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NCP1522 Datasheet(PDF) 1 Page - ON Semiconductor

No. de Pieza. NCP1522
Descripción  3.0 MHz, 600 mA, High−Efficiency, Low Quiescent Current, Adjustable Output Voltage Step−Down Converter
Descarga  17 Pages
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Fabricante  ONSEMI [ON Semiconductor]
Página de inicio  http://www.onsemi.com
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NCP1522 Datasheet(HTML) 1 Page - ON Semiconductor

 
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© Semiconductor Components Industries, LLC, 2006
August, 2006 − Rev. 3
1
Publication Order Number:
NCP1522/D
NCP1522
3.0 MHz, 600 mA,
High−Efficiency, Low
Quiescent Current,
Adjustable Output Voltage
Step−Down Converter
The NCP1522 step−down PWM DC−DC converter is optimized
for portable applications powered from one cell Li−ion or three cell
Alkaline/NiCd/NiMH batteries. The device is available in an
adjustable output voltage from 0.9 V to 3.3 V. It uses synchronous
rectification to increase efficiency and reduce external part count.
The device also has a built−in 3.0 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 NCP1522 is
available in a space saving, low profile TSOP5 package.
Features
93.8% of Efficiency for 3.3 V Output and 4.5 V Input and 120 mA
Load Current
Sources up to 600 mA
3.0 MHz Switching Frequency
Adjustable Output Voltage from 0.9 V to 3.3 V
60 mA Quiescent Current (Typ)
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
Short Circuit Protection
This is a Pb−Free Device
Typical Applications
Cellular Phones, Smart Phones and PDAs
MP3 Players and Portable Audio Systems
Wireless and DSL Modems
Portable Equipment
USB Powered Devices
Digital Still/Video Cameras
GND
2
VIN
1
EN
3
LX
5
FB
4
OFF ON
VIN
CIN
COUT
R1
R2
Cff
Figure 1. Typical Application
L
VOUT
TSOP−5
ASN SUFFIX
CASE 483
PIN CONNECTIONS
Device
Package
Shipping
ORDERING INFORMATION
NCP1522ASNT1G
TSOP−5
(Pb−Free)
3000/Tape & Reel
http://onsemi.com
MARKING
DIAGRAM
A
= Assembly Location
Y
= Year
W
= Work Week
G
= Pb−Free Package
(Note: Microdot may be in either location)
(Top View)
1
5
1
5
DBRAYW
G
G
1
2
3
5
4
VIN
GND
EN
LX
FB
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specification
Brochure, BRD8011/D.


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