ACE575U

350mA, Micropower, Very Low Dropout Linear Regulator

VER 1.1

1

Description

The ACE575U series are very low dropout linear regulators designed for low power portable

applications. Typical output noise is only 195μVRMS and maximum dropout is just 110mV(Typ) at the

load current of 150mA.The internal P-channel MOSFET pass transistor requires no base current, allowing

the device to draw only 190μA during normal operation at the maximum load current of 350mA.With a

shutdown control pin, the ACE575U

consumes less than 1μA current in shutdown mode.

Other features include high output voltage accuracy, excellent transient response, under voltage lockout,

stability with ultralow ESR ceramic capacitors as small as 1μF, short-circuit and thermal overload

protection and output current limiting.

The ACE575U series are available in low profile SOT23-5 and DFN2*2-6L packages.

Features



Very Low Dropout: 150mV (Max) at 150mA



Maximum Input Voltage: 6.0V





≤1.5V



Fast Transient Response



Under Voltage Lockout



Adjustable Output Voltage of ACE575U from 1.0V to 5.0V



Output Current Limit



Stable with 1μF Output Capacitor



Short-Circuit and Thermal Overload Protection



Low Profile SOT23-5 and DFN2*2-6LPackages

Application



Bluetooth/802.11 Cards



PDAs and Notebook Computers



Portable Instruments and Battery-Powered Systems



Cellular Phones