NCP81044 Datasheet, PDF (1/16 Pages) ON Semiconductor – Low Voltage Synchronous Buck Controller

NCP81044
Product Preview
Low Voltage Synchronous
Buck Controller
The NCP81044 is a PWM controller 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
NCP81044 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 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 NCP81044 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
• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
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
81044
ALYW
G
1
81044 = 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^†
NCP81044DR2G 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.
This document contains information on a product under development. ON Semiconductor
reserves the right to change or discontinue this product without notice.
© Semiconductor Components Industries, LLC, 2012
1
June, 2012 − Rev. P0
Publication Order Number:
NCP81044/D