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AS1326B PDF预览

AS1326B

更新时间: 2024-02-26 02:19:37
品牌 Logo 应用领域
艾迈斯 - AMSCO 转换器升压转换器
页数 文件大小 规格书
18页 1038K
描述
High Current, 0.8A DC-DC Step-Up Converters

AS1326B 技术参数

生命周期:ObsoleteReach Compliance Code:unknown
风险等级:5.82Base Number Matches:1

AS1326B 数据手册

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Data Sheet  
AS1326  
High Current, 0.8A DC-DC Step-Up Converters  
1 General Description  
2 Key Features  
Up to 800mA Output  
The AS1326A/AS1326B are high-efficiency, high cur-  
rent, DC-DC step-up converters specifically designed for  
battery-powered wireless applications. Low quiescent  
supply current (65µA), high operating frequency (1MHz),  
and minimal external component requirements make  
these devices perfect for small hand-held applications.  
Constant-Frequency (1MHz) Operation  
Up to 96% Efficiency  
Input Range: 0.7 to 5.0V  
Table 1. Standard Products  
Fixed Output: 3.3V  
Model  
Input Signal Activation  
Logic-Low On  
Adjustable Output: 2.5 to 5.0V  
PWM Synchronous-Rectified Technology  
Logic-Controlled Shutdown: 0.1µA  
AS1326A  
AS1326B  
Logic-High On  
Both devices use synchronous-rectified pulse-width  
modulation (PWM) boost technology to generate 2.5 to  
5.0V outputs from a wide range of inputs, such as 1 to 3  
alkaline/NiCd/NiMH cells or a single lithium-ion (Li+)  
cell. Automatic powersave operation significantly  
improves efficiency at light-loads.  
Synchronizable Switching Frequency  
(0.5 to 1.2MHz)  
Adjustable Current Limit  
Adjustable Soft-Start  
Continuous switching mode is available for applications  
requiring constant-frequency operation at all load cur-  
rents. PWM operation can also be synchronized to an  
external clock to protect sensitive frequency bands in  
communications equipment.  
10-pin TDFN (3.0mm x 3.0mm) Package  
3 Applications  
Analog soft-start and adjustable current limit permit opti-  
mization of rush in current and external component size.  
The devices are ideal for digital cordless phones. mobile  
phones, wireless handsets, hand-held instruments,  
PDAs, two-way pagers, and any battery-operated equip-  
ment.  
The AS1326A/AS1326B are available in a 10-pin TDFN  
(3.0mm x 3.0mm) package.  
Figure 1. Block Diagram  
Undervoltage  
Lockout  
5
AS1326  
+
OUT  
IC Power  
2.15V  
9
On  
Startup  
Osc  
Q
D
10  
POUT  
AS1326B  
only  
ON  
10  
Controller  
AS1326A  
only  
8
ONN  
2
On  
Rdy  
En  
Osc  
LX  
Reference  
1.25V  
En  
Osc  
Ref GND  
1MHz Osc  
CLK/SEL Mode  
REF  
3
7
Mode  
PGND  
GND  
6
FB ISET  
CLK/SEL  
4
FB  
1
ISET  
www.austriamicrosystems.com  
Revision 1.02  
1 - 18  

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