ACE1085471WM+ datasheet, PDF - EEWORLD Datasheet

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ACE1085471WM+: Description3A Low Dropout Linear Regulator; File Size278KB，11 Pages; ManufacturerACE [ACE Technology Co., Ltd.]

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ACE1085471WM+ Overview

3A Low Dropout Linear Regulator

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ACE1085

Technology

Description

3A Low Dropout Linear Regulator

ACE1085 is a series of low dropout three terminal regulators with a dropout of 1.3V at 3A load current.

Other than a fixed version (Vout＝1.8V,2.5V,3.3V,5.0V）, ACE1085 has an adjustable version, The

adjustable version can set the output voltage with two external resistors.

ACE1085 offers thermal shut down and current limit functions, to assure the stability of chip and power

system. And it uses trimming technique to guarantee output voltage accuracy within ±2％.

The ACE1085 series is available in standard packages of TO-263-2L, TO-263-3L, TO-220 and TO-252.

Features

●

Other than a fixed version and an adjustable version, output value can be customized on command.

●

Maximum output current is 3A

●

Output voltage accuracy is within

±2％

（±1％

Customized）

●

Range of operation input voltage: Max 18V

●

Line regulation: 0.2％ (Typical)

●

Load regulation: 0.2％ (Typical)

●

Environment Temperature: -50℃~140℃

Application

●

Power Management for Computer Mother Board, Graphic Card

●

Battery Charger

●

Post Regulators for Switching Supplies

●

Microprocessor Supply

Absolute Maximum Ratings

Parameter

Input voltage

Junction temperature

Environment Temperature

Storage temperature

Symbol

Max

Unit

150

140

- 65 to 150 C

Packaging Type

TO-220

TO-263-3L

TO-263-2L

TO-252

VER 1.2

ACE1085

℃

Technology

Thermal

Resistance

junction to case

TO-252

TO-263

TO-220

3A Low Dropout Linear Regulator

12.5

Note1:The Parameters of Line Regulation and Load Regulation in Table1 are tested under constant junction temperature.

Note2:When Iout varies between 0~3A,Vin-Vout varies between 1.5V~6V under constant junction temperature, the parameter is

satisfied the criterion in table. If temperature varies between -50

℃

≤

TA≤140℃，it needs output current to be larger than 10mA to

satisfy the criterion.

Note3:Dropout Voltage is tested

Vdropout=Vin2-Vout2.

Note4:Minimum Load Current is defined as the minimum output current required to maintain regulation.

When 1.5V≦Vin-Vout≦6V，the device is guaranteed to regulate if the output current is greater than 10mA.

under Iout=3A and

the following testing conditions: First step is to find out the Vout

value(Vout1) when Vin1=Vout+1.5V, second step is to decrease Vin(Vin2) until Vout value is equal to 99%*Vout1(Vout2).

Detailed Description

ACE1085 is a series of low dropout voltage, three terminal regulators. Its application circuit is very simple:

the fixed version only needs two capacitors and the adjustable version only needs two resistors and two

capacitors to work. It is composed of some modules including start-up circuit, bias circuit, bandgap,

thermal shutdown, current limit, power transistors and its driver circuit and so on.

The thermal shut down and current limit modules can assure chip and its application system working

safety when the environment temperature is larger than 140

℃

or output current is larger than 3.2A.

The bandgap module provides stable reference voltage, whose temperature coefficient is compensated

by careful design considerations. The temperature coefficient is under 100ppm/℃.And the accuracy of

output voltage is guaranteed by trimming technique.

Typical Application Circuit

ACE1085 has an adjustable version and fixed versions, Chart 1 is its typical application.

Vin

ACE1085

Vout

ADJ

125 ohm

10uF

Tan

Vout

22uF

Tan

Vout=Vref * (1+R2/R1)+Iadj * R2

VER 1.2

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