AS1363-BSTT-AD

AS1363-BSTT-AD Datasheet


AS1363

Part Datasheet
AS1363-BSTT-AD AS1363-BSTT-AD AS1363-BSTT-AD (pdf)
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Datasheet

AS1363
500mA, Low-Dropout Linear Voltage Regulator
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 One version has a high-accuracy output with a preset voltage 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 Standard Products

Model Output Type BYP

AS1363-AD Adjustable

AS1363-_ Fixed

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 opendrain 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.

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

Figure AS1363 - Typical Application Circuit

VIN 2.0V to 5.5V

IN CIN 1µF
6 OUT

AS1363-AD

To Controller

VOUT Logic Supply Voltage

RPOK 100kΩ
2 POK
4 GND

COUT 2.2µF

VOUT 1.2V to 5.3V
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AS1363

Datasheet - Pinout
4 Pinout

Pin Assignments

Figure Pin Assignments Top View
6 OUT

POK 2 AS1363 5 SET/BYP
4 GND

Pin Descriptions

Table Pin Descriptions Pin Number Pin Name
The output voltage is delivered back through either an internal resistive divider connected to OUT or an external resistor network connected to SET see Figure The comparator examines VSET/BYP and selects the feedback path. If VSET/BYP is less than 50mV, the internal feedback path is used and the output is regulated to the factory-preset voltage see Ordering Information on page

Internal P-Channel Pass Transistor

The AS1363 features a P-channel MOSFET pass transistor and consumes only a maximum of 200µA of quiescent current under heavy loads as well as in dropout.

Shutdown

If pin EN is connected to GND the AS1363 is disabled. In shutdown mode all internal circuits are turned off, reducing supply current to 30nA typ. . For normal operation pin EN must be connected to IN. During shutdown, POK is low.
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AS1363

Datasheet - Detailed Description

Output Voltage Selection
The AS1363 is available in two versions see Ordering Information on page One version can only operate at one fixed output voltage and the other version can operate with a preset output voltage or with user-adjustable output voltages 1.2V to 5.3V .
! For the fixed output voltage version connect a capacitor CBYP from pin BYP to VOUT to improve PSRR and Noise performance see Figure
! To use the factory preset output voltage of the user-adjustable output voltage version, connect pin SET to GND see Figure
! For configurations using an output voltage other than the factory preset, a voltage-divider from OUT to SET to GND is required, as shown in see Figure 1 on page A value for R2 in the 25kΩ to 100kΩ range should be sufficient. Calculate the value for R1 as:

Where:

VOUT is in a range from 1.2V to 5.3V. VSET/BYP = 1.2V.
----V----O----U----T----VSETBYP

Figure Fixed Output Voltage

VIN 2.0V to 5.5V

IN CIN 1µF
4 GND

AS1363
6 OUT

RPOK 100kΩ
2 POK

To Controller
5 BYP

VOUT 1.2V to 5.0V COUT 2.2µF

CBYP 10nF

Figure Adjustable Output using preset Output Voltage

VIN 2.5V to 5.5V

On Off
1 IN CIN 1µF

AS1363-AD
6 OUT

RPOK 100kΩ
2 POK

To Controller

VOUT 2.5V

COUT 2.2µF
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AS1363

Datasheet - Detailed Description

Power-OK

The AS1363 features a power-ok indicator that asserts when the output voltage falls out of regulation. The open-drain POK output goes low when output voltage at OUT falls 6% below its nominal value. A 100kΩ pull-up resistor from POK to a typically OUT provides a logic control signal. POK can be used as a power-on-reset POR signal to a microcontroller or can drive an external LED to indicate a power failure condition.

Note POK is low during shutdown.

Current Limit

The AS1363 features current limiting circuitry that monitors the pass transistor, limiting short-circuit output current to 0.8A typ . The circuitry of the AS1363 allows that the output can be shorted to ground for an indefinite period of time without damaging the device.

Thermal Overload Protection

Integrated thermal overload protection limits the total power dissipation in the AS1363. When the junction temperature TJ exceeds +170ºC typically, the pass transistor is turned off. Normal operation is continued when TJ drops approximately 20ºC.

Note Regardless of the hysteresis, continuous short-circuit condition will result in a pulsed output.
Datasheet - Ordering Information
11 Ordering Information

The device is available as the standard products shown in Table
Table Ordering Information
Ordering Code

AS1363-BSTT-AD

AS1363-BSTT-12* AS1363-BSTT-15 AS1363-BSTT-18 AS1363-BSTT-30 AS1363-BSTT-33 AS1363-BSTT-45

Marking

ASQ9

ASRY ASRA ASRB ASRC ASRD ASRE

Output adjustable preset to 2.5V
1.2V 1.5V 1.8V 3.0V 3.3V 4.5V

SET/BYP

Delivery Form

Tape and Reel

Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel

Package
6-pin SOT23
6-pin SOT23 6-pin SOT23 6-pin SOT23 6-pin SOT23 6-pin SOT23 6-pin SOT23
*Future product.

Non-standard devices are available between 1.4V and 4.6V in 50mV steps and between 4.6V and 5.0V in 100mV steps. For more information and inquiries contact

Note All products are RoHS compliant. Buy our products or get free samples online at ICdirect:

Technical Support is found at

For further information and requests, please contact us or find your local distributor at
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AS1363

Datasheet

Copyrights

Copyright 1997-2010, austriamicrosystems AG, Tobelbaderstrasse 30, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. All products and companies mentioned are trademarks or registered trademarks of their respective companies.

Disclaimer

Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. austriamicrosystems AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. austriamicrosystems AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with austriamicrosystems AG for current information. This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing by austriamicrosystems AG for each application. For shipments of less than 100 parts the manufacturing flow might show deviations from the standard production flow, such as test flow or test location. The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However, austriamicrosystems AG shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of austriamicrosystems AG rendering of technical or other services.

Contact Information

Headquarters austriamicrosystems AG Tobelbaderstrasse 30 A-8141 Unterpremstaetten, Austria Tel +43 0 3136 500 0 Fax +43 0 3136 525 01

For Sales Offices, Distributors and Representatives, please visit:
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Datasheet ID: AS1363-BSTT-AD 519621