Bay Linear Inspire the Linear Power B033 1.0Amp Low Dropout Voltage Regulator Adjustable & Fix (0.40Volt Dropout) Description Features • • • • • The Bay Linear B033 is a three terminal positive NPN regulator offered as adjustable or fix voltages of 1.8V, 2.5V, 3.0V, 3.3V, and 5Volts. The output current has a capability up to 1.0Amp,. This device has been optimized for low voltage where transient response and minimum input voltage are critical. The 2.85V version is designed specifically to be used in active terminators for SCSI bus. Adjustable Output Down to 1.2V Output Current of 1.0Amp Low Dropout 1.0V for B033 Dropout of 0.40 V in for B033A Adjustable & Fix 1.8V, 2.5V, 3.0V, 3.3V, 5.0V Current & Thermal Limiting Lower Cost SOT-89 Package Available in SOT-223, and TO-252, & TO-263 Similar to industry BAOOT/FP • • • Current limit is trimmed to ensure specified output current and controlled short-circuit current. On-Chip thermal limiting provides protection against any combination of overload and ambient temperatures that would create excessive junction temperatures. • Applications The B033 is offered in a 3-pin SOT-223, and TO-252 (DPAK) packages compatible with other 3 terminal regulators. 5-pin version in TO-263 with lower dropout of 0.4 volt is available. • • • • • • Pin Connection Active SCSI terminators High efficiency Linear Regulator Post regulators fro Switching Supplies Battery Charger 5V to 3.3V linear Regulators Motherboard Clock Supplies Ordering Information Devices Package Temp. TO-252 TO-223 TO-220 TO-263 0 °C to 125 °C 0 °C to 125 °C 0 °C to 125 °C 0 °C to 125 °C B033D-X B033N-X B033T-X B033S-X TO-252 SOT-223 Tab VGND SOT-223-5 SOT-223 Tab V OUT 1 2 #1 Sense #2 Adj/GND #3 OUT #4 Control #5 VIN 3 Vcc GND Vout VCC GND Adj/GND OUT OUT IN Front View Front View 1 2 3 4 5 4 3 2 1 VPOWER VCONTROL OUTPUT ADJ/GND. SENSE TO-263-5 Package 5 Front View Bay Linear, Inc 2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com B033 Absolute Maximum Rating Parameter Min Max Unit 0 -65 7.0 125 150 300 V °C Maximum Input Voltage Operating Junction Temperature Range Storage Temperature Range Lead Temperature (Soldering 10 Sec.) Electrical Characteristics (VIN = 7V; TJ=25°C IO = 10mA to 1.0Amp, unless otherwise specified) Parameter Symbol Conditions Reference Voltage VO Line Regulation (1) REG (line) Load Regulation (1) REG (LOAD) Output Voltage VO Dropout Voltage (3 pin) VD Dropout Voltage (5pin) VD Current Limit IS Minimum Load Current Temperature Regulation Long Term Stability Temperature Stability Adjust pin Current Ripple Rejection IMIN LOAD TA TS RA MIN TYP MAX UNIT 1.213 1.200 -3% 1.250 1.250 1.288 1.300 +3% V V 0.010 0.6 0.10 0.9 1.710 1.80 1.890 V B033-2.5 IOUT=10mA, VIN=4.5V, TJ=25°C 0≤IOUT≤1.0Amp, 4.0V≤VIN≤7V 2.375 2.50 2.625 V B033-3.0 IOUT=10mA, VIN=4.85V, TJ=25°C 0≤IOUT≤1.0Amp, 4.35V≤VIN≤7V 2.850 3.00 3.150 V B033-3.3 IOUT=10mA, VIN=5.0V, TJ=25°C 0≤IOUT≤1.0Amp, 4.8V≤VIN≤7V 3.13 3.30 3.470 V B033-5.0 IOUT=10mA, VIN=6.0V, TJ=25°C 0≤IOUT≤1.0Amp, 6.5V≤VIN≤7V Control Input VPOWER=VOUT+0.8, ILOAD =10mA VPOWER=VOUT+0.8, ILOAD =1.0Amp, Power Input VCONTROL=VOUT-+2.5V, ILOAD=1.0Amp, (Vin-Vout)=2V 4.750 5.00 5.250 V 0.80 0.80 0.35 1.00 1.10 0.40 V B033-adj, IOUT=10mA, VIN-VOUT=2V, TJ=25°C 1.5V≤(VIN-VOUT) ≤5.75V 10mA≤IOUT≤IFULL LOAD (VOUT+1.5)≤VIN≤7V, IOUT=10mA (Vin-Vout)=2V 10mA≤IOUT≤IFULL LOAD T= 25 °C B033-1.8 IOUT=10mA, VIN=3.8V, TJ=25°C 0≤IOUT≤1.0Amp, 3.2V≤VIN≤7V 1.5V≤(VIN-VOUT) ≤5.75V T= 25 °C, 30ms pulse T= 25 °C, 1000Hrs T= 25 °C F=120Hz, CADJ=22µF, COUT=22µF Tantalum IOUT=IFULL LOAD, (Vin-Vout)=3V (Note 5) % 1.0 1.1 A 10 60 Thermal Shutdown Thermal Shutdown Hysterics 0.004 0.03 0.5 35 75 V 0.02 1.0 120 mA %/W % % µA dB °C °C 155 10 - Thermal Resistance Junction to case SOT-223 DD Package 15 3.0 15 3.0 °C/W Note: Output Switch tests are performed under pulsed conditions to minimize power dissipation Bay Linear, Inc 2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com B033 TYPICAL CHRACTRISTICS B033-2.85 B033-ADJ Bay Linear, Inc 2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com B033 TYPICAL CHRACTRISTICS (Continued) B033-2.85 B033-5.0 B033-2.85 B033-5.0 Line Transient Response Bay Linear, Inc 2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com B033 APPLICATION NOTES EXTERNAL CAPACITOR To ensure the stability of the B033 an output capacitor of at least 10µF (tantalum)or 50µF (aluminum) is required. The value may change based on the application requirements on the output load or temperature range. The capacitor equivalent series resistance (ESR) will effect the B033 stability. The value of ESR can vary from the type of capacitor used in the applications. The recommended value for ESR is 0.5Ω. The output capacitance could increase in size to above the minimum value. The larger value of output capacitance as high as 100µF can improve the load transient response. Maximum Junction Temperature range: TJ = Tambient (max) + PD* thermal resistance (Junction-toambient) Maximum Junction temperature must not exceed the 125°C. PO = (10V - 2.85)(105mA) = (7.15)(105mA) = 750mW SOLDERING METHODS The B033 SOT-223 package is designed to be compatible with infrared reflow or vapor-phase reflow soldering techniques. During soldering the non-active or mildly active fluxes may be used. The B033 die is attached to the heat sink lead which exits opposite the input, output, and ground pins. Hand soldering and wave soldering should be avoided since these methods can cause damage to the device with excessive thermal gradients on the package. The SOT-223 recommended soldering method are as follows: vapor phase reflow and infrared reflow with the component preheated to within 65°C of the soldering temperature range. 50 X 50 mm THERMAL CHARACTERISTICS The thermal resistance of B033 is 15°C/W from junction to tab and 31 °C/W from tab to ambient for a total of 46 °C/W from junction to ambient. The B033 features the internal thermal limiting to protect the device during overload conditions. Special care needs to be taken during continues load conditions the maximum junction temperature does not exceed 125 °C. Taking the FR-4 printed circuit board and 1/16 thick with 1 ounce copper foil as an experiment (fig.1 & fig.2), the PCB material is effective at transmitting heat with the tab attached to the pad area and a ground plane layer on the backside of the substrate. Refer to table 1 for the results of the experiment. The thermal interaction from other components in the application can effect the thermal resistance of the B033. The actual thermal resistance can be determined with experimentation. B033 power dissipation is calculated as follows: 35 X 17 mm 16 X 10 mm Substrate Layout for SOT-223 PD = (VIN - VOUT)(IOUT) Bay Linear, Inc 2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com B033 TOTAL PC BOARD AREA TOPDIDE COPPER AREA BACKSIDE COPPER AREA 2500mm 2500mm 2500mm 2500mm 2500mm 1600mm 2500mm 2500mm 1600mm 900mm 900mm 2500mm 1250mm 950mm 2500mm 1800mm 600mm 1250mm 915mm 600mm 240mm 240mm 2500mm 2500mm 2500mm 0 0 1600mm 0 0 0 900mm 0 VIN IN C1 BAY B033 VOUT OUT C2 ADJ VIN THERMAL RESISTANCE JUNCTION TO AMBIENT 46°C/W° 47°C/W° 49°C/W° 51°C/W° 53°C/W° 55°C/W° 58°C/W° 59°C/W° 67°C/W° 72°C/W° 85°C/W° BAY B033 IN OUT C1 ADJ R1 R1 VOUT = VREF (1+R2/R1) +ADJ R2 R2 LOAD Typical Adjustable Regulator 1 0A Bay Linear, Inc C 2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 t t t www.baylinear.com B033 SOT223 Package 0.124 0.116 0.146 0.295 0.130 0.264 0.041 0.033 0.0905 NOM 0.181 NOM 0.146 0.130 0.0040 0.0008 0.264 0.248 16°C 10°C 16°C 10°C Max 0.033 0.025 0.014 0.010 16°C 10°C 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 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com