ACE5050LA

500mA High PSRR, Ultra-low Noise, Ultra-Fast CMOS LDO Regulator

VER 1.1

1

Description

The ACE5050LA is designed for portable applications with demanding performance and space

requirements. The ACE5050LA 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 ACE5050LA also works with low-ESR ceramic capacitors, reducing the

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

ACE5050LA consumes only 0.1µA current in shutdown mode and has fast turn-on time (Typical 100µs).

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 Transient Response

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High PSRR:

-85dB @ 300Hz

-80dB @ 1KHz

-54dB @ 1MHz

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0.1

μA Standby Current When Shutdown

⚫

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Wide Operating Voltage Ranges: 1.8V to 5.5V

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Current Limiting and Short Circuit Current Protection

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Thermal Shutdown Protection

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Only 1

μF Output Capacitor Required for Stability

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Fast output discharge

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Available in SOT23-5, SC70-5 and DFN1X1-4L Packages

Application

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Cellular and Smart Phones

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Cordless Telephones

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Camera and Machine Vision Modules

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Battery-Powered Equipment

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Laptop, Palmtops, Notebook Computers

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Hand-Held Instruments