BL1085 Datasheet PDF - SHANGHAI BELLING

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BL1085
SHANGHAI BELLING

Part Number BL1085
Description 3A Bipolar Linear Regulator
Page 13 Pages


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BL1085
DESCRIPTION
BL1085 is a series of low dropout three
terminal regulators with a typical dropout
voltage of 1.4V at 3A load current.
Other than fixed voltage versions (1.8V, 2.5V,
3.3V, 5.0V), BL1085 has an adjustable
voltage version, with which desired voltage
can be achieved by setting the values of two
external resistors of the application circuitry.
BL1085 offers thermal shut down and current
limit functions to assure the stability of chip
and power system.
BL1085 series is available in standard
packages of TO-263-2L, TO-263-3L, TO-220
and TO-252.
3A Bipolar Linear Regulator
FEATURES
Fixed and adjustable versions.
Maximum output current : 3A
Maximum input voltage: 15V
Line regulation: 0.2(Typical)
Load regulation: 0.2(Typical)
On-Chip Thermal Shutdown
Operation environment Temperature: -10
~ 85
APPLICATIONS
Power Management for Computer Mother
Board, Graphic Card
Battery Charger
Post Regulators for Switching Supplies
Microprocessor Supply
TYPICAL APPLICATION
BL1085
Fig 1. BL1085 fixed version Application circuit
NOTE: Input capacitor (Cin=10uF) and Output
capacitor (Cout=22uF) are recommended in all
application circuit. Tantalum capacitor is
preferred.
ELECTRICAL CHARACTERISTICS
1.5
1.4
1.3
1.2
1.1
1
0.9
0.8
0.5 1.5 2.5 3.5 4.5
Iout(A)
Fig 2. Dropout Voltage VS. Output Current
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BL1085
ORDERING INFORMATION
BL1085 1 2 3
Code
1
2
3
Description
Output voltage:
e.g. 18=1.8V
33=3.3V
Default=Adjustable Version
Temperature&Rohs:
C: -40~85C ,Pb Free Rohs Std.
Package type:
Y:TO-252
S:TO-263-2L
S1:TO-263-3L
Z:TO-220-3L
ABSOLUTE MAXIMUM RATING
Parameter
Value
Max Input Voltage
15V
Operating Junction
Temperature(Tj)
150C
Ambient Temperature(Ta)
-40C 85C
Package
Thermal
Resistance
TO-252
TO-263
TO-220
6/ W
3/ W
3/ W
Storage Temperature(Ts)
Lead Temperature & Time
-40C -150C
260C,10S
Note:
Exceed these limits to damage to the device. Exposure
to absolute maximum rating conditions may affect
device reliability.
RECOMMENDED WORK CONDITIONS
Parameter
Value
Input Voltage Range
Max.15V
Operating Junction
-10C 125C
Temperature(Tj)
PIN CONFIGURATION
Pin Description
Fixed Version
Pin No. Symbol Definition
1 GND Ground
2 Vout Output
3 Vin Input
Adjustable Version
Pin No. Symbol Definition
1 Adj. Adjustable
2 Vout Output
3 Vin Input
Marking information
AMeans assembly year and weeks
Year 2010 2011 2012 2013
Y 0 1 2 3
Week 1 2
W AB
26 27 52
Z
BMeans Manufacture LOT No.
CMeans Output Voltage Value
DMeans Temp. Range&Rohs Std
53
A
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ELECTRICAL CHARACTERISTICS
Symbol
Vref
Parameter
Reference
Voltage
Vout
Output Voltage
Conditions
10mA≤Iout≤3A ,1.5V≤Vin-Vout≤5V
BL1085-1.80V
Iout=0mA,Vin=4.8V,Tj=25
10mA≤Iout≤3A ,3.4V≤Vin≤7V
BL1085-2.50V
Iout=0mA,Vin=5.5V,Tj=25
10mA≤Iout≤3A ,4.1V≤Vin≤7V
BL1085-3.3V
Iout=0mA,Vin=6.3V,Tj=25
10mA ≤Iout≤3A ,4.9V≤Vin≤8V
BL1085-5.0V
Iout=0mA,Vin=8.0V,Tj=25
10mA ≤Iout≤3A ,6.6V≤Vin≤10V
BL1085-ADJ
Iout=10mA, 2.85V≤Vin≤10V
BL1085-1.8V
Iout=10mA, 3.4V≤Vin≤10V
ΔVout
Line Regulation
(note 1)
BL1085-2.5V
Iout=10mA, 4.1V≤Vin≤10V
BL1085-3.3V
Iout=10mA, 4.9V≤Vin≤10V
BL1085-5.0V
Iout=10mA, 6.6V≤Vin≤10V
BL1085-ADJ (ADJ connected to ground)
Vin-Vout=1.6V, 10mA≤Iout≤3A
ΔVout
Load Regulation
(note 1,2)
BL1085-1.8V
Vin-Vout=1.6V, 0≤Iout≤3A
BL1085-2.5V
Vin-Vout=1.6V, 0≤Iout≤3A
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BL1085-3.3V
Vin-Vout=1.6V, 0≤Iout≤3A
BL1085-5.0V
Vin-Vout=1.6V, 0≤Iout≤3A
3
BL1085
Tj=25
Min Typ Max Unit
1.225 1.25 1.275
V
1.773 1.80 1.827
1.764 1.80 1.836
V
2.462 2.50 2.537
2.45 2.50 2.55
V
3.25 3.3 3.350
3.234 3.3 3.366
V
4.925 5.0 5.075
4.90 5.0 5.10
V
10 40 mV
10 40 mV
10 40 mV
10 40 mV
10 40 mV
16 50 mV
16 50 mV
16 50 mV
16 50 mV
16 50 mV



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BL1085
Vin-Vout
Ilimit
Iq
Dropout Voltage
(note 3)
Current Limit
Minimum
Load Current
(note 4)
Quiescent
Current
ΔVout, ΔVref =1%Iout=3A
Vin-Vout=3V, Tj=25
BL1085-ADJ
Vin=10V
1.4 V
7A
3 10 mA
5 10 mA
IAdj
Adjust Pin Current
(Adjustable Version)
Ripple
Rejection
Ichange
JC
OTP
Adjust Pin
Current
Change
Temperature
Stability
Thermal
Resistance
junction to case
Over
Temperature
Protection
2.85V Vin4.25V, 10mA≤ Iout≤3A
F=120Hz,Cout=25uF( tan),
Iout=3A,Vin-Vout=3V
10mA≤Iout≤3A
1.5V≤Vin-Vout ≤6V
Iout=10mA,
Vin-Vout=1.5V
TO-252
TO-263
TO-220
45 120 uA
60 dB
0.4 10 µA
0.5 %
12.5
3 /W
3
150
Note1: Line Regulation and Load Regulation in Table1 are tested under constant junction temperature.
Note2: When load current varies between 0~3A and Vin-Vout ranges from 1.5V~6V at constant junction
temperature, the parameter is satisfied the criterion in table. If temperature varies between -40TA85℃,
it needs output current to be larger than 10mA to satisfy the criterion.
Note3: Dropout Voltage is the voltage difference between the input and output pin when the input voltage is
minimum to maintain the lowest spec output voltage.
Dropout Voltage is the voltage difference between the input and output pin under Iout=3A and the following
test condition:
1) Find out output voltage value ( denoted as Vout1) when Vin1=Vout+1.5V
2) Decrease input voltage until output voltage is equal to 98.5% of Vout1, and denote the Vin and Vout as
Vin2 and Vout2.
3) Vdropout=Vin2-Vout2.
Note4: Minimum Load Current is defined as the minimum output current necessary to maintain regulation.
Specified output accuracy can be met when the output current exceeds the minimum load current (10mA)
and the dropout voltage (Vin-Vout) lies between 1.5V and 6V.
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