SPX431L Low Voltage Precision Adjustable Shunt Regulator FEATURES APPLICATIONS • Tight Tolerance.................................................. 0.5% @ 10mA • Wide Operating Range..................................... 1mA to 100mA • Low Extended Temperature Range ....................0°°C to 105°°C • Low Temperature Coefficient .................................30 ppm/°°C • Offered in TO-92, SOT-89, SOT-23-3 and SO-8 • Improved replacement in performance of AS431 & TL431 • Low Cost Solution • Battery Operating Equipment • Adjustable Supplies • Switching Power Supplies • Error Amplifiers • Single Supply Amplifier • Monitors/ VCR/ TV • Personal Computers PRODUCT DESCRIPTION The SPX431L is a 3-terminal Adjustable Shunt Voltage Regulator providing a highly accurate bandgap reference. SPX431L acts as an open-loop error amplifier with a 2.5V temperature compensation reference. The SPX431L thermal stability, wide operating current (100mA) and temperature range (0°C to 105°C) makes it suitable for all variety of applications that are looking for a low cost solution with high performance. The output voltage may be adjusted to any value between VREF and 20V with 2 external resistors. The SPX431L is operating in full industrial temperature range of 0°C to 105°C. The SPX431L is available in TO-92, SOT-89, SOT-23-3 and SO-8 packages. PIN CONNECTIONS CATHODE (K) 8-Pin Surface Mount (S) REFERENCE (R) + - CATHODE 1 8 REF ANODE 2 7 ANODE SPX431L ANODE 3 6 ANODE N/C 4 5 N/C TO-92 (N) 1 REF 2 3 CATHODE ANODE Bottom View 2.5V Top View ANODE (A) SOT-23-3 (M) SOT-89 (M1) ANODE 1 SPX431L SPX431L 2 3 N/C Top View CATHODE 1 REF 2 3 ANODE CATHODE Top View Rev. 10/30/00 SPX431L ABSOLUTE MAXIMUM RATINGS Parameter Cathode-Anode Reverse Breakdown Anode-Cathode Forward Current Operating Cathode Current Reference Input Current Continuous Power Dissipation at 25°C TO-92 SOT-23 SOIC-8 SOT-89 Junction Temperature Storage Temperature Lead Temperature (Soldering 10 sec.) Symbol VKA IAK IKA IREF PD TJ TSTG TL Rating 30 1 150 10 Units V A mA mA 775 200 750 1000 150 -65 to +150 300 mW mW mW mW °C °C °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. RECOMMENDED CONDITIONS Parameter Cathode Voltage Cathode Current Symbol VKA IK Rating VREF to 20 10 TYPICAL THERMAL RESISTANCE Unit V mA Package Type TO-92 SOT-23 SOIC-8 SOT-89 θJA 160°C/W 575°C/W 175°C/W 110°C/W θJC 80°C/W 150°C/W 45°C/W 8°C/W Typical Derating 6.3 mW/°C 1.7 mW/°C 5.7 mW/°C 9.1 mW/°C ELECTRICAL CHARACTERISTICS at 25°C IK @ 10mA VK=VREF , unless otherwise specified. Parameter Reference Voltage 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 Test Conditions VREF TA = 25°C TC = 1 ∆ VREF ∆VK VREF to 10V 10V to 20V TC = 2 TC = 2 IREF ∆IREF IK(MIN) IK(OFF) ZKA Over Temp. TC = 2 TC = 1 VREF = 0V, VKA = 20V TC = 3 TC = 1 SPX431LA Min Typ 2.490 2.503 -2.7 -2 Max 2.515 Min 2.470 -1.0 -0.4 0.3 -2.7 -2 0.7 SPX431L Typ Max 2.495 2.520 -1.0 -0.4 0.3 4 0.7 0.4 1.2 0.4 SPX431LC Min Typ Max 2.445 2.495 2.545 -2.7 -2 Unit V -1.0 -0.4 0.3 mV/V 4 0.7 4 µA 0.4 1.2 0.4 1.2 µA 1 0.4 1 0.4 1 mA 0.04 1 0.04 1 0.04 1 µA 0.15 0.5 0.15 0.5 0.15 0.5 Ω TC = Test Circuit Rev. 10/30/00 SPX431L 0 mV % ppm *CALCULATING AVERAGE TEMPERATURE COEFFICEINT (TC) 0 0 ∆VREF TC in mV/°C = ∆T -10 5000 TC in mV/°C = 0.5 0 15 30 45 60 75 90 TC in ppm/°C = 105 ∆VREF (mV) ∆TA ( ∆VREF ∆VREF at 25°C ∆TA ( ) ∆VREF ∆VREF at 25°C ∆TA x 100 ) x 106 0.07 mV/°C 0.003 %/°C 27 ppm/°C TEST CIRCUITS VIN IREF VKA = VREF IK VIN VKA IK R 1 (VREF) VIN VKA IK (OFF) IREF R 2 1G-38 TEST CIRCUIT 1 1G-40 1G-39 TEST CIRCUIT 2 TEST CIRCUIT 3 Rev. 10/30/00 SPX431L TYPICAL PERFORMANCE CURVES Low Current Operating Characteristics High Current Operating Characteristics 900 150 VKA = VREF Temperature Range: - 0°C to 105 °C 700 100 600 75 500 400 105 °C 300 VKA = VREF Temperature Range: - 0°C to 105 °C 125 IK - Cathode Current (mA) µA) IK - Cathode Current (µ 800 25 °C 200 50 25 0 -25 -0 °C 100 -50 0 -75 -100 -100 -2 -1 -200 -1.0 0 1.0 2.0 0 1 2 3 VKA - Cathode Voltage (V) 3.0 Figure 3 VKA - Cathode Voltage (V) Figure 2 Off State Leakage Reference Voltage vs. Ambient Temperature 100 2.53 VKA = VREF IK = 10 mA 2.52 10 2.51 VREF - Reference Voltage (V) IZ off - Off State Cathode Current (nA) VKA = 36V VREF = 0V 1 0.1 2.50 VREF = 2.500 V at 25 °C 2.49 2.48 2.47 2.46 0.01 2.45 -60 -30 0 30 60 90 120 -60 -30 0 30 60 TA - Ambient Temperature ( °C) TA - Ambient Temperature ( °C) Figure 4 Figure 5 90 120 Rev. 10/30/00 SPX431L TYPICAL PERFORMANCE CURVES Reference Input Current Reference Voltage Line Regulation 0 3.0 R1 = 10 kΩ R2 = ∞ IK = 10 mA -10 VKA - Cathode Voltage (V) ( A) IREF - Reference Input Current µ 2.5 2.0 1.5 0 °C -20 25 °C 75 °C -30 105 °C -40 1.0 -50 0.5 0 3 6 9 12 15 18 21 24 27 30 VKA - Cathode Voltage (V) 0 -60 -30 0 30 60 90 Figure 7 120 TA - Ambient Temperature ( °C) Figure 6 Noise Voltage Low Frequency Dynamic Output Impedance 70 0.150 VKA = VREF IKA = 1 to 100 mA f < 1 kHz 0.125 Ω) ZKA - Dynamic Impedance (Ω 60 √Hz Noise Voltage nV/√ 50 40 30 0.100 0.075 0.050 20 0.025 10 0.0 -60 -30 0 30 60 90 120 TA - Free Air Temperature 0 10 100 1k 10 k 100 k Figure 9 f - Frequency (Hz) Figure 8 Rev. 10/30/00 SPX431L TYPICAL PERFORMANCE CURVES Dynamic Output Impedance 100 TA = 25 °C IK = 1 to 100 mA Ω) ZKA - Dynamic Impedance (Ω 10 1.0 0.1 0.01 1k 10 k 100 k 1M 10 M f - Frequency (Hz) Figure 10 Small Signal Voltage Gain vs. Frequency 70 Temperature Range: -0°C to 105 °C 60 AV - Small Signal Voltage Gain (dB) IK = 10 mA 50 OUT 40 15 k IK 230 Ω 9 µF 30 8.25 k 20 GND 10 0 1k 10 k 100 k 1M 10 M f - Frequency (Hz) Figure 11 Rev. 10/30/00 SPX431L TYPICAL PERFORMANCE CURVES Pulse Response 6 INPUT 5 INPUT MONITOR 220 Ω Input and Output Voltages (V) 4 OUT 3 OUTPUT 50 Ω 2 fP = 100 kHz 1 GND 0 -1 0 1 2 3 4 5 6 7 8 9 10 11 12 t - Time (µ µs) Figure 12 Stability Boundary Conditions 100 A: B: C: D: 90 VKA VKA VKA VKA = VREF = 5V at IK = 10 mA = 10V at IK = 10 mA = 15V at IK = 10 mA 80 IK - Cathode Current (mA) 70 C 150 Ω 60 IK 50 40 STABILITY REGION CL 30 10 k A 20 10 B TA = 25 °C D 0 10 0 10 1 10 2 10 3 10 4 10 5 10 6 10 7 CL - Load Capacitance (pF) Figure 13 Rev. 10/30/00 SPX431L ORDERING INFORMATION Ordering No. Precision Output Voltage SPX431LM SPX431LAM SPX431LCM SPX431LM1 SPX431LAM1 SPX431LCM SPX431LN SPX431LAN SPX431LCN SPX431LS SPX431LAS SPX431LCS 1% 0.5% 2% 1% 0.5% 2% 1% 0.5% 2% 1% 0.5% 2% 2.5V 2.5V 2.5V 2.5V 2.5V 2.5V 2.5V 2.5V 2.5V 2.5V 2.5V 2.5V Packages 5 Lead SOT-23 5 Lead SOT-23 5 Lead SOT-23 3 Lead SOT-89 3 Lead SOT-89 3 Lead SOT-89 3 Lead TO-92 3 Lead TO-92 3 Lead TO-92 8 Lead SOIC 8 Lead SOIC 8 Lead SOIC Corporation SIGNAL PROCESSING EXCELLENCE Sipex Corporation Headquarters and Main Offices: 22 Linnell Circle Billerica, MA 01821 TEL: (978) 667-8700 FAX: (978) 670-9001 e-mail: [email protected] 233 South Hillview Drive Milpitas, CA 95035 TEL: (408) 935-7600 FAX: (408) 934-7500 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 hereing; neither does it convey any license under its patent rights nor the rights of others. Rev. 10/30/00