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NCP1587A fiches techniques PDF

ON Semiconductor - Low Voltage Synchronous Buck Controller

Numéro de référence NCP1587A
Description Low Voltage Synchronous Buck Controller
Fabricant ON Semiconductor 
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NCP1587A fiche technique
NCP1587, NCP1587A
Low Voltage Synchronous
Buck Controller
The NCP1587 and NCP1587A are low cost PWM controllers
designed to operate from a 5 V or 12 V supply. These devices are
capable of producing an output voltage as low as 0.8 V. These 8pin
devices provide an optimal level of integration to reduce size and cost
of the power supply. The NCP1587/A provide a 1 A gate driver design
and an internally set 275 kHz (NCP1587) and 200 kHz (NCP1587A)
oscillator. In addition to the 1 A gate drive capability, other efficiency
enhancing features of the gate driver include adaptive nonoverlap
circuitry. The devices also incorporate an externally compensated
error amplifier and a capacitor programmable softstart function.
Protection features include programmable short circuit protection and
under voltage lockout (UVLO). The NCP1587/A comes in an 8pin
SOIC package.
Features
Input Voltage Range from 4.5 to 13.2 V
275 kHz (NCP1587) and 200 kHz (NCP1587A) Internal Oscillator
Boost Pin Operates to 30 V
Voltage Mode PWM Control
0.8 V ±1.0 % Internal Reference Voltage
Adjustable Output Voltage
Capacitor Programmable SoftStart
Internal 1 A Gate Drivers
80% Max Duty Cycle
Input Under Voltage Lockout
Programmable Current Limit
This is a PbFree Device
Applications
Graphics Cards
Desktop Computers
Servers / Networking
DSP & FPGA Power Supply
DCDC Regulator Modules
www.DataSheet4U.com
http://onsemi.com
MARKING DIAGRAM
8
1
8
SOIC8
1587x
D SUFFIX
CASE 751
ALYW
G
1
1587x = Specific Device Code
(x = A for NCP1587A,
blank for NCP1587)
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = PbFree Device
PIN CONNECTIONS
BST 1
TG 2
GND 3
BG 4
8 PHASE
7 COMP/DIS
6 FB
5 VCC
(Top View)
ORDERING INFORMATION
Device
Package
Shipping
NCP1587DR2G SOIC8 2500/Tape & Reel
(PbFree)
NCP1587ADR2G SOIC8 2500/Tape & Reel
(PbFree)
†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.
© Semiconductor Components Industries, LLC, 2009
February, 2009 Rev. 2
1
Publication Order Number:
NCP1587/D

PagesPages 16
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