SPX29301T5-L-5-0 [EXAR]

Fixed Positive LDO Regulator, 5V, 0.7V Dropout, PSSO5, LEAD FREE, TO-263BA, 5 PIN;


型号：	SPX29301T5-L-5-0
厂家：	EXAR CORPORATION
描述：	Fixed Positive LDO Regulator, 5V, 0.7V Dropout, PSSO5, LEAD FREE, TO-263BA, 5 PIN 输出元件调节器
文件：	总10页 (文件大小：649K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

SPX29300/01/02

3A Low Dropout Voltage Regulator

December 2016

Rev. 2.2.0

GENERAL DESCRIPTION

APPLICATIONS

The SPX29300/01/02 are 3A, highly accurate

voltage regulators with a low dropout voltage of

600mV (typical) at 3A.

• Adjustable Power Supplies

• Constant Current Regulators

• Audio and Video/Graphic Cards

• Battery Chargers

These regulators are specifically designed for

low voltage applications that require a low

dropout voltage and a fast transient response.

They are fully fault protected against over-

current, reverse battery, and positive and

negative voltage transients. On-Chip trimming

adjusts the reference voltage to 1% initial

accuracy.

FEATURES

• 3A Guaranteed Output Current

• Low Dropout Voltage of 600mV @ 3A

• Adjustable Output down to 1.25V

• 1% Output Accuracy

The SPX29300 is offered in a 3-pin TO-263

package, the SPX29301 and SPX29302 are

offered in a 5-pin TO-263 package.

• Tight Load and Line Regulation

• Fast Transient Response

• Reverse Battery Protection

• Zero Current Shutdown (SPX29301/02)

• Power Good Flag (SPX29301)

• Lead Free 3-Pin TO-263 and 5-pin TO-

263 Packages

TYPICAL APPLICATION DIAGRAM

Fig. 1: SPX29300 and SPX29302 Application Diagrams

Exar Corporation

48720 Kato Road, Fremont CA 94538, USA

www.exar.com

Tel. +1 510 668-7000 – Fax. +1 510 668-7001

SPX29300/01/02

3A Low Dropout Voltage Regulator

ABSOLUTE MAXIMUM RATINGS

OPERATING RATINGS

These are stress ratings only and functional operation of

the device at these ratings or any other above those

indicated in the operation sections of the specifications

below is not implied. Exposure to absolute maximum rating

conditions for extended periods of time may affect

reliability.

Input Voltage Range V_IN...........................................16V

Junction Temperature Range....................-40°C to 125°C

Thermal Resistance......................................................

TO-263-3 Junction to Ambient........................31.4°C/W

TO-263-5 Junction to Ambient........................31.2°C/W

TO-263-3, TO-263-5 Junction to Case ................. 3°C/W

Input Voltage V_IN¹................................................... 20V

Storage Temperature.............................. -65°C to 150°C

Lead Temperature (Soldering, 5 sec) .....................260°C

ESD Rating (HBM - Human Body Model)..........................

All pins except EN................................................. 2kV

En pin................................................................. 1kV

Note 1: Maximum positive supply voltage of 20V must be

of limited duration (<100ms) and duty cycle of less than

1%. The maximum continuous supply voltage is 16V.

ELECTRICAL SPECIFICATIONS

Specifications with standard type are for an Operating Junction Temperature of T_J= T_A= 25°C only; limits applying over the

full Operating Junction Temperature range are denoted by a “•”. Minimum and Maximum limits are guaranteed through test,

design, or statistical correlation. Typical values represent the most likely parametric norm at T_J= 25°C, and are provided for

reference purposes only. Unless otherwise indicated, V_IN= V_OUT+ 1V and I_OUT=10mA, C_IN= 6.8µF, C_OUT= 10µF, T_A= 25°C.

Parameter

Min.

Typ.

Max.

Units

Conditions

Fixed Voltage Versions

1.800

2.500

3.300

5.000

1.818

1.836

2.525

2.550

3.333

3.366

5.050

5.100

I_OUT=10mA

1.782

1.764

2.475

2.450

3.267

3.234

4.950

4.900

Output Voltage, 1.8V Version

Output Voltage, 2.5V Version

Output Voltage, 3.3V Version

Output Voltage, 5.0V Version

•

10mA≤I_OUT≤3A, 2.8V≤V_IN≤16V

I_OUT=10mA

10mA≤I_OUT≤3A, 3.5V≤V_IN≤16V

I_OUT=10mA

10mA≤I_OUT≤3A, 4.3V≤V_IN≤16V

I_OUT=10mA

10mA≤I_OUT≤3A, 6.0V≤V_IN≤16V

All Voltage Versions

Line Regulation

Load Regulation

ΔV/ΔT

0.06

0.2

0.5

I_OUT=10mA, (V_OUT+1V)≤V_IN≤16V

V_IN=V_OUT+ 1V, 10mA≤I_OUT≤I_FL(note 2)

V_OUTTemp Coefficient (note 6)

I_OUT=100mA

•

100

300

ppm/˚C

120

380

600

Dropout Voltage

Except 1.8V Version (note 3)

I_OUT=1.5A

•

800

I_OUT=3A

I_OUT=1.5A

Ground Current (note 5)

I_OUT=3A

Ground Pin Current at Dropout

Current Limit

0.9

4.5

400

260

V_IN= 0.5V less than specified V_OUTI_OUT=10mA

V_OUT=0V (note 4)

3.0

10Hz-100KHz, I_OUT=100mA, C_OUT=10µF

10Hz-100KHz, I_OUT=100mA, C_OUT=33µF

Output Noise Voltage

µV_RMS

Reference Voltage

Temperature Coefficient

ppm/˚C

Note 7

Reference Voltage and Adjustable Pin - SPX29302

1.24

1.252

1.265

1.228

1.215

•

Reference Voltage

_REF≤V_OUT≤(V_IN-1), 2.3V≤V_IN≤16V

1.277

1.203

10mA≤I_L≤I_FL, T_J<T_JMAX

Adjust Pin Bias Current

120

2/10

Rev. 2.2.0

SPX29300/01/02

3A Low Dropout Voltage Regulator

Parameter

Min.

Typ.

Max.

Units

Conditions

Adjust Pin Bias Current

Temperature Coefficient

0.1

nA/˚C

Power Good Flag Output – SPX29301

0.01

220

300

400

Output Leakage Current

µA

V_OH=16V

•

Output Low Voltage

Device set for 5V, V_IN=4.5V, I_OL=250µA

Device set for 5V, Note 8

Upper Threshold Voltage

Lower Threshold Voltage

Device set for 5V, Note 8

140

•

Hysteresis

Enable Input – SPX29301/02

Input Logic Voltage Low (OFF)

•

0.8

V_IN<10V

V_EN=16V

V_EN=0.8V

Note 9

Input Logic Voltage High (ON)

2.4

100

600

750

•

Enable Input Pin

µA

Regulator Output Current in

Shutdown

•

500

Note 2: Full load current (I_FL) is defined as 3.0A.

Note 3: Dropout voltage is defined (V_IN-V_OUT) when the output voltage drops to 99% of its nominal value.

Note 4: V_IN=V_OUT(nom)+1V. Use pulse-testing procedures to minimize temperature rise.

Note 5: Ground pin current is the regulator quiescent current. The total current drawn from the source is the sum of the load

current to the ground current.

Note 6: Output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature

range

Note 7: Thermal regulation is defined as the change in output voltage at time T after a change in power dissipation is applied,

excluding load/line regulation effects. Specifications for a 200mA load pulse as V_IN=20V (a 4W pulse) for t=10ms.

Note 8: Comparator threshold is expressed in terms of a voltage differential at the Adjust terminal below the nominal reference

voltage measured 6V input. To express these thresholds in terms of output voltage change, multiply the error amplifier gain

= V_OUT/V_REF= (R1 + R2)/R2. For example, at a programmable output voltage of 5V, the Error output is guaranteed to go low

when the output drops by 95mVx 5V/ 1.240V = 383mV. Threshold remain constant as a percent of

V_OUTas V_OUTis varied, with the dropout warning occurring at typically 5% below nominal, 7.7% guaranteed.

Note 9: V_EN≤ 0.8V and V_IN≤ 16V, V_OUT= 0.

3/10

Rev. 2.2.0

SPX29300/01/02

3A Low Dropout Voltage Regulator

BLOCK DIAGRAM

Fig. 2: SPX29300/01/02 Block Diagram

PIN ASSIGNMENT

Fig. 3: SPX29300/01/02 Pin Assignment

4/10

Rev. 2.2.0

SPX29300/01/02

3A Low Dropout Voltage Regulator

ORDERING INFORMATION

Operating

Temperature Range

Part Number

Lead-Free

Package

Packing Method

500/Tape & Reel

Bulk

SPX29300T-L-1-8/TR

SPX29300T-L-2-5/TR

SPX29300T-L-3-3

Yes

3-pin TO263

5-pin TO263

-40°C≤T_J≤+125°C

500/Tape & Reel

Bulk

SPX29300T-L-3-3/TR

SPX29300T-L-5-0/TR

SPX29301T5-L-3-3/TR

SPX29301T5-L-5-0/TR

SPX29302T5-L

500/Tape & Reel

SPX29302T5-L/TR

“YY” = Year – “WW” = Work Week – “L” = Lead Free Designator – “X” = Lot Number

Notes:

1. Refer to http://www.exar.com/SPX29300 for most up-to-date Ordering Information.

2. Visit http://www.exar.com for additional information on Environmental Rating.

5/10

Rev. 2.2.0

SPX29300/01/02

3A Low Dropout Voltage Regulator

TYPICAL PERFORMANCE CHARACTERISTICS

All data taken at V_IN= V_OUT+ 1V, T_J= T_A= 25°C, unless otherwise specified.

Fig. 5: Startup

Fig. 4: Dropout Voltage vs Load Current

Fig. 6: Line Regulation

Fig. 7: Load Regulation

_OUT=10mA, V_OUT=3.3V

V_OUT=3.3V

6/10

Rev. 2.2.0

SPX29300/01/02

3A Low Dropout Voltage Regulator

conditions.

THEORY OF OPERATION

A tantalum capacitor is recommended if a faster

load transient response is needed. If the power

source has high AC impedance, a 0.1μF ceramic

The SPX29300/01/02 incorporates protection

against over-current faults, reversed load

insertion, over temperature operation, and

positive and negative transient voltage.

capacitor between input

recommended.

ground is

THERMAL CONSIDERATIONS

MINIMUM LOAD CURRENT

Although the SPX29300/01/02 offers limiting

circuitry for overload conditions, it is still

necessary to insure that the maximum junction

temperature is not exceeded in the application.

Heat will flow through the lowest resistance

path, the junction-to-case path. In order to

insure the best thermal flow of the component,

proper mounting is required.

To ensure a proper behavior of the regulator

under light load, a minimum load of 5mA for

SPX29300/01/02 is required.

ADJUSTABLE REGULATOR DESIGN

The SPX29300/01/02 is an adjustable regulator

that can be programmed to any value between

1.25V and 16V using 2 external resistors, R1

and R2. The relationship between the resistors

and the output voltage is:

TO-263 DESIGN EXAMPLE:

Assume that V_IN= 5V, V_OUT= 3.3V,

I_OUT= 1.0A, T_A= 50°C and θ_JA= 31.4°C/W,

where:

ꢂ_ꢅꢆꢇ

ꢏ₁= ꢏ₂× �

− 1ꢐ

1.240

T_A= ambient temperature,

θ_JA= junction to ambient thermal resistance

The power calculated under these conditions

is:

ERROR FLAG

The SPX29301 features an error flag that

indicates either an over current or under

current voltage condition. The flag output goes

low, sinking 10mA when either conditions

occurs.

(

)

ꢀ_ꢁ= ꢂ_ꢃꢄ− ꢂ_ꢅꢆꢇ× ꢈ_ꢅꢆꢇ= 1.7ꢉ

And the junction temperature is calculated as

ꢊ = ꢊ + ꢀ_ꢁ× ꢍ_ꢋꢌ

ENABLE INPUT

The SPX29301/02 has an Enable function that

switches the regulator on and off. Their

thresholds are TTL compatible. When the

regulator is active, approximately 20µA flows

through the Enable pin.

ꢋ

ꢌ

ꢊ = 50 + 1.7 × 31.4 = 103.4°ꢎ

ꢋ

TYPICAL APPLICATION CIRCUITS

Figure 1 represents the typical implementation

for an adjustable output regulator. The values

of R1 and R2 set the output voltage value as

follows:

Reliable operation is insured.

CAPACITOR REQUIREMENTS

ꢏ₁

The output capacitor is needed to insure

stability and minimize the output noise. The

value of the capacitor varies with the load.

However, a minimum value of 10μF aluminum

capacitor will guarantee stability over all load

ꢂ_ꢅꢆꢇ= ꢂ_ꢑꢒꢓ× �1 +

ꢐ

ꢏ₂

A minimum value of 10kohms is recommended

for R2 with a range between 10kΩ and 47kΩ.

7/10

Rev. 2.2.0

SPX29300/01/02

3A Low Dropout Voltage Regulator

PACKAGE SPECIFICATION

3-PIN AND 5-PIN TO-263

8/10

Rev. 2.2.0

SPX29300/01/02

3A Low Dropout Voltage Regulator

PACKAGE SPECIFICATION CONTINUED

9/10

Rev. 2.2.0

SPX29300/01/02

3A Low Dropout Voltage Regulator

REVISION HISTORY

Revision

Date

Description

12/17/2009

Initial Release of Datasheet

1.0.0

Reformat of datasheet

Inserted ESD data

Modified Dropout Voltage and Ground Current values in electrical characteristics table

Corrected typographical error in result of calculus in note 8

Removed “Gound Current vs Load Current”, “Enable Threshold vs Temperature” and

“Power Supply Rejection Ratio curves”

03/31/2010

2.0.0

Updated “Dropout Voltage vs Load Current”, “Line Regulation” and “Load Regulation”

curves

Added “start Up” curve

10/19/2010

12/21/2016

Corrected Adjustable Regulator Design paragraph equation

Updated package specification and ordering information

2.1.0

2.2.0

FOR FURTHER ASSISTANCE

Technical Support:

powertechsupport@exar.com

Email:

customersupport@exar.com

Exar Technical Documentation:

http://www.exar.com/TechDoc/default.aspx?

EXAR CORPORATION

HEADQUARTERS AND SALES OFFICES

48720 Kato Road

Fremont, CA 94538 – USA

Tel.: +1 (510) 668-7000

Fax: +1 (510) 668-7030

www.exar.com

NOTICE

EXAR Corporation reserves the right to make changes to the products contained in this publication in order to improve design,

performance or reliability. EXAR Corporation assumes no responsibility for the use of any circuits described herein, conveys

no license under any patent or other right, and makes no representation that the circuits are free of patent infringement.

Charts and schedules contained here in are only for illustration purposes and may vary depending upon a user’s specific

application. While the information in this publication has been carefully checked; no responsibility, however, is assumed for

inaccuracies.

EXAR Corporation does not recommend the use of any of its products in life support applications where the failure or

malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its

safety or effectiveness. Products are not authorized for use in such applications unless EXAR Corporation receives, in writing,

assurances to its satisfaction that: (a) the risk of injury or damage has been minimized; (b) the user assumes all such risks;

Reproduction, in part or whole, without the prior written consent of EXAR Corporation is prohibited.

10/10

Rev. 2.2.0

SPX29301T5-L-5-0 [EXAR]

相关型号：

SPX29301T5-L-5-0/TR

SPX29301T5-L-5.0

SPX29301T5-L-5.0/TR

SPX29301U5-1.8-L

SPX29301U5-5.0-L

SPX29301U5-L-1-8

SPX29301U5-L-5-0

SPX29302

SPX29302A

SPX29302AT5

SPX29302AT5-L

SPX29302AT5-L/TR