NCP1523 Datasheet, PDF (1/14 Pages) ON Semiconductor – 3 MHz, 600 mA, High−Efficiency, Adjustable Output Voltage Stepdown Converter

NCP1523
3 MHz, 600 mA,
High−Efficiency, Adjustable
Output Voltage Stepdown
Converter
The NCP1523 stepdown PWM DC−DC converter is optimized for
portable applications powered from 1−cell Li−ion or 3−cell
Alkaline/NiCd/NiMH batteries. The device is available in an
adjustable output voltage from 0.9 V to 2.3 V. It uses synchronous
rectification to increase efficiency and reduce external part count. The
device also has a built−in 3 MHz (nominal) oscillator which reduces
component size by allowing a small inductor and capacitors.
Automatic switching PWM/PFM mode offers improved system
efficiency.
Finally, it includes an integrated soft−start, cycle−by−cycle current
limiting, and thermal shutdown protection. The NCP1523 is available
in a space saving, 8 pin chip scale package.
Features
• Up to 93% Efficiency
• Sources up to 600 mA
• 3 MHz Switching Frequency
• Adjustable Output Voltage from 0.9 V to 2.3 V
• 60 mA Quiescent Current
• Synchronous Rectification for Higher Efficiency.
• 2.7 V to 5.5 V Input Voltage Range
• Thermal Limit Protection
• Shutdown Current Consumption of 0.3 mA
• 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
V_IN
A2
V_IN
SW ^B1
L
http://onsemi.com
MARKING
DIAGRAM
NCP1523G
A1
AYWW
FLIP−CHIP−8
A1
CASE 766AE
A
= Assembly Location
Y
= Year
WW = Work Week
G
= Pb−Free Package
A1
A2
B1
B2
C1
C3
D1
D2
Top View
(Bumps Below)
PIN: A1 − GND
A2 − V_IN
B1 − SW
B2 − EN
C1 − GND
C2 − ADJ
D1 − V_OUT
D2 − FB
ORDERING INFORMATION
Device
Package
Shipping^†
NCP1523FCT2G FLIP−CHIP−8
(Pb−Free)
3000 /
Tape * Reel
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
V_OUT ^{Brochure, BRD8011/D.}
C_IN
C1
GND
V_OUT ^D1
C_OUT
A1
GND
ADJ ^C2
R1
OFF ON
B2 _EN
D2
FB
Figure 1. NCP1523 Typical Applications
R2
*For additional information on our Pb−Free strategy
and soldering details, please download the
ON Semiconductor Soldering and Mounting
Techniques Reference Manual, SOLDERRM/D.
© Semiconductor Components Industries, LLC, 2006
1
August, 2006 − Rev. 0
Publication Order Number:
NCP1523/D