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KX3001 Schematic ( PDF Datasheet ) - SZKXW

Teilenummer KX3001
Beschreibung Synchronous Boost DC/DC Regulator
Hersteller SZKXW
Logo SZKXW Logo 




Gesamt 8 Seiten
KX3001 Datasheet, Funktion
www.DataSheet.co.kr
Synchronous Boost DC/DC Regulator KX3001
KX3001
Features
Description
Up to 94% Efficiency
Low voltage start-up 0.9V
Shut-down current: < 1 A
Input voltage 0.9V 4.4V
Output voltage 2.5V 4.3V (Up to 5V
with Schottky)
Low switch on resistance RDS(ON),
Internal switch: 0.35
1.4MHz fixed frequency switching
High switch on current: 1A
Low profile SOT-23-6 package (lead-free
packaging is now available)
Applications
Digital cameras and MP3
Palmtop computers / PDAs
Cellular phones
Wireless handsets and DSL modems
PC cards
Portable media players
The KX3001 is high efficiency synchronous,
PWM step-up DC/DC converters optimized
to provide a high efficient solution to
medium power systems. The devices work
under the input voltage between 0.9V and
4.4V with a 1.4MHz fixed frequency
switching. These features minimize overall
solution footprint by allowing the use of tiny,
low profile inductors and ceramic
capacitors.
The KKX3001 is capable of supplying an
output voltage between 2.5V and 4.3V, the
internal synchronous switch is desired to
provide high efficiency without Schottky.
The devices also featured providing up to
260mA from a single AA cell input or up to
600mA from a 2-cell AA with a 3V/3.3V
output.
The KX3001 regulators are available in the
industry standard SOT-23-6 power packages
(or upon request).
Order Information
KX3001 -
:
SYMBOL
DESCRIPTION
Denotes Output voltage:
A : Adjustable Output
Denotes Package Types:
F: SOT-23-6
www.szkxw.com
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Datasheet pdf - http://www.DataSheet4U.net/






KX3001 Datasheet, Funktion
www.DataSheet.co.kr
KX3001
PCB LAYOUT GUIDELINES
The high speed operation of the KX3001 demands careful attention to board layout. You will not
get advertised performance with careless layout. Figure 2 shows the recommended component
placement. A large ground pin copper area will help to lower the chip temperature. A multilayer
board with a separate ground plane is ideal, but not absolutely necessary.
Figure 2. Recommended Component Placement for Single Layer Board
INDUCTOR SELECTION
The KX3001 can utilize small surface mount and chip inductors due to its fast 1.5MHz switching
frequency. Typically, a 2.2 H inductor is recommended for most applications. Larger values of
inductance will allow greater output current capability by reducing the inductor ripple current.
Increasing the inductance above 10µH will increase size while providing little improvement in
output current capability.
where:
= estimated efficiency
IP = peak current limit value (0.6A)
VIN = input (battery) voltage
D = steady-state duty ratio = (VOUT – VIN)/VOUT
f = switching frequency (1.5MHz typical)
L = inductance value
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