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AX3113-V1.8
1/8
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.8 Aug.16, 2010
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 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.
授权代理商:深圳市四海恒通科技有限公司 电话:0755-8398 3377 135 9011 2223
2/8
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.8 Aug.16, 2010
AX3113
BLOCK DIAGRAM
Vcc
Oscillation
Circuit Reference Voltage
+
-
Vss
VEN
EN OCSET
FB
SW
Thermal
Shutdown
110uA
-PWM Switched
Control Circuit
PIN ASSIGNMENT
The package of AX3113 is SOP-8L; the pin assignment is given by:
( Top View )
1
2
3
4
8
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