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PDF ( 数据手册 , 数据表 ) LR1084

零件编号 LR1084
描述 Low dropout positive voltage regulators
制造商 LRC
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LR1084 数据手册, 描述, 功能
LESHAN RADIO COMPANY, LTD.
LR1084
General Description
Features
The LR1084 is a series of low dropout positive voltage g Low Dropout Voltage: 1.3V Typically at 5A
regulators with a maximum dropout of 1.5V at 5A of g Current Limiting and Thermal Protection
load current.
g Output Current: 5A
The series features on-chip thermal limiting which pro- g Current Limit: 6.5A
vides protection against any combination of overload g Operating Junction Temperature Range: 0 to
and ambient temperatures that would create excessive
125oC
junction temperatures. It also includes a trimmed band- g Line Regulation: 0.015% (Typical)
gap reference and a current limiting circuit.
g Load Regulation: 0.2% (Typical)
The LR1084 is available in 1.5V, 1.8V, 2.5V, 2.85V,
3.3V and 5.0Vversions. The fixed versions integrate
the adjust resistors. It is also available in an adjustable
version which can set the output voltage with two
external resistors.
The LR1084 series is available in standard packages of
TO-263-2L, TO-263-3L, TO-220 and TO-252.
Applications
g High Efficiency Linear Regulators
g Battery Chargers
g Post Regulation for Switching Supply
g Microprocessor Supply
g Desktop PCs, RISC and Embedded Processors'
Supply
TO-263-3L
TO-263-2L
TO-252
Figure 1. Package Types of LR1084
TO-220
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LR1084 pdf, 数据表
LESHAN RADIO COMPANY, LTD.
LR1084
Typical Applications
Adjustable Output Voltage VOUT=VREF*(1+R2/R1)+IADJ*R2 Or VOUT=VREF(1+R2/R1) , VREF=1.25V
VIN 3
2 VOUT
IN LR1084-XX OUT
10UF
1
22UF
Fig 11. Fixed Output Regulator
VIN
10UF
32
IN LR1084-ADJ OUT
ADJ
1
R1
120
VOUT=1.25V
22UF
FIG 12 . Adjustable Output 1.25 Voltage Application Circuit
VIN
10UF
32
IN LR1084-ADJ OUT
ADJ
1
R1
120
R2
VREF
VOUT
22UF
FIG 13 . Adjustable Output Voltage Application Circuit
VIN
10UF
32
IN LR1084-ADJ OUT
ADJ
1
R1
120
VREF
R2
10UF
VOUT
22UF
FIG 14 . Adjustable Output Voltage Application with improved Ripple Rejection
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