NCP1589L Datasheet, PDF (1/8 Pages) ON Semiconductor – 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
• 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
Applications
• Graphics Cards
• Desktop Computers
• Servers / Networking
• DSP & FPGA Power Supply
• DC−DC Regulator Modules
http://onsemi.com
MARKING
DIAGRAM
DFN10
CASE 485C
1589L
ALYWG
G
1589L
A
L
Y
W
G
= Specific Device Code
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Device
(Note: Microdot may be in either location)
PIN CONNECTIONS
BOOT 1
LX 2
UG 3
LG 4
GND 5
Flag
10 ^PGOOD
9 VORPM
8 FB
7 COMP/DIS
6 VCC
(Top View)
ORDERING INFORMATION
Device
Package Shipping^†
NCP1589LMNTWG DFN10
3000 /
(Pb−Free) 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
1
August, 2013 − Rev. 2
Publication Order Number:
NCP1589L/D