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SPX431A,B,C Precision Adjustable Shunt Regulator FEATURES * Trimmed Bandgap: 0.5%, 1% and 2% * Wide Operating Current: 1mA to 150mA * Extended Temperature Range: 0C to 105C * Low Temperature Coefficient: 30 ppm/C * Improved Replacement in Performance for TL43 * Low Cost Solution * Available in Lead Free, RoHS compliant packaging: SOIC, SOT-89, SOT-23-3, SOT-23-5, and TO-92 APPLICATIONS * Battery Operated Equipment * Adjustable Supplies * Switching Power Supplies * Error Amplifiers * Single Supply Amplifier * Monitors/VCRs/TVs * Personal Computers DESCRIPTION The SPX43 is a three-terminal adjustable shunt voltage regulator providing a highly accurate bandgap reference. The SPX431 acts as an open-loop error amplifier with a 2.5V temperature compensation reference. The SPX431 has thermal stability, wide operating current of 150mA and broad temperature range of 0C to 150C, making it suitable for a variety of applications which require a low-cost, high performance solution. SPX431A tolerance of 0.5% is proven to be sufficient to overcome all other errors in the system to virtually eliminate the need for trimming in the power supply manufacturer's assembly line and contribute a significant cost savings. The output voltage may be adjusted to any value between VREF and 36 volts with two external resistors. The SPX431 is available in SOIC-8, SOT-23-3, SOT-23-5, SOT89, and TO-92 packages. TyPICAL APPLICATIONS CIRCUIT Cathode (K) Reference (R) + 2.5V Anode (A) Rev F: Nov 2-06 SPX43A,B,C Precision Adjustable Shunt Regulator (c) 2006 Sipex Corporation ABSOLUTE mAXImUm RATINGS Cathode-Anode Reverse Breakdown Vka ......................................37V Anode-Cathode Forward Current, (<10ms) Iak ................................A Operating Cathode Current Ika ..................................................150mA Reference Input Current Iref ......................................................0mA Continuous Power Dissipation at 25C Pd SOIC-8 .....................................................................750mW SOT-23-5 ................................................................200 mW SOT-23-3 ................................................................47 mW SOT-89 ..................................................................000mW\ TO-92 .......................................................................775mW Junction Temperature Tj ........................................................... 150 C Storage Temperature Tstg ...............................................-65 to 150 C NOTE: 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. RECOmmENDED CONDITIONS PARAmETER SymBOL Cathode Voltage VKA Cathode Current IK RATING VREF to 36 0 UNIT V mA TyPICAL ThERmAL RESISTANCES PACKAGE SOIC-8 TO-92 SOT-89 OJA OJC TyPICAL DERATING 5.7 mW/C 6.3 mW/C 9.1 mW/C 1.7 mW/C 3.3 mW/C 124.8C/W 45C/W 131.9C/W 80C/W 107.1C/W 8C/W SOT-23-5 191C/W 150C/W SOT-23-3 300C/W 136C/W Typical deratings of the thermal resistances are given for ambient temperature >25. ELECTRICAL ChARACTERISTICS Parameter Symbol Test Conditions Electrical characteristics at 25C Ik = 10mA Vk = Vref, unless otherwise specified. Test Circuit min Reference Voltage VREF TC Vref Vk IREF IREF IK(MIN) IK(OFF) ZKA VREF = 0V, VKA = 36V fZ = 1kHz IK = 1 to 150mA TJ = 0C to 105C VREF to 10V 10V to 36V TJ = 0C to 105C -2.7 -2 SPX431A Typ max min SPX431B Typ max min SPX431C Typ max 2.545 V V mV/ C mV/ V A A mA nA Unit 2.490 2.515 2.470 2.520 2.503 2.495 2.445 2.495 2.469 2.536 2.449 2.541 0.07 -.0 -0.4 0.7 0.4 0.4 0.04 0.15 0.20 -2.7 -2.0 0.07 -.0 -0.4 0.7 0.4 0.4 0.04 0.15 0.20 -2.7 -2 0.07 -.0 -0.4 0.7 0.4 0.4 0.04 0.15 VREF with Temp. Ratio of Change in VREF to Cathode Voltage Reference Input Current IREF Temp Deviation Min IK for Regulation Off State Leakage Dynamic Output Impedance 0.20 2 2 2 0.3 4 .2 250 0.5 0.3 4 .2 500 0.5 0.3 4 .2 000 0.5 3 Rev F: Nov 2-06 SPX43A,B,C Precision Adjustable Shunt Regulator (c) 2006 Sipex Corporation 2 CALCULATING AvERAGE TEmPERATURE COEFFICIENT (TC) ppm/C 0 %/C 0 mV/C 0 DVREF D TC in mV/C = DVREF (mV) DTA -10 5000 0.5 TC in % /C = ( DVREF DVREF at 25C DTA ) x 100 0 15 30 45 60 75 90 105 TC in ppm/C = ( DV REF DVREF at 25C DTA ) x 106 Junction Temperature (C) 0.07 mV/C 0.003 %/C 27 ppm/C Figure 1. Vref VS Temperature. PACKAGE PINOUTS 8-Pin Surface Mount (S) CATHODE ANODE ANODE N/C 1 2 3 4 8 7 REF ANODE ANODE N/C SOT-23-5 (M5) REF 5 4 2 3 SOT-89 (M1) ANODE TO-92 (N) 1 2 3 SOT-23-3 (M) ANODE 3 SPX431 SPX431 1 SPX431 1 2 3 REF ANODE CATHODE 1 6 5 SPX431 2 N/C N/C CATHODE REF ANODE CATHODE CATHODE REF Top View Top View Top View Bottom View Top View TEST CIRCUITS VIN VKA = VREF VIN VKA VIN VKA IK (OFF) IREF IK R1 (VREF) R2 IREF IK Test Circuit . Test Circuit for Vka = Vref Test Circuit 2. Test Circuit for Vka > Vref Test Circuit 3. Test Circuit for Ikoff Rev F: Nov 2-06 SPX43A,B,C Precision Adjustable Shunt Regulator (c) 2006 Sipex Corporation 3 TyPICAL PERFORmANCE ChARACTERISTICS 150 125 100 2.53 VKA = VREF Temperature Range: 0C to 105C 2.52 VREF Reference Voltage (V) 2.51 2.50 2.49 2.48 2.47 2.46 2.45 -60 VKA = VREF IK = 10mA IK - Cathode Current (mA) 75 50 25 0 -25 -50 -75 -100 -2 -1 0 1 2 3 VKA - Cathode Voltage (V) -30 0 30 60 90 TA Ambient Temperature (C) 120 High Current Operating Characteristics Reference Voltage vs. Ambient Temperature 900 VKA = VREF 0 to 105C 3.0 IREF Reference Input Current (A) 800 700 2.5 2.0 1.5 1.0 0.5 0 -60 R1 = 10k R2 = IK = 10mA IK Cathode Current (A) 600 500 400 300 200 100 0 -100 -200 -1.0 0 1.0 2.0 VKA Cathode Voltage (V) 3.0 105C 25C -0C -30 0 30 60 90 TA Ambient Temperature (C) 120 Low Current Operating Characteristics Reference Input Current vs. Ambient Temperature 0 70 60 0C Noise Voltage nV//Hz -10 50 40 30 20 10 0 VKA = VREF IK = 10mA TA = 25C VREF (mV) -20 25C 75C -30 IKA = 10mA -40 125C -50 0 3 6 9 12 15 18 21 24 27 30 VKA Cathode Voltage (V) f Frequency (Hz) Reference Voltage Line Regulation vs, Cathode Voltage and Tambient Rev F: Nov 2-06 Noise Voltage vs. Frequency SPX43A,B,C Precision Adjustable Shunt Regulator (c) 2006 Sipex Corporation 4 TyPICAL PERFORmANCE ChARACTERISTICS (continued) 0.150 0.125 0.100 0.075 0.050 0.025 0.0 -60 -30 0 30 60 90 TA Free Air Temperature 120 VKA = VREF IK = 1 to 100mA f1kHz 60dB 50dB 40dB 30dB 20dB 10dB 0dB -10dB -20dB -30dB -40dB 10 GAIN PHASE REF LEVEL 60.000dB 0.0deg /DIV 10.000dB 45.000deg MARKER 19 422 611.000Hz MAG (A/R) -0.125dB MARKER 19 422 611.000Hz PHASE (A/R) 46.717deg 215 180 135 90 45 0 -45 -90 -135 -180 -215 100 1K 10K 100K 1M 10M START 10.000Hz STOP 50 000 000.000Hz Low Frequency Dynamic Output Impedance vs. Tambient Small Signal Gain and Phase vs. Frequency; Ik = 0mA, Ta = 25C VOUT 15k 230 VIN 9F IK VOUT VIN 8.25k GND Test Circuit for Gain and Phase Frequency Response Fz = 100kHz, Ik = 0mA, Ta = 25C VIN 250 IK Cathode Current (mA) 100 90 A: VKA = VREF B: VKA= 5V at IK=10mA C: VKA=10V at IK=10mA D: VKA=15V at IK=10mA C VOUT IK fp = 100kHz 50 80 70 60 50 40 STABLE 30 20 10 0 100 TA = 25C B A STABLE D 101 102 103 104 105 106 107 GND Test Circuit for Pulse Response CL Load Capacitance (pF) Stability Boundry Conditions Rev F: Nov 2-06 SPX43A,B,C Precision Adjustable Shunt Regulator (c) 2006 Sipex Corporation 5 TyPICAL PERFORmANCE ChARACTERISTICS (continued) 100 150 W IK R ZKA - Dynamic Impedance () TA = 25 C IK =1 to 100mA 10 CL 1.0 10k 0.1 0.01 1K 10K 100K 1M 10M f Frequency (Hz) Test Circuit for Stability Dynamic Output Impedance Ta = 25C, Ik = to 00mA 100 VIN R3 VOUT IKOFF Cathode Current (nA) 10 VKA = 36V VREF = 0V 1 R1 0.1% VREF SPX431A,B,C 0.1 R2 0.1% 0.01 -50 0 50 100 150 TA Ambient Temperature (C) Off-State Leakage Shunt Regulator Vout = (1+R1/R2)Vref VIN ISINK R2 VOUT R3 Q1 Isolated Feedback Opto Isolator R1 0.1% R3 sets feedback gain, C1 provides feedback compensation SPX431A,B,C R1 0.1% C2 + C1 SPX431A,B,C VOUTRTN R2 0.1% Constant Current, Sink, Isink = Vref/R1 Reference Amplifier for Isolated Feedback in Off-Line DC-DC Converters Rev F: Nov 2-06 SPX43A,B,C Precision Adjustable Shunt Regulator (c) 2006 Sipex Corporation 6 TyPICAL PERFORmANCE ChARACTERISTICS (continued) VIN R5 R4 VIN VOUT R1 0.1% R3 C1 SPX431A,B,C R1 0.1% R2 0.1% R3 VOUT R2 0.1% SPX431A,B,C Q1 Figure 23. Precision High Current Series Regulator Vout = (1+R1/R2)Vref Figure 24. High Current Shunt Regulator Vout = (1+R1/R2)Vref * Resistor values are chosen such that the effect to Iref is negligible. VCC R2 VIN R1 VOUT SPX431A,B,C Figure 25. Single Supply Comparator with Temperature Compensated Threshold. Vin Threshold = 2.5V Rev F: Nov 2-06 SPX43A,B,C Precision Adjustable Shunt Regulator (c) 2006 Sipex Corporation 7 PACKAGE: 8 PIN NSOIC Rev F: Nov 2-06 SPX43A,B,C Precision Adjustable Shunt Regulator (c) 2006 Sipex Corporation 8 PACKAGE: 5 PIN SOT-23 Rev F: Nov 2-06 SPX43A,B,C Precision Adjustable Shunt Regulator (c) 2006 Sipex Corporation 9 PACKAGE: 3 PIN SOT-89 Rev F: Nov 2-06 SPX43A,B,C Precision Adjustable Shunt Regulator (c) 2006 Sipex Corporation 0 PACKAGE: 3 PIN TO-92 Rev F: Nov 2-06 SPX43A,B,C Precision Adjustable Shunt Regulator (c) 2006 Sipex Corporation PACKAGE: 3 PIN SOT-23 Rev F: Nov 2-06 SPX43A,B,C Precision Adjustable Shunt Regulator (c) 2006 Sipex Corporation 2 ORDERING INFORmATION PART NUmBER ACCURACy OUTPUT vOLTAGE PACKAGE SPX431AM5 .........................0.5% ..................... 2.503V ..........................5-Pin SOT-23 SPX431AM5/TR....................0.5% ..................... 2.503V ..........................5-Pin SOT-23 SPX43AM .........................0.5% ..................... 2.503V ..........................3-Pin SOT-89 SPX431AM1/TR....................0.5% ..................... 2.503V ..........................3-Pin SOT-89 SPX43AS ............................0.5% ..................... 2.503V ............................. 8-Pin SOIC SPX431AS/TR ......................0.5% ..................... 2.503V ............................. 8-Pin SOIC SPX43AN ............................0.5% ..................... 2.503V ............................ 3-Pin TO-92 SPX43AM ...........................0.5% ..................... 2.503V ..........................3-Pin SOT-23 SPX431AM/TR......................0.5% ..................... 2.503V ..........................3-Pin SOT-23 SPX431BM5 .........................1.0% ..................... 2.495V ..........................5-Pin SOT-23 SPX431BM5/TR....................1.0% ..................... 2.495V ..........................5-Pin SOT-23 SPX43BM .........................1.0% ..................... 2.495V ..........................3-Pin SOT-89 SPX431BM1/TR....................1.0% ..................... 2.495V ..........................3-Pin SOT-89 SPX43BS ............................1.0% ..................... 2.495V ............................. 8-Pin SOIC SPX431BS/TR ......................1.0% ..................... 2.495V ............................. 8-Pin SOIC SPX43BN ............................1.0% ..................... 2.495V ............................ 3-Pin TO-92 SPX43BM ...........................1.0% ..................... 2.495V ..........................3-Pin SOT-23 SPX431BM/TR......................1.0% ..................... 2.495V ..........................3-Pin SOT-23 SPX431CM5 .........................2.0% ..................... 2.495V ..........................5-Pin SOT-23 SPX431CM5/TR ...................2.0% ..................... 2.495V ..........................5-Pin SOT-23 SPX43CM .........................2.0% ..................... 2.495V ..........................3-Pin SOT-89 SPX431CM1/TR ...................2.0% ..................... 2.495V ..........................3-Pin SOT-89 SPX43CS ............................2.0% ..................... 2.495V ............................. 8-Pin SOIC SPX431CS/TR ......................2.0% ..................... 2.495V ............................. 8-Pin SOIC SPX43CN............................2.0% ..................... 2.495V ............................ 3-Pin TO-92 SPX43CM ...........................2.0% ..................... 2.495V ..........................3-Pin SOT-23 SPX431CM/TR .....................2.0% ..................... 2.495V ..........................3-Pin SOT-23 Available in lead free packaging. To order add "-L" suffix to part number. Example: SPX431AM5/TR = standard; SPX431AM5-L/TR = lead free /TR = Tape and Reel TR pack quantity is 3000 for SOT-23-3, 2500 for SOT-23-5, SOT-89 and NSOIC, and 2000 for TO-92 in ammo pack. 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. Rev F: Nov 2-06 SPX43A,B,C Precision Adjustable Shunt Regulator (c) 2006 Sipex Corporation 3 |
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