AS1363
1 A L o w D r o p o u t L i n e a r Vo l t a g e R e g u l a t o r
1 General Description
The AS1363 is a low-dropout linear regulator that operates from a
+2.0V to +5.5V supply and delivers a guaranteed 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 (1.2V, 1.5V, 1.8V,
3.0V, 3.3V, 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 output voltage.
Table 1. Standard Products
Model
AS1363-AD
AS1363-_ _
Output Type
Adjustable
Fixed
BYP
No
Yes
SET
Yes
No
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
Output discharge path during shutdown
6-pin SOT23 Package
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 protection.
When in shutdown, a 5k (typ) discharge path is connected
between the output pin and ground. The AS1363 is available in a 6-
pin SOT23 package.
Figure 1. AS1363 - Typical Application Circuit
3 Applications
The device is ideal for laptops, PDAs, portable audio devices, mobile
phones, cordless phones, and any other battery-operated portable
device.
V
IN
2.0V
to 5.5V
C
IN
1µF
1
IN
6
OUT
C
OUT
2
.2µF
R
1
V
OUT
1.2V to 5.3V
On
Off
3
EN
2
POK
AS1363-AD
5
SET
R
2
4
GND
To Controller
R
POK
100k
V
OUT
Logic Sup-
ply Voltage
www.ams.com/LDO
Revision 1.9
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AMSCO [ AUSTRIAMICROSYSTEMS AG ]
