ACE533J

500mA, Micropower, VLDO Linear Regulator

VER 1.2

1

Description

The ACE533J series are VLDO (very low dropout) linear regulators designed for low power portable

applications. Typical output noise is only 100

μV

just 320mV at the load current of 500mA.The internal P-channel MOSFET pass transistor requires no

base current, allowing the device to draw only 250μA during normal operation at the maximum load

current of 500mA.

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

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

protection and output current limiting.

Features



Very Low Dropout: 320mV (Max) at 500mA



Maximum Input Voltage: 6.0V



Low Noise (10Hz to 100kHz): 10

0μVRMS (Fixed Output, VOUT=1.0V);

60μVRMS (Adjustable Output, VOUT=1.0V);

200

μVRMS (Adjustable Output, VOUT=3.3V);

305μVRMS (Adjustable Output, VOUT=5.0V)



±2% Voltage Accuracy at 500mA



Fast Transient Response



Under Voltage Lockout



Fixed Output Voltage of ACE533J: 1.0V to 4.0V with 0.1V Interval



Adjustable Output Voltage



Output Current Limit



Stable with 1μF Output Capacitor



Short-Circuit and Thermal Overload Protection

Application



Bluetooth/802.11 Cards



PDAs and Notebook Computers



Portable Instruments and Battery-Powered Systems



Cellular Phones