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PDF AX3001 Data sheet ( Hoja de datos )
| Número de pieza | AX3001 | |
| Descripción | Synchronous Boost DC/DC Regulator | |
| Fabricantes | Anxson | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AX3001 (archivo pdf) en la parte inferior de esta página. Total 6 Páginas | ||
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AHXX31000011
Synchronous Boost DC/DC Regulator
Features
Description
� Up to 94% Efficiency
� Low voltage start-up：0.9V
� Shut-down current: < 1μA
� 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: 0.35Ω
� 1.4MHz fixed frequency switching
� Automatic PWM/PFM mode switching
� High switch on current: 0.9A
� 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 AX3001 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. Automatic PWM/PFM
mode switching at light load saves power and
improve efficiency.
The AX3001 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 AX3001 regulators are available in the
industry standard SOT-23-6 power packages
(or upon request).
Order Information
AX3001 - ① ②
SYMBOL
①
②
www.anxson.com
DESCRIPTION
Denotes Output voltage:
A : Adjustable Output
Denotes Package Types:
F: SOT-23-6
TEL:0755-33128916
1FAX:0755-83194860
1 page  
AX3001
Application Information
SW (Pin 1): Switch Pin. Connect inductor
between SW and VIN. Keep these PCB trace
lengths as short and wide as possible to reduce
EMI and voltage overshoot.
GND (Pin 2): Signal and Power Ground.
Provide a short direct PCB path between GND
and the (–) side of the output capacitor(s).
FB (Pin 3): Feedback Input to the gm Error
Amplifier. Connect resistor divider tap to this
pin. The output voltage can be adjusted from
2.5V to 5V by: VOUT = 1.212V • [1 + (R1/R2)]
EN (Pin 4): Logic Controlled Shutdown Input.
EN = High: Normal free running operation,
1.5MHz typical operating frequency. EN = Low:
Shutdown, quiescent current <1µA. Output
capacitor can be completely discharged
through the load or feedback resistors.
VOUT (Pin 5): Output Voltage Sense Input and
Drain of the Internal Synchronous Rectifier
MOSFET. Bias is derived from VOUT. PCB trace
length from VOUT to the output filter capacitor(s)
should be as short and wide as possible.
VIN (Pin 6): Battery Input Voltage. The device
gets its start-up bias from VIN. Once VOUT
exceeds VIN, bias comes from VOUT. Thus, once
started, operation is completely independent
from VIN. Operation is only limited by the output
power level and the battery’s internal series
resistance.
Functional Diagram
www.anxson.com
TEL:0755-33128916
FAX:0755-83194860
5
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet AX3001.PDF ] | |
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