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NCP1587 Datasheet, PDF (1/16 Pages) ON Semiconductor – Low Voltage Synchronous Buck Controller | |||
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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 8âpin
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 nonâoverlap
circuitry. The devices also incorporate an externally compensated
error amplifier and a capacitor programmable softâstart function.
Protection features include programmable short circuit protection and
under voltage lockout (UVLO). The NCP1587/A comes in an 8âpin
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 SoftâStart
⢠Internal 1 A Gate Drivers
⢠80% Max Duty Cycle
⢠Input Under Voltage Lockout
⢠Programmable Current Limit
⢠This is a PbâFree Device
Applications
⢠Graphics Cards
⢠Desktop Computers
⢠Servers / Networking
⢠DSP & FPGA Power Supply
⢠DCâDC Regulator Modules
http://onsemi.com
MARKING DIAGRAM
8
1
8
SOICâ8
D SUFFIX
CASE 751
1587x
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 = PbâFree 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
Shippingâ
NCP1587DR2G SOICâ8 2500/Tape & Reel
(PbâFree)
NCP1587ADR2G SOICâ8 2500/Tape & Reel
(PbâFree)
â 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
February, 2009 â Rev. 2
Publication Order Number:
NCP1587/D
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