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PDF AX3113 Data sheet ( Hoja de datos )
| Número de pieza | AX3113 | |
| Descripción | PWM Control 2A Step-Down Converter | |
| Fabricantes | Axelite | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AX3113 (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
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AX3113
PWM Control 2A Step-Down Converter
GENERAL DESCRIPTION
AX3113 consists of step-down switching regulator with PWM control. These
devise include a reference voltage source, oscillation circuit, error amplifier, internal
PMOS and etc.
AX3113 provides low-ripple power, high efficiency, and excellent transient
characteristics. The PWM control circuit is able to very the duty ratio linearly form 0
up to 100%. An enable function, an over current protect function and short circuit
protect function are built inside, and when OCP or SCP happens, the operation
frequency will be reduced. Also, an internal compensation block is built in to
minimum external component count.
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 package, 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：4V to 23V
- Output voltage：0.8V to Vcc
- Duty ratio：0% to 100% PWM control
- Oscillation frequency：330KHz typ.
- Current Limit(CL), Enable function.
- Thermal Shutdown function.
- Short Circuit Protect (SCP).
- Built-in internal SW P-channel MOS.
- SOP-8L Pb-Free package.
www.gofotech.com Tel: 0755-6135 8291/8292
1/8
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.0 Nov.12, 2007
Datasheet pdf - http://www.DataSheet4U.net/
1 page  
www.DataSheet.co.kr
PWM Control 2A Step-Down Converter AX3113
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
=
0.8V
× ⎜⎛1 +
⎝
R1 ⎟⎞
R2 ⎠
Table 1 Resistor select for output voltage setting
VOUT
R2
R1
5V
1.3K 6.8K
5.6K 30K
3.3V
1.5K
5.6K
4.7K
18K
2.5V 2.2K 4.7K
1.8V 2K 2.5K
1.5V 2.2K 2.0K
1.2V 3K 1.5K
The R2 setting 5.6k that No load current can be reduce to under 4mA for EL CAP.
Inductor Selection
For most designs, the operates with inductors of 15µH to 33µH. The inductor value
can be derived from the following equation:
V (V V )× −
= OUT
IN OUT
L V ΔI f× ×
IN L OSC
Where is inductor Ripple Current. Large value inductors lower ripple current and small
value inductors result in high ripple currents. Choose inductor ripple current
approximately 15% of the maximum load current 2A, ΔIL=0.3A. The DC current rating of
the inductor should be at least equal to the maximum load current plus half the ripple
current to prevent core saturation (2A+0.15A).
www.gofotech.com Tel: 0755-6135 8291/8292
Axelite Confidential Materials, do not copy or distribute without written consent.
5/8
Rev.1.0 Nov.12, 2007
Datasheet pdf - http://www.DataSheet4U.net/
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet AX3113.PDF ] | |
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