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NCP1529ASNT1G Datasheet, PDF (1/16 Pages) ON Semiconductor – 1.7MHz, 1A, High Efficiency, Low Ripple, Adjustable Output Voltage Step-down Converter | |||
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NCP1529
1.7MHz, 1A, High Efficiency,
Low Ripple, Adjustable
Output Voltage Step-down
Converter
The NCP1529 stepâdown DCâDC converter is a monolithic
integrated circuit for portable applications powered from one cell
Liâion or three cell Alkaline/NiCd/NiMH batteries. The device is able
to deliver up to 1.0 A on an output voltage range externally adjustable
from 0.9 V to 3.9 V or fixed at 1.2 V or 1.35 V. It uses synchronous
rectification to increase efficiency and reduce external part count. The
device also has a builtâin 1.7 MHz (nominal) oscillator which reduces
component size by allowing a small inductor and capacitors. Automatic
switching PWM/PFM mode offers improved system efficiency.
Additional features include integrated softâstart, cycleâbyâcycle
current limiting and thermal shutdown protection.
The NCP1529 is available in a space saving, low profile
2x2x0.5 mm UDFN6 package and TSOPâ5 package.
Features
⢠Up to 96% Efficiency
⢠Best In Class Ripple, including PFM mode
⢠Source up 1.0 A
⢠1.7 MHz Switching Frequency
⢠Adjustable from 0.9 V to 3.9 V or Fixed at 1.2 V or 1.35 V
⢠Synchronous rectification for higher efficiency
⢠2.7 V to 5.5 V Input Voltage Range
⢠Low Quiescent Current 28 mA
⢠Shutdown Current Consumption of 0.3 mA
⢠Thermal Limit Protection
⢠Short Circuit Protection
⢠All Pins are Fully ESD Protected
⢠These are PbâFree Devices
http://onsemi.com
MARKING
DIAGRAM
5
1
TSOPâ5
SN SUFFIX
CASE 483
5
DXJAYWG
G
1
DXJ = Specific Device Code
A
= Assembly Location
Y
= Year
W
= Work Week
G
= PbâFree Package
(Note: Microdot may be in either location)
UDFN6
MU SUFFIX
CASE 517AB
1
6
2 XXMG 5
3 G4
XX = Specific Device Code
M
= Date Code
G
= PbâFree Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 14 of this data sheet.
Typical Applications
⢠Cellular Phones, Smart Phones and PDAs
⢠Digital Still Cameras
⢠MP3 Players and Portable Audio Systems
⢠Wireless and DSL Modems
⢠USB Powered Devices
⢠Portable Equipment
VIN
L
VIN SW
VOUT
VIN
L
VIN SW
VOUT
CIN
COUT
CIN
COUT
OFF ON
EN FB
GND
R1
Cff
OFF ON
R2
EN FB
GND
Figure 1. Typical Application for Adjustable Version
Figure 2. Typical Application for Fixed Version
© Semiconductor Components Industries, LLC, 2010
1
September, 2010 â Rev. 5
Publication Order Number:
NCP1529/D
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