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LT1083CK Voltage Regulator: Feature, Specification, and Datasheet Cecelia

The LT1083CK is designed to provide 7.5A, 5A, and 3A with higher efficiency than currently available devices.

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Jun 23, 2021

Tim Marner

The LT1083CK is designed to provide 7.5A, 5A, and 3A with higher efficiency than currently available devices.

LT1083CP

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LT1083CK Description

All internal circuitry is designed to operate down to 1V input-to-output differential and the dropout voltage is fully specified as a function of load current. Dropout is guaranteed at a maximum of 1.5V at maximum output current, decreasing at lower load currents. On-chip trimming adjusts the reference voltage to 1%. The current limit is also trimmed, minimizing the stress on both the regulator and power source circuitry under overload conditions. 

The LT1083 devices are pin-compatible with older 3-terminal regulators. A 10µF output capacitor is required on these new devices. However, this is included in most regulator designs. 

Unlike PNP regulators, where up to 10% of the output current is wasted as quiescent current, the LT1083 quiescent current flows into the load, increasing efficiency.

LT1083CK Features

 ■  Three-terminal adjustable 

 ■  Output current of 3A, 5A or 7.5A 

 ■  Operates down to 1V dropout 

 ■  Guaranteed dropout voltage at multiple current levels 

 ■  Line regulation: 0.015% 

 ■  Load regulation: 0.1% 

 ■  100% thermal limit functional test 

 ■  Fixed versions available 

 ■  Available in 3-lead plastic TO-220, TO-3P and DD packages

LT1083CK Applicaitons

 ■ High-efficiency linear regulators 

 ■ Post regulators for switching supplies 

 ■ Constant current regulators 

 ■ Battery chargers

Specifications

Analog Devices, Inc. LT1084CP technical specifications, attributes, parameters and parts with similar specifications to Analog Devices, Inc. LT1084CP.

LT1083CP Tech Specifications

Analog Devices, Inc. LT1083CP technical specifications, attributes, parameters and parts with similar specifications to Analog Devices, Inc. LT1083CP.

Product Attribute Attribute Value
MountThrough Hole
Package / CaseTO-247-3
Number of Pins3Pins
PackagingBulk
JESD-609 Codee0
Pbfree Codeno
Moisture Sensitivity Level (MSL)1 (Unlimited)
Number of Terminations3Terminations
ECCN CodeEAR99
Terminal FinishTin/Lead (Sn/Pb) - with Nickel (Ni) barrier
Max Operating Temperature125°C
Min Operating Temperature0°C
Terminal PositionSINGLE
Product Attribute Attribute Value
Peak Reflow Temperature (Cel)235
Number of Functions1Function
Terminal Pitch5.5mm
Time@Peak Reflow Temperature-Max (s)20
Pin Count3
Number of Outputs1Output
Qualification StatusNot Qualified
Output TypeAdjustable
Max Output Current150mA
PolarityPositive
Current - Output7.5A
Voltage - Output28.5V
Min Input Voltage2.55V
Product Attribute Attribute Value
Max Input Voltage30V
Dropout Voltage1.3V
Dropout Voltage1-Nom1.3V
Min Current Limit8A
Load Regulation-Max(%)0.4%
Voltage Reference1.262V
Input-Output Voltage Differential-Max25V
Height22.1mm
Length16.26mm
Width5.26mm
RoHS StatusRoHS Compliant
Lead FreeContains Lead
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LT1083CK Block Diagram

LT1083CK Typical Application

LT1083CK Package

LT1083CK Manufacturer

Linear Technology Corporation, a member of the S&P 500, has been designing, manufacturing and marketing a broad line of high-performance analog integrated circuits for major companies worldwide for three decades. The Company's products provide an essential bridge between our analog world and the digital electronics in communications, networking, industrial, automotive, computer, medical, instrumentation, consumer, and military and aerospace systems. Linear Technology produces power management, data conversion, signal conditioning, RF and interface ICs, µModule subsystems, and wireless sensor network products.

Datasheet PDF

Download datasheets and manufacturer documentation for Analog Devices, Inc. LT1084CP.

LT1083CP Documents

Download datasheets and manufacturer documentation for LT1083CP

Frequently Asked Questions

1.What is the efficiency of the lt1083 regulator?
The LT1083 series of positive adjustable regulators are designed to provide 7.5A with higher efficiency than currently available devices. All internal circuitry is designed to operate down to 1V input-to-output differential and the dropout voltage is fully specifi ed as a function of load current.
2.What kind of capacitor is used in the lt1083?
The circuit design used in the LT1083 family requires the use of an output capacitor as part of the device frequency compensation. For all operating conditions, the addition of a 150μF aluminum electrolytic or a 22μF solid tantalum pin instantaneously shorted to the ground can damage to occur.
3.What is the efficiency of the lt1083 quiescent current?
Unlike PNP regulators, where up to 10% of the output current is wasted as quiescent current, the LT1083 quiescent current flows into the load, increasing efficiency. Output Current of 3A, 5A or 7.5A Guaranteed Dropout Voltage at Multiple Current Levels Line Regulation: 0.015% Load Regulation: 0.1%
4.Can a crowbar circuit be used on an lt1083?
A crowbar circuit at the input of the LT1083 can generate those kinds of currents, and a diode from output to input is then recommended. Normal power supply cycling or even plugging and unplugging in the system will not generate currents large enough to do any damage.
FAQ
1.What is the efficiency of the lt1083 regulator?
The LT1083 series of positive adjustable regulators are designed to provide 7.5A with higher efficiency than currently available devices. All internal circuitry is designed to operate down to 1V input-to-output differential and the dropout voltage is fully specifi ed as a function of load current.
2.What kind of capacitor is used in the lt1083?
The circuit design used in the LT1083 family requires the use of an output capacitor as part of the device frequency compensation. For all operating conditions, the addition of a 150μF aluminum electrolytic or a 22μF solid tantalum pin instantaneously shorted to the ground can damage to occur.
3.What is the efficiency of the lt1083 quiescent current?
Unlike PNP regulators, where up to 10% of the output current is wasted as quiescent current, the LT1083 quiescent current flows into the load, increasing efficiency. Output Current of 3A, 5A or 7.5A Guaranteed Dropout Voltage at Multiple Current Levels Line Regulation: 0.015% Load Regulation: 0.1%
4.Can a crowbar circuit be used on an lt1083?
A crowbar circuit at the input of the LT1083 can generate those kinds of currents, and a diode from output to input is then recommended. Normal power supply cycling or even plugging and unplugging in the system will not generate currents large enough to do any damage.

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