Datasheet EZ1583CT-2.5, EZ1583CT-1.5, EZ1583CT, EZ1583CM.TR, EZ1583CM-2.5.TR Datasheet (Semtech Corporation)

DUAL INPUT LOW DROPOUT REGULATOR

EZ1580/EZ1581 EZ1582/EZ1583

February 26, 1999

1

Pentium is a registered trademark of Intel Corporation. PowerPC is a trademark of IBM. AMD5

K

86 and K6 are trademarks of Advanced Micro Devices.

DEVICE PACKAGE I

OUT

(A) V

OUT

(V)

EZ1580CT-X.X TO-220, 7 See Note (1) EZ1581CT-X.X 5-pin 5 EZ1582CT-X.X 3

EZ1583CT-X.X 1.5 EZ1580CM-X.X TO-263, 7 See Note (1) EZ1581CM-X.X 5-pin

(2)

5 EZ1582CM-X.X 3 EZ1583CM-X.X 1.5

ORDERING INFORMATION

FEATURES

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

(EZ1580)

•= Remote sense operation

•= Fast transient response

•= 0.5% initial accuracy

•= 5 Pin TO-220 and TO-263 packages

DESCRIPTION

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.

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.

APPLICATIONS

•=

Microprocessor supplies

•= Split plane microprocessor supplies

•= Pentium® Processor P54C and P55C

•= PowerPC™ 603/604EV

•= AMD5

K

86™, AMD K6

ABSOLUTE MAXIMUM RATINGS

Parameter Symbol Maximum Units

Input Voltage V

POWER

V

CONTROL

V

P

V

C

7

13.2

V

Power Dissipation

P

D

Internally

Limited

W

Thermal Resistance Junction to Case EZ1580/1 TO-220 EZ1580/1 TO-263 EZ1582/3 TO-220 EZ1582/3 TO-263

θ

JC

2 2 3 3

°C/W

Thermal Resistance Junction to Ambient EZ158X TO-220 EZ158X TO-263

θ

JA

50 60

°C/W

Operating Junction Temperature Range

T

J

0 to 125 °C

Storage Temperature Range T

STG

-65 to 125 °C

Lead Temperature (Soldering) 10 Sec.

T

LEAD

260 °C

Notes: (1) Where -X.X denotes voltage options. Available voltages are: 1.5V and 2.5V. Leave blank for adjustable version (1.3 to 5.7V). (2) Add suffix ‘TR’ for tape and reel (TO-263).

BLOCK DIAGRAM

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

DUAL INPUT LOW DROPOUT REGULATOR

EZ1580/EZ1581 EZ1582/EZ1583

February 26, 1999

2

PIN CONFIGURATION

PIN DESCRIPTION

Pin Pin Name Pin Function

1 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.

2 ADJUST /

GROUND

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.

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

and should be connected to ground. 3 OUTPUT This is the power output of the device, and is electrically connected to the TAB. 4 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). 5 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).

DUAL INPUT LOW DROPOUT REGULATOR

EZ1580/EZ1581 EZ1582/EZ1583

February 26, 1999

3

(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. (4) V

C

= VP = 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.

ELECTRICAL CHARACTERISTICS

Test Conditions

(1)

Test Limits

Parameter Symbol V

CNTL

Volts

V

PWR

Volts

Amps T

J

(6)

Min Typ Max Units

Reference Voltage V

REF

2.75 2.00 0.01 25°C 1.243 1.250 1.257

EZ1583 EZ1582 EZ1581 EZ1580

2.7 - 12 2.05 - 5.5

0.01 - 1.5

0.01 - 3.0

0.01 - 5.0

0.01 - 7.0

O.T. 1.237 1.250 1.263 V

Line Regulation REG

(LINE)

2.5 - 12 1.75 - 5.5 0.01 O.T. 1.0 3.0 mV

Load Regulation EZ1583 EZ1582 EZ1581 EZ1580

REG

(LOAD)

2.75 2.1

0.01 - 1.5

0.01 - 3.0

0.01 - 5.0

0.01 - 7.0

O.T. 1.0 5.0 mV

Minimum Load Current

(2)

I

O

53.3 O.T. 5.010mA

Control Pin Current

(3)

EZ1583 EZ1582 EZ1581 EZ1580

I

C

2.75 2.05

1.5

3.0

5.0

7.0

O.T.

6.0 30 33 60

120 mA

Adjust Pin Current I

ADJ

2.75 2.05 0.01 O.T. 50 120 µA

Current Limit EZ1583 EZ1582 EZ1581 EZ1580

I

CL

2.75 2.05 O.T.

1.6

3.1

5.1

7.1

A

Ripple Rejection

(4)

EZ1583 EZ1582 EZ1581 EZ1580

R

A

3.75 3.75

0.75

1.5

2.5

3.5

25°C 60 80 dB

Thermal Regulation

(5)

REG

(THERMAL)

0.002 0.02 %/W

Dropout Voltage

(7)

Minimum V

CNTL

EZ1583 EZ1582 EZ1581 EZ1580

V

C-VO

2.05

1.5

3.0

5.0

7.0

O.T.

1.00

1.05

1.10

1.15

1.18

1.25

1.30

V

Dropout Voltage

(7)

Minimum V

POWER

EZ1583 1.5 25°C

O.T.

0.40

0.50

0.60

EZ1582 V

P-VO

2.75 3.0 25°C O.T.

0.40

0.50

0.60

V

EZ1581 5.0 25°C

O.T.

0.40

0.50

0.60

EZ1580 7.0 25°C

O.T.

0.54

0.70

0.62

0.80

NOTES

DUAL INPUT LOW DROPOUT REGULATOR

EZ1580/EZ1581 EZ1582/EZ1583

February 26, 1999

4

TYPICAL APPLICATIONS

(1)(2)

GROUND GROUND

3.3V POWER IN

2.5V OUT

5V CONTROL IN

C2 10uF

U1 EZ158XCX-2.5

4

3

2

1

5

CONTROL

OUTPUT

GND

SENSE

POWER

C3 68uF

C1 33uF

GROUND

1.5V OUT

3.3V CONTROL IN

2.5V POWER IN

GROUND

C2 10uF

C3 100uF

C1 47uF

U1 EZ158XCX-1.5

4

3

2

1

5

CONTROL

OUTPUT

GND

SENSE

POWER

2.5V OUT

3.3V POWER IN

5V CONTROL IN

GROUND

C2 10uF

C1 33uF

C3 68uF

R1 124

R2 124

U1 EZ158XCX

4

3

2

1

5

CONTROL

OUTPUT

ADJ

SENSE

POWER

VREF

2RI

1R

2R

1VV

ADJREFOUT

•+

ö

ç è

æ

+=

Adjustable Output Parts

(3)

Fixed Output Parts

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

DUAL INPUT LOW DROPOUT REGULATOR

EZ1580/EZ1581 EZ1582/EZ1583

February 26, 1999

5

DEVICE OUTLINE - TO-220, 5 PINAPPLICATION INFORMATION

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

K

86™ and K6 Processors. The dropout voltage is minimized by utilizing a separate input voltage, V

CONTROL

, which should exceed

V

OUT

by 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