ACE537P

Low Noise High PSRR High Speed CMOS LDO

VER 1.1

1

Description

The ACE537P is a high accuracy, low noise, high speed, low dropout CMOS Linear regulator with high

ripple rejection and fast discharge function. The devices offer a new level of cost effective performance in

cellular phones, laptop and notebook computers, and other portable devices.

The current limiter's fold-back circuit also operates as a short circuit protection and an output current

limiter at the output pin.

The ACE537P regulators are available in standard SOT-23-5 packages. Standard products are Pb-free

and Halogen-free.

Features



Input voltage : 2.5V~5.5V



Output range : 1.2V~3.3V



Output current: 300mA Typ



PSRR: 70dB @ 1KHz





Quiescent current: 30μA Typ.



Shut-

down current: < 1μA



Recommend capacitor: 1uF





Fast Discharge Function

Application



MP3/MP4 Players



Cellphones, radiophone, digital cameras



Bluetooth, wireless handsets



Others portable electronic device

Absolute Maximum Ratings

(Note)

Symbol

Items

Value

Unit

V

IN

Input Voltage

-0.3～6

V

V

EN

Enable Pin

-0.3～6

V

V

pin

All Other Pins

GND-0.3 to VDD+0.3

V

P

DMAX

Power Dissipation

SOT23-5

0.3

W

T

J

Junction Temperature

-40~125

℃

Storage Temperature

-55 to 150

℃

Package Lead Soldering Temperature

260℃, 10s

Note: Exceed these limits to damage to the device. Exposure to absolute maximum rating conditions may affect device reliability.