Adjustable (0.40Volt Dropout) B033 Description Linear B

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Adjustable (0.40Volt Dropout) B033 Description Linear B

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1.0Amp Dropout Voltage Regulator
Adjustable (0.40Volt Dropout)
B033
Description
Linear B033 three terminal positive regulator offered adjustable voltages 1.8V, 2.5V, 3.0V, 3.3V, 5Volts. output current capability 1.0Amp,. This device been optimized voltage where transient response minimum input voltage critical. 2.85V version designed specifically used active terminators SCSI bus. Current limit trimmed ensure specified output current controlled short-circuit current. On-Chip thermal limiting provides protection against combination overload ambient temperatures that would create excessive junction temperatures. B033 offered 3-pin SOT-223, TO-252 (DPAK) packages compatible with other terminal regulators. 5-pin version TO-263 with lower dropout volt available.
Features
Adjustable Output Down 1.2V Output Current 1.0Amp Dropout 1.0V B033 Dropout 0.40 B033A Adjustable 1.8V, 2.5V, 3.0V, 3.3V, 5.0V Current Thermal Limiting Lower Cost SOT-89 Package Available SOT-223, TO-252, TO-263 Similar industry BAOOT/FP
Applications
Active SCSI terminators High efficiency Linear Regulator Post regulators Switching Supplies Battery Charger 3.3V linear Regulators Motherboard Clock Supplies
Connection
Ordering Information
Devices
B033D-X B033N-X B033T-X B033S-X
Package
TO-252 TO-223 TO-220 TO-263
Temp.
TO-252
SOT-223
SOT-223-5 SOT-223
Adj/GND Front View
Vout
Front View
Sense Adj/GND Control
VPOWER VCONTROL OUTPUT ADJ/GND. SENSE
TO-263-5 Package
Front View
Linear,
2418 Armstrong Street, Livermore, 94550 Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com
B033
Absolute Maximum Rating
Parameter
Maximum Input Voltage Operating Junction Temperature Range Storage Temperature Range Lead Temperature (Soldering Sec.)
Unit
Electrical Characteristics
(VIN TJ=25°C 10mA 1.0Amp, unless otherwise specified) Parameter Symbol Conditions
Reference Voltage B033-adj, IOUT=10mA, VIN-VOUT=2V, TJ=25°C 1.5V(VIN-VOUT) 5.75V 10mAIOUTIFULL LOAD (VOUT+1.5)VIN7V, IOUT=10mA
1.213 1.200
1.250 1.250
1.288 1.300
UNIT
Line Regulation
(line)
0.010
Load Regulation
(LOAD)
Output Voltage
(Vin-Vout)=2V 10mAIOUTIFULL LOAD B033-1.8 IOUT=10mA, VIN=3.8V, TJ=25°C 0IOUT1.0Amp, 3.2VVIN7V B033-2.5 IOUT=10mA, VIN=4.5V, TJ=25°C 0IOUT1.0Amp, 4.0VVIN7V B033-3.0 IOUT=10mA, VIN=4.85V, TJ=25°C 0IOUT1.0Amp, 4.35VVIN7V B033-3.3 IOUT=10mA, VIN=5.0V, TJ=25°C 0IOUT1.0Amp, 4.8VVIN7V B033-5.0 IOUT=10mA, VIN=6.0V, TJ=25°C 0IOUT1.0Amp, 6.5VVIN7V 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 1.5V(VIN-VOUT) 5.75V 30ms pulse 1000Hrs F=120Hz, CADJ=22µF, COUT=22µF Tantalum IOUT=IFULL LOAD, (Vin-Vout)=3V (Note
0.10 1.710 2.375 2.850 3.13 4.750 1.80 2.50 3.00 3.30 5.00
1.890 2.625 3.150 3.470 5.250
Dropout Voltage pin)
IMIN LOAD
Dropout Voltage (5pin) Current Limit Minimum Load Current Temperature Regulation Long Term Stability Temperature Stability Adjust Current Ripple Rejection Thermal Shutdown Thermal Shutdown Hysterics
0.80 0.80 0.35 0.004 0.03
1.00 1.10 0.40
0.02
Thermal Resistance Junction case SOT-223 Package °C/W
Note: Output Switch tests performed under pulsed conditions minimize power dissipation
Linear,
2418 Armstrong Street, Livermore, 94550 Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com
B033
TYPICAL CHRACTRISTICS
B033-2.85
B033-ADJ
Linear,
2418 Armstrong Street, Livermore, 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
Linear,
2418 Armstrong Street, Livermore, 94550 Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com
B033
APPLICATION NOTES EXTERNAL CAPACITOR
ensure stability B033 output capacitor least 10µF (tantalum)or 50µF (aluminum) required. value change based application requirements output load temperature range. capacitor equivalent series resistance (ESR) will effect B033 stability. value vary from type capacitor used applications. recommended value 0.5. output capacitance could increase size above minimum value. larger value output capacitance high 100µF improve load transient response. Maximum Junction Temperature range: Tambient (max) thermal resistance (Junction-toambient) Maximum Junction temperature must exceed 125°C.
(10V 2.85)(105mA) (7.15)(105mA) 750mW
SOLDERING METHODS
B033 SOT-223 package designed compatible with infrared reflow vapor-phase reflow soldering techniques. During soldering non-active mildly active fluxes used. B033 attached heat sink lead which exits opposite input, output, ground pins. Hand soldering wave soldering should avoided since these methods cause damage device with excessive thermal gradients package. SOT-223 recommended soldering method follows: vapor phase reflow infrared reflow with component preheated within 65°C soldering temperature range.
THERMAL CHARACTERISTICS
thermal resistance B033 15°C/W from junction °C/W from ambient total °C/W from junction ambient. B033 features internal thermal limiting protect device during overload conditions. Special care needs taken during continues load conditions maximum junction temperature does exceed Taking FR-4 printed circuit board 1/16 thick with ounce copper foil experiment (fig.1 fig.2), material effective transmitting heat with attached area ground plane layer backside substrate. Refer table results experiment. thermal interaction from other components application effect thermal resistance B033. actual thermal resistance determined with experimentation. B033 power dissipation calculated follows: (VIN VOUT)(IOUT)
Substrate Layout SOT-223
Linear,
2418 Armstrong Street, Livermore, 94550 Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com
B033
TOTAL BOARD AREA 2500mm 2500mm 2500mm 2500mm 2500mm 1600mm 2500mm 2500mm 1600mm 900mm 900mm TOPDIDE COPPER AREA 2500mm 1250mm 950mm 2500mm 1800mm 600mm 1250mm 915mm 600mm 240mm 240mm BACKSIDE COPPER AREA 2500mm 2500mm 2500mm 1600mm 900mm THERMAL RESISTANCE JUNCTION 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°
B033
VOUT
B033
VOUT VREF (1+R2/R1) +ADJ
LOAD
Typical Adjustable Regulator
Linear,
2418 Armstrong Street, Livermore, 94550 Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com
B033
SOT223 Package
0.124 0.116
0.146 0.295 0.130 0.264
0.0905 0.181
0.041 0.033
0.146 0.130 0.0040 0.0008 0.264 0.248
16°C 10°C 16°C 10°C
0.014 0.010
0.033 0.025
16°C 10°C
Advance Information- These data sheets contain descriptions products that development. specifications based engineering calculations, computer simulations and/ initial prototype evaluation. Preliminary Information- These data sheets contain minimum maximum specifications that based initial device characterizations. These limits subject change upon completion full characterization over specified temperature supply voltage ranges.
application circuit examples only explain representative applications devices intended guarantee circuit design permit industrial property right other rights execute. Linear takes responsibility problems related industrial property right resulting from contents shown data book. Typical parameters vary different applications. Customer's technical experts must validate operating parameters including Typical" each customer application.
LIFE SUPPORT NUCLEAR POLICY Linear products authorized should used within life support systems which intended surgical implants into body support sustain life, aircraft, space equipment, submarine, nuclear facility applications without specific written consent Linear President.
Linear,
2418 Armstrong Street, Livermore, 94550 Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com

Adjustable (0.40Volt Dropout) B033 Description Linear B

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