LM3460M5X-1.5/NOPB【PDF 1/9 页】1-OUTPUT THREE TERM VOLTAGE REFERENCE, 1

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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 sta-

bility over the operating range. The precision output control

enables 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

current (> 7A) NPN pass transistor to provide the high

current 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

Precision output (1%)

Output voltage can be adjusted

Extremely fast transient response in GTLp and GTL bus

termination

Tiny SOT23-5 package

Output voltage capability for GTL or GTLp

Low temperature coefficient

Applications

GTL bus termination (1.2V output @ 7A)

GTLp bus termination (1.5V output @ 7A)

Adjustable high-current linear regulator

Connection Diagram and Package

Information

01260301

*This resistor is not used on the LM3460-1.2.

LM3460 Functional Diagram

5-Lead Outline Package (M5)

Actual Size

01260302

01260303

*No internal connection, but should be soldered to PC board for best heat

transfer.

Top View

See NS package Number MF05A

Ordering Information

Voltage

Order Number

Package Marking

Supplied As

1.5

LM3460M5-1.5

D06A

1000 Unit Increments on Tape and Reel

1.5

LM3460M5X-1.5

D06A

3000 Unit Increments on Tape and Reel

1.2

LM3460M5-1.2

D09A

1000 Unit Increments on Tape and Reel

1.2

LM3460M5X-1.5

D09A

3000 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 1000 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).

March 2005

LM3460-1.2,

-1.5

Precision

Controller

for

GTLp

and

GTL

Bus

ermination

2005 National Semiconductor Corporation

DS012603

www.national.com

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