NCP3127 Datasheet, PDF (1/24 Pages) ON Semiconductor – 2 A Synchronous PWM Switching Converter

NCP3127
2 A Synchronous PWM
Switching Converter
The NCP3127 is a flexible synchronous PWM Switching Buck
Regulator. The NCP3127 is capable of producing output voltages as
low as 0.8 V. The NCP3127 also incorporates voltage mode control.
Switching frequency is internally set. The NCP3127 is currently
available in an SOIC−8 package.
Features
• 4.5 V to 13.2 V Operating Input Voltage Range
• 80 mW High−Side and Low−Side Switch
• Output Voltage Adjustable to 0.8 V
• 2 A Continuous Output Current
• Fixed 350 kHz PWM Operation
• 1.0% Initial Output Accuracy
• 75% Max Duty Ratio
• Short−Circuit Protection
• Programmable Current Limit
• This is a Pb−Free Device
Typical Application
• Set Top Boxes
• DVD Drives and HDD
• LCD Monitors and TVs
• Cable Modems
• Telecom / Networking / Datacom Equipment
http://onsemi.com
8
1
SOIC−8 NB
AL SUFFIX
CASE 751
MARKING
DIAGRAM
8
3127
ALYW
G
1
3127
A
L
Y
W
G
= Specific Device Code
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
PIN CONNECTIONS
NCP3127
PGND
1
VSW
FB
ISET
COMP
VIN
AGND
BST
(Top View)
4.5 V − 13.2 V
VIN
BST
VSW
PGND
NCP3127
ISET
FB1
COMP
AGND
Figure 1. Typical Application Circuit
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 23 of this data sheet.
3.3 V
100
95
5V
90
85
80
75
70
65
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2
OUTPUT CURRENT (A)
Figure 2. Efficiency (V_IN = 12 V) vs. Load Current
© Semiconductor Components Industries, LLC, 2010
1
May, 2010 − Rev. 0
Publication Order Number:
NCP3127/D