NCP1522B_10 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
• Up to 93% Efficiency
• Allow Use of Small External Components
• Source up to 600 mA
• 3 MHz Switching Frequency
• Adjustable Output Voltage from 0.9 V to 3.3 V
• Synchronous Rectification for Higher Efficiency
• 2.7 V to 5.5 V Input Voltage Range
• Low Quiescent Current
• Shutdown Current Consumption of 0.3 mA
• Thermal Limit Protection
• Short Circuit Protection
• All Pins are Fully ESD Protected
• These are Pb−Free Devices
Typical Applications
• Cellular Phones, Smart Phones and PDAs
• Digital Still/Video Cameras
• MP3 Players and Portable Audio Systems
• Wireless and DSL Modems
• Portable Equipment
• USB 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
© Semiconductor Components Industries, LLC, 2010
1
December, 2010 − Rev. 1
Publication Order Number:
NCP1521B/D