© Semiconductor Components Industries, LLC, 2009

May, 2009 − Rev. P4

1

Publication Order Number:

NCP1589A/D

NCP1589A, NCP1589B

Product Preview

Low Voltage Synchronous

Buck Controller

The NCP1589A/B is a low cost PWM controller designed to operate

from a 5 V or 12 V supply. This device is capable of producing an

output voltage as low as 0.8 V. This device is capable of converting

voltage from as low as 2.5 V. This 10−pin device provides an optimal

level of integration to reduce size and cost of the power supply.

Features include a 1.5 A gate driver design and an internally set

300 kHz or 600 kHz oscillator. In addition to the 1.5 A gate drive

capability, other efficiency enhancing features of the gate driver

include adaptive non−overlap circuitry. The NCP1589A/B also

incorporates an externally compensated error amplifier. Protection

features include programmable short circuit protection and

undervoltage lockout (UVLO).

Features

Applications

This document contains information on a product under development. ON Semiconductor

reserves the right to change or discontinue this product without notice.

DFN10

CASE 485C

MARKING DIAGRAMS

PIN CONNECTIONS

1589x

= Specific Device Code

x = A or B

A

= Assembly Location

L

= Wafer Lot

Y

= Year

W

= Work Week

G

= Pb−Free Device

1

BOOT

10

PGOOD

2

LX

3

UG

4

LG

9

VOS

8

FB

7

COMP/EN

(Top View)

Device

Package

ORDERING INFORMATION

†For information on tape and reel specifications,

including part orientation and tape sizes, please

refer to our Tape and Reel Packaging Specifications

Brochure, BRD8011/D.

http://onsemi.com

5

GND

6

(Note: Microdot may be in either location)

NCP1589AMNTWG

DFN10

(Pb−Free)

3000 /

Tape & Reel

NCP1589BMNTWG

1589x

ALYWG

G

NCP1589AMNTXG

NCP1589BMNTXG