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Standard Application

Features

• Up to 22-A Output Current

• 3.3-V Input Voltage

• Wide-Output Voltage Adjust

(0.8 V to 2.5 V)

• Efficiencies up to 93 %

• 120 W/in³ Power Density

• On/Off Inhibit

• Output Voltage Sense

• Pre-Bias Startup

• Margin Up/Down Controls

• Under-Voltage Lockout

PTH03020W —3.3-V Input

22-A, 3.3-V Input Non-Isolated

Wide-Output Adjust Power Module

Rset = Required to set the output voltage to a value

higher than 0.8 V. (See spec. table for values)

Cin = Required electrolytic 1,000 µF

Cout = Recommended 330 µF electrolytic

• Auto-Track™ Sequencing

• Output Over-Current Protection

(Non-Latching, Auto-Reset)

• Over-Temperature Protection

• Operating Temp: –40 to +85 °C

• IPC Lead Free 2

• Safety Agency Approvals:

UL 1950, CSA 22.2 950, EN60950

VDE (Pending)

• Point-of-load Alliance (POLA)

Compatible

SLTS206C – MAY 2003 – REVISED DECEMBER 2003

Margin Up

Margin Down

V

IN

L

O

A

D

C

IN

1,000 µF

(Required)

C

OUT

330 µF

(Optional)

Inhibit

GND

GND

V

OUT

V

o Sense

Track

R

SET (Required)

0.1 W, 1 %

PTH03020W

(Top View)

1

2

10

9

8

7

6

5

4

3

Description

The PTH03020 series of non-isolated

power modules offers OEM designers a

combination of high performance, small

footprint, and industry leading features.

As part of a new class of power modules

these products provide designers with the

flexibility to power the most complex

multi-processor digital systems using

off-the-shelf catalog parts.

The series employs double-sided surface

mount construction and provides high-

performance step-down power conversion

for up to 22 A of output current from a

3.3-V input bus voltage. The output volt-

age of the PTH03020W can be set to

any value over the range, 0.8 V to 2.5 V,

using a single resistor.

This series includes Auto-Track™.

Auto-Track simplifies the task of supply

voltage sequencing in a power system by

enabling modules to track each other, or

any external voltage, during power up and

power down.

Other operating features include an

on/off inhibit, output voltage adjust (trim),

and margin up/down controls. To ensure

tight load regulation, an output voltage

sense is also provided. A non-latching

over-current trip and over-tempterature

shutdown provide load fault protection.

Target applications include complex

multi-voltage, multi-processor systems

that incorporate the industry’s high-speed

DSPs, micro-processors and bus drivers.

Auto-Track™

Sequencing

Pin Configuration

Pin

Function

1

GND

2Vin

3

Inhibit *

4Vo Adjust

5Vo Sense

6Vout

7

GND

8

Track

9

Margin Down *

10

Margin Up *

* Denotes negative logic:

Open

= Normal operation

Ground = Function active

NOMINAL SIZE =

1.5 in x 0.87 in

(38,1 mm x 22,1 mm)