Bay Linear Inspire the Linear Power B431 2.5V Adjustable Shunt Regulator Description Features The Bay Linear B431 is a three terminal adjustable shunt regulator with thermal stability over Temperature range. Using two external resistors allows the output voltage to be adjusted from 2.5V to 36V. With a sharp turn on characteristics the B431 a superior replacement for zener diode applications. • • • • • Wide Operating Range …1mA to100mA Tight Band Gap Tolerance …….… 0.5% Low Temp. Coefficient………..30 ppm/oC Wide temp range of –40 to +105oC Available in TO92, SOT-89, SO-8 The B431 shunt regulator has a tolerance of 0.5% which has 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 manufacturers assembly line and contribute a significant cost savings. Applications • • • • • • Package Information TO-92 (Z) 1 Ref 2 Switching Power Supplies Adjustable Power Supplies Linear Regulators Battery Powered Equipment Monitors, TV, VCR Instrumentation Ordering Information Package Tolerance 0.5% 3 Anode Cath Bottom View 1% 1% 2% B431AZ B431BZ B431DBZ B431CZ B431AR B431BR B431DBR B431CR B431AM B431BM B431DBM B431CM The Electrical Grade & Type is specified on shipping Box Only TO-92 SOT-89 8SOIC 8-Pin Surface Mount (M) 1 8 2 7 3 6 4 5 Top View Bay Linear, Inc 2418 Armstrong Street, Livermore, CA 94506 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com B431 Absolute Max Ratings Parameter Cathode Voltage Continuous Cathode Current Reference Input Current Power Dissipation at TA - 25°C SOT-89 S0-8 TO-92 Thermal Resistance S0-8 TO-92 SOT-89 Operating Junction Temperature Range Operating Ambient Temperature Storage Temperature Range Lead Temperature (Soldering) 10 seconds ESD Rating (Human Body Model) Symbol Maximum Units Vz Iz IREF 37 150 10 V mA mA PD 1000 750 775 mW OJA °C/W TJ TA TSTG 175 160 110 -40 to +150 -40 to +105 -65 to +150 TLEAD TESD 300 2 °C kV °C °C °C Recommended Operating Conditions Cathode Voltage, Vz Cathode Current, Iz Min Max Symbol VREF 0.1 36 100 V mA Electrical Characteristics Unless specified: T٨ = 25°C. Values in bold apply over full operating ambient temperature. B431 0.5% Parameter Reference Voltage VREF Temp Deviation Ratio of Change in VREF To Change in VZ Reference Input Current IREF Temperature Deviation Off-State Cathode Current Dynamic Output Impedance Minimum Operating Current Bay Linear, Inc Symbol VREF VDEV ∆ VREF ∆VZ IREF IREF(DEV) Condition VZ = VREF1 IZ = 10mA(1) VZ = VREF1 IZ = 10mA(1) IZ = 10mA,∆VZ = 10V to VRef IZ = 10mA,∆VZ = 36V to 10V R1 = 10kΩ, R2 = ∞, IZ = 10mA(2) R1 = 10kΩ, R2 = ∞, IZ = 10mA(2) Min 2.483 Typ 2.495 4 -1.0 -0.4 Max 2.507 17 -2.7 -2.0 Units V mV 0.7 4 µA 0.4 1.2 µA mV/V IZ (OFF) VREF = 0V, VZ =36V(3) 0.1 1 µA rz F <1kHz, VZ = VREF IZ = 1mA to 100mA(1) 0.20 0.50 Ω IZ(MIN) VZ = VREF(1) 0.4 1 mA 2418 Armstrong Street, Livermore, CA 94506 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com B431 B431 1% Parameter Reference Voltage VREF Temp Deviation Ratio of Change in VREF To Change in VZ Reference Input Current IREF Temperature Deviation Off-State Cathode Current Dynamic Output Impedance Minimum Operating Current Symbol VREF VDEV ∆ VREF ∆VZ IREF IREF(DEV) Condition VZ = VREF1 IZ = 10mA(1) VZ = VREF1 IZ = 10mA(1) IZ = 10mA,∆VZ = 10V to VRef IZ = 10mA,∆VZ = 36V to 10V Min 2.470 R1 = 10kΩ, R2 = ∞, IZ = 10mA(2) R1 = 10kΩ, R2 = ∞, IZ = 10mA(2) Typ 2.495 4 -1.0 -0.4 Max 2.520 17 -2.7 -2.0 Units V mV 0.7 4 µA 0.4 1.2 µA mV/V IZ (OFF) VREF = 0V, VZ =36V(3) 0.1 1 µA rz F <1kHz, VZ = VREF IZ = 1mA to 100mA(1) 0.20 0.50 Ω IZ(MIN) VZ = VREF(1) 0.4 1 mA Typ 2.495 4 -1.0 -0.4 Max 2.545 17 -2.7 -2.0 Units V mV 0.7 4 µA 0.4 1.2 µA B431 2% Parameter Reference Voltage VREF Temp Deviation Ratio of Change in VREF To Change in VZ Reference Input Current IREF Temperature Deviation Off-State Cathode Current Dynamic Output Impedance Minimum Operating Current Bay Linear, Inc Symbol VREF VDEV ∆ VREF ∆VZ IREF IREF(DEV) Condition VZ = VREF1 IZ = 10mA(1) VZ = VREF1 IZ = 10mA(1) IZ = 10mA,∆VZ = 10V to VRef IZ = 10mA,∆VZ = 36V to 10V R1 = 10kΩ, R2 = ∞, IZ = 10mA(2) R1 = 10kΩ, R2 = ∞, IZ = 10mA(2) Min 2.445 mV/V IZ (OFF) VREF = 0V, VZ =36V(3) 0.1 1 µA rz F <1kHz, VZ = VREF IZ = 1mA to 100mA(1) 0.20 0.50 Ω IZ(MIN) VZ = VREF(1) 0.4 1 mA 2418 Armstrong Street, Livermore, CA 94506 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com B431 B431D 1% Parameter Reference Voltage VREF Temp Deviation Ratio of Change in VREF To Change in VZ Symbol VREF VDEV ∆ VREF ∆VZ Condition VZ = VREF1 IZ = 10mA(1) VZ = VREF1 IZ = 10mA(1) IZ = 10mA,∆VZ = 10V to VRef IZ = 10mA,∆VZ = 36V to 10V Reference Input R1 = 10kΩ, R2 = ∞, IREF Current IZ = 10mA(2) IREF Temperature R1 = 10kΩ, R2 = ∞, IREF(DEV) Deviation IZ = 10mA(2) Off-State Cathode IZ (OFF) VREF = 0V, VZ =36V(3) Current Dynamic Output F <1kHz, VZ = VREF rz Impedance IZ = 1mA to 100mA(1) Minimum Operating IZ(MIN) VZ = VREF(1) Current Note 1: B431D is rated at -40°C to +85°C and 50ppm/°C Bay Linear, Inc 2418 Armstrong Street, Livermore, CA 94506 Min 2.470 Typ 2.495 4 -1.0 -0.4 Max 2.520 17 -2.7 -2.0 0.7 4 µA 0.4 1.2 µA 0.1 1 µA 0.20 0.50 Ω 0.4 1 mA Tel: (925) 606-5950, Fax: (925) 940-9556 Units V mV mV/V www.baylinear.com B431 mV % 0 0 ∆VREF ∆Τ -10 5000 TC in %/°C = 0.5 -20 ∆VREF (mV) TC in mV/°C = -55 -25 0 25 50 75 ∆TA TC in ppm/°C = 100 125 ∆VREF VREF at 25°C ) x 100 ∆TA ∆VREF VREF at 25°C ) 0 ) ppm Calculating Average Temperature Coefficient (TC) ) x 106 ∆TA Temperature (°C) 0.06 mV/°C 0.002 %/°C 24 ppm/°C Test Circuit VIN VKA = VREF IREF IK VIN VKA R1 VIN IK VKA IK (OFF) (VREF) R2 Figure 1a. Test Circuit 1 Bay Linear, Inc Figure 1b. Test Circuit 2 2418 Armstrong Street, Livermore, CA 94506 Figure 1c. Test Circuit 3 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com B431 TYPICAL PERFORMANCE CURVES High Current Operating Characteristics Low Current Operating Characteristics 900 150 VKA = VREF Temperature Range: - 0 to 105 °C 800 700 100 600 500 400 105 °C 300 25 °C 200 75 IK - Cathode Current (mA) IK - Cathode Current (µA) V KA = V REF Temperature Range: - 0 to 105 °C 125 50 25 0 -25 -0°C 100 -50 0 -75 -100 -100 -200 -1.0 0 1.0 2.0 -2 3.0 -1 0 2 3 Figure 3 Figure 2 Off State Leakage Reference Voltage vs. Ambient Temperature 100 2.53 VKA = 18V VREF = 0V VKA = V REF IK = 10 mA 2.52 VREF - Reference Voltage (V) IZ off - Off State Cathode Current (nA) 1 VKA - Cathode Voltage (V) VKA - Cathode Voltage (V) 10 1 0.1 2.51 2.50 VREF = 2.500 V at 25 °C 2.49 2.48 2.47 2.46 0.01 -60 -30 0 30 60 90 120 TA - Ambient Temperature ( °C) Figure 4 Bay Linear, Inc 2418 Armstrong Street, Livermore, CA 94506 2.45 -60 -30 0 30 60 90 120 TA - Ambient Temperature ( °C) Figure 5 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com B431 TYPICAL PERFORMANCE CURVES Reference Input Current VREF - Change in Reference Voltage (mV) ( IREF - Reference Input Current µA) R1 = 10 k Ω R2 = ∞ IK = 10 mA 2.5 Reference Voltage Line Regulation 0 3.0 2.0 1.5 1.0 0.5 -10 0 °C -20 25 °C 75 °C -30 105 °C -40 -50 0 -60 -30 0 30 60 90 120 0 3 6 9 12 15 TA - Ambient Temperature ( °C) VKA - Cathode Voltage (V) Figure 6 Figure 7 18 Low Frequency Dynamic Output Impedance Noise Voltage 0.150 70 VKA = VREF IKA = 1 to 100 mA f < 1 kHz 60 ZKA - Dynamic Impedance (Ω ) 0.125 Noise Voltage nV/√Hz 50 40 30 20 0.100 0.075 0.050 0.025 10 V KA = V REF IK = 10 mA TA = 25°C 0.0 0 -60 10 100 1k 10 k 100 k f - Frequency (Hz) Figure 8 Bay Linear, Inc 2418 Armstrong Street, Livermore, CA 94506 -30 0 30 60 90 120 TA - Free Air Temperature Figure 9 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com B431 TYPICAL PERFORMANCE CURVES Dynamic Output Impedance 100 ZKA - Dynamic Impedance TA = 25 °C IK = 1 to 100 mA 10 1.0 0.1 0.01 1k 10 k 100 k 10 M 1M f - Frequency (Hz) Figure 10 Small Signal Voltage Gain vs. Frequency 70 Temperature Range: -0 to 105 °C AV - Small Signal Voltage Gain (dB) 60 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 f - Frequency (Hz) Bay Linear, Inc 1M 10 M Figure 11 2418 Armstrong Street, Livermore, CA 94506 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com B431 TYPICAL PERFORMANCE CURVES Pulse Response 6 INPUT Input and Output Voltages (V) 5 INPUT MONITOR 220 Ω OUT 4 3 OUTPUT 50 Ω fP = 100 kHz 2 1 GND 0 -1 0 1 2 3 4 5 6 7 8 9 10 11 12 t - Time (µs) Figure 12 Stability Boundary Conditions 100 A: B: C: D: 90 V KA = V REF V KA = 5V at I K = 10 mA V KA = 10V at I K = 10 mA V KA= 15V at I K = 10 mA 80 IK - Cathode Current (mA) 70 C 150 Ω 60 IK 50 40 STABILITY REGION CL 30 A 20 TA = 25 °C 10 10 k B D 0 10 0 10 1 10 2 10 3 10 4 10 5 10 6 CL - Load Capacitance (pF) Bay Linear, Inc 2418 Armstrong Street, Livermore, CA 94506 107 Figure 13 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com B431 TO-92 0.090 (2.286) Radius typ. 2 1 3 0.145 (3.683) 0.135 (3.429) 0.055 (1.397) 0.045 (1.143) 10° typ. BOTTOM VIEW 0.085 (2.159) Diameter 0.185 (4.699) 0.045 (1.143) 5° typ. 0.185 (4.699) 0.175 (4.445) 0.090 (2.286) typ. 5° typ. Seating Plane 0.025 (0.635) Max Uncontrolled Lead Diameter 0.500 (12.70) Min. 0.016 (0.406) 0.014 (0.356) 0.0155 (0.3937) 0.0145 (0.3683) 0.055 (1.397) 0.045 (1.143) 0.105 (2.667) 0.095 (2.413) Bay Linear, Inc 2418 Armstrong Street, Livermore, CA 94506 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com B431 SOT-89 C A J N P 2 1 3 K B F D G -T- rr STYLE 1 PIN 1. BASE 2. COLLECTOR 3. EMITTER STYLE 3 PIN 1. GATE 2. ANODE 3. CATHODE STYLE 2 PIN 1. ANODE 2. CATHODE 3. NO CONNECTION STYLE 4 PIN 1. DRAIN 2. GATE 3. SOURCE DIM A B C D E F G J K L N P MILLIMETERS MIN MAX 4.40 4.60 2.29 2.60 140 160 0.36 0.48 1.62 1.80 0.44 0.53 150 BSC 0.35 0.44 0.80 1.04 300 BSC 2.04 2.28 3.94 4.25 INCHES MIN MAX 0.174 0.181 0.091 0.102 0.056 0.062 0.015 0.018 0.064 0.070 0.018 0.020 0.059 BSC 0.014 0.017 0.032 0.040 0.118 BSC 0.081 0.089 0.156 0.167 Advance Information- These data sheets contain descriptions of products that are in development. The specifications are based on the engineering calculations, computer simulations and/ or initial prototype evaluation. Preliminary Information- These data sheets contain minimum and maximum specifications that are based on the initial device characterizations. These limits are subject to change upon the completion of the full characterization over the specified temperature and supply voltage ranges. The application circuit examples are only to explain the representative applications of the devices and are not intended to guarantee any circuit design or permit any industrial property right to other rights to execute. Bay Linear takes no responsibility for any problems related to any industrial property right resulting from the use of the contents shown in the data book. Typical parameters can and do vary in different applications. Customer’s technical experts must validate all operating parameters including “ Typical” for each customer application. LIFE SUPPORT AND NUCLEAR POLICY Bay Linear products are not authorized for and should not be used within life support systems which are intended for surgical implants into the body to support or sustain life, in aircraft, space equipment, submarine, or nuclear facility applications without the specific written consent of Bay Linear President. Bay Linear, Inc 2418 Armstrong Street, Livermore, CA 94506 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com