© Semiconductor Components Industries, LLC, 2006

August, 2006 − Rev. 3

1

Publication Order Number:

NCP1522/D

NCP1522

3.0 MHz, 600 mA,

High−Efficiency, Low

Quiescent Current,

Adjustable Output Voltage

Step−Down Converter

The NCP1522 step−down PWM DC−DC converter is optimized

for portable applications powered from one cell Li−ion or three cell

Alkaline/NiCd/NiMH batteries. The device is available in an

adjustable output voltage from 0.9 V to 3.3 V. It uses synchronous

rectification to increase efficiency and reduce external part count.

The device also has a built−in 3.0 MHz (nominal) oscillator which

reduces component size by allowing a small inductor and capacitors.

Automatic switching PWM/PFM mode offers improved system

efficiency.

Finally, it includes an integrated soft−start, cycle−by−cycle current

limiting, and thermal shutdown protection. The NCP1522 is

available in a space saving, low profile TSOP5 package.

Features

Load Current

Typical Applications

GND

2

VIN

1

EN

3

LX

5

FB

4

OFF ON

VIN

CIN

COUT

R1

R2

Cff

Figure 1. Typical Application

L

VOUT

TSOP−5

ASN SUFFIX

CASE 483

PIN CONNECTIONS

Device

Package

Shipping

ORDERING INFORMATION

NCP1522ASNT1G

TSOP−5

(Pb−Free)

3000/Tape & Reel

http://onsemi.com

MARKING

DIAGRAM

A

= Assembly Location

Y

= Year

W

= Work Week

G

= Pb−Free Package

(Note: Microdot may be in either location)

(Top View)

1

5

1

5

DBRAYW

G

G

1

2

3

5

4

VIN

GND

EN

LX

FB

†For information on tape and reel specifications,

including part orientation and tape sizes, please

refer to our Tape and Reel Packaging Specification

Brochure, BRD8011/D.