Synchronous PWM Controller
Description
NCP3011, NCV3011
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 integrated gate drivers and an internally set 400 kHz oscillator.
The NCP3011 has an externally compensated transconductance error amplifier with an internally fixed soft−start.
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° out−of−phase 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 14−pin TSSOP package.
Features
• Input Voltage Range from 4.
7 V to 28 V • 400 kHz Operation • 0.
8 V $1.
0% Reference Voltage • Buffered External +1.
25 V Reference • Current Limit and Short Circuit Protection • Power Good • Enable/Disable Pin • Input Undervoltage Lockout • External Synchronization • Output Overvoltage and Undervoltage Protection • NCV Prefix for Automotive and Other Applications Requiring Site
and Change Controls
• This is a Pb−Free Device
Typical Applications
• Set Top Box • Power Modules • ASIC / DSP Power Supply
VIN
CIN EN
VCC BST HSDR
CBST
PG VSW
VREF SYNC
LSDR
R ISET GND
Q1 LO
Q2 RFB1 RFB2
VOUT CO
RREF
COMP FB
CREF
RC CC2
C C1
Figure 1.
Typical Application Circuit
http://onsemi.
com
14
1 TSSOP−14 DT SUFFIX CASE 948G
MARKING DIAGRAM
14 3011
ALYWG G
1
3011= Device Code A = Assembly Location L = Wafer Lot Y = Year W = Work Week G = Pb−Free Package (Note: Microdot may be in either location)
VREF
EN NC SYNC PG COMP FB
PIN CONNECTIONS (TOP VIEW)
VCC BST HSDR VSW NC LSDR GND
ORDERING INFORMATION
Device
Package
Shipping†
NCP3011DTBR2G TSSOP−14 2500 / Tape & Reel (Pb−Free)
NCV3011DTBR2G...
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