BL1084
5A Bipolar Linear Regulator
DESCRIPTION
BL1084 is a series of low dropout three
terminal regulators with a typical dropout
voltage of 1.4V at 5A load current.
Other than fixed voltage versions (1.8V, 2.5V,
3.3V, 5.0V), BL1084 has an adjustable
voltage version, with which desired voltage
can be achieved by setting the values of two
external resistors of the application circuitry.
BL1084 offers thermal shut down and current
limit functions to assure the stability of chip
and power system.
BL1084 series is available in standard
packages of TO-263-2L, TO-263-3L, TO-220
and TO-252.
FEATURES
Fixed and adjustable versions.
Maximum output current : 5A
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
ELECTRICAL CHARACTERISTICS
1.5
1.4
Dropout(V)
BL1084
1.3
1.2
1.1
1
0.9
0.8
0.5
1.5
2.5
Iout(A)
3.5
4.5
Fig 1. BL1084 fixed version Application circuit
NOTE: Input capacitor (Cin=10uF) and Output
capacitor (Cout=22uF) are recommended in all
application circuit. Tantalum capacitor is
preferred.
Fig 2. Dropout Voltage VS. Output Current
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