ACE5055LA

300mA Ultra-low Noise, Ultra-Fast CMOS LDO Regulator

VER 1.1

1

Description

The ACE5055LA is designed for portable applications with demanding performance and space

requirements. The ACE5055LA performance is optimized for battery-powered systems to deliver ultra-low

noise and low quiescent current. Regulator ground current increases only slightly in dropout, further

prolonging the battery life. The ACE5055LA also works with low-ESR ceramic capacitors, reducing the

amount of board space necessary for power applications, critical in hand-held wireless devices. The

ACE5055LA consumes only 0.01µA current in shutdown mode and has fast turn-on time (Typical 50µs).

The other features include ultra-low dropout voltage, high output accuracy, current limiting protection, and

high ripple rejection ratio.

Features

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Ultra-low Noise

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Ultra-Fast Response in Line/Load Transient

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0.01

μA Standby Current When Shutdown

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Low Dropout: 230mV@300mA

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Wide Operating Voltage Ranges: 2.2V to 5.5V

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Low Temperature Coefficient

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Current Limiting Protection

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Thermal Shutdown Protection

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Only 1

μF Output Capacitor Required for Stability

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High Power Supply Rejection Ratio

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Fast output discharge

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Available in SOT23-5、SOT23-3、SC70-5 and DFN1×1-4L Package

Application

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Cellular and Smart Phones

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Cordless Telephones

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Battery-Powered Equipment

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Laptop, Palmtops, Notebook Computers

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Hand-Held Instruments

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PCMCIA Cards

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MP3/MP4/MP5 Players

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Portable Information Appliances