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

Rev.1.0 Nov.21 2011

AX6618

3A Ultra Low Dropout Linear Regulator

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GENERAL DESCRIPTION

The AX6618 is a 3A ultra low dropout linear regulator. This product is specifically

designed to provide well supply voltage for front-side-bus termination on motherboards and

NB applications. The IC needs two supply voltages, a control voltage for the circuitry and a

main supply voltage for power conversion, to reduce power dissipation and provide

extremely low dropout. The AX6618 integrates many functions. A Power-On-Reset (POR)

circuit monitors both supply voltages to prevent wrong operations. A thermal shutdown and

current limit functions protect the device against thermal and current over-loads. A POK

indicates the output status with time delay which is set internally. It can control other

converter for power sequence. The AX6618 can be enabled by other power system.

Pulling and holding the EN pin below 0.4V shuts off the output.

The AX6618 is available in SOP-8L-EP and TDFN-10L packages which features

small size as an Exposed Pad to reduce the junction-to-case resistance, being applicable

in 2~3W applications.



FEATURES

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Ultra Low Dropout - 0.20V(typical) at 3A Output Current

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Low ESR Output Capacitor (Multi-layer Chip Capacitors (MLCC)) Applicable

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0.5V Reference Voltage

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Fast Transient Response

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Adjustable Output Voltage by External Resistors

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Power-On-Reset Monitoring on Both VCNTL and VIN Pins

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Internal Soft-Start

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Under-Voltage Protection

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Current-Limit and Thermal Shutdown Protection

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Power-OK Output with a Delay Time

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SOP-8L-EP and TDFN-10L (3mm*3mm) Pb-Free Package.