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PT5520 Series

1.5-A 5-V/3.3-V Input Adjustable

Integrated Switching Regulator

SLTS147A

(Revised 10/5/2001)

Standard Application

C

1

C

2

+V

O

COM

COM

+V

IN

+

PT5520

2

3

5

4

1

INH

V

C1 = Optional 1µF ceramic

C2 = Required 100µF (See Notes)

Ordering Information

PT5521

¨ =3.3 Volts

PT5522

¨ =2.5 Volts

PT5523

¨ =2.0 Volts

PT5524

¨ =1.8 Volts

PT5525

¨ =1.5 Volts

PT5526

¨ =1.2 Volts

PT5527

¨ =1.0 Volts

Pin

Function

1

Inhibit *

2Vin

3

GND

Pin-Out Information

* For Inhibit pin:

Open = output enabled

Ground = output disabled

Case/Pin

Order

Package

Configuration

Suffix

Code

Vertical

N

(EFK)

Horizontal

A

(EFL)

SMD

C

(EFM)

(Reference the applicable package code draw-

ing for the dimensions and PC board layout)

Description

The PT5520 Excalibur™ power modules

are a series of high-performance Integrated

Switching Regulators (ISRs). Rated 1.5A,

these modules operate from input voltages as

low as 3.1V to provide a local step-down

power source. They are an ideal compliment

to the industry’s latest high-performance DSPs

and microprocessors. The series includes

output voltage options as low as 1.0VDC.

The PT5520 series is packaged in a 5-pin

thermally efficient copper case. The case is

solderable, has a small footprint, and can

accommodate both through-hole and surface

mount pin configurations.

The product features external output

voltage adjustment, an inhibit function, and

short circuit protection. A 100µF capacitor

is required for proper operation.

Features