A1084DVR-18 [AITSEMI]

BIPOLAR LDO REGULATOR 5A BIPOLAR LINEAR REGULATOR;


型号：	A1084DVR-18
厂家：	AiT Semiconductor
描述：	BIPOLAR LDO REGULATOR 5A BIPOLAR LINEAR REGULATOR
文件：	总13页 (文件大小：905K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

A1084

AiT Semiconductor Inc.

www.ait-ic.com

BIPOLAR LDO REGULATOR

5A BIPOLAR LINEAR REGULATOR

DESCRIPTION

FEATURES



Fixed and adjustable versions.

Maximum output current : 5A

A1084 is a series of low dropout three terminal

regulators with a typical dropout voltage of 1.4V at

5A load current.

Maximum input voltage: 15V

Line regulation: 0.2％ (Typical)

Load regulation: 0.2％ (Typical)

On-Chip Thermal Shutdown

Operation environment Temperature:

-40℃~ 85℃

Other than fixed voltage versions (1.8V, 2.5V, 3.3V,

5.0V), A1084 has an adjustable voltage version, with

which desired voltage can be achieved by setting the

values of two external resistors of the application

circuitry.



Available in TO-252, TO-263-2 and TO-263-3

packages

A1084 offers thermal shut down and current limit

functions to assure the stability of chip and power

system.

APPLICATION



Power Management for Computer Mother

Board, Graphic Card



Battery Charger

The A1084 is available in TO-252, TO-263-2 and

TO-263-3 packages.

Post Regulators for Switching Supplies

Microprocessor Supply

ORDERING INFORMATION

TYPICAL APPLICATION

Package Type

Part Number

A1084DR-XX

TO-252

SPQ: 2,500pcs/Reel

A1084DVR-XX

A1084S2R-XX

A1084S2VR-XX

A1084S3R-XX

A1084S3VR-XX

TO-263-2

Fig 1. A1084 fixed version application circuit

NOTE: Input capacitor (C_IN=10uF) and Output

capacitor (C_OUT=22uF) are recommended in all

application circuit. Tantalum capacitor is preferred.

SPQ: 800pcs/Reel

TO-263-3

SPQ: 800pcs/Reel

XX: Output Voltage,

18 = 1.8V, 33 = 3.3V,

ADJ: Adjustable

Note

V: Halogen free Package

R: Tape & Reel

AiT provides all RoHS products

REV1.3

- JUN 2007 RELEASED, APR 2020 UPDATED -

- 1 -

A1084

AiT Semiconductor Inc.

www.ait-ic.com

BIPOLAR LDO REGULATOR

5A BIPOLAR LINEAR REGULATOR

PIN DESCRIPTION

Top View

TO-252

Top View

TO-263-2

Top View

TO-263-3

Pin #

A1084DR-XX

A1084DR-ADJ

A1084S2R-XX

A1084S2R-ADJ

A1084S3R-XX

A1084S3R-ADJ

GND

ADJ

GND

V_OUT

V_IN

ADJ

GND

ADJ

V_OUT

V_IN

REV1.3

- JUN 2007 RELEASED, APR 2020 UPDATED -

- 2 -

A1084

AiT Semiconductor Inc.

www.ait-ic.com

BIPOLAR LDO REGULATOR

5A BIPOLAR LINEAR REGULATOR

ABSOLUTE MAXIMUM RATINGS

Max Input Voltage

15V

150°C

T_J, Operating Junction Temperature

T_A, Ambient Temperature

-40°C ~85°C

TO-252

TO-263

6°C/W

3°C/W

Package Thermal Resistance

-40°C ~150°C

T_S, Storage Temperature

Lead Temperature & Time

260°C, 10s

Stress beyond above listed “Absolute Maximum Ratings” may lead permanent damage to the device. These are stress ratings only and

operations of the device at these or any other conditions beyond those indicated in the operational sections of the specifications are not

implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

RECOMMENDED WORK CONDITIONS

Parameter

Input Voltage Range

Operating Junction Temperature

Symbol

T_J

Conditions

Min.

Typ. Max. Unit

-20

125

°C

REV1.3

- JUN 2007 RELEASED, APR 2020 UPDATED -

- 3 -

A1084

AiT Semiconductor Inc.

www.ait-ic.com

BIPOLAR LDO REGULATOR

5A BIPOLAR LINEAR REGULATOR

ELECTRICAL CHARACTERISTICS

T_J= 25°C

Parameter

Reference Voltage

Symbol

V_REF

Conditions

10mA ≤ I_OUT≤ 5A,1.5V ≤ V_IN- V_OUT≤ 5V

Min.

Typ. Max. Unit

1.225 1.25 1.275

1.773 1.80 1.827

I_OUT= 0mA, V_IN= 4.8V, T_J= 25°C

10mA ≤ I_OUT≤ 5A, 3.4V ≤ V_IN≤ 7V 1.764 1.80 1.836

1.8V

I_OUT= 0mA, V_IN= 5.5V, T_J= 25°C

10mA ≤ I_OUT≤ 5A, 4.1V ≤ V_IN≤ 7V

I_OUT= 0mA, V_IN= 6.3V, T_J= 25°C

10mA ≤ I_OUT≤ 5A, 4.9V ≤ V_IN≤ 8V 3.234 3.3

I_OUT= 0mA, V_IN= 8.0V, T_J= 25°C 4.925 5.0

10mA ≤ I_OUT≤ 5A, 6.6V ≤ V_IN≤ 10V 4.90

2.462 2.50 2.537

2.5V

3.3V

5.0V

2.45 2.50

3.25 3.3

2.55

3.350

3.366

5.075

5.10

Output Voltage

V_OUT

5.0

ADJ I_OUT= 10mA, 2.85V ≤ V_IN≤ 10V

1.8V I_OUT= 10mA, 3.4V ≤ V_IN≤ 10V

2.5V I_OUT= 10mA, 4.1V ≤ V_IN≤ 10V

3.3V I_OUT= 10mA, 4.9V ≤ V_IN≤ 10V

5.0V I_OUT= 10mA, 6.6V ≤ V_IN≤ 10V

Line Regulation

NOTE1

ΔV_OUT

ADJ connected to ground

ADJ

1.4

1.6

V_IN− V_OUT= 1.6V, 10mA ≤ I_OUT≤ 5A

1.8V V_IN− V_OUT= 1.6V, 0mA ≤ I_OUT≤ 5A

2.5V V_IN− V_OUT= 1.6V, 0mA ≤ I_OUT≤ 5A

3.3V V_IN− V_OUT= 1.6V, 0mA ≤ I_OUT≤ 5A

5.0V V_IN− V_OUT= 1.6V, 0mA ≤ I_OUT≤ 5A

Load Regulation

NOTE1, 2

ΔV_OUT

Dropout Voltage

V_IN−V_OUTΔV_OUT, ΔV_REF= 1%, I_OUT= 5A

NOTE3

REV1.3

- JUN 2007 RELEASED, APR 2020 UPDATED -

- 4 -

A1084

AiT Semiconductor Inc.

www.ait-ic.com

BIPOLAR LDO REGULATOR

5A BIPOLAR LINEAR REGULATOR

Parameter

Symbol

Conditions

Min. Typ. Max. Unit

Current Limit

V_IN− V_OUT= 3V, T_J= 25^oC

A1084-ADJ

120

I_LIMIT

Minimum Load

Current^NOTE4

μA

Quiescent Current

Adjust Pin Current

Ripple Rejection

V_IN= 10V

Adjustable Version

I_ADJ

0.4

2.85V ≤ V_IN≤ 4.25V, 10mA ≤ I_OUT≤ 5A

f = 120Hz, C_OUT= 25μF (Tan)

I_OUT= 5A, V_IN− V_OUT= 3V

10mA ≤ I_OUT≤ 5A,

Adjust Pin Current

Change

I_CHANGE

0.5

1.5V ≤ V_IN− V_OUT≤ 6V

I_OUT= 10mA,

Temperature

Stability

V_IN− V_OUT= 1.5V

Thermal

TO-252

TO-263

12.5

Resistance

θ_JC

°C/W

junction to Case

Over Temperature

Protection

OTP

150

°C

NOTE1: Line Regulation and Load Regulation are tested under constant junction temperature.

NOTE2: When load current varies between 0~5A and V_IN-V_OUTranges from 1.5V~6V at constant junction temperature, the parameter

is satisfied the criterion in table. If temperature varies between -40℃≤T_A≤85℃, it needs output current to be larger than 10mA

to satisfy the criterion.

NOTE3: Dropout Voltage is the voltage difference between the input and output pin when the input voltage is minimum to maintain the

lowest spec output voltage.

Dropout Voltage is the voltage difference between the input and output pin under I_OUT=5A and the following test condition:

1) Find out output voltage value (as V_OUT1) when V_IN1=V_OUT1+1.5V

2) Decrease input voltage until output voltage is equal to 98.5% of V_OUT1, and the V_INand V_OUTas V_IN2and V_OUT2

3) V_DROPOUT=V_IN2-V_OUT2

NOTE4: Minimum Load Current is defined as the minimum output current necessary to maintain regulation. Specified output accuracy

can be met when the output current exceeds the minimum load current (10mA) and the dropout voltage (V_IN-V_OUT) between

1.5V and 6V.

REV1.3

- JUN 2007 RELEASED, APR 2020 UPDATED -

- 5 -

A1084

AiT Semiconductor Inc.

www.ait-ic.com

BIPOLAR LDO REGULATOR

5A BIPOLAR LINEAR REGULATOR

TYPICAL PERFORMANCE CHARACTERISTICS

Dropout Voltage vs. Output Current

Output Voltage vs. Temperature

Output Voltage vs. Output Current

Load Transient Response

Line Transient Response

REV1.3

- JUN 2007 RELEASED, APR 2020 UPDATED -

- 6 -

A1084

AiT Semiconductor Inc.

www.ait-ic.com

BIPOLAR LDO REGULATOR

5A BIPOLAR LINEAR REGULATOR

BLOCK DIAGRAM

REV1.3

- JUN 2007 RELEASED, APR 2020 UPDATED -

- 7 -

A1084

AiT Semiconductor Inc.

www.ait-ic.com

BIPOLAR LDO REGULATOR

5A BIPOLAR LINEAR REGULATOR

DETAILED INFORMATION

A1084 is a series of low dropout voltage three terminal regulators. Its circuit has a trimmed bandgap reference

to ensure output voltage accuracy independent of temperature variance. On-chip thermal shutdown provides

protection against overload and conditions as elevated ambient temperature.

Its application circuitry requires minimum number of external components. Both fixed voltage and adjustable

voltage versions need input and output capacitors to assure output voltage stability. Any desired output

voltage from 1.25V to 10V can be achieved with adjustable version by assigning proper values to two external

resistors in its application circuitry (as shown in Fig.1, as R1, R2 are the two external resistors.).

Typical Application

A1084 has an adjustable version and fixed versions, Fig.1 shows their typical application circuitry.

A 10uF tan capacitor connected between input and GND as bypass capacitor and a 22uF tan capacitor

between output and GND are recommended for all application.

Using a bypass capacitor (C_ADJ) between the adjust terminal and ground can improve ripple rejection. The

bypass capacitor prevents ripple from being amplified in case the output voltage is increased. The impedance

of CA_DJshould be less than the resistance of R1 to prevent ripple from being amplified at any frequency. As

R1 is normally in the range of 120Ω~200Ω, the value of C_ADJshould satisfy the following condition:

1 / (2x Frequency_Ripplex C_ADJ) < R1

A 10μF tan capacitor is recommended.

REV1.3

- JUN 2007 RELEASED, APR 2020 UPDATED -

- 8 -

A1084

AiT Semiconductor Inc.

www.ait-ic.com

BIPOLAR LDO REGULATOR

5A BIPOLAR LINEAR REGULATOR

V_OUT= V_REFx (1+R2/R1) + I_ADJx R2

Fig 1. Typical Application of A1084

Explanation

The output voltage of adjustable version satisfies this followed equation:

V_OUT= V_REF× (1 + R₂/ R₁) + I_ADJ× R₂.

The second term I_ADJ×R₂can be ignored since the adjustable pin current I_ADJ(~ 50μA) is much less than the

current through R₁(~ 4mA).

The value of R1 is preferred in the range of 120Ω～200Ω and the total output current of the adjustable version

of A1084 needs to exceed 10mA to assure normal chip operation.

REV1.3

- JUN 2007 RELEASED, APR 2020 UPDATED -

- 9 -

A1084

AiT Semiconductor Inc.

www.ait-ic.com

BIPOLAR LDO REGULATOR

5A BIPOLAR LINEAR REGULATOR

PACKAGE INFORMATION

Dimension in TO-252 (Unit: mm)

Symbol

Min

Max

0.10

2.40

1.12

0.84

0.79

0.57

0.52

6.70

2.20

1.02

0.75

0.74

0.49

0.48

6.50

5.334 REF

4.70

9.90

6.00

4.92

10.30

6.20

5.30 REF

2.286 BSC

1.40

0.90

0.60

1.70

0°

1.60

1.25

1.00

1.90

8°

REV1.3

- JUN 2007 RELEASED, APR 2020 UPDATED -

- 10 -

A1084

AiT Semiconductor Inc.

www.ait-ic.com

BIPOLAR LDO REGULATOR

5A BIPOLAR LINEAR REGULATOR

Dimension in TO-263-2 (Unit: mm)

REV1.3

- JUN 2007 RELEASED, APR 2020 UPDATED -

- 11 -

A1084

AiT Semiconductor Inc.

www.ait-ic.com

BIPOLAR LDO REGULATOR

5A BIPOLAR LINEAR REGULATOR

Dimension in TO-263-3 (Unit: mm)

REV1.3

- JUN 2007 RELEASED, APR 2020 UPDATED -

- 12 -

A1084

AiT Semiconductor Inc.

www.ait-ic.com

BIPOLAR LDO REGULATOR

5A BIPOLAR LINEAR REGULATOR

IMPORTANT NOTICE

AiT Semiconductor Inc. (AiT) reserves the right to make changes to any its product, specifications, to

discontinue any integrated circuit product or service without notice, and advises its customers to obtain the

latest version of relevant information to verify, before placing orders, that the information being relied on is

current.

AiT Semiconductor Inc.'s integrated circuit products are not designed, intended, authorized, or warranted to

be suitable for use in life support applications, devices or systems or other critical applications. Use of AiT

products in such applications is understood to be fully at the risk of the customer. As used herein may involve

potential risks of death, personal injury, or servere property, or environmental damage. In order to minimize

risks associated with the customer's applications, the customer should provide adequate design and

operating safeguards.

AiT Semiconductor Inc. assumes to no liability to customer product design or application support. AiT

warrants the performance of its products of the specifications applicable at the time of sale.

REV1.3

- JUN 2007 RELEASED, APR 2020 UPDATED -

- 13 -

A1084DVR-18 [AITSEMI]

相关型号：

A1084DVR-33

A1084DVR-50

A1084DVR-ADJ

A1084DVR-XX

A1084PHC

A1084PHCW

A1084S2R-18

A1084S2R-33

A1084S2R-50

A1084S2R-ADJ

A1084S2R-XX

A1084S2VR-18