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Standard Application

Features

(See Ordering Information)

Description

The PT6935 Excalibur™ series of

power modules are dual output integrated

switching regulators (ISRs) designed to

power the latest mixed signal ICs. 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 independently 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 solder-

able case. Features include an output

current limit and short-circuit protec-

tion.

C1 = Req’d 330µF * electrolytic

C2 = Req’d 330µF * electrolytic

C3 = Optional 100µF electrolytic

* 300µF for Oscon® or low

ESR tantalum -see notes

PT6935

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

PT6935 Series

11-A 5V/3.3V-Input Dual Output

Integrated Switching Regulator

SLTS091B

Revised (9/30/2001)

Ordering Information

PT6935

o = +2.5/1.8 Volts

PT6936

o = +3.3/2.5 Volts

PT6937

o = +3.3/1.8 Volts

PT6938

o = +3.3/1.2 Volts

PT6939

o = +2.5/1.2 Volts

Pin Function

2No Connect

3

STBY

7GND

8GND

9GND

10

GND

11

GND

Pin

Function

13

14

15

16

17

No Connect

18

19

22

voltage. 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)