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| (R) SPX431A,B,C Precision Adjustable Shunt Regulator FEATURES Trimmed Bandgap to 0.5%, 1% and 2% Wide Operating Current 1mA to 150mA Extended Temperature Range: 0C to 105C Low Temperature Coefficient 30 ppm/C Offered in TO-92, SOIC, SOT-89, SOT-23-5 Improved Replacement in Performance for TL431 Low Cost Solution APPLICATIONS Battery Operating Equipment Adjustable Supplies Switching Power Supplies Error Amplifiers Single Supply Amplifier Monitors / VCRs / TVs Personal Computers Now Available in Lead Free Packaging Refer to page 3 for pinouts. DESCRIPTION The SPX431 is a 3-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's thermal stability, wide operating current (150mA) and temperature range (0C to 105C) makes it suitable for a variety of applications that require a low cost, high performance solution. SPX431A 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 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 TO-92, SOIC-8, SOT-89, and SOT-23-5 packages. TYPICAL APPLICATIONS CIRCUIT Cathode (K) Reference (R) + 2.5V Anode (A) Date: 1/19/05 SPX431A,B,C Precision Adjustable Shunt Regulator (c) Copyright 2005 Sipex Corporation 1 ABSOLUTE MAXIMUM RATINGS Cathode-Anode Reverse Breakdown VKA ....................................... 37V Anode-Cathode Forward Current, (<10ms) IAK ................................. 1A Operating Cathode Current IKA .................................................. 150mA Reference Input Current IREF ........................................................ 10mA Continuous Power Dissipation at 25C PD TO-92 ..................................................................... 775mW SOT-23 .................................................................. 200 mW SOIC-8 .................................................................... 750mW SOT-89 ................................................................. 1000mW 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 Cathode Voltage Cathode Current SYMBOL VKA IK RATING VREF to 36 10 UNIT V mA TYPICAL THERMAL RESISTANCES PACKAGE TO-92 SOT-23 SOIC-8 SOT-89 0JA 0JC TYPICAL DERATING 6.3 mW/C 1.7 mW/C 5.7 mW/C 9.1 mW/C 160C/W 80C/W 575C/W 150C/W 175C/W 45C/W 110C/W 8C/W Typical deratings of the thermal resistances are given for ambient temperature >25. ELECTRICAL CHARACTERISTICS Electrical characteristics at 25C IK = 10mA VK = VREF, unless otherwise specified. PARAMETER SPX431A Reference Voltage VREF withTemp.* Ratio of Change in VREF to Cathode Voltage Reference Input Current IREF Temp Deviation Min IK for Regulation Off State Leakage Dynamic Output Impedance SPX431B Reference Voltage VREF withTemp.* Ratio of Change in VREF to Cathode Voltage Reference Input Current IREF Temp Deviation Min IK for Regulation Off State Leakage Dynamic Output Impedance VREF TC VREF VK IREF IREF IK(MIN) IK(OFF) ZKA 2 2 2 3 3 3 2 4 2 VREF = 0V, VKA = 36V z = 1kHz IK = 1 to 150mA TJ = 0C to 105C VREF to 10V 10V to 36V -2.7 -2.0 TJ = 0C to 105C 2.470 2.449 2.495 0.07 -1.0 -0.4 0.7 0.4 0.4 0.04 0.15 2.520 2.541 0.20 0.3 4.0 1.2 1.0 500 0.5 A A mA nA V V mV/C mV/V VREF TC VREF VK IREF IREF IK(MIN) IK(OFF) ZKA 2 2 2 3 3 3 2 4 2 VREF = 0V, VKA = 36V z = 1kHz IK = 1 to 150mA TJ = 0C to 105C VREF to 10V 10V to 36V -2.7 -2.0 TJ = 0C to 105C 2.490 2.469 2.503 0.07 -1.0 -0.4 0.7 0.4 0.4 0.04 0.15 2.515 2.536 0.20 0.3 4.0 1.2 1.0 250 0.5 A A mA nA V V mV/C mV/V SYMBOL FIGURE CONDITIONS MIN TYP MAX UNITS Date: 1/19/05 SPX431A,B,C Precision Adjustable Shunt Regulator (c) Copyright 2005 Sipex Corporation 2 PARAMETER SPX431C Reference Voltage VREF withTemp.* Ratio of Change in VREF to Cathode Voltage Reference Input Current IREF Temp Deviation Min IK for Regulation Off State Leakage Dynamic Output Impedance SYMBOL VREF TC VREF VK IREF IREF IK(MIN) IK(OFF) ZKA FIGURE 2 2 2 3 3 3 2 4 2 CONDITIONS MIN 2.445 TYP 2.495 0.07 MAX 2.545 0.20 0.3 4.0 1.2 1.0 1000 0.5 UNITS V V mV/C mV/V A A mA nA TJ = 0C to 105C VREF to 10V 10V to 36V TJ = 0C to 105C VREF = 0V, VKA = 36V z = 1kHz IK = 1 to 150mA -2.7 -2.0 -1.0 -0.4 0.7 0.4 0.4 0.04 0.15 Operating Range (TJ ) = -40C to 125C. * See appropiate test circuit (Figure 2) CALCULATING AVERAGE TEMPERATURE COEFFICIENT (TC) ppm 0 % 0 mV 0 VREF * TC in mV/C = T VREF (mV) TA -10 5000 0.5 * TC in %/C = (V (V VREF at 25C) x 100 REF TA VREF at 25C) x 106 0 15 30 45 60 75 90 105 * TC in ppm/C = REF Junction Temperature (C) TA 0.07 mV/C 0.003 %/C 27 ppm/C Figure 1. VREF VS Temperature. PACKAGE PINOUTS 8-Pin Surface Mount (S) SOT-23-5 (M5) REF CATHODE ANODE ANODE N/C 1 2 3 4 8 7 REF ANODE ANODE N/C N/C N/C CATHODE 5 ANODE 4 1 2 3 SOT-89 (M1) TO-92 (N) SPX431 1 2 3 1 REF SPX431 2 3 CATHODE ANODE REF ANODE CATHODE SPX431 6 5 Top View Top View Top View Bottom View Date: 1/19/05 SPX431A,B,C Precision Adjustable Shunt Regulator (c) Copyright 2005 Sipex Corporation 3 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 150 125 100 VKA = VREF 0C to 105C 2.53 2.52 VREF Reference Voltage (V) VKA = VREF IK = 10mA IK Cathode Current (mA) 2.51 2.50 2.49 2.48 2.47 2.46 75 50 25 0 -25 -50 -75 -100 -2 -1 0 1 2 VKA Cathode Voltage (V) 3 2.45 -60 -30 0 30 60 90 120 TA Ambient Temperature (C) Figure 5. High Current Operating Characteristics Figure 6. Reference Voltage VS Ambient Tempetature 3.0 IREF Reference Input Current (A) 900 800 700 IK Cathode Current (A) VKA = VREF 0 to 105C 2.5 2.0 1.5 1.0 0.5 0 -60 R1 = 10k R2 = IK = 10mA 600 500 400 300 200 100 0 -100 -200 -1.0 1.0 2.0 VKA Cathode Voltage (V) 0 3.0 105C 25C -0C -30 0 30 60 90 120 TA Ambient Temperature (C) Figure 7. Low Current Operating Characteristics Date: 1/19/05 Figure 8. Reference Input Current VS Ambient Temperature (c) Copyright 2005 Sipex Corporation SPX431A,B,C Precision Adjustable Shunt Regulator 4 TYPICAL PERFORMANCE CHARACTERISTICS (continued) 0 70 60 0C Noise Voltage nV/Hz -10 50 40 30 20 10 0 10 VKA = VREF IK = 10mA TA = 25C 100 1K 10K 100K 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) Figure 9. Reference Voltage Line Regulation VS Cathode Voltage and TAMBIENT Figure 10. Noise Voltage VS Frequency 0.150 ZKA Dynamic Impedance () REF LEVEL 60.000dB 0.0deg /DIV 10.000dB 45.000deg MARKER 19 422 MAG (A/R) MARKER 19 422 PHASE (A/R) 611.000Hz -0.125dB 611.000Hz 46.717deg 215 180 PHASE 0.125 0.100 0.075 0.050 0.025 VKA = VREF IK = 1 to 100mA f1kHz 60dB 50dB 40dB 30dB 20dB 10dB 0dB -10dB -20dB GAIN 135 90 45 0 -45 -90 -135 -180 -215 0.0 -60 -30 0 30 60 90 120 TA Free Air Temperature -30dB -40dB 10 100 1K 10K 100K 1M 10M START 10.000Hz STOP 50 000 000.000Hz Figure 11. Low Frequency Dynamic Output Impedance VS TAMBIENT Figure 12. Small Signal Gain and Phase VS Frequency; IK = 10mA, TA = 25C VOUT 15k 230 VIN 9F IK VOUT VIN 8.25k GND Figure 13. Test Circuit for Gain and Phase Frequency Response Date: 1/19/05 Figure 14. FZ = 100kHz, IK = 10mA, TA = 25C SPX431A,B,C Precision Adjustable Shunt Regulator (c) Copyright 2005 Sipex Corporation 5 TYPICAL PERFORMANCE CHARACTERISTICS (continued) 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 A STABLE 30 20 10 0 100 TA = 25C B D GND Figure 15. Test Circuit for Pulse Response 101 102 103 104 105 106 107 CL Load Capacitance (pF) Figure 16. Stability Boundry Conditions 100 ZKA - Dynamic Impedance () 150 IK R TA = 25 C IK =1 to 100mA 10 CL 1.0 10k 0.1 0.01 1K 10K 100K 1M 10M f Frequency (Hz) Figure 17. Test Circuit for Stability Figure 18. Dynamic Output Impedance TA = 25C, IK = 1 to 100mA 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) Figure 19. Off State Leakage Figure 20. Shunt Regulator VOUT = (1+R1/R2)VREF Date: 1/19/05 SPX431A,B,C Precision Adjustable Shunt Regulator (c) Copyright 2005 Sipex Corporation 6 TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN ISINK R2 Q1 Opto Isolator R3 R1 0.1% VOUT Isolated Feedback R3 sets feedback gain, C1 provides feedback compensation SPX431A,B,C C1 R1 0.1% C2 + SPX431A,B,C R2 0.1% VOUTRTN Figure 21. Constant Current, Sink, ISINK = VREF/R1 Figure 22. Reference Amplifier for Isolated Feedback in Off-Line DC-DC Converters 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 VCC * Resistor values are chosen such that the effect to IREF is negligible. R2 VIN R1 VOUT SPX431A,B,C Figure 25. Single Supply Comparator with Temperature Compensated Threshold. VIN threshold = 2.5V Date: 1/19/05 SPX431A,B,C Precision Adjustable Shunt Regulator (c) Copyright 2005 Sipex Corporation 7 PACKAGE: 8 PIN NSOIC D e O E/2 E1/2 E1 L2 E Seating Plane O1 L1 1 L Gauge Plane O b VIEW C INDEX AREA (D/2 X E1/2) TOP VIEW A A1 Seating Plane A2 SIDE VIEW 8 Pin NSOIC JEDEC MO-012 (AA) Variation MIN NOM MAX SYMBOL A 1.35 1.75 A1 0.1 0.25 A2 1.25 1.65 b 0.31 0.51 c 0.17 0.24 4.90 BSC D 6.00 BSC E 3.90 BSC E1 1.27 BSC e L 0.4 1.27 1.04 REF L1 0.25 BSC L2 o 0 8 o1 5 15 Note: Dimensions in (mm) B B SEE VIEW C b c BASE METAL SECTION B-B WITH PLATING Date: 1/19/05 SPX431A,B,C Precision Adjustable Shunt Regulator (c) Copyright 2005 Sipex Corporation 8 PACKAGE: 5 PIN SOT-23 D e1 N N/2 +1 E/2 E1/2 B E1 E B SEE VIEW C VIEW A-A 1 e O b Gauge Plane L Seating Plane O L1 L O 2 N/2 5 Pin SOT-23 JEDEC MO-178 (AA) Variation MIN NOM MAX SYMBOL A 1.45 A1 0 0.15 A2 0.9 1.15 1.3 b 0.3 0.5 c 0.08 0.22 2.90 BSC D 2.80 BSC E 1.60 BSC E1 0.95 BSC e 1.90 BSC e1 L 0.3 0.45 0.6 0.60 REF L1 0.25 BSC L2 O 0 4 8 o 5 10 15 Note: Dimensions in (mm) VIEW C A A2 Seating Plane A1 SIDE VIEW b WITH PLATING c BASE METAL SECTION B-B Date: 1/19/05 SPX431A,B,C Precision Adjustable Shunt Regulator (c) Copyright 2005 Sipex Corporation 9 PACKAGE: 3 PIN SOT-89 D D1 3 O1.0 E H 5(2x) L 1 e 2 e1 C SYMBOL b L b1 C D D1 H E e e1 3 Pin SOT-89 MIN NOM 0.36 0.42 0.8 0.41 0.47 0.38 0.4 4.4 4.5 1.4 1.6 3.94 2.4 2.5 1.45 1.5 2.9 3 8(2x) MAX 0.48 1.2 0.53 0.43 4.6 1.75 4.25 2.6 1.55 3.1 Ro.15 b b1 b Note: Dimensions in (mm) Date: 1/19/05 SPX431A,B,C Precision Adjustable Shunt Regulator (c) Copyright 2005 Sipex Corporation 10 PACKAGE: 3 PIN TO-92 L e e1 W D A b S1 SYMBOL A b E e e1 L R S1 W D a 3 Pin TO-92 MIN NOM 0.17 0.014 0.13 0.95 0.045 0.5 0.085 0.045 0.016 0.175 4 - MAX 0.195 0.02 0.155 0.105 0.055 0.61 0.095 0.06 0.022 0.195 6 R E Note: Dimensions in (inches) a(2x) Date: 1/19/05 SPX431A,B,C Precision Adjustable Shunt Regulator (c) Copyright 2005 Sipex Corporation 11 ORDERING INFORMATION PART NUMBER ACCURACY OUTPUT VOLTAGE PACKAGES SPX431AM5 ........................ 0.5% ..................... 2.503V ......................... 5-Pin SOT-23 SPX431AM5/TR .................. 0.5% ..................... 2.503V ......................... 5-Pin SOT-23 SPX431AM1 ........................ 0.5% ..................... 2.503V ......................... 3-Pin SOT-89 SPX431AM1/TR .................. 0.5% ..................... 2.503V ......................... 3-Pin SOT-89 SPX431AS .......................... 0.5% ..................... 2.503V ............................. 8-Pin SOIC SPX431AS/TR ..................... 0.5% ..................... 2.503V ............................. 8-Pin SOIC SPX431AN .......................... 0.5% ..................... 2.503V ........................... 3-Pin TO-92 SPX431AN/TR .................... 0.5% ..................... 2.503V ........................... 3-Pin TO-92 SPX431BM5 ........................ 1.0% ..................... 2.495V ......................... 5-Pin SOT-23 SPX431BM5/TR .................. 1.0% ..................... 2.495V ......................... 5-Pin SOT-23 SPX431BM1 ........................ 1.0% ..................... 2.495V ......................... 3-Pin SOT-89 SPX431BM1/TR .................. 1.0% ..................... 2.495V ......................... 3-Pin SOT-89 SPX431BS .......................... 1.0% ..................... 2.495V ............................. 8-Pin SOIC SPX431BS/TR ..................... 1.0% ..................... 2.495V ............................. 8-Pin SOIC SPX431BN .......................... 1.0% ..................... 2.495V ........................... 3-Pin TO-92 SPX431BN/TR .................... 1.0% ..................... 2.495V ........................... 3-Pin TO-92 SPX431CM5 ........................ 2.0% ..................... 2.495V ......................... 5-Pin SOT-23 SPX431CM5/TR .................. 2.0% ..................... 2.495V ......................... 5-Pin SOT-23 SPX431CM1 ........................ 2.0% ..................... 2.495V ......................... 3-Pin SOT-89 SPX431CM1/TR .................. 2.0% ..................... 2.495V ......................... 3-Pin SOT-89 SPX431CS .......................... 2.0% ..................... 2.495V ............................. 8-Pin SOIC SPX431CS/TR .................... 2.0% ..................... 2.495V ............................. 8-Pin SOIC SPX431CN .......................... 2.0% ..................... 2.495V ........................... 3-Pin TO-92 SPX431CN/TR .................... 2.0% ..................... 2.495V ........................... 3-Pin TO-92 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 Pack quantity is 2,000 for TO-92 and 2,500 for SOT-23, SOT-89 and NSOIC. CLICK HERE TO ORDER SAMPLES Corporation ANALOG EXCELLENCE Sipex Corporation Headquarters and Sales Office 22 Linnell Circle Billerica, MA 01821 TEL: (978) 667-8700 FAX: (978) 670-9001 e-mail: sales@sipex.com Date: 1/19/05 SPX431A,B,C Precision Adjustable Shunt Regulator (c) Copyright 2005 Sipex Corporation 12 |
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