© Semiconductor Components Industries, LLC, 2010
September, 2010 − Rev. 1
1 Publication Order Number:
NCP3012/D
NCP3012
Synchronous PWM Controller
The NCP3012 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 NCP3012 provides integrated gate drivers and an internally
set 75 kHz oscillator. The NCP3012 has an externally compensated
transconductance error amplifier with an internally fixed soft−start.
The NCP3012 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
NCP3012 (Master Mode). Protection features include lossless current
limit and short circuit protection, output overvoltage and undervoltage
protection, and input undervoltage lockout. The NCP3012 is available
in a 14−pin TSSOP package.
Features
• Input Voltage Range from 4.7 V to 28 V
• 75 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
• This is a Pb−Free Device
Typical Applications
• Set Top Box
• Power Modules
• ASIC / DSP Power Supply
VIN
VCC
BST
HSDR
VSW
LSDR
GND
FB
COMP
EN
PG
VREF
SYNC
C
BST
Q2
Q1
LO
R
ISET
RFB1
C
O
R
C
C
C2
CIN
C
C1
R
FB2
V
OUT
R
REF
CREF
Figure 1. Typical Application Circuit
TSSOP−14
DT SUFFIX
CASE 948G
MARKING DIAGRAM
http://onsemi.com
3012= Device Code
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = Pb−Free Package
1
14
3012
ALYWG
G
1
14
VREF
EN
NC
SYNC
PG
COMP
FB
HSDR
VCC
BST
VSW
NC
LSDR
GND
PIN CONNECTIONS
(TOP VIEW)
Device Package Shipping
†
ORDERING INFORMATION
NCP3012DTBR2G TSSOP−14
(Pb−Free)
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.
(Note: Microdot may be in either location)
