Bay Linear Inspire the Linear Power B432 1.25V Adjustable Shunt Regulator Description Features The B432 is a three terminal adjustable shunt regulator with thermal stability of 50ppm/°C. The output voltage can be adjusted to any value from 1.25V (VREF) to 15V with two external resistors. The B432 is an ideal voltage reference in an isolated feedback circuit for 3.0V switch mode power supplies The B432 shunt regulator is available with three voltage tolerances (0.5%, 1.0% and 2.0%) and three package options (SOT-23-3, TO-92, 8SOIC). This allows the designer the opportunity to select the optimum combination of cost and performance for their application. • • • • Low voltage operation (down to 1.25V) Wide operating current….1mA to 100mA Trimmed bandgap design ± 0.5% Wide temperature range 0°°C to +105°°C Available in SOT-23-3, TO-92 , 8SOIC Upgrade for TLV431A & Cross AS432 • • Applications • • • • • • Pin Connection Switching Power Supplies Adjustable Power Supplies Linear Regulators Battery Powered Equipment Monitors, TV, VCR Instrumentation Ordering Information Package TO-92 SO-8 SOT-23 0.5% B432AZ B432AM B432AK3 Tolerance 1% B432BZ B432BM B432BK3 2% B432CZ B432CM B432CK3 SOT-23-3 (K3) TO-92 (Z) 1 2 Anode 3 BAY Ref Anode Bottom View Bay Linear, Inc Cathode Ref Cathode Top View 2478 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com B432 Absolute Maximum Rating Parameter Cathode Voltage Continuous Cathode Current Power Dissipation at TA - 25°C SOT-23-3 S0-8 TO-92 Thermal Resistance SOT-23-3 S0-8 TO-92 Operating Junction Temperature Range Storage Temperature Range Lead Temperature (Soldering) 10 seconds ESD Rating (Human Body Model) Symbol Maximum Units Vz Iz 18 100 V mA PD 200 750 775 mW OJA 575 175 160 -40 to +150 -65 to +150 300 2 °C/W TJ TSTG TLEAD TESD °C °C °C kV Recommended Operating Conditions Cathode Voltage, Vz Cathode Current, Iz Min Max Symbol VREF 1.0 15 100 V mA Electrical Characteristics Unless specified: T٨ = 25°C. Values in bold apply over full operating ambient temperature. B432 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 Min Operating Current Bay Linear, Inc Symbol VREF Condition VZ = VREF1 IZ = 10mA(1) VDEV Typ 1.250 Max 1.257 Units V VZ = VREF1 IZ = 10mA(1) 2 16 mV Δ VREF ΔVZ IZ = 10mA,ΔVZ = 15V to VRef -1.5 -2.7 mV/V IREF R1 = 10kΩ, R2 = ∞, IZ = 10mA(2) R1 = 10kΩ, R2 = ∞, IZ = 10mA(2) 3 6 µA 0.3 0.6 µA VREF = 0V, VZ =15V(3) 0.05 500 VZ = VREF(1) 0.6 1 IREF(DEV) Min 1.243 IZ (OFF) IZ(MIN) nA 2478 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 mA www.baylinear.com B432 Electrical Characteristics Unless specified: T٨ = 25°C. Values in bold apply over full operating ambient temperature. B432 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 Symbol VREF Condition VZ = VREF1 IZ = 10mA(1) VDEV Typ 1.250 Max 1.262 Units V VZ = VREF1 IZ = 10mA(1) 2 16 mV Δ VREF ΔVZ IZ = 10mA,ΔVZ = 15V to VRef -1.5 -2.7 mV/V IREF R1 = 10kΩ, R2 = ∞, IZ = 10mA(2) R1 = 10kΩ, R2 = ∞, IZ = 10mA(2) 3 6 µA 0.3 0.6 µA VREF = 0V, VZ =15V(3) 0.05 500 VZ = VREF(1) 0.6 1 mA Typ 1.250 Max 1.275 Units V IREF(DEV) Min 1.237 IZ (OFF) Min Operating Current IZ(MIN) nA Unless specified: T٨ = 25°C. Values in bold apply over full operating ambient temperature. B432 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 Min Operating Current Bay Linear, Inc Symbol VREF Condition VZ = VREF1 IZ = 10mA(1) VDEV VZ = VREF1 IZ = 10mA(1) 2 16 mV Δ VREF ΔVZ IZ = 10mA,ΔVZ = 15V to VRef -1.5 -2.7 mV/V IREF R1 = 10kΩ, R2 = ∞, IZ = 10mA(2) R1 = 10kΩ, R2 = ∞, IZ = 10mA(2) 3 6 µA 0.3 0.6 µA VREF = 0V, VZ =15V(3) 0.05 500 VZ = VREF(1) 0.6 1 IREF(DEV) Min 1.225 IZ (OFF) IZ(MIN) nA 2478 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 mA www.baylinear.com B432 VREF Vin Vin 10nf Vout 10nf I (OFF) IK R1 Iref R 2 VREF Test Circuit for VKA > VREF Test Circuit for I OFF VO = VKA = VREF x (1 + R1/R2) - IREF x R1 +3.3V 0.1µF 470µF PHD 3055E +12V 500Ω 2.7V 140Ω 0.1µF 0.1µF 0.1µF B431L 120Ω INTEL I 740 1000µF *If the output voltage has noise, then please add a 0.1µF in between drain and gate of power MOSFET to reduce the noise. Bay Linear, Inc 2478 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com B432 SOT-23 0.015 - 0.018 (0.381 - 0.457) 0.047 - 0.055 0.083 - 0.098 (1.194 - 1.397) (2.108 - 2.489) 0.035 - 0.040 (0.889 - 1.016) 0.020 - 0.024 (0.508 - 0.610) 0.070 - 0.080 (1.778 - 2.032) 0.110 - 0.120 (2.794 - 3.048) 0.001 - 0.004 (0.025 - 0.102) 0.003 - 0.005 (0.076 - 0.127) 0.030 - 0.041 (0.762 - 1.041) 0.018 - 0.024 (0.457 - 0.610) 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 2478 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com