NCP1522B Datasheet, PDF (1/14 Pages) ON Semiconductor – 3 MHz, 600 mA Step-Down DC-DC Converter

NCP1522B
3 MHz, 600 mA Step- Down
DC- DC Converter
High-Efficiency, Low Ripple, Adjustable
Output Voltage
The NCP1522B step- down DC- DC converter is a monolithic
integrated circuit optimized for portable applications powered from one
cell Li- Ion or three cell Alkaline/NiCd/NiMH batteries. The part,
available in adjustable output voltage versions ranging from 0.9 V to
3.3 V, is able to deliver up to 600 mA. 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 smaller inductors and capacitors. Automatic switching
PWM/PFM mode offers improved system efficiency.
Additional features include integrated soft- start, cycle- by- cycle
current limiting and thermal shutdown protection. The NCP1522B is
available in a space saving, low profile TSOP5 and UDFN6 packages.
Features
•ăUp to 93% Efficiency
•ăAllow Use of Small External Components
•ăSource up to 600 mA
•ă3 MHz Switching Frequency
•ăAdjustable Output Voltage from 0.9 V to 3.3 V
•ăSynchronous Rectification for Higher Efficiency
•ă2.7 V to 5.5 V Input Voltage Range
•ăLow Quiescent Current
•ăShutdown Current Consumption of 0.3 mA
•ăThermal Limit Protection
•ăShort Circuit Protection
•ăAll Pins are Fully ESD Protected
•ăThese are Pb-Free Devices
Typical Applications
•ăCellular Phones, Smart Phones and PDAs
•ăDigital Still/Video Cameras
•ăMP3 Players and Portable Audio Systems
•ăWireless and DSL Modems
•ăPortable Equipment
•ăUSB Powered Devices
http://onsemi.com
MARKING
DIAGRAM
5
1
TSOP-5
SN SUFFIX
CASE 483
5
GANAYWG
G
1
GAN = Specific Device Code
A
= Assembly Location
Y
= Year
W
= Work Week
G
= Pb-Free Package
(Note: Microdot may be in either location)
UDFN6
MU SUFFIX
CASE 517AB
1
6
2 ^BRMG 5
3 G4
BR = Specific Device Code
M
= Date Code
G
= Pb-Free Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
Device
Package
Shipping^†
NCP1522BSNT1G TSOP-5 3000/Tape & Reel
(Pb-Free)
NCP1522BMUTBG UDFN6 3000/Tape & Reel
(Pb-Free)
†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.
VIN
CIN
OFF ON
1 VIN LX 5
2 GND
3 EN
FB 4
L
COUT
Figure 1. Typical Application - TSOP-5
VOUT
R1
R2
OFF ON
Cff
1 EN FB 6
2 GND LX 5
3 VIN GND 4
R2
L R1
Cff
VOUT
COUT
CIN
VIN
Figure 2. Typical Application - UDFN6
©Ă Semiconductor Components Industries, LLC, 2007
1
May, 2007 - Rev. 0
Publication Order Number:
NCP1521B/D