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دیتاشیت - ON Semiconductor - Low Voltage Synchronous Buck Controller

شماره قطعه NCP1580
شرح مفصل Low Voltage Synchronous Buck Controller
تولید کننده ON Semiconductor 
آرم ON Semiconductor 


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NCP1580 شرح
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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
VIN
http://onsemi.com
8
1
SOIC−8
D SUFFIX
CASE 751
MARKING
DIAGRAM
8
1580
ALYW
1
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
PIN CONNECTIONS
BST 1
TG 2
GND 3
BG 4
8 PHASE
7 COMP
6 FB
5 VCC
(Top View)
ORDERING INFORMATION
Device
Package
Shipping
NCP1580DR2
SOIC−8 2500/Tape & Reel
NCP1580DR2G SOIC−8 2500/Tape & Reel
(Pb−Free)
†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.
VOUT
VCC
BST
TG FB
SWN
COMP
BG GND
Figure 1. Typical Application Diagram
© Semiconductor Components Industries, LLC, 2005
January, 2005 − Rev. 4
1
Publication Order Number:
NCP1580/D

قانون اساسیصفحه 12
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