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Rev.1.6.Nov.14, 2019

AX6646/A

300mA LDO Regulator with Enable



GENERAL DESCRIPTION

The AX6646/A is a 300mA, low quiescent, high PSRR, low noise and low dropout

linear regulator. The Device includes pass element, error amplifier, band-gap, current limit

and thermal shutdown circuitry. The characteristics of low dropout voltage and less

quiescent current make it good for some critical current application, for example, some

battery powered devices. The typical quiescent current is approximately 40µA. In the

shutdown mode, the maximum supply current is less than 1uA. The Output voltage is

adjustable from 0.8V to 5.5V. Built-in current-limit, Short current protection and

thermal-shutdown functions prevent any fault condition from IC damage.



FEATURES

-

Input voltage range is up to 6V

-

200mV Dropout at 150mA output current

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Guaranteed 300mA output current

-

Low quiescent current 40µA (typ.)

-

Adjustable Output voltage form 0.8V to 5.5V

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Maximum shutdown current <1uA

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Fast transient response

-

Current limit and thermal shutdown protection

-

Short circuit current fold-back

-

Available in the 5-Pin Pb-Free SOT23 Package

-

RoHS and Halogen free compliance.



BLOCK DIAGRAM

Current

Limit

- +

VIN

VOUT

GND

Error

Amp

Bandgap

Thermal

Shutdown

Enable

EN

FB