Adjustable Output B1582 Description Linear B1582 Monoli

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Adjustable Output B1582 Description Linear B1582 Monoli

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4.0A Dropout Voltage Regulator
Adjustable Output
B1582
Description
Linear B1582 Monolithic power 4.0A Adjustable fixed voltage regulator that easy with minimum external components. suitable applications requiring well-regulated positive output voltage with input-output differential voltage requirements output voltage 1.5V, 2.5V, 3.0V, 3.3V, B1582 Outstanding features include full power usage 4.0Amp load current internal current limiting thermal shutdown. Other fixed versions also available consult with factory. B1582 offered 5-pin TO-220, TO-263 packages compatible with other terminal regulators.
Features
Adjustable Output Down 1.2V Fixed Output Voltages 2.5V, 3.0V 3.3V, 5.0V Output Current 4.0A Dropout Voltage 700mV Typ. Current Thermal Limiting Standard 3-Terminal Cost TO-220, Packages Similar industry Standard CS1503/EZ1582/IRU1150
Applications
3.3V 2.5V Pentium Processor SMPS Post Regulator High Efficiency "Green" Computer Systems High Efficiency Linear Power Supplies 3.XXV Pentium Processor 3.3V 2.7V Intel I740 Chip
Connection
Ordering Information
Devices
B1582T B1582S
Package
TO-220 TO-263
Temp.
VPOWER VCONTROL OUTPUT ADJ/GND. SENSE
TO-263-5 Package
Linear,
2478 Armstrong Street, Livermore, 94550 Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com
B1582
Absolute Maximum Rating
Parameter
Maximum Input Voltage Power Dissipation Thermal Resistance Junction Case Thermal Resistance Junction Ambient Operating Junction Temperature Range Control Section Power Transistor Storage Temperature Range Lead Temperature (Soldering Sec.)
Symbol
Value
Internally Limited
Unit
°C/W
TSTG TLEAD
Electrical Characteristics
(VIN 2.05V 5.25V; 10mA 4.0Amp, unless otherwise specified) Parameter Symbol Conditions
Output Voltage VCONT=4V, VPWR=2V VCONT=3V, VPWR=2.3V, ILOAD=10mA VCONT=5V, VPWR=3.3V VCONT=4V, VPWR=3.3V, ILOAD=10mA VCONT=5.5V, VPWR=3.5V VCONT=4.5V, VPWR=3.8V, ILOAD=10mA VCONT=5.8V, VPWR=3.8V VCONT=4.8V, VPWR=4.1V, ILOAD=10mA VCONT=7.5V, VPWR=5.5V VCONT=6.5V, VPWR=5.8V, ILOAD=10mA- VCONT=2.75V, VPWR=2V, ILOAD=10mA VCONT=2.7V, VPWR=3.3V 5.5V, ILOAD=10mA 10mA, =5V, 10mA, =5V, VCONT=VOUT+2.5V, ILOAD=1.5A VCONT=VOUT+2.5V, ILOAD=3.0A VCONT=VOUT+2.5V, ILOAD=4.0A (Vin-Vout)=3V 10mA, 30ms pulse TO-220 Junction Junction Ambient Package Junction Junction Ambient
1.485 1.475 2.475 2.460 2.970 2.950 3.267 3.247 4.950 4.920 1.238 1.230
1.250
1.515 1.525 2.525 2.540 3.030 3.050 3.333 3.353 5.050 5.080 1.262 1.270 0.40 0.38 0.70 0.80
UNIT
Reference Voltage
Vref
Line Regulation Load Regulation Dropout Voltage
(line) (LOAD) VPWR-VOUT
0.04 0.08 0.26 0.50 0.70 0.003
°C/W
Minimum load Current Current Limit Ground Current Temperature Stability Thermal Regulation Ripple Rejection Thermal Resistance
Imin
Note: Output Switch tests performed under pulsed conditions minimize power dissipation
Linear,
2478 Armstrong Street, Livermore, 94550 Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com
B1582
DESCRIPTION Sense Allows Kelvin sense VOUT load. (Positive side reference voltage device). Negative side reference voltage device. Adding small bypass capacitor from ground will improve transient response. VOUT Power output device. VCTRL Supply control circuitry device. current flow into this will about output current. VCTRL must between 1.0V 1.3V greater than output voltage device regulate. Output load current supplied through this pin. must between 0.1V 0.8V greater than output voltage device regulate.
BLOCK DIAGRAM
VCTRL S.O.A
CURRENT LIMIT AMPLIFIER
LIMIT SENSE VOUT
THERMAL OVERLOAD SENSE VOLTAGE REGULATION AMPLIFIER
VREF
Linear,
2478 Armstrong Street, Livermore, 94550 Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com
B1582
APPLICATIONS NOTES Adjustable Regulator Design
B1582 designed high performance cost solution application requiring lower dropout than traditional regulators. B1582 uses separate input voltage VCTRL (VCTRL VOUT+ 1.3V) minimize dropout voltage. This allows 2.5V power load come from 3.3V system supply. added benefit this will reduce heat dissipation, lower heat sink cooling cost. typical application would 3.3V VCTRL from motherboard power supply provide nominal 2.5V output. Using sense allows Kelvin measure output, reducing resistive-associated errors. B1582 power 2.5V core voltage microprocessors such Pentium, P55C, AMD5k86 PowerPC 603EV 604EV processors. 1.25V reference voltage being developed between SENSE AS1582. Adding external resistors (see will allow setting output voltage from 1.25V chosen that this current specified minimum load current 10mA. given formula: VOUT VREF R2/R1) IADJ (R2). current flowing from typically 50µA. This contributes final VOUT usually neglected. Connecting sense resistor divider will improve load regulation. Lowering Noise Using SENSE Kelvin load will increase accuracy output voltage during load regulation. fixed voltage devices, adding capacitor will improve transient response. This capacitor chosen range 0.1µF will depend amount output capacitance system.
*The reduction heat dissipation result increase regulator efficiency (efficiency VOUT VIN).
TYPICAL APPLICATION
Fig. Adjustable Regulator
3.3V 330uF
VOUT
VCTRL
LINEAR B1582
VCTRL 10uF SENSE 330uF
2.5V VOUT
.033uF
CTRL needed when measured across adjust sense.
Linear,
2478 Armstrong Street, Livermore, 94550 Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com
B1582
PACKAGE DEMENTION TO-263-5
0.176 0.005 (4.470 0.127) 0.050 0.002 (1.270 0.051)
0.055 (1.397) 0.405 0.005 (10.287 0.127)
0.356 0.005 (9.042 0.127)
0.100 0.010 (2.540 0.254)
0.600 0.025 (15.24 0.635)
0.015 0.003 (0.381 0.074)
0.067 0.005 (1.702 0.127)
0.032 0.003 (0.813 0.076)
TO-220-5
0.400 0.005 (10.16+ 0.13) 0.108 0.005 (2.74 2.74)
0.150 0.005 (3.81D 0.13)
0.175 0.005 (4.45 0.13) 0.050 0.005 (1.27 0.13)
0.250 0.005 (6.35 0.13)
0.590 (14.99
0.005 0.13)
SEATING PLANE 1.137 (28.88 REF) Typ.
0.547 0.005 (13.89 0.005)
0.067 0.005 (1.70 0.127) 0.268 (6.81 REF)
0.032 0.005 (0.81 0.13) 0.268 0.015 0.005 (0.38 0.13)
0.105 0.005 (2.67 0.13)
Linear,
2478 Armstrong Street, Livermore, 94550 Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com
B1582
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,
2478 Armstrong Street, Livermore, 94550 Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com

Adjustable Output B1582 Description Linear B1582 Monoli

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