NX4110 Datasheet, PDF (1/14 Pages) Microsemi Corporation – 1A SYNCHRONOUS BUCK SWITCHER WITH FET ON BOARD

NX4110
1A SYNCHRONOUS BUCK SWITCHER WITH FET ON BOARD
PRODUCTION DATA SHEET
Pb Free Product
DESCRIPTION
The NX4110 is a current mode PWM buck switcher with ⁿ
internal compensation, can provide up to 1A output cur- ⁿ
rent with FET on board. It operates from 2.8V to 5.5V ⁿ
and output as low as 0.6V which is ideal for the applica- ⁿ
tion with single cell Li-Ion battery as well as other 3.3V
input bus supply applications. Switching frequency is ⁿ
fixed 1MHz, small surface mount inductors and capaci- ⁿ
tors are allowed to use, make it good for portable appli- ⁿ
cations.
NX4110 is available in 5-pin SOT23 package.
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FEATURES
SOT23-5L package
Internal Digital Soft Start
Internally-compensated Current mode controller
Peak Current Limit with HICCUP Feature and Over
Temperature Protection
Prebias Start-up Operation
Pgood Available
Pb-free and RoHS compliant
APPLICATIONS
Li-Ion battery operated portable system
Cellular Phones
Portable applications
USB Devices
TYPICAL APPLICATION
5 _FB
1 _PGOOD
4
VIN
22uF(X5R,6.3V)
VIN=5V
SW ³
2
GND
2.2uH
10uF
(X5R, 6.3V)
Vout=2.5V
332k
105k
Fig.1 - Typical application of NX4110CZ1TR
ORDERING INFORMATION
Device
NX4110CZ1TR
Temperature
-40^oC to 85^oC
Package
SOT23-5L
Pb-Free
Yes
Rev. 2.0
Microsemi
1
12/30/09
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]