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AS1331-BTDT-33 PDF预览

AS1331-BTDT-33

更新时间: 2022-12-27 17:49:42
品牌 Logo 应用领域
艾迈斯 - AMSCO 转换器
页数 文件大小 规格书
16页 2332K
描述
300mA Buck-Boost Synchronous DC/DC Converters

AS1331-BTDT-33 数据手册

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Datasheet  
AS1331  
300mA Buck-Boost Synchronous DC/DC Converters  
1 General Description  
2 Key Features  
Input Voltage Range: 1.8V to 5.5V  
This special device is a synchronous buck-boost DC/DC  
converter which can handle input voltages above, below,  
or equal to the output voltage.  
Output Voltages:  
- Fixed: 2.5V, 3.0V, 3.3V  
- Adjustable: 2.5V to 3.3V  
Due to the internal structure of the AS1331 which is  
working continuously through all operation modes this  
device is ideal for dual or triple cell alkaline/NiCad/NiMH  
as well as single cell Li-Ion battery applications.  
Output Current: 300mA @ 3.3V  
Up to 90% efficiency  
Power Good  
Because of the implemented Power Save Mode, the  
solution footprint and the component count is minimized  
and also over a wide range of load currents a high  
conversion efficiency is provided.  
Output Disconnection in Shutdown  
Automatic transition between Buck and Boost mode  
Ultra Low Quiescent Current: 22µA, Shutdown Cur-  
rent <1µA (Active Low)  
The device includes two N-channel MOSFET switches  
and two P-channel switches. Also following features are  
implemented: a quiescent current of typically 22µA  
(ideal for battery power applications), a shutdown  
current less than 1µA, current limiting, thermal shutdown  
and output disconnect.  
Short-Circuit Protection  
Low Battery detection  
Over Temperature Protection  
10-pin 3x3mm TDFN package  
The AS1331 is available in a 10-pin 3x3mm TDFN  
package with fixed and adjustable output voltage.  
3 Applications  
The AS1331 is an ideal solution for handheld  
computers, handheld instruments, portable music  
players and PDA’s. Two and three cell Alkaline, NiCd or  
NiMH or single cell Li battery powered products.  
Figure 1. AS1331 - Typical Application Diagram  
L1  
6.8µH  
SW1  
SW2  
2
4
Low Battery Detect  
R3  
5
8
1.8 to 5.5V  
VIN  
LBO  
C1  
1
7
10µF  
VOUT  
2.5V to 3.3V  
AS1331-AD  
VOUT  
LBI  
C2  
22µF  
R1  
10  
6
On  
Off  
FB  
EN  
R2  
PGND  
3
9
GND  
www.austriamicrosystems.com  
Revision 1.03  
1 - 16  

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