings of the thermal resistances are given for ambient temperature >25C. ELECTRICAL CHARACTERISTICS Electrical characteristics are guaranted over the full junction temperature range (0C to 105C). Ambient temperature must be derated based upon power dissipation and package thermal characteristics. Unless otherwise specified, test conditions are: V = V and I = 10mA. KA REF K PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX MIN TYP MAX UNITS CIRCUIT SPX432A SPX432 Output Voltage V 3a 1.2338 1.240 1.2462 1.2276 1.240 1.2524 V REF Temperature Deviation V 3a 0 < T < 105C1220 1220 mV REF J Line Regulation V 3b V = 1.25V to 15V 19 37 19 37 mV REF KA Load Regulation V 3a I = 1mA to 80mA 12 30 12 30 mV REF K Reference Input Current I 3b 3 6 36 A REF Reference Input Current I 3b 0 < T < 105C, 0.3 0.6 0.3 0.6 A REF J Temperature Coefficient Minimim Cathode I 3a 0.6 1 0.6 1 mA K(MIN) Current for Regulation Off State Leakage I 3c V = 0V, 0.04 500 0.04 500 nA K(MIN) REF V = 18V KA Date: 12/11/04 SPX432 1.24V Precision Adjustable Shunt Regulator Copyright 2004 Sipex Corporation 2