AS1363

500mA, Low-Dropout Lin ear Vo ltage Regulator

Datash eet

www.austriamicrosystems.com

Revision 1.03

1 - 14

1 General Description

The AS1363 is a low-dropout linear regulator that oper-

ates from a +2.0V to +5.5V supply and delivers a guar-

anteed 500mA load current with low 150mV dropout.

The device is available in two versions (see Table 1).

One version has a high-accuracy output with a preset

voltage (1.2, 1.5, 1.8, 3.0, 3.3, or 4.5V). This voltage is

internally trimmed and also offers a Bypass pin. With a

capacitor connected to this Bypass pin, the PSRR and

the Noise performance is improved.

At the other version the output voltage is user-adjustable

(1.2V to 5.3V) and offers an SET pin for setting the out-

put voltage.

Table 1. Standard Products

A low supply current (65µA typ.) at maximum load is

making the device ideal for portable battery-operated

equipment.

Other features are included such as an active-low open-

drain reset output that indicates when the output is out

of regulation, a low-current (30nA typ.) shutdown mode,

an integrated short-circuit and a thermal shutdown pro-

tection.

The AS1363 is available in a 6-pin SOT23 package.

Figure 1. Typical Application Circuit

2 Key Features

!

Guaranteed Output Current: 500mA

!

Low Dropout: 150mV @ 500mA

!

2.0V to 5.5V Input Voltage

!

Fixed Output Voltage: 1.2V to 5.0V

!

User-Adjustable Output Voltage: 1.2V to 5.3V

!

Power OK Output

!

Low Quiescent Current: 40µA

!

Low Shutdown Current: 30nA

!

Thermal Overload Protection

!

Output Current Limit

!

6-pin SOT23 Package

3 Applications

The device is ideal for laptops, PDAs, portable audio

devices, mobile phones, cordless phones, and any other

battery-operated portable device.

Model

Output Type

BYP

SET

AS1363-AD

Adjustable

No

Yes

AS1363-_ _

Fixed

Yes

No

AS1363-AD

2.2µF

1

IN

6

OUT

3

EN

2

POK

5

SET

1µF

2.0V to 5.5V

1.2V to 5.3V

4

GND

On

Off

Supply Voltage

To Controller