LT1585CM33 Linear Technology Corporation, LT1585CM33 Datasheet

LT1585CM33

Manufacturer Part Number

LT1585CM33

Description

TO-263

Manufacturer

Linear Technology Corporation

Datasheet

1.LT1585ACT33PBF.pdf (16 pages)

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FEATURES

APPLICATIO S

LT1585/7CM, LT1584/5/7CT

LT1585/7CM-3.3, LT1584/5/7CT-3.3

LT1585CM-3.38, LT1584/5CT-3.38

LT1585/7CM-3.45, LT1584/5/7CT-3.45

LT1585/7CM-3.6, LT1584/5/7CT-3.6

TYPICAL APPLICATIO

* REQUIRED FOR STABILITY

Fast Transient Response

Guaranteed Dropout Voltage at Multiple Currents

Load Regulation: 0.05% Typical

Trimmed Current Limit

On-Chip Thermal Limiting

Standard 3-Pin Power Package

Pentium

PowerPC

Other 2.5V to 3.6V Microprocessor Supplies

Low Voltage Logic Supplies

Battery-Powered Circuitry

Post Regulator for Switching Supply

NOTE: MICROPROCESSOR APPLICATIONS WITH LOAD TRANSIENTS OF 3.8A REQUIRE

OUTPUT DECOUPLING CAPACITANCE > 1300 F ON FIXED VOLTAGE PARTS TO ACHIEVE

< 50mV OF DEVIATION FROM NOMINAL OUTPUT. CONSULT FACTORY FOR DETAILS

LT1584: C2 = 22 F,

LT1585/LT1587: C2 = 10 F

4.75V

Processor Supplies

Supplies

3.3V, 7A, 4.6A, 3A Regulator

10 F

LT1584-3.3

LT1585-3.3

LT1587-3.3

Adjustable

3.3V Fixed

3.38V Fixed

3.45V Fixed

3.6V Fixed

C2*

SOLID

TANTALUM

3.3V

7A, 4.6A, 3A

1585 TA01

DESCRIPTIO

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

The LT

terminal regulators with 7A, 4.6A and 3A output current

capability, respectively. Design has been optimized for low

voltage applications where transient response and mini-

mum input voltage are critical. Similar to the LT1083/4/5

family, it has lower dropout voltage and faster transient

response. These improvements make it ideal for low volt-

age microprocessor applications requiring a regulated

2.5V to 3.6V output with an input supply below 7V.

Current limit is trimmed to ensure specified output current

and controlled short-circuit current. On-chip thermal lim-

iting provides protection against any combination of over-

load that would create excessive junction temperatures.

The LT1585/LT1587 are available in both the through-hole

and surface mount versions of the industry standard 3-pin

TO-220 power package. The LT1584 is available in the

through-hole 3-pin TO-220 power package.

7A, 4.6A, 3A Low Dropout

, LTC and LT are registered trademarks of Linear Technology Corporation.

1584/LT1585/LT1587 are low dropout three-

1.5

1.4

1.3

1.2

1.1

1.0

0.9

0.8

0.7

0.6

0.5

Adjustable and Fixed

Dropout Voltage vs Output Current

Positive Regulators

LT1584/LT1585/LT1587

OUTPUT CURRENT (A)

Fast Response

1585 TA02

FULL LOAD

158457a

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