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NCP1589L

Description
Low Voltage Synchronous Buck Controller with Light Load Efficiency and Transient Enhancement
File Size126KB,8 Pages
ManufacturerON Semiconductor
Websitehttp://www.onsemi.cn
Download Datasheet View All

NCP1589L Overview

Low Voltage Synchronous Buck Controller with Light Load Efficiency and Transient Enhancement

NCP1589L
Low Voltage Synchronous
Buck Controller with Light
Load Efficiency and
Transient Enhancement
The NCP1589L 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 and converting voltage from as low as
2.5 V. It is easy to operate and provides an optimal level of integration
to reduce size and cost of the power supply. It operates in Ramp Pulse
Modulation mode for superior load step and release response. In
addition to fast transient response, it also includes a 1.5 A gate driver
design and light load efficiency features such as adaptive non−overlap
circuitry and diode emulation. It normally operates at a range of
200−500 kHz in continuous current conduction mode, which reduces
with current at light load for further power saving. Protection features
include programmable overcurrent protection, output overvoltage and
undervoltage protection and input undervoltage lockout (UVLO).
Features
http://onsemi.com
MARKING
DIAGRAM
1589L
ALYWG
G
= Specific Device Code
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Device
DFN10
CASE 485C
1589L
A
L
Y
W
G
(Note: Microdot may be in either location)
V
CC
Range from 4.5 V to 13.2 V
Adjustable Operating frequency
Boost Pin Operates to 35 V
Ramp Pulse Modulation Control
Precision 0.8 V Internal Reference
Adjustable Output Voltage
Internal 1.5 A Gate Drivers
80% Max Duty Cycle
Input Under Voltage Lockout
Programmable Current Limit
Adaptive Diode Mode Emulation in Light Load
This is a Pb−Free Device
Graphics Cards
Desktop Computers
Servers / Networking
DSP & FPGA Power Supply
DC−DC Regulator Modules
PIN CONNECTIONS
BOOT
LX
UG
LG
GND
1
2
3
4
5
Flag
10
9
8
7
6
PGOOD
VORPM
FB
COMP/DIS
V
CC
(Top View)
Applications
ORDERING INFORMATION
Device
NCP1589LMNTWG
Package
DFN10
(Pb−Free)
Shipping
3000 /
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.
©
Semiconductor Components Industries, LLC, 2013
August, 2013
Rev. 2
1
Publication Order Number:
NCP1589L/D
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