SPX1432

® SPX1432 1.24V Precision Adjustable Shunt Regulator FEATURES ■ ■ ■ ■ ■ ■ ■ ■ Reference Voltage: 1.24V Initial Accuracy: 0.5% Wide Operating Current, 60µA to 100mA Ultra Low Reference Input Current, 100nA Operating Voltage Range: VREF to 20V 0°C to 105°C Guaranteed Operation SOT-23-3 Package Upgrade to LMV431, TLV431, SC431L ANODE 3 3 SPX1432 1 1 2 2 REF CATHODE Now Available in Lead Free Packaging ■ ■ ■ ■ APPLICATIONS ■ Switching Power Supplies ■ Adjustable Supplies ■ Error Amplifiers Single Supply Amplifier Monitors / VCRs / TVs Personal Computers Voltage References DESCRIPTION The SPX1432 is a three terminal adjustable shunt voltage regulator that provides a highly accurate 1.24V bandgap reference with 0.5% accuracy, eliminating the need for trimming in most power supply designs. Offered in the tiny SOT-23 package, the SPX1432 has an extremely wide operating current range of 60uA to 100mA, and reference input current of only 100nA (typ). The SPX1432 can regulate outputs from VREF to 20V, using two external resistors, and is guaranteed over the extended commercial temperature range of 0°C to 105°C. The combination of the small size, wide output current capability, flexible voltage range, and stable performance over the entire extended commercial temperature range, makes the SPX1432 the ideal candidate a variety of shunt regulator and current source designs in applications such as Portable meters, Instrumentation, and Industrial Process Control. FUNCTIONAL DIAGRAM Cathode (K) Reference (R) + 1.24V Anode (A) Date: 5/6/04 SPX1432 1.24V Precision Adjustable Shunt Regulator © Copyright 2004 Sipex Corporation 1 ABSOLUTE MAXIMUM RATINGS Cathode-Anode Reverse Breakdown VKZ ....................................... 22V Anode-Cathode Forward Current, (25°. ELECTRICAL CHARACTERISTICS Electrical characteristics are guaranted over the full junction temperature range (0°C to 105°C). Ambient temperature must be derated based upon power dissipation and package thermal characteristics. Unless otherwise specified, test conditions are: VKA = VREF and IK = 10mA. PARAMETER Accuracy 0.5% Output Voltage Temperature Deviation Line Regulation Load Regulation Reference Input Current Reference Input Current Temperature Coefficient Minimim Cathode Current for Regulation Off State Leakage VREF VREF VREF VREF IREF IREF IK(MIN) IK(MIN) 2 2 3 2 3 3 2 4 T J = 2 5 °C 0 < TJ < 105°C VKA = 1.25V to 15V IK = 100µA to 100mA TJ = 25°C, R1 = 10KΩ, R2 = ∞ 0 < TJ < 105°C, R1 = 10KΩ, R2 = ∞ T J = 2 5 °C VREF = 0V, VKA = 18V, TJ = 25°C 1.234 SYMBOL FIGURE CONDITIONS MIN TYP SPX1432A 1.240 6 15 10 0.1 0.05 60 0.01 1.246 12 37 30 0.3 0.2 80 500 V mV mV mV µA µA µA nA MAX UNITS PARAMETER Accuracy 1.0% Output Voltage Temperature Deviation Line Regulation Load Regulation Reference Input Current Reference Input Current Temperature Coefficient Minimim Cathode Current for Regulation Off State Leakage SYMBOL FIGURE CONDITIONS MIN TYP SPX1432 MAX UNITS VREF VREF VREF VREF IREF IREF IK(MIN) IK(MIN) 2 2 3 2 3 3 2 4 T J = 2 5 °C 0 < TJ < 105°C VKA = 1.25V to 15V IK = 100µA to 100mA TJ = 25°C, R1 = 10KΩ, R2 = ∞ 0 < TJ < 105°C, R1 = 10KΩ, R2 = ∞ T J = 2 5 °C VREF = 0V, VKA = 18V, TJ = 25°C 1.228 1.240 9 15 10 0.1 0.05 60 0.01 1.252 18 37 30 0.5 0.4 100 500 V mV mV mV µA µA µA nA Date: 5/6/04 SPX1432 1.24V Precision Adjustable Shunt Regulator © Copyright 2004 Sipex Corporation 2 CALCULATION AVERAGE TEMPERATURE COEFICIENT (TC) ppm 0 % 0 mV 0 ∆VREF ∆T -5 5000 0.5 • TC in mV / °C = ∆VREF(mV) ∆TA • TC in % / °C = ( ∆VREF ∆VREF at 25°C ∆TA ) x 100 0 15 30 45 60 75 90 105 • TC in ppm / °C = ( ∆VREF ∆VREF at 25°C ∆TA ) x 106 Junction Temperature (°C) 0.0033mV /°C 0.0027% / °C 27ppm/°C Figure 1. VREF VS Temperature. TEST CIRCUITS VIN VKA = VREF VIN VKA VIN VKA IK (OFF) IREF IK R1 IREF (VREF) R2 IK Figure 2. Test Circuit for VKA = VREF Figure 3. Test Circuit for VKA > VREF Figure 4. Test Circuit for IKOFF TYPICAL PERFORMANCE CHARACTERISTICS 15.0 IREF-Reference Input Current (nA) 200 12.5 10.0 IK Cathode Current (mA) VKA = VREF 25°C 160 7.5 5.0 2.5 0 -2.5 -5.0 -7.5 -10.0 -2 1.24 -1 0 1 2 3 VKA Cathode Voltage (V) 120 80 40 0 -60 -40 -20 0 20 40 60 80 100 120 TA-Ambient Temperature (°C) High Current Operating Characteristics. Date: 5/6/04 Reference Input Current VS Ambient Temperature. © Copyright 2004 Sipex Corporation SPX1432 1.24V Precision Adjustable Shunt Regulator 3 TYPICAL PERFORMANCE CHARACTERISTICS: Continued 1.25 VREF-Reference Voltage (V) 1.25 1.24 1.235 1.23 1.225 1.22 -60 VKA--Cathode Voltage (V) -30 0 30 60 90 120 1.245 1.245 1.24 1.235 0.01 TA-Ambient Temperature (°C) 0.1 1 10 Ik--cathode Current (mA) 100 Reference Voltage VS Ambient Temperature. Reference Voltage Load Regulation. 0 1000.0000 Ikoff Cathode Current (nA) -10 DVREF(mV) 100.0000 10.0000 1.0000 0.1000 0.0100 0.0010 0.0001 -20 -30 -40 0 -50 0 50 100 150 3 6 9 12 15 18 21 Ta Ambient Temperature (C) VKA-Cathode Voltage (V) Reference Voltage Line Regulation. Off State Leakage VS Ambient Temperature. VIN R IK VOUT Ch1-VIN fP = 100kHz 50Ω Ch2-VKA GND Test Circuit for Pulse Response. IKA = 0 to 100µA. Date: 5/6/04 SPX1432 1.24V Precision Adjustable Shunt Regulator © Copyright 2004 Sipex Corporation 4 TYPICAL PERFORMANCE CHARACTERISTICS: Continued IKA = 0 to 300µA. IKA = 0 to 1mA. IKA = 0 to 10mA. IKA = 0 to 50mA. IKA = 0 to 80mA Date: 5/6/04 IKA = 0 to 100mA SPX1432 1.24V Precision Adjustable Shunt Regulator © Copyright 2004 Sipex Corporation 5 PACKAGE: 3 PIN SOT23 D b 3 B B E1 E SEE VIEW C 1 e 2 e1 L L1 Gauge Plane L2 VIEW C 3 PIN SOT-23 JEDEC TO-236 (AB) Variation A A1 A2 b c D e e1 E E1 L L1 Ø 0º 2.10 1.20 0.30 Dimensions in (mm) A MIN 0.89 0.01 0.88 0.30 0.08 2.80 NOM MAX .95 2.90 1.12 0.10 1.02 0.50 0.20 3.04 A A1 A A2 Seating Plane C SIDE VIEW b WITH PLATING 0.95 BSC 1.90 BSC 1.30 0.45 0.54 REF 2.64 1.40 0.60 c BASE METAL 8º 3 PIN SOT-23 Date: 5/6/04 SPX1432 1.24V Precision Adjustable Shunt Regulator © Copyright 2004 Sipex Corporation 6 ORDERING INFORMATION PART NUMBER ACC OUTPUT VOLTAGE TOP MARK SPX1432AM ............ 0.5% .................. 1.24V .......................... W1 ............ SPX1432AM/TR ...... 0.5% .................. 1.24V .......................... W1 ............ SPX1432M ............... 1.0% .................. 1.24V ........................... F2 ............ SPX1432M/TR ......... 1.0% .................. 1.24V ........................... F2 ............ Available in lead free packaging. To order add “-L” suffix to part number. Example: SPX1432AM/TR = standard; SPX1432AM-L/TR = lead free /TR = Tape and Reel Pack quantity is 2500 for SOT-23. PACKAGES 3-Pin SOT-23 3-Pin SOT-23 3-Pin SOT-23 3-Pin SOT-23 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: 5/6/04 SPX1432 1.24V Precision Adjustable Shunt Regulator © Copyright 2004 Sipex Corporation 7