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NCP1580 Datasheet(PDF) 1 Page - ON Semiconductor

Part No. NCP1580
Description  Low Voltage Synchronous Buck Controller
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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NCP1580 Datasheet(HTML) 1 Page - ON Semiconductor

 
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© Semiconductor Components Industries, LLC, 2005
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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