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PDF AX3130 Data sheet ( Hoja de datos )
| Número de pieza | AX3130 | |
| Descripción | PWM Control 2A Step-Down Converter | |
| Fabricantes | AXElite | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AX3130 (archivo pdf) en la parte inferior de esta página. Total 15 Páginas | ||
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AX3130
PWM Control 2A Step-Down Converter
GENERAL DESCRIPTION
AX3130 consists of step-down switching regulator with PWM control. These devise
include a reference voltage source, oscillation circuit, error amplifier, internal PMOS and
etc.
AX3130 provides low-ripple power, high efficiency, and excellent transient
characteristics. The PWM control circuit is able to the duty ratio linearly form 0 up to 100%.
The converter frequency can be set by outside resistance. The wide range is from 200K to
1.3MHz. AX3130 is build out soft start function that prevent inrush current and overshooting.
A shutdown switch, over current protect and short circuit protect functions are built inside,
and when SCP happens, the operation frequency will be reduced to 150K. Also, an
external compensation block is built in to good stable system.
With the addition of an internal P-channel Power MOS, a coil, capacitors, and a diode
connected externally, these ICs can function as step-down switching regulators. They serve
as ideal power supply units for portable devices when coupled with the SOP-8L and
SOP-8L with exposed pad packages, providing such outstanding features as low current
consumption. Since this converter can accommodate an input voltage up to 23V, it is also
suitable for the operation via an AC adapter.
FEATURES
- Input voltage 4.5V to 23V
- Output voltage VFB to VCC
- Duty ratio 0% to 100% PWM control
- Oscillation frequency 200K~1.3MHz (Outside resistance setting)
- Current Limit (CL), Short Current Protection (SCP)
- External Soft-Start function and Shutdown Function.
- Thermal Shutdown function.
- Built-in internal SW P-channel MOS.
- SOP-8L and SOP-8L with exposed pad Pb-Free packages.
1/15
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.3 Aug.19, 2010
1 page  
(2) Stable Range
AX3130
DutyCycle(%)
=
VOUT
VIN
× 100
FUNCTION DESCRIPTIONS
PWM Control
The AX3130 consists of DC/DC converters that employ a pulse-width modulation
(PWM) system. In converters of the AX3130, the pulse width varies in a range from 0 to
100%, according to the load current. The ripple voltage produced by the switching can
easily be removed through a filter because the switching frequency remains constant. The
AX3130 frequency can be set by outside resistance that wide range from 200K to 1.3MHz.
Therefore, these converters provide a low-ripple power over broad ranges of input voltage
and load current.
Setting the Output Voltage
Application circuit item shows the basic application circuit with adjustable output
version. The external resistor sets the output voltage according to the following equation:
V OUT
0.6V
1
R1
R3
5/15
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.3 Aug.19, 2010
5 Page 
TYPICAL CHARACTERISTICS (CONTINUOUS)
AX3130
11/15
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.3 Aug.19, 2010
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet AX3130.PDF ] | |
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