NCP81045 Datasheet, PDF (1/17 Pages) ON Semiconductor – Single Synchronous Step-Down Controller

NCP81045
Product Preview
Single Synchronous
Step-Down Controller
The NCP81045 is a synchronous stepdown controller for high
performance systems battery−power systems. The NCP81045
includes a high efficiency PWM controller. A pin is provided to allow
two devices in interleaved operation. An internal power good voltage
monitor tracks the SMPS output. NCP81045 also features soft−start
sequence, UVLO for V_CC and switcher, overvoltage protection,
overcurrent protection, undervoltage protection and thermal
shutdown. The IC is packaged in QFN16.
Features
• 0.8% accuracy 0.8 V Reference
• 4.5 V to 27 V Battery/Adaptor Voltage Range
• Adjustable Output Voltage Range: 0.8 V to 3.3 V
• Synchronization Interleaving between Two NCP81045s
• Skip Mode for Power Saving Operation at Light Load
• Lossless Inductor Current Sensing
• Programmable Transient−Response−Enhancement (TRE) Control
• Programmable Adaptive Voltage Positioning (AVP)
• Input Supply Feedforward Control
• Internal Soft−Start
• Integrated Output Discharge (Soft−Stop)
• Build−in Adaptive Gate Drivers
• PGOOD Indication
• Overvoltage, Undervoltage and Overcurrent Protections
• Thermal Shutdown
• QFN16 Package
• These Devices are Pb−Free and are RoHS Compliant
Typical Applications
• Notebook Application
• System Power
This document contains information on a product under development. ON Semiconductor
reserves the right to change or discontinue this product without notice.
http://onsemi.com
MARKING
DIAGRAM
16
1
1
QFN16
CASE 485AP
NCP81045
ALYWG
G
NCP81045
A
L
Y
W
G
Device Code
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
(Note: Microdot may be in either location)
16 15 14 13
VIN 1
VCC 2
SYN 3
EN 4
NCP81045
12 VCCP
11 DL/TRESET
10 PGND
9 CS+
5678
QFN16
(Top View)
ORDERING INFORMATION
Device
Package
Shipping^†
NCP81045MNTXG QFN16 3000 / 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 Specification
Brochure, BRD8011/D.
© Semiconductor Components Industries, LLC, 2012
1
October, 2012 − Rev. P0
Publication Order Number:
NCP81045/D