3.0A Low Dropout Voltage Regulator

B1085
Adjustable























Pin Connection













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,
D
2
, 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

Bay Linear
Linear Excellence

TO-252 (D)
1 23
TO-263-3 (S)
1
Bay Linear
2 3
Front View
ADJ/
GND
V
IN
V OU
T

Bay Linear, Inc 2478 Armstrong Street, Livermore, CA 94550 Te



Top View

Ordering Information

Devices Package Temp.
B1085T TO-220 0 °C to 70 °C
B1085S TO-263 0 °C to 70 °C
B1085D TO-252 0 °C to 70 °C







l: (925) 989-7144, Fax: (925) 940-9556 www.baylinear.com