NCP1597B_13 Datasheet, PDF (1/13 Pages) ON Semiconductor – 1 MHz, 2 A Synchronous Buck Regulator

NCP1597B
1 MHz, 2 A Synchronous
Buck Regulator
The NCP1597B is a fixed 1 MHz, high−output−current,
synchronous PWM converter that integrates a low−resistance,
high−side P−channel MOSFET and a low−side N−channel MOSFET.
The NCP1597B utilizes internally compensated current mode control
to provide good transient response, ease of implementation and
excellent loop stability. It regulates input voltages from 4.0 V to 5.5 V
down to an output voltage as low as 0.8 V and is able to supply up to
2 A.
The NCP1597B has features including fixed internal switching
frequency (FSW), and an internal soft−start to limit inrush current.
Using the EN pin, shutdown supply current is reduced to 3 mA
maximum.
Other features include cycle−by−cycle current limiting, short−
circuit protection, power saving mode and thermal shutdown.
Features
• Input Voltage Range: from 4.0 V to 5.5 V
• Internal 140 mW High−Side Switching P−Channel MOSFET and
90 mW Low−Side N−Channel MOSFET
• Fixed 1 MHz Switching Frequency
• Cycle−by−Cycle Current Limiting
• Overtemperature Protection
• Internal Soft−Start
• Start−up with Pre−Biased Output Load
• Adjustable Output Voltage Down to 0.8 V
• Power Saving Mode During Light Load
• These are Pb−Free Devices
Applications
• DSP Power
• Hard Disk Drivers
• Computer Peripherals
• Home Audio
• Set−Top Boxes
• Networking Equipment
• LCD TV
• Wireless and DSL/Cable Modem
• USB Power Devices
http://onsemi.com
DFN10
CASE 485C
MARKING
DIAGRAM
1597B
ALYWG
G
1597B
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)
PIN CONNECTIONS
EN 1
VCC 2
VCCP 3
AGND 4
FB 5
10 PGND
9 PGND
8 LX
7 LX
6 NC
(Top View)
ORDERING INFORMATION
Device
Package
Shipping^†
NCP1597BMNTWG DFN10 3000 / Tape &
(Pb−Free)
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.
© Semiconductor Components Industries, LLC, 2013
1
April, 2013 − Rev. 2
Publication Order Number:
NCP1597B/D