SPX431AM1-L/TR

SPX431A,B,C Precision Adjustable Shunt Regulator FEATURES • Trimmed Bandgap: 0.5%, 1% and 2% • Wide Operating Current: 1mA to 150mA • Extended Temperature Range: 0°C to 105°C • Low Temperature Coefficient: 30 ppm/°C • Improved Replacement in Performance for TL431 • 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 SPX431 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 0°C to 150°C, 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 21-06 SPX431A,B,C Precision Adjustable Shunt Regulator  © 2006 Sipex Corporation ABSOLUTE MAXIMUM RATINGS Cathode-Anode Reverse Breakdown Vka ......................................37V Anode-Cathode Forward Current, (25°. ELECTRICAL CHARACTERISTICS Electrical characteristics at 25°C Ik = 10mA Vk = Vref, unless otherwise specified. Parameter Symbol Test Conditions Test Circuit SPX431A Min Reference Voltage VREF ∆VREF with Temp. TC Ratio of Change in VREF to Cathode Voltage ∆Vref ∆Vk Reference Input Current IREF TJ = 0°C to 105°C VREF to 10V 10V to 36V ∆IREF TJ = 0°C to 105°C Min IK for Regulation IK(MIN) Off State Leakage IK(OFF) VREF = 0V, VKA = 36V Dynamic Output Impedance ZKA fZ = 1kHz IK = 1 to 150mA Max 0.07 0.20 -1.0 -0.4 0.3 2 0.7 2 1 2 3 1 Min Typ SPX431C Max Min Typ 2.490 2.515 2.470 2.520 2.503 2.495 2.445 2.495 2.469 2.536 2.449 2.541 1 IREF Temp Deviation Rev F: Nov 21-06 1 1 Typ SPX431B Unit Max 2.545 V V 0.07 0.20 mV/ °C -1.0 -0.4 0.3 mV/ V 0.07 0.20 -1.0 -0.4 0.3 4 0.7 4 0.7 4 µA 0.4 1.2 0.4 1.2 0.4 1.2 µA 0.4 1 0.4 1 0.4 1 mA 0.04 250 0.04 500 0.04 1000 nA 0.15 0.5 0.15 0.5 0.15 0.5 Ω -2.7 -2 -2.7 -2.0 SPX431A,B,C Precision Adjustable Shunt Regulator  -2.7 -2 © 2006 Sipex Corporation CalculatiNG average Temperature coeFficient (tc) ppm/°C 0 %/°C 0 mV/°C 0 DVREF DVREF (mV) DTA TC in mV/°C = D -10 5000 TC in % /°C = 0.5 0 15 30 45 60 75 90 ( TC in ppm/°C = 105 DVREF ) DVREF at 25°C DTA ( x 100 ) DV REF DVREF at 25°C x 106 DTA 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 8 2 3 7 SPX431 4 SOT-89 (M1) SOT-23-5 (M5) REF ANODE 6 ANODE 5 N/C REF ANODE 5 4 2 SOT-23-3 (M) ANODE 3 3 SPX431 1 3 N/C N/C CATHODE Top View 2 1 SPX431 1 TO-92 (N) 2 3 1 REF ANODE CATHODE Top View Top View REF ANODE CATHODE Bottom View SPX431 CATHODE 2 REF Top View Test circuits VIN VKA = VREF VIN VKA VIN VKA IK (OFF) IREF IK R1 IREF IK (VREF) R2 Test Circuit 1. Test Circuit for Vka = Vref Rev F: Nov 21-06 Test Circuit 2. Test Circuit for Vka > Vref Test Circuit 3. Test Circuit for Ikoff SPX431A,B,C Precision Adjustable Shunt Regulator  © 2006 Sipex Corporation Typical Performance CHARACTERISTICS 2.53 150 VKA = VREF Temperature Range: 0°C to 105°C 100 IK - Cathode Current (mA) VKA = VREF IK = 10mA 2.52 VREF Reference Voltage (V) 125 75 50 25 0 -25 -50 2.51 2.50 2.49 2.48 2.47 2.46 -75 2.45 -60 -100 -2 -1 0 1 2 3 VKA - Cathode Voltage (V) 3.0 800 VKA = VREF 0° to 105°C 700 IK Cathode Current (µA) IREF Reference Input Current (µA) 900 600 500 400 105°C 300 25°C 200 -0°C 100 0 -100 -200 -1.0 0 1.0 2.0 VKA Cathode Voltage (V) R1 = 10kΩ R2 = ∞ IK = 10mA 2.5 2.0 1.5 1.0 0.5 0 -60 3.0 -30 0 30 60 90 TA Ambient Temperature (°C) 120 Reference Input Current vs. Ambient Temperature Low Current Operating Characteristics 0 70 60 Noise Voltage nV/÷Hz -10 0°C ∆VREF (mV) 120 Reference Voltage vs. Ambient Temperature High Current Operating Characteristics -20 25°C 75°C -30 125°C IKA = 10mA -40 -50 0 -30 0 30 60 90 TA Ambient Temperature (°C) 50 40 30 20 10 VKA = VREF IK = 10mA TA = 25°C 0 3 6 9 12 15 18 21 24 27 30 VKA Cathode Voltage (V) f Frequency (Hz) Noise Voltage vs. Frequency Reference Voltage Line Regulation vs, Cathode Voltage and Tambient Rev F: Nov 21-06 SPX431A,B,C Precision Adjustable Shunt Regulator  © 2006 Sipex Corporation Typical Performance CHARACTERISTICS (continued) 0.150 REF LEVEL 60.000dB 0.0deg VKA = VREF IK = 1 to 100mA f≤1kHz 0.125 /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 60dB 215° 50dB 0.100 180° PHASE 40dB 0.075 0.050 135° 30dB 90° 20dB 45° 10dB 0° 0dB 0.025 0.0 -60 -30 0 30 60 90 TA Free Air Temperature 120 GAIN -45° -10dB -90° -20dB -135° -30dB -180° -40dB 10 100 1K 10K 100K START 10.000Hz 1M -215° 10M STOP 50 000 000.000Hz Small Signal Gain and Phase vs. Frequency; Ik = 10mA, Ta = 25°C Low Frequency Dynamic Output Impedance vs. Tambient VOUT 9µF 15kΩ VIN 230Ω IK VOUT VIN 8.25kΩ GND Test Circuit for Gain and Phase Frequency Response Fz = 100kHz, Ik = 10mA, Ta = 25°C 100 VIN 90 250Ω 80 IK Cathode Current (mA) VOUT IK fp = 100kHz 50Ω A: VKA = VREF B: VKA= 5V at IK=10mA C: VKA=10V at IK=10mA D: VKA=15V at IK=10mA 70 C 60 50 40 STABLE A 30 STABLE 20 10 TA = 25°C B D 0 100 GND 102 103 104 105 106 107 CL Load Capacitance (pF) Stability Boundry Conditions Test Circuit for Pulse Response Rev F: Nov 21-06 101 SPX431A,B,C Precision Adjustable Shunt Regulator  © 2006 Sipex Corporation Typical Performance CHARACTERISTICS (continued) 100 ZKA - Dynamic Impedance (Ω) 150 W IK R CL 10kΩ TA = 25 °C IK =1 to 100mA 10 1.0 0.1 0.01 1K 10K 100K 1M 10M f Frequency (Hz) Dynamic Output Impedance Ta = 25°C, Ik = 1 to 100mA Test Circuit for Stability IKOFF Cathode Current (nA) 100 R3 VIN VOUT 10 R1 0.1% VKA = 36V VREF = 0V 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 VOUT VIN ISINK R3 R2 R1 0.1% Opto Isolator Q1 R3 sets feedback gain, C1 provides feedback compensation Isolated Feedback SPX431A,B,C C2 R1 0.1% + C1 SPX431A,B,C R2 0.1% VOUTRTN Reference Amplifier for Isolated Feedback in Off-Line DC-DC Converters Constant Current, Sink, Isink = Vref/R1 Rev F: Nov 21-06 SPX431A,B,C Precision Adjustable Shunt Regulator  © 2006 Sipex Corporation Typical Performance CHARACTERISTICS (continued) VIN VIN R5 VOUT R1 0.1% R4 R1 0.1% C1 SPX431A,B,C R3 R2 0.1% R3 VOUT Q1 SPX431A,B,C R2 0.1% Figure 24. High Current Shunt Regulator Vout = (1+R1/R2)Vref Figure 23. Precision High Current Series 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 21-06 SPX431A,B,C Precision Adjustable Shunt Regulator  © 2006 Sipex Corporation PACKAGE: 8 PIN NSOIC Rev F: Nov 21-06 SPX431A,B,C Precision Adjustable Shunt Regulator  © 2006 Sipex Corporation PACKAGE: 5 PIN SOT-23 Rev F: Nov 21-06 SPX431A,B,C Precision Adjustable Shunt Regulator  © 2006 Sipex Corporation PACKAGE: 3 PIN SOT-89 Rev F: Nov 21-06 SPX431A,B,C Precision Adjustable Shunt Regulator 10 © 2006 Sipex Corporation PACKAGE: 3 PIN TO-92 Rev F: Nov 21-06 SPX431A,B,C Precision Adjustable Shunt Regulator 11 © 2006 Sipex Corporation PACKAGE: 3 PIN SOT-23 Rev F: Nov 21-06 SPX431A,B,C Precision Adjustable Shunt Regulator 12 © 2006 Sipex Corporation 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 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 SPX431AM............................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 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 SPX431BM............................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 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 SPX431CM............................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 21-06 SPX431A,B,C Precision Adjustable Shunt Regulator 13 © 2006 Sipex Corporation