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AX3113A 데이터시트 PDF




AXElite에서 제조한 전자 부품 AX3113A은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


PDF 형식의 AX3113A 자료 제공

부품번호 AX3113A 기능
기능 PWM Control 2A Step-Down Converter
제조업체 AXElite
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AX3113A 데이터시트, 핀배열, 회로
AX3113A
PWM Control 2A Step-Down Converter
GENERAL DESCRIPTION
AX3113A consists of step-down switching regulator with PWM control. These devise
include a reference voltage source, oscillation circuit, error amplifier, internal PMOS and
etc.
AX3113A 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%.
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 voltage4.5V to 23V
- Output voltage0.8V to VCC
- Duty ratio0% to 100% PWM control
- Oscillation frequency330KHz 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.
1/8
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.3 Aug.16, 2010




AX3113A pdf, 반도체, 판매, 대치품
AX3113A
APPLICATION CIRCUIT
VIN+12V
C2
470uF
R4
100K
ON/OFF
C6
0.1uF
C3
0.1uF
AX3113A
FB VSS
EN VSS
NC SW
VCC
SW
VOUT = VFB x (1 +
R1
R2
)
VFB = 0.8V ; R2 suggest 0.8K ~ 6k
FUNCTION DESCRIPTIONS
L1
12
33uH
D1
B340
R1
6.8K
R2
1.3K
VOUT = 5V/2A
C8
0.1uF
C4
470uF
PWM Control
The AX3113A consists of DC/DC converters that employ a pulse-width modulation
(PWM) system. In converters of the AX3113A, 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.
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
0.8V
 1
R1
R2

Table 1 Resistor select for output voltage setting
VOUT
R2
R1
5V 1.3K 6.8K
3.3V 1.5K
4.7K
2.5V 2.2K
4.7K
1.8V 2K
2.5K
1.5V 2.2K
2.0K
1.2V 3K
1.5K
1.0V 3K 0.75K
4/8
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.3 Aug.16, 2010

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AX3113A 전자부품, 판매, 대치품
AX3113A
TYPICAL CHARACTERISTICS (CONTINUES)
100
90
80
70
60
50
40
30
20
10
0
0
IOUT VS. Efficiency
VOUT=5V
VOUT=3.3V
VIN=12V
10 100 300 500 1000 1500 2000
IOUT (mA)
100
90
80
70
60
50
40
30
20
10
0
0
IOUT VS. Efficiency
VVOOUUTT==32..35VV
VOUT=1.8V
VIN=5V
10 100 300 500 1000 1500 2000
IOUT (mA)
7/8
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.3 Aug.16, 2010

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PWM Control 2A Step-Down Converter

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PWM Control 2A Step-Down Converter

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