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PDF AX3140 Data sheet ( Hoja de datos )
| Número de pieza | AX3140 | |
| Descripción | PWM Control 3A Step-Down Converter | |
| Fabricantes | AXElite | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AX3140 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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AX3140
PWM Control 3A Step-Down Converter
GENERAL DESCRIPTION
AX3140/A consists of step-down switching regulator with PWM control. These devise
include a reference voltage source, oscillation circuit, error amplifier, internal PMOS and
etc.
AX3140/A 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%.
This converter is build out soft start function that prevents overshoot and inrush current at
startup. 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. An external
compensation is easily to system stable; the low ESR output capacitor can be used.
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 with
exposed pad package, providing such outstanding features as low current consumption.
Since this converter can accommodate an input voltage up to 40V, it is also suitable for the
operation via an AC adapter.
FEATURES
- Input voltage：8V to 40V
- Output voltage：3.3V to 38V
- Duty ratio：0% to 100% PWM control
- Soft-Start function
- Current Limit, Short Circuit Protect (SCP) and Thermal Shutdown protection
- Built-in internal SW P-channel MOS.
- SOP-8L-EP Pb-Free package.
1/12
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.2 Apr. 21, 2011
1 page  
APPLICATION CIRCUIT
(1) AX3140
AX3140
COUT ESR Range
30m~80mΩ
80m~300mΩ
(2) AX3140A
EL Capacitor Compensation Table
VOUT
R2
C9
5.0V 470R 10N
3.3V 2KR 4N7
5.0V 470R 10N
3.3V 2KR 4N7
C2
1800P
1200P
3300P
1000P
COUT ESR Range
30m~80mΩ
80m~300mΩ
EL Capacitor Compensation Table
VOUT
R2
C9
5.0V 470R 4N7
3.3V 470R 10N
5.0V 470R 4N7
3.3V 470R 10N
C2
1200P
1000P
470P
180P
5/12
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.2 Apr. 21, 2011
5 Page 
AX3140
TYPICAL CHARACTERISTICS (CONTINUOUS)
VIN=12V, VOUT=5V, IOUT=2.7A, CSS=100n
VIN=32V, VOUT=5V, IOUT=2.7A, CSS=100n
VIN=32V, VOUT=5V, IOUT=2.7A, CSS=10n
VIN=32V, VOUT=5V, IOUT=2.7A, CSS=100n
VIN=12V, VOUT=5V, IOUT=0.3~2.7A
VIN=32V, VOUT=5V, IOUT=0.3~2.7A
11/12
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.2 Apr. 21, 2011
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet AX3140.PDF ] | |
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