SPX1432 ® 1.24V Precision Adjustable Shunt Regulator FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ANODE 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 3 3 SPX1432 1 2 1 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 1 © Copyright 2004 Sipex Corporation ABSOLUTE MAXIMUM RATINGS Cathode-Anode Reverse Breakdown VKZ ....................................... 22V Anode-Cathode Forward Current, (<10ms) IAK ................................. 1A Operating Cathode Current IKA .................................................. 120mA Reference Input Current IREF .......................................................... 1mA Continuos Power Dissipation at 25°C PD SOT-23 .................................................................. 200 mW Junction Temperature TJ ........................................................... 150 °C Storage Temperature TSTG .............................................. -65 to 150 °C Lead Temperature (Soldering 10 sec.) TL .................................. 300°C 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 Cathode Voltage VKA VREF to 20 V Cathode Current IK 10 mA PACKAGE SOT-23 θJA θJC 575°C/W 150°C/W TYPICAL DERATING 1.7 mW/°C Typical deratings of the thermal resistances are given for ambient temperature >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 SYMBOL FIGURE CONDITIONS MIN Accuracy 0.5% Output Voltage TYP MAX UNITS 1.240 1.246 V mV SPX1432A VREF 2 TJ = 25°C Temperature Deviation VREF 2 0 < TJ < 105°C 6 12 Line Regulation VREF 3 VKA = 1.25V to 15V 15 37 mV Load Regulation VREF 2 IK = 100µA to 100mA 10 30 mV Reference Input Current IREF 3 TJ = 25°C, R1 = 10KΩ, R2 = ∞ 0.1 0.3 µA Reference Input Current Temperature Coefficient IREF 3 0 < TJ < 105°C, R1 = 10KΩ, R2 = ∞ 0.05 0.2 µA Minimim Cathode Current for Regulation IK(MIN) 2 TJ = 25°C 60 80 µA Off State Leakage IK(MIN) 4 VREF = 0V, VKA = 18V, TJ = 25°C 0.01 500 nA TYP MAX UNITS PARAMETER SYMBOL FIGURE CONDITIONS 1.234 MIN Accuracy 1.0% SPX1432 Output Voltage VREF 2 TJ = 25°C Temperature Deviation VREF 2 0 < TJ < 105°C Line Regulation VREF 3 VKA = 1.25V to 15V 15 37 mV Load Regulation VREF 2 IK = 100µA to 100mA 10 30 mV Reference Input Current IREF 3 TJ = 25°C, R1 = 10KΩ, R2 = ∞ 0.1 0.5 µA Reference Input Current Temperature Coefficient IREF 3 0 < TJ < 105°C, R1 = 10KΩ, R2 = ∞ 0.05 0.4 µA Minimim Cathode Current for Regulation IK(MIN) 2 TJ = 25°C 60 100 µA Off State Leakage IK(MIN) 4 VREF = 0V, VKA = 18V, TJ = 25°C 0.01 500 nA Date: 5/6/04 SPX1432 1.24V Precision Adjustable Shunt Regulator 2 1.228 1.240 1.252 V 9 18 mV © Copyright 2004 Sipex Corporation CALCULATION AVERAGE TEMPERATURE COEFICIENT (TC) ppm 0 % mV 0 0 ∆VREF(mV) ∆TA • TC in mV / °C = ∆VREF ∆T • TC in % / °C = -5 5000 ( ∆VREF ∆VREF at 25°C 15 30 45 60 75 90 • TC in ppm / °C = 105 x 100 ∆TA 0.5 0 ) ( ∆VREF ∆VREF at 25°C ) x 106 ∆TA Junction Temperature (°C) 0.0033mV /°C 0.0027% / °C 27ppm/°C Figure 1. VREF VS Temperature. TEST CIRCUITS VIN VIN VKA = VREF VKA VIN VKA IK (OFF) IREF R1 IK IREF IK (VREF) R2 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 IK Cathode Current (mA) 10.0 200 VKA = VREF 25°C IREF-Reference Input Current (nA) 12.5 7.5 5.0 2.5 0 -2.5 -5.0 160 120 80 40 -7.5 -10.0 -2 1.24 -1 0 1 0 2 -60 3 -40 0 20 40 60 80 100 120 Reference Input Current VS Ambient Temperature. High Current Operating Characteristics. Date: 5/6/04 -20 TA-Ambient Temperature (°C) VKA Cathode Voltage (V) SPX1432 1.24V Precision Adjustable Shunt Regulator 3 © Copyright 2004 Sipex Corporation TYPICAL PERFORMANCE CHARACTERISTICS: Continued 1.25 1.245 VKA--Cathode Voltage (V) VREF-Reference Voltage (V) 1.25 1.24 1.235 1.23 1.225 1.22 -60 -30 0 30 60 90 1.245 1.24 1.235 0.01 120 0.1 1 10 Ik--cathode Current (mA) TA-Ambient Temperature (°C) Reference Voltage VS Ambient Temperature. 100 Reference Voltage Load Regulation. 0 Ikoff Cathode Current (nA) 1000.0000 DVREF(mV) -10 -20 -30 100.0000 10.0000 1.0000 0.1000 0.0100 0.0010 0.0001 -40 0 -50 3 6 9 12 15 18 21 0 50 100 150 Ta Ambient Temperature (C) VKA-Cathode Voltage (V) Reference Voltage Line Regulation. VIN Off State Leakage VS Ambient Temperature. R VOUT IK fP = 100kHz Ch1-VIN 50Ω Ch2-VKA GND Test Circuit for Pulse Response. Date: 5/6/04 IKA = 0 to 100µA. SPX1432 1.24V Precision Adjustable Shunt Regulator 4 © Copyright 2004 Sipex Corporation TYPICAL PERFORMANCE CHARACTERISTICS: Continued IKA = 0 to 300µA. IKA = 0 to 1mA. IKA = 0 to 10mA. IKA = 0 to 50mA. IKA = 0 to 80mA IKA = 0 to 100mA Date: 5/6/04 SPX1432 1.24V Precision Adjustable Shunt Regulator 5 © Copyright 2004 Sipex Corporation PACKAGE: 3 PIN SOT23 D b B 3 B E1 1 SEE VIEW C E 2 e Gauge Plane e1 L2 L L1 VIEW C 3 PIN SOT-23 JEDEC TO-236 (AB) Variation Dimensions in (mm) A MIN A 0.89 A1 0.01 A2 NOM MAX - 1.12 - 0.88 .95 - 0.50 c 0.08 - 0.20 2.90 e 0.95 BSC e1 1.90 BSC E 2.10 E1 1.20 L 0.30 SIDE VIEW b WITH PLATING - 2.64 1.40 c 0.60 0.54 REF L1 Ø C A1 3.04 1.30 0.45 A 1.02 0.30 2.80 Seating Plane 0.10 b D A2 A BASE METAL 0º - 8º 3 PIN SOT-23 Date: 5/6/04 SPX1432 1.24V Precision Adjustable Shunt Regulator 6 © Copyright 2004 Sipex Corporation 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 ............ PACKAGES 3-Pin SOT-23 3-Pin SOT-23 3-Pin SOT-23 3-Pin SOT-23 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. 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 7 © Copyright 2004 Sipex Corporation