AS1339-BWLT

AS1339-BWLT Datasheet

AS1339

Part	Datasheet
AS1339-BWLT	AS1339-BWLT (pdf)

PDF Datasheet Preview
Datasheet AS1339 650mA RF Step-Down DC-DC for PA, with two LDOs 1 General Description The AS1339 is a high-frequency step-down converter optimized for dynamically powering the power amplifier PA in WCDMA or NCDMA handsets. The device uses a 110mΩ typical bypass FET to power the PA directly from the battery during high-power transmission. The IC integrates two 10mA low-noise, low-dropout regulators LDOs for PA biasing. With a switching frequency of 2MHz, the device allows optimization for smallest solution size or highest efficiency. The AS1339 supports fast switching using small ceramic 10uF input and 4.7µF output capacitors to maintain low ripple voltage. The AS1339 uses an analog input driven by an external DAC to control the output voltage linearly for continuous PA power adjustment. The gain from REFIN to OUT is 2.5V/V. At high-duty cycle, the device automatically switches to a bypass mode, connecting the input to the output through a low-impedance MOSFET. The LDOs are designed for low-noise operation, wherein each LDO in the device is individually enabled through its own logic control interface. The device is available in a 16-pin WLP 2x2mm package. 2 Key Features ! Fixed Switching Frequency 2MHz ! PA Step-Down Converter ! Low Dropout Voltage ! Low Output-Voltage Ripple ! Dynamic Output Voltage Control 0.8V to 3.75V ! 30µs Settling Time for 0.8V to 3.4V Output Voltage Change ! 650mA Output Drive Capability ! Two 10mA Low-Noise LDOs ! Low Shutdown Current ! Supply Voltage Range 2.7V to 5.5V ! Thermal Shutdown ! 16-pin WLP 2x2mm package 3 Applications The AS1339 is ideal for WCDMA/NCDMA cellular handsets, Wireless PDAs, and Smartphones. Figure AS1339 - Typical Operating Circuit VIN 2.7V to 5.5V IN1A 10µF IN1B Analog Control REFIN PA ON/OFF PA_EN LDO1 ON/OFF LDO2 ON/OFF VIN 2.7V to 5.5V TEST IN2 1µF AS1339 PAA PAB LX 2.2µH PGND NC VPA 0.8V to 3.75V 4.7µF AGND LDO1 2.85V 0.1µF LDO2 2.85V 0.1µF 1 - 25 AS1339 Datasheet - Pinout 4 Pinout Figure Pin Assignments Top View NC A1 LDO2 B1 IN2 C1 LDO1 D1 AGND A2 Datasheet - Ordering Information 11 Ordering Information The devices are available as the standard products shown in Table Table Ordering Information Ordering Code Marking AS1339-BWLT AS1339 650mA RF Step-Down DC-DC for PA, with two LDOs Delivery Form Package Tape and Reel 16-pin WLP 2x2mm Note All products are RoHS compliant and Pb-free. Buy our products or get free samples online at ICdirect: For further information and requests, please contact us or find your local distributor at 24 - 25 AS1339 Datasheet Copyrights Copyright 1997-2009, 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: 25 - 25

PDF Datasheet Preview

Datasheet

AS1339
650mA RF Step-Down DC-DC for PA, with two LDOs
1 General Description

The AS1339 is a high-frequency step-down converter optimized for dynamically powering the power amplifier PA in WCDMA or NCDMA handsets. The device uses a 110mΩ typical bypass FET to power the PA directly from the battery during high-power transmission. The IC integrates two 10mA low-noise, low-dropout regulators LDOs for PA biasing.

With a switching frequency of 2MHz, the device allows optimization for smallest solution size or highest efficiency. The AS1339 supports fast switching using small ceramic 10uF input and 4.7µF output capacitors to maintain low ripple voltage.

The AS1339 uses an analog input driven by an external DAC to control the output voltage linearly for continuous PA power adjustment. The gain from REFIN to OUT is 2.5V/V. At high-duty cycle, the device automatically switches to a bypass mode, connecting the input to the output through a low-impedance MOSFET. The LDOs are designed for low-noise operation, wherein each LDO in the device is individually enabled through its own logic control interface. The device is available in a 16-pin WLP 2x2mm package.
2 Key Features
! Fixed Switching Frequency 2MHz ! PA Step-Down Converter ! Low Dropout Voltage ! Low Output-Voltage Ripple ! Dynamic Output Voltage Control 0.8V to 3.75V ! 30µs Settling Time for 0.8V to 3.4V Output Voltage

Change ! 650mA Output Drive Capability ! Two 10mA Low-Noise LDOs ! Low Shutdown Current ! Supply Voltage Range 2.7V to 5.5V ! Thermal Shutdown ! 16-pin WLP 2x2mm package
3 Applications

The AS1339 is ideal for WCDMA/NCDMA cellular handsets, Wireless PDAs, and Smartphones.

Figure AS1339 - Typical Operating Circuit

VIN 2.7V to 5.5V IN1A
10µF IN1B

Analog Control

REFIN

PA ON/OFF

PA_EN

LDO1 ON/OFF

LDO2 ON/OFF

VIN 2.7V to 5.5V

TEST IN2
1µF

AS1339

PAA PAB LX
2.2µH

PGND NC

VPA 0.8V to 3.75V
4.7µF

AGND

LDO1 2.85V 0.1µF

LDO2 2.85V 0.1µF
1 - 25

AS1339

Datasheet - Pinout
4 Pinout

Figure Pin Assignments Top View

NC A1 LDO2 B1

IN2 C1 LDO1 D1

AGND A2
Datasheet - Ordering Information
11 Ordering Information

The devices are available as the standard products shown in Table
Table Ordering Information
Ordering Code

Marking

AS1339-BWLT

AS1339
650mA RF Step-Down DC-DC for PA, with two LDOs

Delivery Form

Package

Tape and Reel 16-pin WLP 2x2mm

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

For further information and requests, please contact us or find your local distributor at
24 - 25

AS1339

Datasheet

Copyrights

Copyright 1997-2009, 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:
25 - 25

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived AS1339-BWLT Datasheet file may be downloaded here without warranties.

Datasheet ID: AS1339-BWLT 519603