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B1085 Datasheet Preview

B1085 Datasheet

3.0A Low Dropout Voltage Regulator

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B1085 pdf
Bay Linear
Linear Excellence
3.0A Low Dropout Voltage Regulator
Adjustable
B1085
Description
The Bay Linear B1085 is Monolithic low power 3.0A
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 B1085 Outstanding features include full power usage up
to 3.0Amp 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 B1085 is offered in a 3-pin TO-220, TO-263 & TO-252
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 3.0A
Low Dropout Voltage 1.0V Typ.
0.015% Line Regulation
0.01% Load Regulation
Current & Thermal Limiting
Standard 3-Terminal Low Cost TO-220,
D2, D Packages
Similar to industry Standard LT1085
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
TO-252 (D)
1 23
ADJ/
GND
V OU
T
VIN
Front View
Ordering Information
Devices
B1085T
B1085S
B1085D
Package
TO-220
TO-263
TO-252
Temp.
0 °C to 70 °C
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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B1085 Datasheet Preview

B1085 Datasheet

3.0A Low Dropout Voltage Regulator

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B1085 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
B1085
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
3.2 4 A
0.2 0.5
10 10 mA
0.004 0.02 %/W
0.3 1
0.5 %
55 µA
120
75 dB
3.0 3.0 °C/W
60 60
3.0 3.0
60 60
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 B1085
Description 3.0A Low Dropout Voltage Regulator
Maker ETC
Total Page 3 Pages
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