NCP1580DR2G datasheet(1/12 Pages) ONSEMI

Part #	NCP1580DR2G

Description	Low Voltage Synchronous Buck Controller

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Manufacturer	ONSEMI [ON Semiconductor]

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January, 2005 − Rev. 4

1

Publication Order Number:

NCP1580/D

NCP1580

Low Voltage Synchronous

Buck Controller

The NCP1580 is a voltage mode PWM controller designed to

operate from a 5.0 V or 12 V supply and produce an output voltage as

low as 0.8 V. This 8−pin device provides an optimal level of

integration to reduce size and cost of the power supply. The NCP1580

has a fixed 350 kHz oscillator and soft−start function. The NCP1580

provides a 1.5 A floating gate driver design to drive N−Channel

MOSFETs in a synchronous configuration. Adaptive non−overlap

circuitry reduces switching losses by preventing simultaneous

conduction of both outputs. Protection features include thermal

shutdown and undervoltage lockout (UVLO). The NCP1580 is

available in an 8−pin SOIC package.

Features

• Input Voltage Range from 4.5 V to 13.2 V

• 350 kHz Internal Oscillator

• Boost Pin Operates to 26.5 V

• Voltage Mode PWM Control

• 0.8 V $1.5% Internal Reference Voltage

• Adjustable Output Voltage

• Internal Soft−Start

• Internal 1.5 A Gate Drivers

• Adaptive Non−Overlap Circuit

• 90% Max Duty Cycle

• Input UVLO

• Overtemperature Protection

• Fully Specified over −40°C to 85°C

• Pb−Free Package is Available

Applications

• Graphics Cards

• Desktop Computers

• Servers/Networking

• DSP and FPGA Power Supply

• DC−DC Regulator Modules

BST

TG

GND

BG

COMP

FB

VCC

SWN

VIN

VOUT

Figure 1. Typical Application Diagram

SOIC−8

D SUFFIX

CASE 751

1

8

MARKING

DIAGRAM

PIN CONNECTIONS

A

= Assembly Location

L

= Wafer Lot

Y

= Year

W

= Work Week

1

BST

8 PHASE

2

TG

3

GND

4

BG

7 COMP

6 FB

5 VCC

(Top View)

1580

ALYW

Device

Package

Shipping†

ORDERING INFORMATION

NCP1580DR2

SOIC−8

2500/Tape & Reel

†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.

NCP1580DR2G

SOIC−8

(Pb−Free)

2500/Tape & Reel

1

8

http://onsemi.com

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