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Standard Application

Features

36V to 75V

PT3400 Series

35-W 48-V Input Isolated

DC/DC Converter

SLTS164B - JULY 2002 - REVISED OCTOBER 2002

Ordering Information

PT3401

H = 3.3V/10A (33W)

PT3402

H = 2.5V/12A (30W)

PT3403

H = 1.8V/12A (21.6W)

PT3404

H = 1.5V/16A (24W)

PT3405

H = 1.4V/16A (22.4W)

PT3406

H = 1.2V/16A (19.2W)

PT3407

H = 1V/16A

(16W)

PT3408

H = 5V/7A

(35W)

Pin-Out Information

Pin

Function

1

EN 1

2

EN 2*

5SEQ

* Negative logic

Shaded functions indicate those

Description

The PT3400 Excalibur™ power modules

are a series of 35-W rated DC/DC converters

housed in a low-profile space-saving copper

case. Fully isolated for telecom applications,

the series includes a number of standard volt-

ages, including 1.0 VDC. Other applications

include industrial, high-end computing, and

other distributed power applications that

require input-to-output isolation.

PT3400 modules incorporate a feature

that simplifies the design of multiple voltage

power supplies in DSP and ASIC applications.

Using the SEQ control pin, the output voltage

of two PT3400 modules in a power supply

system can be made to self sequence at power-

up. Other features include output voltage

adjust, over-current protection, input under-

voltage lockout, and a differential remote

sense to compensate for any voltage drop

between the converter and load.

Case/Pin

Order

Package

Configuration

Suffix

Code

Vertical

N

(EPL)

Horizontal

A

(EPM)

SMD

C

(EPN)

(Reference the applicable package code draw-

ing for the dimensions and PC board layout)

L

O

A

D

* Remote Sense (–)

Remote Sense (+)

+V

OUT

–V

OUT

V

+V

IN

–V

IN

SEQ

† C

OUT

330µF

PT3400

1

2

11–13

8–10

14

7

3

4

–V

IN

+V

IN

EN 1

EN 2

SEQ

V

6

5

+V

OUT

–V

OUT

+V

SENSE

–V

SENSE

† An output capacitor is required on models

with an output voltage less than 2.5V.

either at the load or directly to pin 8 of the

converter.