ON NCP3011DTBR2G Synchronous pwm controller Datasheet

NCP3011
Product Preview
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 softstart.
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° outofphase 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 14pin TSSOP package.
http://onsemi.com
14
1
TSSOP14
DT SUFFIX
CASE 948G
Features
•
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•
•
•
•
•
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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 PbFree Device
MARKING DIAGRAM
14
NCP3011
ALYW
1
NCP3011
A
L
Y
W
Typical Applications
PIN CONNECTIONS
• Set Top Box
• Power Modules
• ASIC / DSP Power Supply
VREF
EN
BST
LO
VREF
LSDR
SYNC
GND
Q2
COMP
C REF
RC
(TOP VIEW)
CO
ORDERING INFORMATION
RFB2
Device
FB
Package
Shipping†
NCP3011DTBR2G TSSOP14
(PbFree) 2500/Tape&Reel
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.
© Semiconductor Components Industries, LLC, 2009
October, 2009 Rev. P1
GND
RFB1
R ISET
RREF
LSDR
VOUT
VSW
PG
NC
COMP
FB
Q1
HSDR
HSDR
VSW
PG
CBST
VCC
VCC
BST
EN
NC
SYNC
VIN
4.5 28 V
CIN
= Device Code
= Assembly Location
= Wafer Lot
= Year
= Work Week
1
†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.
Publication Order Number:
NCP3011/D
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