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Numéro de référence | NCP1587A | ||
Description | Low Voltage Synchronous Buck Controller | ||
Fabricant | ON Semiconductor | ||
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1 Page
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 8−pin
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 non−overlap
circuitry. The devices also incorporate 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 NCP1587/A comes in an 8−pin
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 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
www.DataSheet4U.com
http://onsemi.com
MARKING DIAGRAM
8
1
8
SOIC−8
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 = Pb−Free 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 SOIC−8 2500/Tape & Reel
(Pb−Free)
NCP1587ADR2G 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
February, 2009 − Rev. 2
1
Publication Order Number:
NCP1587/D
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Pages | Pages 16 | ||
Télécharger | [ NCP1587A ] |
No | Description détaillée | Fabricant |
NCP1587 | Low Voltage Synchronous Buck Controller | ON Semiconductor |
NCP1587A | Low Voltage Synchronous Buck Controller | ON Semiconductor |
NCP1587E | Low Voltage Synchronous Buck Controller | ON Semiconductor |
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