NCP1532_11 Datasheet, PDF (1/16 Pages) ON Semiconductor – Dual Output Step-Down Converter 2.25 MHz High-Efficiency, Out of Phase Operation, Low Quiescent Current, Source up to 1.6 A

NCP1532
Dual Output Step-Down
Converter 2.25 MHz
High-Efficiency, Out of
Phase Operation, Low
Quiescent Current, Source
up to 1.6 A
The NCP1532 dual step down DCDC converter is a monolithic
integrated circuit dedicated to supply core and I/O voltages of new
multimedia design in portable applications powered from 1−cell
Li−ion or 3 cell Alkaline / NiCd / NiMH batteries.
Both channels are externally adjustable from 0.9 V to 3.3 V and can
source totally up to 1.6 A, 1.0 A maximum per channel. Converters are
running at 2.25 MHz switching frequency which reduces component
size by allowing the use of small inductor (down to 1 mH) and
capacitors and operates 180° out of phase to reduce large amount of
current demand on the battery. Automatic switching PWM/PFM mode
and synchronous rectification offer improved system efficiency. The
device can also operate into fixed frequency PWM mode for low noise
applications where low ripple and good load transients are required.
Additional features include integrated soft−start, cycle−by−cycle
current limit and thermal shutdown protection. The device can also be
synchronized to an external clock signal in the range of 2.25 MHz.
The NCP1532 is available in a space saving, ultra low profile
3x3 x 0.55 mm 10 pin mDFN package.
Features
• Up to 97% Efficiency
• 50 mA Quiescent Current
• Synchronous Rectification for Higher Efficiency
• 2.25 MHz Switching Frequency, 180° Out of Phase
• Sources up to 1.6 A, 1.0 A Maximum per Channel
• Adjustable Output Voltage from 0.9 V to 3.3 V
• Mode Selection Pin: Eco Mode or Low Noise Mode
• 2.7 V to 5.5 V Input Voltage Range
• Thermal Limit Protection
• Short Circuit Protection
• All pins are fully ESD Protected
• This is a Pb−Free Device
Typical Applications
• Cellular Phones, Smart Phones and PDAs
• Digital Still Cameras
• MP3 Players and Portable Audio Systems
• Wireless and DSL Modems
• Portable Equipment
http://onsemi.com
UDFN10
MU SUFFIX
CASE 506AT
MARKING
DIAGRAM
1532
AA
AaLYWG
G
Aa
= Assembly Location
(may be 1 or 2 characters)
L
= Wafer Lot
Y
= Year
W
= Work Week
G
= Pb−Free Package
(Note: Microdot may be in either location)
PIN CONNECTION
FB1
EN1
VIN
SW1
GND
1
10
2
9
3
8
4
7
5
6
(Top View)
UDFN10
FB2
EN2
POR
SW2
MODE/
SYNC
ORDERING INFORMATION
Device
Package Shipping^†
NCP1532MUAATXG UDFN10
3000 /
(Pb−Free) 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.
© Semiconductor Components Industries, LLC, 2011
1
October, 2011 − Rev. 6
Publication Order Number:
NCP1532/D