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
http://onsemi.com
MARKING
DIAGRAM
UDFN10
MU SUFFIX
CASE 506AT
1532
AA
AaLYWG
G
Aa
L
Y
W
G
= Assembly Location
(may be 1 or 2 characters)
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
(Note: Microdot may be in either location)
PIN CONNECTION
FB1
EN1
VIN
SW1
GND
1
2
3
4
5
(Top View)
UDFN10
10
9
8
7
6
FB2
EN2
POR
SW2
MODE/
SYNC
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
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
Cellular Phones, Smart Phones and PDAs
Digital Still Cameras
MP3 Players and Portable Audio Systems
Wireless and DSL Modems
Portable Equipment
ORDERING INFORMATION
Device
NCP1532MUAATXG
Package
UDFN10
(Pb−Free)
Shipping
†
3000 /
Tape & Reel
Typical Applications
†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, 2010
June, 2010
−
Rev. 5
1
Publication Order Number:
NCP1532/D
ONSEMI [ ON SEMICONDUCTOR ]
