NCP3133A Datasheet, PDF (1/13 Pages) ON Semiconductor – Integrated Synchronous Buck Converter

NCP3133A
3 A Integrated Synchronous
Buck Converter
NCP3133A is a fully integrated synchronous buck converter for
3.3 V and 5 V step−down applications. It can provide up to 3 A load
current. NCP3133A supports high efficiency, fast transient response
and provides power good indicator. The control scheme includes two
operation modes: FCCM and automatic CCM/DCM. In automatic
CCM/DCM mode, the controller can smoothly switch between CCM
and DCM, where converter runs at reduced switching frequency with
much higher efficiency. NCP3133A is available in 3 mm x 3 mm
QFN−16 pin package.
Features
• High Efficiency in both CCM and DCM
• High Operation Frequency at 1.1 MHz
• Support MLCC Output Capacitor
• Small Footprint, 3 mm x 3 mm, 16−pin QFN Package
• Up to 3 A Continuous Output Current
• 2.9 V to 5.5 V Wide Conversion Voltage Range
• Output Voltage Range from 0.6 V to 0.84 X Vin
• Internal 400 ms Soft−Start
• Automatic Power−Saving Mode
• Voltage Mode Control
• Support Pre-bias Start−up Functionality
• Output Discharge Operation
• Over−Temperature Protection
• Built−in Over−Voltage, Under−Voltage and Over-Current Protection
• Power Good Indicator
• This is a Pb−Free Device
Applications
• 5 V Step Down Rail
• 3.3 V Step Down Rail
http://onsemi.com
1
QFN16 3 x 3, 0.5P
CASE 485DA
SUGGESTED PIN ARRANGEMENT
PGND PGND VIN VIN
16 15 14 13
EN ₁
12 VDD
NC 2
PGD 3
NCP3133A
11 AGND
10 FB
VBST 4
9 COMP
5678
SW SW SW PS
MARKING DIAGRAM
3133A
ALYWG
G
3133A
A
L
Y
W
G
= Specific Device Code
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
(*Note: Microdot may be in either location)
ORDERING INFORMATION
See detailed ordering, marking and shipping information in the
package dimensions section on page 12 of this data sheet.
© Semiconductor Components Industries, LLC, 2014
1
September, 2014 − Rev. 1
Publication Order Number:
NCP3133A/D