LM3460-1.2, -1.5

Precision Controller for GTLp and GTL Bus Termination

General Description

The LM3460 is a monolithic integrated circuit designed for

precision control of GTLplus and GTL Bus termination. This

controller is available in a tiny SOT23-5 package, and in-

cludes an internally compensated op amp, a bandgap refer-

ence, an NPN output transistor, and voltage setting resistors.

A trimmed precision bandgap voltage reference utilizes tem-

perature drift curvature correction for excellent voltage stabil-

ity over the operating range. The precision output control en-

ables the termination voltage to maintain tight regulation,

despite fast switching requirements on the bus.

The LM3460 controller is designed to be used with a high

rent needed for the bus termination. The wide bandwidth of

the feedback loop provides excellent transient response,

and greatly reduces the output capacitance required, thus

reducing cost and board space requirements.

Features

n Precision output (1%)

n Output voltage can be adjusted

n Extremely fast transient response in GTLp and GTL bus

termination

n Tiny SOT23-5 package

n Output voltage capability for GTL or GTLp

n Low temperature coefficient

Applications

n GTL bus termination (1.2V output 7A)

n GTLp bus termination (1.5V output 7A)

n Adjustable high-current linear regulator

Connection Diagram and Package Information

Ordering Information

Voltage

Order Number

Package Marking

Supplied As

1.5

LM3460M5-1.5

D06A

250 Unit Increments on Tape and Reel

1.5

LM3460M5X-1.5

D06A

3k Unit Increments on Tape and Reel

1.2

LM3460M5-1.2

D09A

250 Unit Increments on Tape and Reel

1.2

LM3460M5X-1.5

D09A

3k Unit Increments on Tape and Reel

MARKING CODE: The first letter

″D″ identifies the part as a Driver, and the next two numbers define the voltage for the part. The fourth letter indicates the

grade, with

″A″ designating the prime grade of product.

AVAILABILITY: The SOT23-5 package is only available in quantity of 250 on tape and reel (designated by the letters

″M5″ in the part number), or in quantity

of 3000 on tape and reel (indicated by the letters

″M5X″ in the part number).

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LM3460 Functional Diagram

5-Lead Outline Package (M5)

Actual Size

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DS012603-3

transfer.

Top View

See NS package Number MA05B

May 1999

© 1999 National Semiconductor Corporation

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