EZ1583CM-2.5 [SEMTECH]

DUAL INPUT LOW DROPOUT REGULATOR; 双输入低压差稳压器


型号：	EZ1583CM-2.5
厂家：	SEMTECH CORPORATION
描述：	DUAL INPUT LOW DROPOUT REGULATOR 双输入低压差稳压器稳压器调节器输出元件输入元件
文件：	总5页 (文件大小：82K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

DUAL INPUT

LOW DROPOUT REGULATOR

EZ1580/EZ1581

EZ1582/EZ1583

TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com

February 26, 1999

DESCRIPTION

ORDERING INFORMATION

The EZ158X family of high performance positive

voltage regulators are designed for use in applications

requiring very low dropout voltage at 7, 5, 3 and 1.5

amps. When supplying 2.5V on motherboards where

both 5V and 3.3V supplies are available, the superior

dropout characteristics of the EZ158X result in reduced

heat dissipation compared to regular LDOs, thus

allowing heat sink size reduction. Additionally, the

EZ158X provides excellent regulation over variations in

line, load and temperature. Remote sense operation

allows compensating for trace, connector and other

resistive losses.

DEVICE

PACKAGE I_OUT(A)

V_OUT(V)

EZ1580CT-X.X

EZ1581CT-X.X

EZ1582CT-X.X

EZ1583CT-X.X

EZ1580CM-X.X

EZ1581CM-X.X

EZ1582CM-X.X

EZ1583CM-X.X

TO-220,

5-pin

See Note (1)

1.5

TO-263,

5-pin⁽²⁾

See Note (1)

Outstanding features include very low dropout

performance at rated current, fast transient response,

remote sense, internal current limiting, thermal

shutdown and safe operating area protection of the

output device. The EZ158X is a five terminal

adjustable voltage regulator available in the popular 5

pin TO-220 and TO-263 plastic packages.

1.5

Notes:

(1) Where -X.X denotes voltage options. Available

voltages are: 1.5V and 2.5V. Leave blank for ad-

justable version (1.3 to 5.7V).

(2) Add suffix ‘TR’ for tape and reel (TO-263).

FEATURES

ABSOLUTE MAXIMUM RATINGS

Parameter

Symbol Maximum Units

•= ^{540mV dropout @ 7A in dual supply mode}

(EZ1580)

Input Voltage

V_POWER

V_CONTROL

•= Remote sense operation

•= Fast transient response

•= 0.5% initial accuracy

V_P

V_C

13.2

Power

Dissipation

P_D

Internally

Limited

•= 5 Pin TO-220 and TO-263 packages

APPLICATIONS

Thermal Resistance

Junction to Case

EZ1580/1 TO-220

EZ1580/1 TO-263

EZ1582/3 TO-220

EZ1582/3 TO-263

•= ^{Microprocessor supplies}

°C/W

θ_JC

•= Split plane microprocessor supplies

•= Pentium® Processor P54C and P55C

•= PowerPC™ 603/604EV

•= AMD5_K86™, AMD K6

Thermal Resistance

Junction to Ambient

EZ158X TO-220

EZ158X TO-263

BLOCK DIAGRAM

°C/W

°C

θ_JA

Operating Junction

Temperature Range

T_J

0 to 125

Storage Temperature

Range

T_STG

-65 to 125

260

°C

Lead Temperature

(Soldering) 10 Sec.

T_LEAD

Pentium is a registered trademark of Intel Corporation.

PowerPC is a trademark of IBM.

AMD5_K86 and K6 are trademarks of Advanced Micro Devices.

652 MITCHELL ROAD NEWBURY PARK CA 91320

DUAL INPUT

LOW DROPOUT REGULATOR

EZ1580/EZ1581

EZ1582/EZ1583

February 26, 1999

PIN CONFIGURATION

PIN DESCRIPTION

Pin Pin Name

Pin Function

SENSE This pin is the positive side of the reference voltage for this device. With this pin it is possible to

Kelvin sense the output voltage at the load.

ADJUST / This pin is the negative side of the reference voltage for the device. Transient response can be

improved by adding a small bypass capacitor from the adjust pin to ground.

GROUND This pin is the bottom end of the internal resistor feedback chain for fixed output voltage parts,

and should be connected to ground.

OUTPUT This is the power output of the device, and is electrically connected to the TAB.

CONTROL This pin is the supply pin for the control circuitry for the device. The current flow into this pin will

be approximately 1% of the output current. For the device to regulate, the voltage at this pin must

be between 1.0V and 1.3V greater than the output voltage (see dropout specifications).

POWER This is the collector input to the power device of the EZ158X. The output load current is supplied

through this pin. For the device to regulate, the voltage on this pin must be between 0.1V and

0.7V greater than the output voltage, depending upon load current (see dropout specifications).

652 MITCHELL ROAD NEWBURY PARK CA 91320

DUAL INPUT

LOW DROPOUT REGULATOR

EZ1580/EZ1581

EZ1582/EZ1583

February 26, 1999

ELECTRICAL CHARACTERISTICS

(1)

Test Conditions

Test Limits

Typ

Parameter

Symbol

V_CNTL

Volts

V_PWR

Volts

Amps

T_J⁽⁶⁾

25°C

O.T.

Min

Max

1.257

1.263

Units

Reference Voltage

V_REF

2.75

2.00

0.01

1.243

1.237

1.250

EZ1583

EZ1582

EZ1581

EZ1580

0.01 - 1.5

0.01 - 3.0

0.01 - 5.0

0.01 - 7.0

2.7 - 12

2.05 - 5.5

Line Regulation

REG_(LINE)

2.5 - 12

1.75 - 5.5

0.01

O.T.

1.0

3.0

Load Regulation

EZ1583

0.01 - 1.5

0.01 - 3.0

0.01 - 5.0

0.01 - 7.0

EZ1582

EZ1581

EZ1580

REG_(LOAD)

2.75

2.1

3.3

O.T.

1.0

5.0

Minimum Load Current ⁽²⁾

I_O

Control Pin Current ⁽³⁾

EZ1583

1.5

3.0

5.0

7.0

6.0

EZ1582

EZ1581

EZ1580

I_C

2.75

2.05

120

Adjust Pin Current

I_ADJ

2.75

2.05

0.01

O.T.

120

µA

Current Limit

EZ1583

1.6

3.1

5.1

7.1

EZ1582

EZ1581

EZ1580

I_CL

Ripple Rejection ⁽⁴⁾

EZ1583

0.75

1.5

2.5

3.5

EZ1582

EZ1581

EZ1580

R_A

3.75

2.05

25°C

Thermal Regulation ⁽⁵⁾

REG_(THERMAL)

0.002

0.02

%/W

Dropout Voltage ⁽⁷⁾

Minimum V_CNTL

EZ1583

1.5

3.0

5.0

7.0

1.00

1.05

1.10

1.15

1.18

1.25

1.30

EZ1582

EZ1581

EZ1580

V_C-V_O

O.T.

Dropout Voltage ⁽⁷⁾

Minimum V_POWER

EZ1583

EZ1582

EZ1581

EZ1580

1.5

3.0

5.0

7.0

25°C

O.T.

0.40

0.50

0.60

V_P-V_O

2.75

25°C

O.T.

0.40

0.50

0.60

25°C

O.T.

0.40

0.50

0.60

25°C

O.T.

0.54

0.70

0.62

0.80

(1) Unless otherwise specified, V_OUT= V_SENSE, V_ADJ= 0V.

(2) Required to maintain regulation. Voltage set resistors R1, R2 are usually utilized for minimum load current.

(3) Current used to drive the output section; minimum value equals the standby current of the device.

NOTES

(4) V_C= V_P= 3.75V Avg; V_RIPPLE= 1V_PK-PK

(5) 30ms.

(6) Over Temp (O.T.) = over specified operating junction temperature range.

(7) Minimum input/output voltage required to maintain 1% regulation.

652 MITCHELL ROAD NEWBURY PARK CA 91320

DUAL INPUT

LOW DROPOUT REGULATOR

EZ1580/EZ1581

EZ1582/EZ1583

February 26, 1999

TYPICAL APPLICATIONS⁽¹⁾⁽²⁾

Adjustable Output Parts⁽³⁾

EZ158XCX

OUTPUT

VREF

SENSE

3.3V POWER IN

5V CONTROL IN

POWER

2.5V OUT

CONTROL

ADJ

124

33uF

10uF

68uF

124

GROUND

V_OUT= V

+ I_ADJ• R2

_REFç

Fixed Output Parts

EZ158XCX-2.5

SENSE

3.3V POWER IN

POWER

2.5V OUT

OUTPUT

5V CONTROL IN

CONTROL

GND

33uF

10uF

68uF

GROUND

EZ158XCX-1.5

SENSE

2.5V POWER IN

POWER

1.5V OUT

OUTPUT

3.3V CONTROL IN

CONTROL

GND

47uF

10uF

100uF

GROUND

NOTES:

(1) Capacitor values are for reference only. Good quality, low ESR tantalum or aluminum electrolytic capacitors

should be used. Increasing the value of the output capacitor will improve the overall transient response.

(2) If the same voltage is input to both POWER and CONTROL, then the dropout voltage will become 1.3V maxi-

mum.

(3) A small (~0.033µF) capacitor can be used to bypass the ADJUST pin to improve transient response, if needed.

652 MITCHELL ROAD NEWBURY PARK CA 91320

DUAL INPUT

LOW DROPOUT REGULATOR

EZ1580/EZ1581

EZ1582/EZ1583

February 26, 1999

APPLICATION INFORMATION

DEVICE OUTLINE - TO-220, 5 PIN

The EZ158X is a low dropout regulator designed to

power the next generation of low voltage, split voltage

plane processors, such as the Pentium® Processor

P55C, the IBM PowerPC™ 603EV and 604EV and the

AMD5_K86™ and K6 Processors.

The dropout voltage is minimized by utilizing a

separate input voltage, V_CONTROL, which should exceed

V_OUTby at least 1.3V. The 2.5V power for the load

(microprocessor core) can be derived from a 3.3V

system supply. Since the efficiency of a linear regulator

is the ratio of the output to the input voltage, heat

dissipation is reduced by using a 3.3 input, thereby

lowering heatsink and cooling fan costs. For a load of

7A at 2.5V, the regulator would dissipate 17.5W when

converting from 5V, but only 5.6W from a 3.3V input.

Remote Kelvin sensing of the output voltage can be

achieved by connecting the sense pin to the output at

the load. Remote sensing will reduce errors

associated with resistive trace losses between

regulator and processor.

DEVICE OUTLINE - TO-263, 5 PIN

MINIMUM LAND PATTERN - TO-263, 5 PIN

652 MITCHELL ROAD NEWBURY PARK CA 91320

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