LM1084

Features:

·Available in 3.3V, 5.0V, 12V and Adjustable Versions
· Current Limiting and Thermal Protection
·Output Current 5A
·Industrial Temperature Range −40°C to 125°C
·Line Regulation 0.015% (typical)
· Load Regulation 0.1% (typical)




Application

·Post Regulator for Switching DC/DC Conveter
· High Efficiency Linear Regulators
·Battery Charger

Specifications

Maximum Input to Output Voltage Differential
LM1084-ADJ ....................................................................................29V
LM1084-12 .....................................................................................18V
LM1084-3.3 ....................................................................................27V
LM1084-5.0 ....................................................................................25V
Power Dissipation (Note 2) Internally Limited
Junction Temperature (T_J)(Note 3) ............................................150°C
Storage Temperature Range .....................................-65°C to 150°C
Lead Temperature ....................................................260°C, to 10 sec
ESD Tolerance (Note 4) ...............................................................2000V

Output Current	5000 mA
Output Min	1.25, 3.3, 5 Volt
Input Min Voltage	2.6 Volt
Input Max Voltage	25, 27, 29 Volt
Dropout Voltage	1.3 Volt
Adjustable Output	No
Quiescent Current	5 mA
On/Off Pin	No
Error Flag	No
RegType	LDO
Temperature Min	-40 deg C
Temperature Max	125 deg C
Output Max	3.3, 27.5, 5 Volt
Output Voltage	3.3, 5 Volt
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Description

The LM1084 series of positive adjustable and fixed regulators are designed to provide 5A with high efficient. All internal circuitry is designed to operate down to 1.3V input to output differential. On-chip trimming adjusts the reference voltage to 1%. It's low dropout voltage and fast transient response make it ideal for low voltage microprocessor applications. Internal current and thermal limiting provides protection against any overload condition that would create excessive junction temperature.

The LM1084 is a series of low dropout voltage positive regulators with a maximum dropout of 1.5V at 5A of load current. It has the same pin-out as National Semiconductor's industry standard LM317.

The LM1084 is available in an adjustable version, which can set the output voltage with only two external resistors. It is also available in three fixed voltages: 3.3V, 5.0V and 12.0V.

The fixed versions intergrate the adjust resistors.

The LM1084 circuit includes a zener trimmed bandgap reference, current limiting and thermal shutdown.

The LM1084 series is available in TO-220 and TO-263 packages. Refer to the LM1085 for the 3A version, and the LM1086 for the 1.5A version.