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Standard Application

Features

(See Ordering Information)

Description

The PT6980 Excalibur™ series of

power modules are dual output integrated

switching regulators (ISRs) specifically

designed to power mixed signal ICs.

Operating from a 12-V input bus, the dual

output provides power for both the digital

I/O logic and a DSP core from a single

module. Both output voltages are internally

sequenced during power-up and power-

down to comply with the requirements of

the latest DSP chips. Each output is inde-

pendently adjustable or can be set to at

least one alternative bus voltage with a

simple pin-strap. The modules are made

available in a space-saving solderable case.

The features include output current limit

and short-circuit protection.

C1 = Req’d 560µF electrolytic

C2 = Req’d 330µF electrolytic

C3 = Optional 100µF electrolytic

PT6980

C

2

+

GND

V

IN

GND

4,5,6

7-11

12-15

18-21

16

C

1

22

C

3

+

23

1

Vo

Vo

3

STBY

Vo

1

Vo

2

PT6980 Series

10-A 12V-Input Dual Output

Integrated Switching Regulator

SLTS154

Revised (10/2/2001)

Ordering Information

PT6981

o = +2.5/1.8 Volts

PT6982

o = +3.3/2.5 Volts

PT6983

o = +3.3/1.8 Volts

PT6984

o = +3.3/1.2 Volts

PT6985

o = +2.5/1.2 Volts

Pin Function

2

No Connect

3

STBY

7GND

8GND

9GND

10

GND

11

GND

12

Pin

Function

13

14

15

16

17

No Connect

18

19

20

21

22

23

See application note on output voltage adjustment.

Pin-Out Information

Case/Pin

Order

Package

Configuration

Suffix

Code

Vertical

N

(ELF)

Horizontal

A

(ELG)

SMD

C

(ELH)

(Reference the applicable package code drawing

for the dimensions and PC layout)