Bay Linear, Inc 2478 Armstrong Street, Livermore, CA 94550 Tel: (925) 989-7144, Fax: (925) 940-9556 www.baylinear.com
1.5A Low Dr opout Voltage Regulator B1086
Adjustable & Fix Output Advance Information
Pin Connection
Ordering Information
Devices Package Temp.
B1086T TO-220
0 °C to 70 °C
B1086S TO-263
0 °C to 70 °C
B1086D TO-252
0 °C to 70 °C
Description
The Bay Linear B1086 is Monolithic low power 1.5A
Adjustable and fixed NPN voltage regulator that are easy to
use with minimum external components. It is suitable for
applications requiring a well-regulated positive output voltage
with low input-output differential voltage requirements and
output voltage 3.3V, 2.9V, or 2.5V.
The B1086 Outstanding features include full power usage up
to 1.5Amp of load current internal current limiting and thermal
shutdown. Other fixed versions are also available Vout=2.0 to
4.0V.
The B1086 is offered in a 3-pin TO-220, TO-263 & TO-252
packages compatible with other 3 terminal regulators. For 3A
Low dropout Regulator refer to the B1085 data sheet.
Features
• Adjustable Output Down to 1.2V
• Fixed Output Voltages 2.5V, 3.3V, and
5.0V
• Output Current of 1.5A
• Low Dropout Voltage 1.1V Typ.
• Current & Thermal Limiting
• Standard 3-Terminal Low Cost TO-220,
D2, D Packages
• Similar to indu stry Standard
LT1086/LT1586
Applications
• 3.3V to 2.5V for Pentium Processor
• SMPS Post Regulator
• High Efficiency “Green” Computer
Systems
• High Efficiency Linear Power Supplies
• 5V to 3.XXV fro Pentium Processor
• Battery Charger
Bay Linear
Bay LinearBay Linear
Bay Linear
Linea r Exc e lle nc e
Front View
TO-252 (D)
ADJ/
GND V
IN
V
OU
T
123
Top View
TO-263-3 (S)
1
Bay Linear
23
Top View
TO-263-3 (S)
1
Bay Linear
23
Top View
TO-263-3 (S)
1
Bay Linear
23
Top View
TO-263-3 (S)
1
Bay Linear
23
Bay Linear, Inc 2478 Armstrong Street, Livermore, CA 94550 Tel: (925) 989-7144, Fax: (925) 940-9556 www.baylinear.com
B1086
Absolute Maximum Rating
Parameter Symbol Value Unit
Maximum Input Voltage VIN 6 V
Power Dissipation PO Internally Limited W
Thermal Resistance Junction to Case θJC 3
Thermal Resistance Junction to
Ambient θJA 50 °C/W
Operating Junction
Temperature Range
Control Section
Power Transistor
TJ
0 to 125
0 to 150
Storage Temperature Range TSTG -65 to 150
Lead Temperature (Soldering 10
Sec.) TLEAD 260
°C
Electrical Characteristics
(VIN = 4.75V to 5.25V; IO = 10mA to 1.5Amp, unless otherwise specified)
Parameter Symbol Conditions MIN TYP MAX UNIT
3.267 3.333
Vo = 3. 3V , IO = 10mA, VIN =5V, T= 25 °C
Vo = 3. 3V , IO = 10mA, VIN =5V, Over Temp. 3.234 3.3 3.366
2.871 2.929
Vo = 2. 9V , IO = 10mA, VIN =5V, T= 25 °C
Vo = 2. 9V , IO = 10mA, VIN =5V, Over Tamp. 2.842 2.9 2.958
2.475 2.525
Output Voltage VO
Vo = 2. 5V , IO = 10mA, VIN =5V, T= 25 °C
Vo = 2. 5V , IO = 10mA, VIN =5V, Over Temp. 2.450 2.5 2.550
V
0.015 Line Regulation (1) REG ( line) IO = 10mA, VIN =5V, T= 25 °C
IO = 10mA, VIN =5V, Over Temperature 0.035 0.2
Load Regulation (1) REG (LOAD) IO = 10mA, VIN =5V, T= 25 °C
IO = 10mA, VIN =5V, Over Temperature
%
1.0 Dropout V oltag e VD T= 25 °C
Over Temperature 1.1 1.3 V
Current Surge Limit IS 2.5 A
Quiescent Current IQ VIN =5V 10 16 mA
Temperature Coefficient TC VIN =5V 0.005 %/°C
Temperature Stability TS IO = 10mA, VIN =5V 0.5 %
RMS Output Noise VN T= 25 °C, 10Hz to 10 khz 0.003 %VO
Ripple Rejection RA T= 25 °C, VIN =5V 60 70 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
Bay Linear, Inc 2478 Armstrong Street, Livermore, CA 94550 Tel: (925) 989-7144, Fax: (925) 940-9556 www.baylinear.com
Advance Information- These data sheets contain descriptions of products that are in development. The specifications are based on the engineering calculations,
computer simulations and/ or initial prototype evaluation.
Preliminary Information- These data sheets contain minimum and maximum specifications that are based on the initial device characterizations. These limits are
subject to change upon the completion of the full characterization over the specified temperature and supply voltage ranges.
The applicati on circuit examples ar e only to explain the representati ve applicatio ns of the devices and ar e not intended to guarantee any c ircuit
desi gn or permit any industrial prop erty right to other rights to execute. Bay Linear takes no responsibility for any prob lems related to any
industrial property right resulting from the use of th e conten ts shown in the data book. Typical parameters can and do vary in different
applications. Customer’s technical experts must validate all operating parameters including “ Typical” for each customer application.
LIFE SUPPORT AND NUCLEAR POLICY
Bay Linear products are not authorized for and should not be used within life support systems which are intended for surgical
implants into the body to support or sustain life, in aircraft, space eq uipment, submarine, or nuclear facility applications without
the specific written consent of Bay Linear President.
