NCP3011 Datasheet, PDF (1/1 Pages) ON Semiconductor – Synchronous PWM Controller

NCP3011
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Synchronous PWM Controller
The NCP3011 is a PWM device designed to operate from a wide
input range and is capable of producing an output voltage as low as
0.8 V. The NCP3011 provides a 1.0 A gate driver and an internally set
400 kHz oscillator. The NCP3011 has an externally compensated
transconductance error amplifier with an internally fixed softïstart.
The NCP3011 incorporates output voltage monitoring with a Power
Good pin to indicate that the system is in regulation. The dual function
SYNC pin synchronizes the device to a higher frequency (Slave
Mode) or outputs a 180° outïofïphase clock signal to drive another
NCP3011 (Master Mode). Protection features include lossless current
limit and Short Circuit Protection, Output Overvoltage and
Undervoltage Protection, and Input Undervoltage Lockout. The
NCP3011 is available in a 14ïpin TSSOP package.
Features
• Input Voltage Range from 4.5 V to 28 V
• 400 kHz Operation
• 0.8 $1.0% Reference Voltage
• Buffered External +1.25 V Reference
• Current Limit and Short Circuit Protection
• Power Good
• Enable/Disable Pin
• Input and Output Voltage Protection
• External Synchronization
• Output Overvoltage and Undervoltage Protection
• This is a PbïFree Device
Typical Applications
• Set Top Box
• Power Modules
• ASIC / DSP Power Supply
VIN
4.5 ï 28 V
CIN
EN
PG
VCC BST
HSDR
VSW
CBST
Q1
LO
VOUT
VREF
SYNC
LSDR
R ISET
GND
Q2
RFB1
CO
RFB2
RREF
COMP ^FB
C REF
RC
C C1
CC2
Figure 1. Typical Application Circuit
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
14
1
TSSOPï14
DT SUFFIX
CASE 948G
MARKING DIAGRAM
14
NCP3011
ALYW
1
NCP3011
A
L
Y
W
= Device Code
= Assembly Location
= Wafer Lot
= Year
= Work Week
VREF
EN
NC
SYNC
PG
COMP
FB
PIN CONNECTIONS
(TOP VIEW)
VCC
BST
HSDR
VSW
NC
LSDR
GND
ORDERING INFORMATION
Device
Package
Shipping^†
NCP3011DTBR2G TSSOPï14
(PbïFree) 2500/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, 2009
1
October, 2009 ï Rev. P1
Publication Order Number:
NCP3011/D