NCP1587E Datasheet, PDF (1/16 Pages) ON Semiconductor – Low Voltage Synchronous Buck Controller

NCP1587E
Low Voltage Synchronous
Buck Controller
The NCP1587E 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 8−pin device provides an optimal
level of integration to reduce size and cost of the power supply. The
NCP1587E provides a 1 A gate driver design and an internally set
275 kHz oscillator. In addition to the 1 A gate drive capability, other
efficiency enhancing features of the gate driver include adaptive
non−overlap circuitry. The device also incorporates an externally
compensated error amplifier and a capacitor programmable soft−start
function. Protection features include programmable short circuit
protection and under voltage lockout (UVLO). The NCP1587E comes
in an 8−pin SOIC package.
Features
• Input Voltage Range from 4.5 to 13.2 V
• 275 kHz 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 Soft−Start
• Internal 1 A Gate Drivers
• 80% Max Duty Cycle
• Input Under Voltage Lockout
• Programmable Current Limit
• This is a Pb−Free Device
Applications
• Graphics Cards
• Desktop Computers
• Servers / Networking
• DSP & FPGA Power Supply
• DC−DC Regulator Modules
http://onsemi.com
MARKING DIAGRAM
8
1
8
SOIC−8
D SUFFIX
CASE 751
1587E
ALYW
G
1
1587E= Specific Device Code
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = Pb−Free Device
PIN CONNECTIONS
BST 1
TG 2
GND 3
BG 4
8 PHASE
7 COMP/DIS
6 FB
5 V_CC
(Top View)
ORDERING INFORMATION
Device
Package
Shipping^†
NCP1587EDR2G 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.
© Semiconductor Components Industries, LLC, 2009
1
June, 2009 − Rev. 0
Publication Order Number:
NCP1587E/D