SPX1580U5-L [SIPEX]

Adjustable Positive LDO Regulator, 1.25V Min, 6V Max, 0.8V Dropout, PSFM5, LEAD FREE, TO-220, 5 PIN;


型号：	SPX1580U5-L
厂家：	SIPEX CORPORATION
描述：	Adjustable Positive LDO Regulator, 1.25V Min, 6V Max, 0.8V Dropout, PSFM5, LEAD FREE, TO-220, 5 PIN 局域网输出元件调节器
文件：	总8页 (文件大小：88K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

SPX1580

7A Ultra Dropout Voltage Regulator

Fast Response, Adjustable & Fixed

FEATURES

■ Low Dropout Voltage 540mV at 7A Full Load Current

SPX1580

5 Pin TO-263

■ Adjustable Ouput Down to 1.25V from ATX Power Supply

■ Fixed Output Voltages of 3.3V and 2.5V

SPX1580

5 Pin TO-220

■ Extremely Tight Load and Line Regulation

■ Standard 5-Terminal Low Cost TO-220 and TO-263

■ Replacement to Industry Standard LT1580

APPLICATIONS

■ 3.3V ATX Power Supplies

■ 3.3V to 2.9V for Portable PENTIUM^TMProcessor

■ 5V to 3.5V VRE Supply

Now Available in Lead Free Packaging

■ High efficiency "Green" Computer Systems

DESCRIPTION

The SPX1580 is a 7A Low Dropout Regulator with extremely low dropout voltage. The adjustable version

requires only two external resistors to set the output voltage. The fixed version has a preset output of 3.3V

or 2.5V and does not require any external resistors. The SPX1580 features a low dropout of 540mV(Typ.)

andoffersfasttransientresponse. ThisdeviceissuitableforPentiumapplicationsrequiring2.5Vfrom3.3V

ATXpowersupplies, wherealowcurrentinputvoltage1Vgreaterthantheoutputvoltageisavailable. With

an external sense pin the load regulation is less than 1mV. This device is an excellent choice for the use

of powering low voltage microprocessors that require a lower dropout, fast transient response to regulate

from 3.3V and 5V supplies. The SPX1580 is also an excellent choice as a post regulator for switching

supplies applications.

The SPX1580 offers protection against over-current faults, reversed input polarity, over temperature

operation and positive and negative transient voltage.

The SPX1580 is offered in a 5 pin TO-220 and TO-263 compatible with industry standard 5-terminal

regualtors. For5A, 3Aand1.5AultralowdropoutversionsrefertoSPX1581, SPX1582andSPX1583data

sheets respectively.

TYPICAL APPLICATIONS CIRCUITS

OUT

2.5V

OUT

3.3V

OUT

2.5V

3.3V

OUT

SPX1580

33µF

SPX1580

33µF

CTRL

SENSE

CTRL

SENSE

124Ω

ADJ

GND

68µF

10µF

124Ω

(1) V

(2) V

(3) V

needed when V < 5V.

CTRL

OUT

REF

(1) V

needed when V < 5V.

CTRL

= V

REF

(1+R /R )+I

R .

ADJ 2

is measured across adjust to sense.

Date: 5/16/04

SPX1580 7A Ultra Dropout Voltage Regulator

ABSOLUTE MAXIMUM RATINGS

Power Dissipation ..................................... Internally Limited

Lead Temp. (Soldering, 10 Seconds) ......................... 300°C

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

Operating Junction Temperature Range

Input Supply Voltage ..................................................... 7V

V_CTRLInput Voltage .................................................... 13.2V

SPX1580 Control Section ............................. 0°C to +125°C

SPX1580 Power Transistor .......................... 0°C to +150°C

ELECTRICAL CHARACTERISTICS

Electrical characteristics at V_OUT= V_SENSE, V_ADJ= 0V, T_A= 25ºC, C_CTL= C_PWR= C_OUT= 33µF tantalum cap unless otherwise specified.

The ♦ denotes the specifications which apply over the -40°C to 85°C temperature range, unless otherwise specified.

PARAMETER

2.5V Version

CONDITIONS

MIN.

TYP.

MAX.

UNITS

Output Voltage

2.45

2.40

2.5

2.55

2.60

V_CTRL= 4.5V to 12V, V_IN= V_OUT

+0.8V, I_O= 10mA to 7A

♦

3.3V Version

♦

Output Voltage

3.234

3.168

3.3

3.366

3.432

V_CTRL= 4.5V to 12V, V_IN= V_OUT

+0.8V, I_O= 10mA to 7A

All Voltage Options

Reference Voltage (Note 3)

V_CTRL= 4.5V, V_IN= 2.05V, I_O=

10mA

1.237

1.231

1.25

1.263

1.269

V_CTRL= 4.5V, V_IN= 2.05V, I_O=

10mA to 7A

♦

Line Regulation

1.0

V_CTRL= 4.5V to 12V, V_IN= V_OUT

0.8V to 5.5V, I_O= 10mA

♦

3.0

Load Regulation (Note 1)

1.1

V_CTRL= 4.5V to 12V, V_IN= V_OUT

0.8V, I_O= 10mA

5.0

Dropout Voltage Minimum

VIN (Note 2) (VIN - VOUT)

V_CTRL= 4.75V, I_O= 7A

0.54

0.80

Current Limit

V_CTRL= 4.5V, V_IN= 2.05V,

V_OUT= 100mV

7.1

Minimum Load Current

V_CTRL= 5V, V_IN=V_OUT+ 0.8V

♦

Thermal Regulation

Ripple Rejection

0.002

0.02

%/W

30mS Pulse

V_CTRL= 5V, V_IN= 5V, I_O= 7A

Control Pin Current

V_CTRL= 4.5V, V_IN=V_OUT+ 0.8V, I_O

= 7A

µA

♦

130

Adjustable Pin Current

V_CTRL= 4.5V, V_IN= 2.05V, I_O=

10mA

120

Thermal Resistance

TO-220 & TO-263

Junction to Case (Ø )

ºC/W

Junction to Ambient (Ø )

Date: 5/16/04

SPX1580 7A Ultra Dropout Voltage Regulator

PIN DESCRIPTION

Pin Number

Pin Name

DESCRIPTION

Allows Kelvin sense of V_OUTat load. (Positive side of the reference

voltage of the device)

SENSE

Negative side of the reference voltage for the device. Adding a

small bypass capacitor from ADJ pin to ground will improve the

transient response.

ADJ

V_OUT

Power output of the device.

Supply pin for the control circuitry of the device. The current flow

into this pin will be about 1% of the output current. V_CTRLmust be

between 0.1V and 1.3V greater than the ouput voltage for the

device to regulate.

V_CTRL

Output load current is supplied through this pin. V_INmust be

between 0.1V and 0.8V greater than the output voltage for this

device to regulate.

V_IN

Note that TAB is internally connected to Pin 3.

BLOCK DIAGRAM

(4) V_CTRL

V_IN(5)

S.O.A

LIMIT

CURRENT

LIMIT

AMPLIFIER

_OUT(3)

SENSE

THERMAL OVERLOAD

SENSE (1)

ADJ (2)

VOLTAGE

REGULATION

AMPLIFIER

V_REF

APPLICATION INFORMATION

The SPX1580 is designed as a high performance

and low cost solution for application requiring a

lower dropout than traditional NPN regulators.

A typical application would use 3.3V for V_IN

and 5.0V for V_CTRLfrom a motherboard power

supply to provide a nominal 2.5V output. Using

the sense pin allows Kelvin measure the output,

reducing resistance-associated errors.

TheSPX1580usesaseparateinputvoltageV_CTRL

( V_CTRL≥ V_OUT+ 1.3V) to minimize the dropout

voltage. This allows the 2.5V power for the load

to come from a 3.3V system supply.

As added benefit this will reduce the heat dissi-

pation*, andlowerheatsinkandcoolingfancost.

The SPX1580 can power the 2.5V core voltage

for microprocessors such as a PentiumPC

P55C , AMD5k86 and K6 and the IBM

PowerPC 603EV and 604EV processors.

Date: 5/16/04

SPX1580 7A Ultra Dropout Voltage Regulator

APPLICATION INFORMATION

Lowering Noise

Using the SENSE pin to Kelvin the load will

increase accuracy of the output voltage during

load regulation. For the fixed voltage device,

adding a bypass capacitor from ADJ pin to

ground improves transient response. A 330pF

ceramic capacitor is recommended.

Output Capacitor

An output capacitor for SPX1580 is for circuit

compensation for the device to prevent

oscilliation. The minimum size of the output

capacitor is either a 330µF aluminum electro-

lytic capacitor or 33uF tantalum. Larger capaci-

tor values improve the regulator transient re-

sponse performance and increase surge load

capability. The output capacitor should have an

ESR not more than 0.3Ω.

Adjustable Regulator Design

1.25V reference voltage is being developed be-

tween the SENSE pin and the ADJ pin of the

SPX1580.Addingtwoexternalresistors(seefig

1.) will allow setting the output voltage from

1.25V to 6V. R₁is chosen so that this current is

specified minimum load current of 10mA. R₂is

given by the formula: V_OUT= V_REF(1+ R₂/R₁)

+ I_ADJ(R₂). The current flowing from the ADJ

pin is typicaly 50uA. This ADJ pin contributes

to the final V_OUTbut is usually neglected.

Connecting the sense pin to the top of the resis-

tor divider will improve load regualtion.

OUT

2.5V

OUT

3.3V

SPX1580

33µF

CTRL

SENSE

124Ω

ADJ

68µF

10µF

0.033µF

124Ω

(1) V

(2) V

(3) V

needed when V < 5V.

CTRL

OUT

REF

= V

(1+R /R )+I

R .

ADJ 2

REF

is measured across adjust to sense.

Figure 1. Adjustable Regulator.

Date: 5/16/04

SPX1580 7A Ultra Dropout Voltage Regulator

OUT

2.5V

OUT

3.3V

SPX1580

CTRL

SENSE

33µF

GND

68µF

10µF

(1) V

needed when V < 5V.

CTRL

Figure 2. Typical Fixed Regulator.

Date: 5/16/04

SPX1580 7A Ultra Dropout Voltage Regulator

PACKAGE: 5 PIN TO-220

E/2

SEATING

PLANE

øP

CHAMFER

OPTIONAL

Dimensions in

(inches)

5 PIN TO-220

MIN NOM MAX

.160

.190

.040

.022

.590

.415

.015

.014

.560

.385

.062

.415

.072

.045

.234

.090

.540

.055

.258

.115

.560

.250

∆P

.146

.156

.103

.113

5 PIN TO-220

.30

.24

Date: 5/16/04

SPX1580 7A Ultra Dropout Voltage Regulator

PACKAGE: 5 PIN TO-263

SEATING PLANE

(DATUM A)

(E)

5X b

5 PIN TO-263

JEDEC TO-263

(BB) Variation

Dimensions in (mm)

MIN NOM MAX

.160

.190

.010

.039

.029

.023

.020

.015

.045

.270

0º-8º

.380

.245

.420

(b)

.067 BSC

.625

WITH PLATING

.575

.070

.110

.066

.070

.010 BSC

BASE METAL

CONTACT AREA

5 PIN TO-263

Date: 5/16/04

SPX1580 7A Ultra Dropout Voltage Regulator

ORDERING INFORMATION

Operating Temperature Range Package Type

Part Number

SPX1580U5 ................................................ -40°C to +85°C ........................................................ 5 Pin TO-220

SPX1580U5-2.5.......................................... -40°C to +85°C ....................................................... 5 Pin TO-220

SPX1580U5-3.3.......................................... -40°C to +85°C ....................................................... 5 Pin TO-220

SPX1580T5 ................................................ -40°C to +85°C ........................................................ 5 Pin TO-263

SPX1580T5/TR .......................................... -40°C to +85°C ........................................................ 5 Pin TO-263

SPX1580T5-2.5 .......................................... -40°C to +85°C ....................................................... 5 Pin TO-263

SPX1580T5-2.5/TR .................................... -40°C to +85°C ....................................................... 5 Pin TO-263

SPX1580T5-3.3 .......................................... -40°C to +85°C ....................................................... 5 Pin TO-263

SPX1580T5-3.3/TR .................................... -40°C to +85°C ....................................................... 5 Pin TO-263

Available in lead free packaging. To order add "-L" suffix to part number.

Example: SPX1580T5-3.3/TR = standard; SPX1580T5-L-3.3/TR = lead free

/TR = Tape and Reel

Pack quantity is 500 for TO-263.

Corporation

ANALOG EXCELLENCE

Sipex Corporation

Headquarters and

Sales Office

233 South Hillview Drive

Milpitas, CA 95035

TEL: (408) 934-7500

FAX: (408) 935-7600

Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the

application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others.

Date: 5/16/04

SPX1580 7A Ultra Dropout Voltage Regulator

SPX1580U5-L [SIPEX]

相关型号：

SPX1580U5-L-2.5

SPX1580U5-L-3.3

SPX1581

SPX1581T

SPX1581T-2.5

SPX1581T-2.8

SPX1581T-3.3

SPX1581T5

SPX1581T5-2-5

SPX1581T5-2-5/TR

SPX1581T5-2-8

SPX1581T5-2-8/TR