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B1084

5.0A Low Dropout Voltage Regulator



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B1084 pdf
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Bay Linear
Linear Excellence
5.0A Low Dropout Voltage Regulator
Adjustable
B1084
Advance Information
Description
The Bay Linear B1084 is Monolithic low power 5.0A
Adjustable and fixed NPN voltage regulator that are easy to
use with minimum external components. All internal circuitry
is designed to operate down to 1V input to output differential
and the dropout voltage is fully specified as a function of load
current. Dropout is guaranteed at a maximum of 1.5V at a
maximum output current. Current limit is trimmed, minimizing
the stress on both the regulator and power source circuitry
under overload conditions. It is suitable for applications
requiring a well-regulated positive output voltage with low
input-output differential voltage.
The B1084 Outstanding features include full power usage up
to 5.0Amp of load current internal current limiting and thermal
shutdown. A 10 µF output capacitor is required on these new
devices; how ever, this is usually included in most regulator
design.
The B1084 is offered in a 3-pin TO-220, TO-263 packages
compatible with other 3 terminal regulators. For 7A Low
dropout Regulator refer to the BL1083 data sheet.
Features
Adjustable Output Down to 1.2V
Output Current of 5.0A
Low Dropout Voltage 1.0V Typ.
0.015% Line Regulation
0.01% Load Regulation
Current & Thermal Limiting
Standard 3-Terminal Low Cost TO-220,
D2Packages
Similar to industry Standard LT1084
Applications
Constant Current Regulators
SMPS Post Regulator
High Efficiency Linear Regulator
High Efficiency Linear Power Supplies
Battery Charger
Adjustable Power Supplies
Pin Connection
TO-263-3 (S)
Bay Linear
123
Top View
Ordering Information
Devices
B1084T
B1084S
Package
TO-220
TO-263
Temp.
0 °C to 70 °C
0 °C to 70 °C
Bay Linear, Inc 2478 Armstrong Street, Livermore, CA 94550 Tel: (925) 989-7144, Fax: (925) 940-9556
www.baylinear.com



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B1084 pdf
Absolute Maximum Rating
Parameter
Maximum Input Voltage
Power Dissipation
Thermal Resistance Junction to Case
Thermal Resistance Junction to
Ambient
Operating Junction
Temperature Range
Control Section
Power Transistor
Storage Temperature Range
Lead Temperature (Soldering 10
Sec.)
Symbol
VIN
PO
θJC
θJA
TJ
TSTG
TLEAD
Value
30
Internally Limited
3
50
0 to 125
0 to 150
-65 to 150
300
B1084
Unit
V
W
°C/W
°C
Electrical Characteristics
(VIN = 4.75V to 5.25V; IO = 10mA to 3.0Amp, unless otherwise specified)
Parameter
Symbol Conditions
Reference Voltage
Line Regulation (1)
Load Regulation (1)
VO
REG (line)
REG (LOAD)
IO = 10mA,T= 25 °C, Vin-Vout =3V
10mAIOUTIFULL LOAD
1.5V(Vin-Vout) 25V (Note3)
ILOAD = 10mA, 1.5V(VIN – VOUT) 15V
T= 25 °C
15V(Vin-Vout) 30V
(Vin-Vout)=3V
10mAIOUTIFULL LOAD
T= 25 °C
Dropout Voltage
VD T= 25 °C
Over Temperature
Current Limit
Minimum Load Current
Temperature Regulation
Long Term Stability
Temperature Stability
Adjust pin Current
Ripple Rejection
Thermal Resistance
IS
IMIN LOAD
TA
-
TS
-
RA
-
(Vin-Vout)=5V
(Vin-Vout)=25V
(Vin-Vout)= 25V
T= 25 °C, 30ms pulse
T= 25 °C, 1000Hrs
T= 25 °C
Over Temp.
F=120Hz, CADJ=25µF, COUT=25µF Tantalum
IOUT=IFULL LOAD, (Vin-Vout)=3V (Note 5)
TO-220
Junction to Tab
Junction to Ambient
DD Package
Junction to Tab
Junction to Ambient
MIN
1.238
1.225
60
TYP MAX UNIT
1.250 1.262 V
0.015
0.035
0.05
1.270
0.20
0.20
0.50
%
0.1 0.30
0.2 0.40
1.3 1.5 V
5.5
0.3
10
0.003
0.3
0.5
55
75
3.0
60
3.0
60
6.5
0.6
10
0.015
1
120
3.0
60
3.0
60
A
mA
%/W
%
µA
dB
°C/W
Note: Output Switch tests are performed under pulsed conditions to minimize power dissipation
Bay Linear, Inc 2478 Armstrong Street, Livermore, CA 94550 Tel: (925) 989-7144, Fax: (925) 940-9556
www.baylinear.com



Part Number B1084
Description 5.0A Low Dropout Voltage Regulator
Maker ETC - ETC
Total Page 3 Pages
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