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Axelite Confidential Materials, do not copy or distribute without written consent.

Rev.1.6 Oct.16, 2019

AX3301

PWM Step-Down Controller

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GENERAL DESCRIPTION

The AX3301 integrates Pulse-Width-Modulation (PWM) control circuit into a single

chip. These devise include a reference voltage source, oscillation circuit, error amplifier and

etc.

AX3301 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.

With the addition of an external P-channel Power MOS, a coil, capacitors, and a

diode connected externally, these components can function as step-down switching

regulators. They serve as ideal power supply units for portable devices when coupled with

the SOP-8L and MSOP-8L mini-package, providing such outstanding features as low

current consumption. Since this converter can accommodate an input voltage up to 24V, it

is also suitable for the operation via an AC adapter.



FEATURES

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Input voltage：4V to 24V

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Output voltage：0.8V to VCC

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Duty ratio：0% to 100% PWM control

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Oscillation frequency：330KHz typ.

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Current Limit (CL), Enable function.

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Thermal Shutdown function.

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Short Circuit Protect (SCP).

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External SW P-channel MOS.

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MSOP-8L and SOP-8L Pb-Free packages.

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RoHS and Halogen free compliance.