NCP1593_12 Datasheet, PDF (1/13 Pages) ON Semiconductor – 1 MHz, 3 A Synchronous Buck Regulator

NCP1593A, NCP1593B
1 MHz, 3 A Synchronous
Buck Regulator
The NCP1593 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 NCP1593 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 0.6 V and is able to supply up to 3 A of load current.
The NCP1593 includes an internally fixed switching frequency
(FSW), and an internal soft−start to limit inrush current. Other features
include cycle−by−cycle current limiting, 100% duty cycle operation,
short− circuit protection, power saving mode and thermal shutdown.
Features
• Wide Input Voltage Range: from 4.0 V to 5.5 V
• Internal 90 mW High−Side P−Channel MOSFET and 60 mW
Low−Side N−Channel MOSFET
• Fixed 1 MHz Switching Frequency
• Cycle−by−Cycle Current Limiting
• Hiccup Mode Short−Circuit Protection
• Overtemperature Protection
• Internal Soft−Start
• Start−up with Pre−Biased Output Load
• Adjustable Output Voltage Down to 0.6 V
• Diode Emulation During Light Load
• 100% Duty Cycle Operation to Extend the Battery Life
• These are Pb−Free Devices
Applications
• Set−Top Boxes
• DVD Drives and HDD
• LCD Monitors and TVs
• Cable Modems
• USB Modems
• Telecom/Networking/Datacom Equipment
http://onsemi.com
DFN10
CASE 485C
MARKING
DIAGRAMS
1593A
ALYWG
G
1593B
ALYWG
G
A
= Assembly Location
L
= Wafer Lot
Y
= Year
W
= Work Week
G
= Pb−Free Package
(Note: Microdot may be in either location)
PIN CONNECTIONS
NC 1
LX 2
LX 3
PG 4
EN 5
GND
10 VCCP
9 VCCP
8 VCCA
7 SS
6 FB
NCP1593A
(Top View)
LX 1
LX 2
LX 3
PG 4
EN 5
GND
10 VCCP
9 VCCP
8 VCCA
7 NC
6 FB
NCP1593B
(Top View)
ORDERING INFORMATION
Device
Package
Shipping^†
NCP1593AMNTWG DFN10 3000 / Tape &
(Pb−Free)
Reel
NCP1593BMNTWG 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, 2012
1
July, 2012 − Rev. 2
Publication Order Number:
NCP1593/D