BAYLI BL1084T-ADJ Datasheet
Bay Linear, Inc
2478 Armstrong Street, Livermore, CA 94550 Tel: (925) 989-7144, Fax: (925) 940-9556 www.baylinear.com
7.5A Low Dropout Voltage Regulator
B1083
Adjustable
Advance Information
Pin Connection
Ordering Information
Devices Package Temp.
BL1084T TO-220
0 °C to 70 °C
Description
The Bay Linear B1083 is Monolithic low power 7.5A
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 B1083 Outstanding features include full power usage up
to 7.5Amp 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 B1083 is offered in a 3-pin TO-220, TO-263 packages
compatible with other 3 terminal regulators. For 5A Low
dropout Regulator refer to the BL1084 data sheet.
Features
• Adjustable Output Down to 1.2V
• Output Current of 7.5A
• Low Dropout Voltage 1.0V Typ.
• 0.015% Line Regulation
• 0.01% Load Regulation
• Current & Thermal Limiting
• Standard 3-Terminal Low Cost TO-220
•
Similar to industry Standard LT1083
Applications
• Constant Current Regulators
• SMPS Post Regulator
• High Efficiency Linear Regulator
• High Efficiency Linear Power Supplies
• Battery Charger
• Adjustable Power Supplies
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Plastic Package
TO-220
Front View
V
OUT
GND
V
IN
Plastic Package
TO-220
Plastic Package
TO-220
Front View
V
OUTVOUT
GND
V
INVIN
Bay Linear, Inc
2478 Armstrong Street, Livermore, CA 94550 Tel: (925) 989-7144, Fax: (925) 940-9556 www.baylinear.com
B1083
Absolute Maximum Rating
Parameter Symbol Value Unit
Maximum Input Voltage V
IN
30 V
Power Dissipation P
O
Internally Limited W
Thermal Resistance Junction to Case
θ
JC
3
Thermal Resistance Junction to
Ambient
θ
JA
50
°
C/W
Operating Junction
Temperature Range
Control Section
Power Transistor
T
J
0 to 125
0 to 150
Storage Temperature Range T
STG
-65 to 150
Lead Temperature (Soldering 10
Sec.)
T
LEAD
300
°
C
Electrical Characteristics
(VIN = 4.75V to 5.25V; IO = 10mA to 3.0Amp, unless otherwise specified)
Parameter Symbol Conditions MIN TYP MAX UNIT
1.238 1.262 Reference Voltage V
O
IO = 10mA,T= 25 °C, Vin-V
out
=3V
10mA≤I
OUT
≤
I
FULL LOAD
1.5V≤(Vin-V
out
) ≤25V (Note3)
1.225
1.250
1.270
V
Line Regulation (1) REG
(line)
I
LOAD
= 10mA, 1.5V≤(VIN – V
OUT
) ≤15V
T= 25 °C
15V≤(V
in-Vout
) ≤30V
0.015
0.035
0.05
0.20
0.20
0.50
Load Regulation (1) REG
(LOAD)
(Vin-V
out
)=3V
10mA≤I
OUT
≤
I
FULL LOAD
T= 25 °C
0.1
0.2
0.30
0.40
%
Dropout Voltage V
D
T= 25 °C
Over Temperature
1.3 1.5 V
Current Limit I
S
(Vin-V
out
)=5V
(V
in-Vout
)=25V
8.0
0.4
9.5
1.0
A
Minimum Loa d Current I
MIN LOAD
(Vin-V
out
)= 25V 10 10 mA
Temperature Regulation T
A
T= 25 °C, 30ms pulse
0.002 0.01 %/W
Long Term Stability -
T= 25 °C, 1000Hrs
0.3 1
Temperature Stability T
S
0.5 %
Adjust pin Current -
T= 25 °C
Over Temp.
55
120
µ
A
Ripple Rejection R
A
F=120Hz, C
ADJ
=25µF, C
OUT
=25µF Tantalum
I
OUT=IFULL LOAD
, (Vin-V
out
)=3V (Note 5)
60 75 dB
Thermal Resistance - TO-220 Junction to Tab
Junction to Ambient
DD Package Junction to Tab
Junction to Ambient
3.0
60
3.0
60
3.0
60
3.0
60
°
C/W
Note:
Output Switch tests are performed under pulsed conditions to minimize power dissipation
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