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Features

(Independantly Regulated)

36V to 75V

(All Outputs)

Ordering Information

PT4841

o = +15/+3.3/+1.5V (65W)

PT4842

o = +12/+3.3/+1.8V (62W)

Case/Pin

Order

Package

Configuration

Suffix

Code

Vertical

N

(EKD)

Horizontal

A

(EKA)

SMD

C

(EKC)

(Reference the applicable package code drawing for

the dimensions and PC layout)

Typical Application

PT4840 Series—48V

Description

The PT4840 Excalibur™ power

modules are a series of isolated triple-

output DC/DC converters that

operate from a standard (–48V) central

office supply. Rated for up to 65W,

these regulators are appropriate for

powering both analog and mixed-

signal circuitry. A typical application

is a chip-set for an ADSL/DSL line

card.

The output voltage combinations

offered by the PT4840 series provide

power for a low-voltage processor

core, the associated digital circuitry,

and analog support circuitry.

The PT4840 series incorporates

many features to simplify system

integration. These include a flexible

On/Off control, over-temperature

protection, and an input under-

voltage lock-out. All outputs are

current limited and short-circuit

protected. In addition, the low-

voltage outputs for processor core

and digital circuitry meet the power-

up and power-down sequencing

requirements of popular DSP ICs.

The PT4840 series is housed in

a space-saving solderable case. The

module requires no external heat sink

PCB area.

Cin

= Optional

Cout = Optional; See specifications

EN1 & EN2 pins: See On/Off Enable Logic

65-W Triple Output Isolated DC/DC

Converter for DSL Applications

SLTS142C - DECEMBER 2000 -REVISED SEPTEMBER 2002

DSL/ADSL

IC Chip Set

+V

IN

–V

IN

+15VDC

+3.3VDC

+1.5VDC

PT4841

1

2

11

15,16

22,23

18–20

12,13

3

Vo

1

COM

COM

Vo

2

Vo

3

+V

IN

–V

IN

EN 1

Vo

Vo

17

21

Vo

Vo

C

OUT1

C

OUT3

C

OUT2

C

IN

4

EN 2

1.9 sq. in. PCB Area (suffix N)

UL60950

CSA 22.2 950

VDE EN60950